def fit(self,X,Budget=None,W=None):
self.X = cuda.to_device(X.astype(np.float64,order='F'))
self.Budget = cuda.device_array((self.budgetSize,self.X.shape[1]),dtype=np.float64,order='F')
self.kx = cuda.device_array((self.budgetSize,self.X.shape[0]),dtype=np.float64,order='F')
self.Wkx = cuda.device_array((self.latentTopics,self.X.shape[0]),dtype=np.float64,order='F')
self.H = cuda.device_array((self.latentTopics,self.X.shape[0]),dtype=np.float64,order='F')
if Budget is None:
permutation = np.random.permutation(self.X.shape[0])
self.permutation = cuda.to_device(permutation)
initBudget(self.X,self.permutation,self.Budget)
else:
self.Budget = cuda.to_device(Budget.astype(np.float64,order='F'))
self.calculateKB()
self.calculateKX()
if W is None:
self.initW()
else:
self.W = cuda.to_device(W.astype(np.float64,order='F'))
self.t = 0
for i in xrange(self.epochs):
print "Epoch " + str(i)
samples,features = self.X.shape
permutation = getPermutation(samples,self.miniBatchSize)
self.permutation = cuda.to_device(permutation)
for j in xrange((samples + self.miniBatchSize) / self.miniBatchSize):
loadBatch(self.kx,self.permutation,j,self.kxi)
self.nextW()
self.t += 1
self.predictH()
def monte_carlo_pricer(paths, dt, interest, volatility):
n = paths.shape[0]
blksz = 512
gridsz = int(math.ceil(float(n) / blksz))
stream = cuda.stream()
prng = curand.PRNG(curand.PRNG.MRG32K3A, stream=stream)
qrng = curand.QRNG(curand.QRNG.SOBOL32, stream=stream)
d_normdist = cuda.device_array(n, dtype=np.double, stream=stream)
d_seed = cuda.device_array(n, dtype=np.uint32, stream=stream)
prng.normal(d_normdist, 0, 1)
qrng.generate(d_seed)
d_paths = cuda.to_device(paths, stream=stream)
c0 = interest - 0.5 * volatility**2
c1 = volatility * math.sqrt(dt)
griddim = gridsz, 1
blockdim = blksz, 1, 1
cu_monte_carlo_pricer[griddim, blockdim, stream](d_paths, dt, c0, c1,
d_normdist, d_seed)
d_paths.to_host(stream)
stream.synchronize()
def monte_carlo_pricer(paths, dt, interest, volatility):
n = paths.shape[0]
blksz = 512
gridsz = int(math.ceil(float(n) / blksz))
stream = cuda.stream()
prng = curand.PRNG(curand.PRNG.MRG32K3A, stream=stream)
qrng = curand.QRNG(curand.QRNG.SOBOL32, stream=stream)
d_normdist = cuda.device_array(n, dtype=np.double, stream=stream)
d_seed = cuda.device_array(n, dtype=np.uint32, stream=stream)
prng.normal(d_normdist, 0, 1)
qrng.generate(d_seed)
d_paths = cuda.to_device(paths, stream=stream)
c0 = interest - 0.5 * volatility ** 2
c1 = volatility * math.sqrt(dt)
griddim = gridsz, 1
blockdim = blksz, 1, 1
cu_monte_carlo_pricer[griddim, blockdim, stream](d_paths, dt, c0, c1,
d_normdist, d_seed)
d_paths.to_host(stream)
stream.synchronize()
def __init__(self,budgetSize,latentTopics,miniBatchSize,epochs,Gamma,Lambda,Alpha,metric='rbf',sigma=1.0):
"""
OKMF class: OKMF is a method to perform a matrix factorization in a
feature space.
Parameters
----------
budgetSize : int
Budget size.
latentTopics: int
Latent topics.
miniBatchSize : int
Size of minibatch.
epochs : int
Number of epochs.
Gamma : float
Gamma parameter
Lambda : float
Lambda parameter
Alpha: float
Alpha parameter
metric : string
Type of kernel. Default rbf
sigma : float
RBF kernel sigma parameter. Default 1.0.
"""
self.budgetSize = budgetSize
self.latentTopics = latentTopics
self.miniBatchSize = miniBatchSize
self.epochs = epochs
self.Gamma = Gamma
self.Lambda = Lambda
self.Alpha = Alpha
self.metric = metric
self.sigma = sigma
self.W = None
self.h = cuda.device_array((latentTopics,miniBatchSize),dtype=np.float64,order='F')
self.KB = cuda.device_array((budgetSize,budgetSize),dtype=np.float64,order='F')
self.kxi = cuda.device_array((budgetSize,miniBatchSize),dtype=np.float64,order='F')
self.Blas = cublas.Blas()
self.X = None
self.Budget = None
self.permutation = None
self.kx = None
self.Wkx = None
self.H = None
self.KBW = cuda.device_array((budgetSize,latentTopics),dtype=np.float64,order='F')
self.KBWh = cuda.device_array((budgetSize,miniBatchSize),dtype=np.float64,order='F')
self.KBWhh = cuda.device_array((budgetSize,latentTopics),dtype=np.float64,order='F')
self.grad = cuda.device_array((budgetSize,latentTopics),dtype=np.float64,order='F')
self.kxih = cuda.device_array((budgetSize,latentTopics),dtype=np.float64,order='F')
self.WKBW = cuda.device_array((latentTopics,latentTopics),dtype=np.float64,order='F')
self.Wkxi = cuda.device_array((latentTopics,miniBatchSize),dtype=np.float64,order='F')
eyeAlpha = np.eye(latentTopics) * Alpha
self.eyeAlpha = cuda.to_device(eyeAlpha.astype(np.float64,order='F'))
def T(self, a, out=None):
"""Returns the transpose of a 2D array.
Parameters
----------
a : array-like
Numpy or DeviceNDArray to transpose.
out : DeviceNDArray (optional)
Array to overwrite with result.
"""
a, out_dtype = _check_array(a)
if type(out) == cuda.cudadrv.devicearray.DeviceNDArray:
pass
elif out == None:
pass
else:
raise NotImplementedError
a_dim = a.shape
if a.ndim == 2:
if out is None:
out = cuda.device_array((a_dim[1],a_dim[0]),dtype=out_dtype,order='F')
elif out.shape[0] == a_dim[1] and out.shape[1] == a_dim[0]:
pass
else:
raise NotImplementedError
else:
raise NotImplementedError
self.blas.geam('T','T',a_dim[1],a_dim[0],1.,a,0.,a,out)
return out
def tanh(self, a, out=None):
"""Tanh of input.
Parameters
----------
a : array-like
Array to rectify.
"""
a, out_dtype = _check_array(a)
a_dim = a.shape
if type(out) == cuda.cudadrv.devicearray.DeviceNDArray:
pass
elif out is None:
pass
else:
raise NotImplementedError
if out is None:
out = cuda.device_array(shape=a_dim, dtype=out_dtype, order='F')
elif out.shape == a_dim:
pass
else:
raise ValueError('matrices are not aligned')
if a.ndim == 2:
griddim2 = (int(ceil(a_dim[0]/self.blockdim2[0])),int(ceil(a_dim[1]/self.blockdim2[1])))
tanh_m[griddim2, self.blockdim2, self.stream](a, out)
elif a.ndim == 1:
griddim = int(ceil(a_dim[0]/self.blockdim))
tanh_v[griddim, self.blockdim, self.stream](a, out)
else:
raise NotImplementedError
return out
def monte_carlo_pricer(paths, dt, interest, volatility):
n = paths.shape[0]
mm = MM(shape=n, dtype=np.double, prealloc=5)
blksz = cuda.get_current_device().MAX_THREADS_PER_BLOCK
gridsz = int(math.ceil(float(n) / blksz))
stream = cuda.stream()
prng = curand.PRNG(curand.PRNG.MRG32K3A, stream=stream)
# Allocate device side array
d_normdist = cuda.device_array(n, dtype=np.double, stream=stream)
c0 = interest - 0.5 * volatility**2
c1 = volatility * math.sqrt(dt)
d_last = cuda.to_device(paths[:, 0], to=mm.get())
for j in range(1, paths.shape[1]):
prng.normal(d_normdist, mean=0, sigma=1)
d_paths = cuda.to_device(paths[:, j], stream=stream, to=mm.get())
step(d_last, dt, c0, c1, d_normdist, out=d_paths, stream=stream)
d_paths.copy_to_host(paths[:, j], stream=stream)
mm.free(d_last)
d_last = d_paths
stream.synchronize()
def monte_carlo_pricer(paths, dt, interest, volatility):
n = paths.shape[0]
mm = MM(shape=n, dtype=np.double, prealloc=5)
blksz = cuda.get_current_device().MAX_THREADS_PER_BLOCK
gridsz = int(math.ceil(float(n) / blksz))
stream = cuda.stream()
prng = curand.PRNG(curand.PRNG.MRG32K3A, stream=stream)
# Allocate device side array
d_normdist = cuda.device_array(n, dtype=np.double, stream=stream)
c0 = interest - 0.5 * volatility ** 2
c1 = volatility * math.sqrt(dt)
# Configure the kernel
# Similar to CUDA-C: cu_monte_carlo_pricer<<<gridsz, blksz, 0, stream>>>
step_cfg = step[gridsz, blksz, stream]
d_last = cuda.to_device(paths[:, 0], to=mm.get())
for j in range(1, paths.shape[1]):
prng.normal(d_normdist, mean=0, sigma=1)
d_paths = cuda.to_device(paths[:, j], stream=stream, to=mm.get())
step_cfg(d_last, d_paths, dt, c0, c1, d_normdist)
d_paths.copy_to_host(paths[:, j], stream=stream)
mm.free(d_last, stream=stream)
d_last = d_paths
stream.synchronize()
def __init__(self, shape, dtype, prealloc):
self.device = cuda.get_current_device()
self.freelist = deque()
self.events = {}
for i in range(prealloc):
gpumem = cuda.device_array(shape=shape, dtype=dtype)
self.freelist.append(gpumem)
self.events[gpumem] = cuda.event(timing=False)
def __init__(self, shape, dtype, prealloc):
self.device = cuda.get_current_device()
self.freelist = deque()
self.events = {}
for i in range(prealloc):
gpumem = cuda.device_array(shape=shape, dtype=dtype)
self.freelist.append(gpumem)
self.events[gpumem] = cuda.event(timing=False)
def preScan(out_d, in_d, in_size):
threads_per_block = (BLOCK_SIZE, 1)
nBlocks = int(ceil(in_size / (2 * 1.0 * BLOCK_SIZE)))
number_of_blocks = (nBlocks, 1)
aux_d = cuda.device_array(nBlocks, dtype=np.uint32)
aux_od = cuda.device_array(nBlocks, dtype=np.uint32)
exclusiveScanGPU [number_of_blocks, threads_per_block] (aux_d, out_d, in_d, in_size)
if nBlocks > 1:
preScan(aux_od, aux_d, nBlocks)
else:
aux_od = aux_d
exclusiveCombineGPU [number_of_blocks, threads_per_block] (out_d, aux_od, in_size)
def monte_carlo_pricer(paths, dt, interest, volatility):
n = paths.shape[0]
num_streams = 2
part_width = int(math.ceil(float(n) / num_streams))
partitions = [(0, part_width)]
for i in range(1, num_streams):
begin, end = partitions[i - 1]
begin, end = end, min(end + (end - begin), n)
partitions.append((begin, end))
partlens = [end - begin for begin, end in partitions]
mm = MM(shape=part_width, dtype=np.double, prealloc=10 * num_streams)
device = cuda.get_current_device()
blksz = device.MAX_THREADS_PER_BLOCK
gridszlist = [int(math.ceil(float(partlen) / blksz))
for partlen in partlens]
strmlist = [cuda.stream() for _ in range(num_streams)]
prnglist = [curand.PRNG(curand.PRNG.MRG32K3A, stream=strm)
for strm in strmlist]
# Allocate device side array
d_normlist = [cuda.device_array(partlen, dtype=np.double, stream=strm)
for partlen, strm in zip(partlens, strmlist)]
c0 = interest - 0.5 * volatility ** 2
c1 = volatility * math.sqrt(dt)
# Configure the kernel
# Similar to CUDA-C: cu_monte_carlo_pricer<<<gridsz, blksz, 0, stream>>>
steplist = [cu_step[gridsz, blksz, strm]
for gridsz, strm in zip(gridszlist, strmlist)]
d_lastlist = [cuda.to_device(paths[s:e, 0], to=mm.get(stream=strm))
for (s, e), strm in zip(partitions, strmlist)]
for j in xrange(1, paths.shape[1]):
for prng, d_norm in zip(prnglist, d_normlist):
prng.normal(d_norm, mean=0, sigma=1)
d_pathslist = [cuda.to_device(paths[s:e, j], stream=strm,
to=mm.get(stream=strm))
for (s, e), strm in zip(partitions, strmlist)]
for step, args in zip(steplist, zip(d_lastlist, d_pathslist, d_normlist)):
d_last, d_paths, d_norm = args
step(d_last, d_paths, dt, c0, c1, d_norm)
for d_paths, strm, (s, e) in zip(d_pathslist, strmlist, partitions):
d_paths.copy_to_host(paths[s:e, j], stream=strm)
mm.free(d_last, stream=strm)
d_lastlist = d_pathslist
for strm in strmlist:
strm.synchronize()
def mean(self, a, out=None, axis=None):
"""Average array elements.
Parameters
----------
a : array-like
Array to average.
out : array-like
Result will be stored in this array.
axis : int
1 or 0 for 2D arrays.
"""
a, out_dtype = _check_array(a)
a_dim = a.shape
if a.ndim == 2:
if axis is None:
a_strides = a.strides
d_flat_a = _cu_reshape(a, (np.prod(a_dim),), (a_strides[0],), out_dtype)
out = self.blas.asum(d_flat_a)/float(np.prod(a_dim))
elif axis == 0:
if out is None:
out = cuda.device_array(a_dim[1], dtype=out_dtype, order='F')
elif out.shape[0] == a_dim[1]:
pass
else:
raise ValueError('matrices are not aligned')
griddim = int(ceil(a_dim[1]/self.blockdim))
mean_0[griddim, self.blockdim, self.stream](a, float(a_dim[0]), out)
elif axis == 1:
if out is None:
out = cuda.device_array(a_dim[0], dtype=out_dtype, order='F')
elif out.shape[0] == a_dim[0]:
pass
else:
raise ValueError('matrices are not aligned')
griddim = int(ceil(a_dim[0]/self.blockdim))
mean_1[griddim, self.blockdim, self.stream](a, float(a_dim[1]), out)
elif a.ndim == 1:
out = self.blas.asum(a)/float(np.prod(a_dim))
pass
else:
raise NotImplementedError
return out
def mtranspose(a):
blockDim = (min(32,a.shape[0]),min(32,a.shape[1]))
gridDim = ((((a.shape[0] + blockDim[0]) - 1) / blockDim[0]), (((a.shape[1] + blockDim[1]) - 1) / blockDim[1]))
b = cuda.device_array((a.shape[1],a.shape[0]),dtype='float32')
d_mtranspose[gridDim,blockDim](a,b)
return b
def kern_CUDA_dense(nsteps, dX, rho_inv, int_m, dec_m,
phi, grid_idcs, prog_bar=None):
"""`NVIDIA CUDA cuBLAS <https://developer.nvidia.com/cublas>`_ implementation
of forward-euler integration.
Function requires a working :mod:`numbapro` installation. It is typically slower
compared to :func:`kern_MKL_sparse` but it depends on your hardware.
Args:
nsteps (int): number of integration steps
dX (numpy.array[nsteps]): vector of step-sizes :math:`\\Delta X_i` in g/cm**2
rho_inv (numpy.array[nsteps]): vector of density values :math:`\\frac{1}{\\rho(X_i)}`
int_m (numpy.array): interaction matrix :eq:`int_matrix` in dense or sparse representation
dec_m (numpy.array): decay matrix :eq:`dec_matrix` in dense or sparse representation
phi (numpy.array): initial state vector :math:`\\Phi(X_0)`
prog_bar (object,optional): handle to :class:`ProgressBar` object
Returns:
numpy.array: state vector :math:`\\Phi(X_{nsteps})` after integration
"""
calc_precision = None
if config['CUDA_precision'] == 32:
calc_precision = np.float32
elif config['CUDA_precision'] == 64:
calc_precision = np.float64
else:
raise Exception("kern_CUDA_dense(): Unknown precision specified.")
#=======================================================================
# Setup GPU stuff and upload data to it
#=======================================================================
try:
from numbapro.cudalib.cublas import Blas # @UnresolvedImport
from numbapro import cuda, float32 # @UnresolvedImport
except ImportError:
raise Exception("kern_CUDA_dense(): Numbapro CUDA libaries not " +
"installed.\nCan not use GPU.")
cubl = Blas()
m, n = int_m.shape
stream = cuda.stream()
cu_int_m = cuda.to_device(int_m.astype(calc_precision), stream)
cu_dec_m = cuda.to_device(dec_m.astype(calc_precision), stream)
cu_curr_phi = cuda.to_device(phi.astype(calc_precision), stream)
cu_delta_phi = cuda.device_array(phi.shape, dtype=calc_precision)
for step in xrange(nsteps):
if prog_bar:
prog_bar.update(step)
cubl.gemv(trans='T', m=m, n=n, alpha=float32(1.0), A=cu_int_m,
x=cu_curr_phi, beta=float32(0.0), y=cu_delta_phi)
cubl.gemv(trans='T', m=m, n=n, alpha=float32(rho_inv[step]),
A=cu_dec_m, x=cu_curr_phi, beta=float32(1.0), y=cu_delta_phi)
cubl.axpy(alpha=float32(dX[step]), x=cu_delta_phi, y=cu_curr_phi)
return cu_curr_phi.copy_to_host()
def montecarlo_datamgmt(paths, dt, interest, volatility):
c0 = interest - 0.5 * volatility ** 2
c1 = volatility * np.sqrt(dt)
prng = curand.PRNG(rndtype=curand.PRNG.XORWOW)
d_noises = cuda.device_array(paths.shape[0])
d_curLast = cuda.to_device(paths[:,0]) # Copy first set of stock prices to the GPU
d_curNext = cuda.device_array(paths.shape[0]) # Create an empty array to hold the next set of calculated prices
for j in xrange(1, paths.shape[1]): # for each time step
# Generate gaussian noises for simulation
prng.normal(d_noises, 0., 1.)
# Call the GPU-acclereated step function to calculate the next set of prices
d_curNext = step(d_curLast, dt, c0, c1, d_noises)
# Copy calculated prices to host
d_curNext.copy_to_host(paths[:,j])
# Swap the prices so the "last" prices was the one we just copied
# to the host.
d_curNext, d_curLast = d_curLast, d_curNext
def most_similar(a): assert a.shape[1] == d_vectors.shape[1], "Size Mismatch: (%i,%i), (%i,%i)" %(a.shape[0],a.shape[1],d_vectors.shape[0],d_vectors.shape[1]) blockDim = (1024) gridDim = (((d_vectors.shape[0] + blockDim) - 1) / blockDim) val = cuda.device_array((1,d_vectors.shape[0]),dtype='float32') d_distances[gridDim,blockDim](a,d_vectors,val) _,idx = margmin(val) return inv_vocab[idx]
def test_sort():
in_h = np.empty(NUM_ELEMENTS, dtype=np.uint32) #4, 7, 2, 6, 3, 5, 1, 0
out_h = np.empty(NUM_ELEMENTS, dtype=np.uint32)
for i in range(0, NUM_ELEMENTS):
in_h[i] = NUM_ELEMENTS - i - 1
in_d = cuda.to_device(in_h)
out_d = cuda.device_array(NUM_ELEMENTS, dtype=np.uint32)
temp_d = cuda.device_array(NUM_ELEMENTS, dtype=np.uint32)
tkg1 = time()
for bit_shift in range(0, 32):
tk1 = time()
#radix_sort(in_d, out_d, temp_d, in_h[NUM_ELEMENTS - 1], bit_shift)
preScan(out_d, in_d, NUM_ELEMENTS)
tk2 = time()
#print bit_shift, tk2 - tk1
in_d = out_d
out_d = temp_d
temp_d = in_d
tkg2 = time()
out_d.copy_to_host(out_h)
cuda.synchronize()
# line = ""
# for i in range(0, NUM_ELEMENTS):
# line += " " + str(out_h[i])
#
# print line
in_cpu = [NUM_ELEMENTS - i - 1 for i in range(0, NUM_ELEMENTS)]
tc1 = time()
in_cpu.sort()
tc2 = time()
print "GPU Time = ", tkg2 - tkg1
print "CPU Time = ", tc2 - tc1
def test_sort():
in_h = np.empty(NUM_ELEMENTS, dtype=np.uint32) #4, 7, 2, 6, 3, 5, 1, 0
out_h = np.empty(NUM_ELEMENTS, dtype=np.uint32)
for i in range(0, NUM_ELEMENTS):
in_h[i] = NUM_ELEMENTS - i - 1
in_d = cuda.to_device(in_h)
out_d = cuda.device_array(NUM_ELEMENTS, dtype=np.uint32)
temp_d = cuda.device_array(NUM_ELEMENTS, dtype=np.uint32)
tkg1 = time()
for bit_shift in range(0, 32):
tk1 = time()
#radix_sort(in_d, out_d, temp_d, in_h[NUM_ELEMENTS - 1], bit_shift)
preScan(out_d, in_d, NUM_ELEMENTS)
tk2 = time()
#print bit_shift, tk2 - tk1
in_d = out_d
out_d = temp_d
temp_d = in_d
tkg2 = time()
out_d.copy_to_host(out_h)
cuda.synchronize()
# line = ""
# for i in range(0, NUM_ELEMENTS):
# line += " " + str(out_h[i])
#
# print line
in_cpu = [NUM_ELEMENTS - i -1 for i in range(0, NUM_ELEMENTS)]
tc1 = time()
in_cpu.sort()
tc2 = time()
print "GPU Time = ", tkg2 - tkg1
print "CPU Time = ", tc2 - tc1
def flush(self, metric_opt, supp_opt):
if not self.Vcs:
# Nothing to do
return metric_opt, supp_opt
k = self.k
V = self.V
topk_list = []
nodect = V.shape[0]
numseg = len(self.Vcs)
assert nodect
assert numseg
eachsize = nodect * numseg
D = np.zeros(eachsize, dtype=np.float32)
# Fill buffer for segmented sort
for i, Vc in enumerate(self.Vcs):
D[i * nodect:(i + 1) * nodect] = Vc[:, 0]
# Prepare for GPU segmented sort
dD = cuda.to_device(D)
dI = cuda.device_array((numseg, nodect), dtype=np.uint32)
blksz = 32
init_indices[(divup(dI.shape[0], blksz),
divup(dI.shape[1], blksz)),
(blksz, blksz)](dI)
if numseg == 1:
segments = np.arange(1, dtype=np.int32)
else:
segments = (np.arange(numseg - 1, dtype=np.int32) + 1) * nodect
segmented_sort(dD, dI, cuda.to_device(segments))
for i in range(numseg):
topk = dI[i, -k:].copy_to_host()
topk_list.append(topk)
# Reduce
for topk in topk_list:
# Assume A is huge
metric = np.linalg.norm(V[topk, :]) ** 2
if metric > metric_opt:
metric_opt = metric
supp_opt = topk
# Clear all Vc
self.Vcs.clear()
return metric_opt, supp_opt
def diag(self, a, out=None):
"""Creates vector from diagonal of matrix or
matrix with diagonal from vector.
Parameters
----------
a : array-like
Vector or array from which to take diagonal.
out : array-like, optional
Output array.
"""
a, out_dtype = _check_array(a)
a_dim = a.shape
if a.ndim == 2:
if out is None:
out = cuda.device_array(shape=a_dim[0], dtype=out_dtype, order='F')
elif out.shape[0] == a_dim[0] and out.ndim == 1:
pass
else:
raise ValueError('matrices are not aligned')
griddim = int(ceil(a_dim[0]/self.blockdim))
diag2v[griddim, self.blockdim, self.stream](a, out)
elif a.ndim == 1:
if out is None:
out = cuda.device_array(shape=(a_dim[0],a_dim[0]), dtype=out_dtype, order='F')
elif out.shape == (a_dim[0], a_dim[0]):
pass
else:
raise ValueError('matrices are not aligned')
griddim2 = (int(ceil(a_dim[0]/self.blockdim2[0])), int(ceil(a_dim[0]/self.blockdim2[1])))
diag2m[griddim2, self.blockdim2, self.stream](a, out)
else:
raise NotImplementedError
return out
def monte_carlo_pricer(paths, dt, interest, volatility):
n = paths.shape[0]
blksz = cuda.get_current_device().MAX_THREADS_PER_BLOCK
gridsz = int(math.ceil(float(n) / blksz))
# Instantiate cuRAND PRNG
prng = curand.PRNG(curand.PRNG.MRG32K3A)
# Allocate device side array
d_normdist = cuda.device_array(n, dtype=np.double)
c0 = interest - 0.5 * volatility**2
c1 = volatility * math.sqrt(dt)
# Simulation loop
d_last = cuda.to_device(paths[:, 0])
for j in range(1, paths.shape[1]):
prng.normal(d_normdist, mean=0, sigma=1)
d_paths = cuda.to_device(paths[:, j])
step(d_last, dt, c0, c1, d_normdist, out=d_paths)
d_paths.copy_to_host(paths[:, j])
d_last = d_paths
def monte_carlo_pricer(paths, dt, interest, volatility):
n = paths.shape[0]
blksz = cuda.get_current_device().MAX_THREADS_PER_BLOCK
gridsz = int(math.ceil(float(n) / blksz))
# Instantiate cuRAND PRNG
prng = curand.PRNG(curand.PRNG.MRG32K3A)
# Allocate device side array
d_normdist = cuda.device_array(n, dtype=np.double)
c0 = interest - 0.5 * volatility ** 2
c1 = volatility * math.sqrt(dt)
# Simulation loop
d_last = cuda.to_device(paths[:, 0])
for j in range(1, paths.shape[1]):
prng.normal(d_normdist, mean=0, sigma=1)
d_paths = cuda.to_device(paths[:, j])
step(d_last, dt, c0, c1, d_normdist, out=d_paths)
d_paths.copy_to_host(paths[:, j])
d_last = d_paths
def mc_cuda(paths, dt, interest, volatility):
n = paths.shape[0]
blksz = cuda.get_current_device().MAX_THREADS_PER_BLOCK
gridsz = int(math.ceil(float(n) / blksz))
# instantiate a CUDA stream for queueing async CUDA cmds
stream = cuda.stream()
# instantiate a cuRAND PRNG
prng = curand.PRNG(curand.PRNG.MRG32K3A)
# Allocate device side array
d_normdist = cuda.device_array(n, dtype=np.double, stream=stream)
c0 = interest - 0.5 * volatility ** 2
c1 = volatility * math.sqrt(dt)
# configure the kernel
# similar to CUDA-C: step_cuda<<<gridsz, blksz, 0, stream>>>
step_cfg = step_cuda[gridsz, blksz, stream]
# transfer the initial prices
d_last = cuda.to_device(paths[:, 0], stream=stream)
for j in range(1, paths.shape[1]):
# call cuRAND to populate d_normdist with gaussian noises
prng.normal(d_normdist, mean=0, sigma=1)
# setup memory for new prices
# device_array_like is like empty_like for GPU
d_paths = cuda.device_array_like(paths[:, j], stream=stream)
# invoke step kernel asynchronously
step_cfg(d_last, d_paths, dt, c0, c1, d_normdist)
# transfer memory back to the host
d_paths.copy_to_host(paths[:, j], stream=stream)
d_last = d_paths
# wait for all GPU work to complete
stream.synchronize()
def const(self, shape, value, out=None):
if type(shape) != tuple:
shape = (shape,)
assert len(shape) > 0
if len(shape) > 2:
raise NotImplementedError
if out is None:
out = cuda.device_array(shape=shape, dtype=np.float32, order='F')
if out.shape != shape:
raise ValueError('matrices are not aligned')
out_dim = out.shape
if out.ndim == 2:
griddim2 = (int(ceil(out_dim[0]/self.blockdim2[0])),int(ceil(out_dim[1]/self.blockdim2[1])))
const_m[griddim2, self.blockdim2, self.stream](out, value)
elif out.ndim == 1:
griddim = int(ceil(out_dim[0]/self.blockdim))
const_v[griddim, self.blockdim, self.stream](out, value)
else:
raise NotImplementedError
return out
bitmap[x, y, 1] = int(g * 255.)
bitmap[x, y, 2] = int(b * 255.)
bitmap[x, y, 3] = 255
if __name__ == "__main__":
start = timer()
# Create a container for the pixel RGBA information of our image
bitmap = np.zeros([DIM, DIM, 4], dtype=np.int16)
# Copy to device memory
d_bitmap = cuda.to_device(bitmap)
# Create empty container for our Sphere data on device
d_spheres = cuda.device_array(SPHERES, dtype=Sphere_t)
# Create an empty container of spheres on host, and populate it
# with some random data.
temp_spheres = np.empty(SPHERES, dtype=Sphere_t)
for i in xrange(SPHERES):
temp_spheres[i]['r'] = rnd(1.0)
temp_spheres[i]['g'] = rnd(1.0)
temp_spheres[i]['b'] = rnd(1.0)
temp_spheres[i]['x'] = rnd(DIM) - DIM / 2
temp_spheres[i]['y'] = rnd(DIM) - DIM / 2
temp_spheres[i]['z'] = rnd(DIM) - DIM / 2
temp_spheres[i]['radius'] = rnd(100.0) + 20
if VERBOSE:
sph = temp_spheres[i]
def _update(d):
stream1 = cuda.stream()
stream2 = cuda.stream()
stream3 = cuda.stream()
stream4 = cuda.stream()
step = d['step']
#print "Step: {}".format(step)
"""Calculate the pressure gradient. Two steps are needed for this."""
# Calculate FFT of pressure.
fft(d['field']['p'], d['temp']['fft_p'], stream=stream1)
stream1.synchronize()
#print "FFT pressure: {}".format(d['temp']['fft_p'].copy_to_host())
#pressure_exponent_x = exp(pressure_gradient_exponent(d['k_x'], d['spacing'], stream=stream1), stream=stream1) # This is a constant!!
#pressure_exponent_y = exp(pressure_gradient_exponent(d['k_y'], d['spacing'], stream=stream2), stream=stream2) # This is a constant!!
#print(d['spacing'].shape)
#print(d['k_x'].shape)
ex = cuda.device_array(shape=d['field']['p'].shape)
print(d['k_x'].shape)
print(d['spacing'].shape)
print(d['k_x'].dtype)
print(d['spacing'].dtype)
print(pressure_gradient_exponent(d['k_x'], d['spacing']))
ex = pressure_gradient_exponent(d['k_x'], d['spacing'])#, stream=stream1)
ey = pressure_gradient_exponent(d['k_y'], d['spacing'])#, stream=stream2)
pressure_exponent_x = exp(ex, stream=stream1) # This is a constant!!
pressure_exponent_y = exp(ey, stream=stream2) # This is a constant!!
stream1.synchronize()
stream2.synchronize()
#print ( to_gradient(d['temp']['fft_p'], d['k_x'], d['kappa'], pressure_exponent_x) ).copy_to_host()
"""Calculate the velocity gradient."""
ifft(to_gradient(d['temp']['fft_p'], d['k_x'], d['kappa'], pressure_exponent_x, stream=stream1), d['temp']['d_p_d_x'], stream=stream1)
ifft(to_gradient(d['temp']['fft_p'], d['k_y'], d['kappa'], pressure_exponent_y, stream=stream2), d['temp']['d_p_d_y'], stream=stream2)
#print "Pressure gradient x: {}".format( d['temp']['d_p_d_x'].copy_to_host() )
#print "Pressure gradient y: {}".format( d['temp']['d_p_d_y'].copy_to_host() )
"""Calculate the velocity."""
d['field']['v_x'] = velocity_with_pml(d['field']['v_x'], d['temp']['d_p_d_x'], d['timestep'], d['density'], d['abs_exp']['x'], d['source']['v']['x'][step], stream=stream1)
d['field']['v_y'] = velocity_with_pml(d['field']['v_y'], d['temp']['d_p_d_y'], d['timestep'], d['density'], d['abs_exp']['y'], d['source']['v']['y'][step], stream=stream2)
stream1.synchronize()
stream2.synchronize()
"""Fourier transform of the velocity."""
fft(d['field']['v_x'], d['temp']['fft_v_x'], stream=stream1)
fft(d['field']['v_y'], d['temp']['fft_v_y'], stream=stream2)
stream1.synchronize()
stream2.synchronize()
#print d['temp']['fft_v_y'].copy_to_host()
#print "Velocity x: {}".format(d['field']['v_x'].copy_to_host())
#print "Velocity y: {}".format(d['field']['v_y'].copy_to_host())
#print "Source: {}".format(d['source']['p'][step].copy_to_host())
#print "Source: {}".format(d['source']['p'])
#print "Velocity exponent y: {}".format(velocity_exponent_y.copy_to_host())
stream1.synchronize()
stream2.synchronize()
#stream3.synchronize()
#stream4.synchronize()
velocity_exponent_x = exp(velocity_gradient_exponent(d['k_x'], d['spacing'], stream=stream1), stream=stream1) # This is a constant!!
velocity_exponent_y = exp(velocity_gradient_exponent(d['k_y'], d['spacing'], stream=stream2), stream=stream2) # This is a constant!!
ifft(to_gradient(d['temp']['fft_v_x'], d['k_x'], d['kappa'], velocity_exponent_x, stream=stream1), d['temp']['d_v_d_x'], stream=stream1)
ifft(to_gradient(d['temp']['fft_v_y'], d['k_y'], d['kappa'], velocity_exponent_y, stream=stream2), d['temp']['d_v_d_y'], stream=stream2)
"""And finally the pressure."""
#print len([ d['temp']['p_x'], d['temp']['d_v_d_x'], d['timestep'], d['density'], d['soundspeed'], d['abs_exp']['x'], d['source']['p'][step] ])
#pressure_with_pml( d['temp']['p_x'], d['temp']['d_v_d_x'], d['timestep'], d['density'], d['soundspeed'], d['abs_exp']['x'], d['source']['p'][step] )
#for i in [ d['temp']['p_x'], d['temp']['d_v_d_x'], d['timestep'], d['density'], d['soundspeed'], d['abs_exp']['x'], d['source']['p'][step] ]:
#print i , i.shape
#print i.copy_to_host()
#try:
#print i.dtype
#except AttributeError:
#print 'None'
stream1.synchronize()
stream2.synchronize()
#print "Velocity gradient x: {}".format(d['temp']['d_v_d_x'].copy_to_host())
#print "Velocity gradient y: {}".format(d['temp']['d_v_d_y'].copy_to_host())
#print "Pressure x previous: {}".format(d['temp']['p_x'].copy_to_host())
#print "Pressure y previous: {}".format(d['temp']['p_y'].copy_to_host())
#print "Abs exp x: {}".format( d['abs_exp']['x'].copy_to_host())
#print "Abs exp y: {}".format( d['abs_exp']['y'].copy_to_host())
d['temp']['p_x'] = pressure_with_pml(d['temp']['p_x'], d['temp']['d_v_d_x'], d['timestep'], d['density'], d['soundspeed'], d['abs_exp']['x'], d['source']['p'][step], stream=stream1)
d['temp']['p_y'] = pressure_with_pml(d['temp']['p_y'], d['temp']['d_v_d_y'], d['timestep'], d['density'], d['soundspeed'], d['abs_exp']['y'], d['source']['p'][step], stream=stream2)
stream1.synchronize()
stream2.synchronize()
#try:
#print "Source p: {}".format(d['source']['p'][step].copy_to_host())
#except AttributeError:
#print "Source p: {}".format(d['source']['p'][step])
#print "Pressure x: {}".format(d['temp']['p_x'].copy_to_host())
#print "Pressure y: {}".format(d['temp']['p_y'].copy_to_host())
d['field']['p'] = add(d['temp']['p_x'], d['temp']['p_y'], stream=stream3)
#stream3.synchronize()
#print "Pressure total: {}".format(d['field']['p'].copy_to_host())
stream1.synchronize()
stream2.synchronize()
stream3.synchronize()
return d
def test_apriori():
output_file = open("apriori_out.txt", "w")
offsets, transactions, num_transactions, num_elements = readFile(
"syncthetic_data.txt")
print "Offset = ", offsets[:num_transactions]
print "transactions = ", transactions[:num_elements]
print "Num transactions = ", num_transactions
print "Num elements = ", num_elements
min_support = MIN_SUPPORT
# to find number of max digits required to represent that many number of unique items
power = 1
while MAX_UNIQUE_ITEMS / (10**power) != 0:
power += 1
print "Power = ", power
t = [item for item in transactions.tolist()]
if num_elements > NUM_ELEMENTS:
print "Error: Elements exceeding NUM_ELEMENTS. Exiting..."
sys.exit(12)
input_h = np.array(t, dtype=np.int32)
print "Input transactions = ", list(input_h)
print "Size of transactions = ", input_h.size
ci_h = np.zeros(MAX_UNIQUE_ITEMS, dtype=np.int32)
li_h = np.empty(MAX_UNIQUE_ITEMS, dtype=np.int32)
input_d = cuda.to_device(input_h)
ci_d = cuda.to_device(ci_h)
li_d = cuda.device_array(MAX_UNIQUE_ITEMS, dtype=np.int32)
threads_per_block = (BLOCK_SIZE, 1)
number_of_blocks = (int(ceil(NUM_ELEMENTS / (1.0 * threads_per_block[0]))),
1) #((NUM_ELEMENTS / threads_per_block[0]) + 1, 1)
histogramGPU[number_of_blocks, threads_per_block](input_d, ci_d,
num_elements)
#cuda.synchronize()
ci_d.copy_to_host(ci_h)
print "Ci_H Histogram result = ", ci_h # support count for each item
number_of_blocks = (int(
ceil(MAX_UNIQUE_ITEMS / (1.0 * threads_per_block[0]))), 1)
pruneGPU[number_of_blocks, threads_per_block](ci_d, MAX_UNIQUE_ITEMS,
min_support)
cuda.synchronize()
ci_d.copy_to_host(ci_h)
print "Keys = ", [i for i in range(0, len(ci_h))]
print "Ci_H Pruning result = ", ci_h # support count for each item
# calculate concise list of items satisfying min support
l1_patterns = {}
k = 0 # number of items whose sup_count > min_support
for j in range(0, len(ci_h)):
if ci_h[j] != 0:
li_h[k] = j
l1_patterns[(j, )] = ci_h[j]
k += 1
print "\n=======================================================\n"
print "L1 = ", list(li_h)[:k] #items whose support_count > min_support
print "\n=======================================================\n"
output_file.write(createFormattedPatterns(l1_patterns, 1))
print "K(num_items_with_good_sup_count = ", k
#k = 102
ci_h = np.array([-1 for i in range(0, k**2)], dtype=np.int32)
ci_d = cuda.to_device(ci_h)
#li_h = np.array(sorted([randint(10, 99) for i in range(0, k)]), dtype=np.int32)
#tli_h = np.array([i for i in range(1, k + 1)], dtype=np.int32)
t1 = time()
li_d = cuda.to_device(li_h)
number_of_blocks = (int(ceil(k / (1.0 * MAX_ITEM_PER_SM))), 1)
print "Self join 2 number of blocks = ", number_of_blocks
print "K = ", k
print "Ci_H size = ", ci_h.size
print "LI_H size = ", li_h.size
selfJoinGPU[number_of_blocks, threads_per_block](li_d, ci_d, k, power)
cuda.synchronize()
li_d.copy_to_host(li_h)
ci_d.copy_to_host(ci_h)
t2 = time()
#sys.exit(0)
# f = open('join.txt', 'w')
#
# for i in range(0, k):
# line = ""
# for j in range(0, k):
# line += str(ci_h[k * i + j]) + " "
# f.write(line + "\n")
#
# f.close()
#ci_h = ci_h.reshape(k, k)
print "Initial Mask = ", ci_h.reshape(k, k)
print "Self joining time = ", (t2 - t1)
d_offsets = cuda.to_device(offsets)
d_transactions = cuda.to_device(transactions)
#number_of_blocks = (1, 1) #(int(num_transactions / (1.0 * threads_per_block[0])) + 1, 1)
number_of_blocks = (int(
ceil(num_transactions / (1.0 * MAX_TRANSACTIONS_PER_SM))), 1)
print "Num blocks for findFrequency = ", number_of_blocks
print "Num transactions = ", num_transactions
print "Num patterns = ", k
print "index = ", list(li_h)[:k]
findFrequencyGPU[number_of_blocks,
threads_per_block](d_transactions, d_offsets,
num_transactions, num_elements, li_d,
ci_d, k)
cuda.synchronize()
ci_d.copy_to_host(ci_h)
print "Final Mask = ", ci_h.reshape(k, k)
d_transactions.copy_to_host(transactions)
threads_per_block = (BLOCK_SIZE, BLOCK_SIZE)
number_of_blocks = ((int(ceil(k / (1.0 * threads_per_block[0])))),
(int(ceil(k / (1.0 * threads_per_block[0])))))
pruneMultipleGPU[number_of_blocks, threads_per_block](
ci_d, k, min_support) # prunes according to min_support
ci_d.copy_to_host(ci_h)
print "Outer Mask = ", ci_h.reshape(k, k)
ci_hn = np.zeros(k, dtype=np.int32)
ci_dn = cuda.to_device(ci_hn)
combinationsAvailable[threads_per_block, number_of_blocks](
ci_d, ci_dn, k) #Number of possible patterns in each row
ci_dn.copy_to_host(ci_hn)
print "Ci_hn = ", list(ci_hn)
ci_hnx = np.empty(k, dtype=np.int32)
ci_dnx = cuda.to_device(ci_hnx)
preScan(ci_dnx, ci_dn, k) # Prefix sum on patterns in each row
ci_dnx.copy_to_host(ci_hnx)
num_patterns = ci_hnx[-1]
print "Ci_hnx = ", list(ci_hnx)
sparseM_h = np.empty(ci_hnx[-1] * 3, dtype=np.uint32)
sparseM_d = cuda.to_device(sparseM_h)
threads_per_block = (BLOCK_SIZE, 1)
number_of_blocks = (int(ceil(k / (1.0 * threads_per_block[0]))), 1)
convert2Sparse[threads_per_block,
number_of_blocks](ci_d, ci_dnx, sparseM_d, num_patterns, k)
sparseM_d.copy_to_host(sparseM_h)
# sparseM_h = sparseM_h.reshape(3, num_patterns)
print sparseM_h.reshape(3, num_patterns)
patterns = {}
for i in range(0, num_patterns):
item1 = sparseM_h[i]
item2 = sparseM_h[i + num_patterns]
support = sparseM_h[i + 2 * num_patterns]
patterns[tuple(sorted([li_h[item1], li_h[item2]]))] = support
print "\n=======================================================\n"
print "L2 = ", patterns
print "\n=======================================================\n"
output_file.write(createFormattedPatterns(patterns, 2))
new_modulo_map = {}
index_id = 1
actual_pattern_items = []
index_items_lookup = []
#patterns = {(2, 3, 5) : 1, (2, 3, 6) : 1, (2, 3, 7) : 1, (2, 4, 5) : 1, (2, 4, 7) : 1, (3, 5, 7) : 1}
for pattern in sorted(patterns.keys()):
if pattern[:-1] not in new_modulo_map:
new_modulo_map[pattern[:-1]] = index_id
prev_len = len(actual_pattern_items)
pattern_len = len(pattern[:-1])
actual_pattern_items += pattern[:-1]
index_items_lookup += [index_id, prev_len, pattern_len]
index_id += 1
if (pattern[-1], ) not in new_modulo_map:
new_modulo_map[(pattern[-1], )] = index_id
prev_len = len(actual_pattern_items)
pattern_len = len([pattern[-1]])
actual_pattern_items += [pattern[-1]]
index_items_lookup += [index_id, prev_len, pattern_len]
index_id += 1
#print "Actual pattern items = ", actual_pattern_items
#print "Index lookup = ", index_items_lookup
print new_modulo_map
new_patterns = []
for pattern in patterns:
new_patterns.append(
(new_modulo_map[pattern[:-1]], new_modulo_map[(pattern[-1], )]))
print new_patterns
new_new_pattern = []
for pattern in new_patterns:
new_new_pattern.append(pattern[0] * 10**power + pattern[1])
new_new_pattern.sort()
print new_new_pattern
k = len(new_new_pattern)
li_h = np.array(new_new_pattern, dtype=np.int32)
ci_h = np.array([-1 for i in range(0, k**2)], dtype=np.int32)
ci_d = cuda.to_device(ci_h)
#li_h = np.array(sorted([randint(10, 99) for i in range(0, k)]), dtype=np.int32)
t1 = time()
li_d = cuda.to_device(li_h)
number_of_blocks = (int(ceil(k / (1.0 * MAX_ITEM_PER_SM))), 1)
selfJoinGPU[number_of_blocks, threads_per_block](li_d, ci_d, k, power)
li_d.copy_to_host(li_h)
ci_d.copy_to_host(ci_h)
api_h = np.array(actual_pattern_items, dtype=np.int32)
iil_h = np.array(index_items_lookup, dtype=np.int32)
api_d = cuda.to_device(api_h)
iil_d = cuda.to_device(iil_h)
print "Api_h = ", list(api_h), " Size = ", api_h.size
print "IIL_H = ", list(iil_h), " Size = ", iil_h.size
t2 = time()
print "LI_H = ", li_h
print "Initial Mask = ", ci_h.reshape(k, k)
#number_of_blocks = (1, 1) #(int(num_transactions / (1.0 * threads_per_block[0])) + 1, 1)
number_of_blocks = (int(
ceil(num_transactions / (1.0 * MAX_TRANSACTIONS_PER_SM))), 1)
print "Num transactions = ", num_transactions
print "Num patterns = ", k
print "index = ", li_h
print "Size of api_d = ", api_h.size
print "Size of iil_h = ", iil_h.size
findHigherPatternFrequencyGPU[number_of_blocks,
threads_per_block](d_transactions, d_offsets,
num_transactions,
num_elements, li_d, ci_d,
k, api_d, iil_d, power,
api_h.size, iil_h.size)
cuda.synchronize()
ci_d.copy_to_host(ci_h)
print "Final Mask = ", ci_h.reshape(k, k)
#d_transactions.copy_to_host(transactions)
#print transactions[:num_elements]
threads_per_block = (BLOCK_SIZE, BLOCK_SIZE)
number_of_blocks = ((int(ceil(k / (1.0 * threads_per_block[0])))),
(int(ceil(k / (1.0 * threads_per_block[0])))))
pruneMultipleGPU[number_of_blocks, threads_per_block](ci_d, k, min_support)
ci_d.copy_to_host(ci_h)
print "Outer Mask = ", ci_h.reshape(k, k)
print "K = ", k
ci_hn = np.zeros(k, dtype=np.int32)
ci_dn = cuda.to_device(ci_hn)
combinationsAvailable[threads_per_block, number_of_blocks](ci_d, ci_dn, k)
ci_dn.copy_to_host(ci_hn)
print "Ci_hn = ", list(ci_hn)
ci_hnx = np.empty(k, dtype=np.int32)
ci_dnx = cuda.to_device(ci_hnx)
preScan(ci_dnx, ci_dn, k)
ci_dnx.copy_to_host(ci_hnx)
num_patterns = ci_hnx[-1]
print list(ci_hnx)
sparseM_h = np.empty(ci_hnx[-1] * 3, dtype=np.uint32)
sparseM_d = cuda.to_device(sparseM_h)
threads_per_block = (BLOCK_SIZE, 1)
number_of_blocks = (int(ceil(k / (1.0 * threads_per_block[0]))), 1)
print "K = ", k
convert2Sparse[threads_per_block,
number_of_blocks](ci_d, ci_dnx, sparseM_d, num_patterns, k)
sparseM_d.copy_to_host(sparseM_h)
# sparseM_h = sparseM_h.reshape(3, num_patterns)
print sparseM_h.reshape(3, num_patterns)
patterns = {}
for i in range(0, num_patterns):
item1 = sparseM_h[i]
item2 = sparseM_h[i + num_patterns]
support = sparseM_h[i + 2 * num_patterns]
patterns[tuple(sorted([li_h[item1], li_h[item2]]))] = support
print patterns
actual_patterns = {}
for pattern in patterns:
v_common_pat = pattern[0] / (10**power)
vitem1 = pattern[0] % (10**power)
vitem2 = pattern[1] % (10**power)
item1 = actual_pattern_items[index_items_lookup[(vitem1 - 1) * 3 + 1]]
item2 = actual_pattern_items[index_items_lookup[(vitem2 - 1) * 3 + 1]]
common_pat_start = index_items_lookup[(v_common_pat - 1) * 3 + 1]
common_pat_length = index_items_lookup[(v_common_pat - 1) * 3 + 2]
common_pat_end = common_pat_start + common_pat_length
common_pattern = actual_pattern_items[common_pat_start:common_pat_end]
pattern_key = tuple(common_pattern) + tuple(sorted([item1, item2]))
actual_patterns[pattern_key] = patterns[pattern]
print "\n=======================================================\n"
print "L3 = ", actual_patterns
print "\n=======================================================\n"
output_file.write(createFormattedPatterns(actual_patterns, 3))
output_file.close()
def backward(dY, cache, g_WLSTM):
Wd = cache['Wd']
Hout = cache['Hout']
IFOG = cache['IFOG']
IFOGf = cache['IFOGf']
C = cache['C']
Hin = cache['Hin']
g_Hin = cuda.to_device(np.asfortranarray(Hin.T))
WLSTM = cache['WLSTM']
X = cache['X']
tanhC_version = cache['tanhC_version']
drop_prob_encoder = cache['drop_prob_encoder']
drop_prob_decoder = cache['drop_prob_decoder']
n, d = Hout.shape
# we have to add back a row of zeros, since in the forward pass
# this information was not used. See NOTE1 above.
dY = np.row_stack([np.zeros(dY.shape[1]), dY])
# backprop the decoder
dWd = Hout.transpose().dot(dY)
dbd = np.sum(dY, axis=0, keepdims=True)
dHout = dY.dot(Wd.transpose())
# backprop dropout, if it was applied
if drop_prob_decoder > 0:
dHout *= cache['U2']
# backprop the LSTM
dIFOG = np.array(np.zeros(IFOG.shape), order='F')
dIFOGf = np.zeros(IFOGf.shape)
dWLSTMCp = np.array(np.zeros(WLSTM.shape), order='F')
dWLSTM = cuda.device_array(dWLSTMCp.shape, order='F')
dWLSTM.copy_to_device(dWLSTMCp)
dHin = np.array(np.zeros((1, Hin.shape[1])), order='F')
g_dHin = cuda.device_array((1, Hin.shape[1]), order='F')
dC = np.zeros(C.shape)
dX = np.zeros(X.shape)
for t in reversed(xrange(n)):
if tanhC_version:
tanhCt = np.tanh(C[t]) # recompute this here
dIFOGf[t, 2 * d:3 * d] = tanhCt * dHout[t]
# backprop tanh non-linearity first then continue backprop
dC[t] += (1 - tanhCt**2) * (IFOGf[t, 2 * d:3 * d] * dHout[t])
else:
dIFOGf[t, 2 * d:3 * d] = C[t] * dHout[t]
dC[t] += IFOGf[t, 2 * d:3 * d] * dHout[t]
if t > 0:
dIFOGf[t, d:2 * d] = C[t - 1] * dC[t]
dC[t - 1] += IFOGf[t, d:2 * d] * dC[t]
dIFOGf[t, :d] = IFOGf[t, 3 * d:] * dC[t]
dIFOGf[t, 3 * d:] = IFOGf[t, :d] * dC[t]
# backprop activation functions
dIFOG[t, 3 * d:] = (1 - IFOGf[t, 3 * d:]**2) * dIFOGf[t, 3 * d:]
y = IFOGf[t, :3 * d]
dIFOG[t, :3 * d] = (y * (1.0 - y)) * dIFOGf[t, :3 * d]
# backprop matrix multiply
#dWLSTM += np.outer(Hin[t], dIFOG[t])
#dHin[t] = dIFOG[t].dot(WLSTM.transpose())
g_dIFOG = cuda.to_device(dIFOG[t:t + 1])
g_dHin, dWLSTM = backMultSubroutine(g_Hin[:, t:t + 1], g_WLSTM,
g_dIFOG, dWLSTM, g_dHin)
g_dHin.copy_to_host(dHin)
# backprop the identity transforms into Hin
dX[t] = dHin[0, 1:1 + d]
if t > 0:
dHout[t - 1] += dHin[0, 1 + d:]
if drop_prob_encoder > 0: # backprop encoder dropout
dX *= cache['U']
dWLSTM.copy_to_host(dWLSTMCp)
return {
'WLSTM': dWLSTMCp,
'Wd': dWd,
'bd': dbd,
'dXi': dX[0, :],
'dXs': dX[1:, :]
}
def main(*args):
OPT_N = 4000000
iterations = 10
if len(args) >= 2:
iterations = int(args[0])
blockdim = 1024, 1
griddim = int(math.ceil(float(OPT_N) / blockdim[0])), 1
# Use cuRand to generate random numbers directyl on the gpu
# to avoid memory transfers.
prng = curand.PRNG(rndtype=curand.PRNG.XORWOW)
time0 = time.time()
# malloc
d_stockPrice = cuda.device_array(shape=(OPT_N), dtype=np.float32)
d_optionStrike = cuda.device_array(shape=(OPT_N), dtype=np.float32)
d_optionYears = cuda.device_array(shape=(OPT_N), dtype=np.float32)
# Base distribution
prng.uniform(d_stockPrice)
prng.uniform(d_optionStrike)
prng.uniform(d_optionYears)
stream = cuda.stream()
cfg_distribute = c_distribute[griddim, blockdim, stream]
cfg_distribute(d_stockPrice, 5.0, 30.0)
cfg_distribute(d_optionStrike, 1.0, 100.0)
cfg_distribute(d_optionYears, 0.25, 10.)
stream.synchronize()
callResultNumbapro = np.zeros(OPT_N)
putResultNumbapro = -np.ones(OPT_N)
d_callResult = cuda.to_device(callResultNumbapro, stream)
d_putResult = cuda.to_device(putResultNumbapro, stream)
time1 = time.time()
# Preconfigure the kernel as it's called multiple times in a loop.
cfg_black_scholes_cuda = black_scholes_cuda[griddim, blockdim, stream]
for i in range(iterations):
cfg_black_scholes_cuda(d_callResult, d_putResult, d_stockPrice,
d_optionStrike, d_optionYears, RISKFREE,
VOLATILITY)
d_callResult.to_host(stream)
d_putResult.to_host(stream)
stream.synchronize()
time2 = time.time()
dt = (time1 - time0) * 10 + (time2 - time1)
print("numbapro.cuda time: %f msec" % ((1000 * dt) / iterations))
def monte_carlo_pricer(paths, dt, interest, volatility):
n = paths.shape[0]
num_streams = 2
part_width = int(math.ceil(float(n) / num_streams))
partitions = [(0, part_width)]
for i in range(1, num_streams):
begin, end = partitions[i - 1]
begin, end = end, min(end + (end - begin), n)
partitions.append((begin, end))
partlens = [end - begin for begin, end in partitions]
mm = MM(shape=part_width, dtype=np.double, prealloc=10 * num_streams)
device = cuda.get_current_device()
blksz = device.MAX_THREADS_PER_BLOCK
gridszlist = [
int(math.ceil(float(partlen) / blksz)) for partlen in partlens
]
strmlist = [cuda.stream() for _ in range(num_streams)]
prnglist = [
curand.PRNG(curand.PRNG.MRG32K3A, stream=strm) for strm in strmlist
]
# Allocate device side array
d_normlist = [
cuda.device_array(partlen, dtype=np.double, stream=strm)
for partlen, strm in zip(partlens, strmlist)
]
c0 = interest - 0.5 * volatility**2
c1 = volatility * math.sqrt(dt)
# Configure the kernel
# Similar to CUDA-C: cu_monte_carlo_pricer<<<gridsz, blksz, 0, stream>>>
steplist = [
cu_step[gridsz, blksz, strm]
for gridsz, strm in zip(gridszlist, strmlist)
]
d_lastlist = [
cuda.to_device(paths[s:e, 0], to=mm.get(stream=strm))
for (s, e), strm in zip(partitions, strmlist)
]
for j in xrange(1, paths.shape[1]):
for prng, d_norm in zip(prnglist, d_normlist):
prng.normal(d_norm, mean=0, sigma=1)
d_pathslist = [
cuda.to_device(paths[s:e, j], stream=strm, to=mm.get(stream=strm))
for (s, e), strm in zip(partitions, strmlist)
]
for step, args in zip(steplist, zip(d_lastlist, d_pathslist,
d_normlist)):
d_last, d_paths, d_norm = args
step(d_last, d_paths, dt, c0, c1, d_norm)
for d_paths, strm, (s, e) in zip(d_pathslist, strmlist, partitions):
d_paths.copy_to_host(paths[s:e, j], stream=strm)
mm.free(d_last, stream=strm)
d_lastlist = d_pathslist
for strm in strmlist:
strm.synchronize()
def backward(dY, cache,g_WLSTM):
Wd = cache['Wd']
Hout = cache['Hout']
IFOG = cache['IFOG']
IFOGf = cache['IFOGf']
C = cache['C']
Hin = cache['Hin']
g_Hin = cuda.to_device(np.asfortranarray(Hin.T))
WLSTM = cache['WLSTM']
X = cache['X']
tanhC_version = cache['tanhC_version']
drop_prob_encoder = cache['drop_prob_encoder']
drop_prob_decoder = cache['drop_prob_decoder']
n,d = Hout.shape
# we have to add back a row of zeros, since in the forward pass
# this information was not used. See NOTE1 above.
dY = np.row_stack([np.zeros(dY.shape[1]), dY])
# backprop the decoder
dWd = Hout.transpose().dot(dY)
dbd = np.sum(dY, axis=0, keepdims = True)
dHout = dY.dot(Wd.transpose())
# backprop dropout, if it was applied
if drop_prob_decoder > 0:
dHout *= cache['U2']
# backprop the LSTM
dIFOG = np.array(np.zeros(IFOG.shape),order='F')
dIFOGf = np.zeros(IFOGf.shape)
dWLSTMCp = np.array(np.zeros(WLSTM.shape),order='F')
dWLSTM = cuda.device_array(dWLSTMCp.shape,order='F')
dWLSTM.copy_to_device(dWLSTMCp)
dHin = np.array(np.zeros((1,Hin.shape[1])),order='F')
g_dHin = cuda.device_array((1,Hin.shape[1]),order='F')
dC = np.zeros(C.shape)
dX = np.zeros(X.shape)
for t in reversed(xrange(n)):
if tanhC_version:
tanhCt = np.tanh(C[t]) # recompute this here
dIFOGf[t,2*d:3*d] = tanhCt * dHout[t]
# backprop tanh non-linearity first then continue backprop
dC[t] += (1-tanhCt**2) * (IFOGf[t,2*d:3*d] * dHout[t])
else:
dIFOGf[t,2*d:3*d] = C[t] * dHout[t]
dC[t] += IFOGf[t,2*d:3*d] * dHout[t]
if t > 0:
dIFOGf[t,d:2*d] = C[t-1] * dC[t]
dC[t-1] += IFOGf[t,d:2*d] * dC[t]
dIFOGf[t,:d] = IFOGf[t, 3*d:] * dC[t]
dIFOGf[t, 3*d:] = IFOGf[t,:d] * dC[t]
# backprop activation functions
dIFOG[t,3*d:] = (1 - IFOGf[t, 3*d:] ** 2) * dIFOGf[t,3*d:]
y = IFOGf[t,:3*d]
dIFOG[t,:3*d] = (y*(1.0-y)) * dIFOGf[t,:3*d]
# backprop matrix multiply
#dWLSTM += np.outer(Hin[t], dIFOG[t])
#dHin[t] = dIFOG[t].dot(WLSTM.transpose())
g_dIFOG = cuda.to_device(dIFOG[t:t+1])
g_dHin, dWLSTM = backMultSubroutine(g_Hin[:,t:t+1],g_WLSTM,g_dIFOG,dWLSTM,g_dHin)
g_dHin.copy_to_host(dHin)
# backprop the identity transforms into Hin
dX[t] = dHin[0,1:1+d]
if t > 0:
dHout[t-1] += dHin[0,1+d:]
if drop_prob_encoder > 0: # backprop encoder dropout
dX *= cache['U']
dWLSTM.copy_to_host(dWLSTMCp)
return { 'WLSTM': dWLSTMCp, 'Wd': dWd, 'bd': dbd, 'dXi': dX[0,:], 'dXs': dX[1:,:] }
def add(self, a, b, out = None, alpha = 1., beta = 1.):
"""Pointwise addition of two scalars, 1D, or 2D arrays.
Behaves like numpy array in terms of broadcasting.
Parameters
----------
a : array-like
Array to add.
b : array-like
Array to add.
out : DeviceNDArray (optional)
Result will overwrite out if given.
alpha : float (optional)
Scales a before addition.
beta : float
Scales b before addition.
"""
b, out_dtype = _check_array(b)
a, out_dtype = _check_array(a)
if type(out) == cuda.cudadrv.devicearray.DeviceNDArray:
pass
elif out is None:
pass
else:
raise NotImplementedError
a_dim = a.shape
b_dim = b.shape
# Matrix-matrix addition
if a.ndim == 2 and b.ndim == 2:
# Full-size matricies
if a_dim == b_dim:
if out is None:
out = cuda.device_array((a_dim[0], a_dim[1]), dtype=out_dtype, order='F')
elif out.shape[0] == a_dim[0] and out.shape[1] == a_dim[1]:
pass
else:
raise ValueError('matrices are not aligned')
self.blas.geam('N', 'N', a_dim[0], a_dim[1], alpha, a, beta, b, out)
# np.newaxis matrices
elif a_dim[0] == b_dim[0] and b_dim[1] == 1:
if out is None:
out = cuda.device_array((a_dim[0], a_dim[1]), dtype=out_dtype, order='F')
elif out.shape[0] == a_dim[0] and out.shape[1] == a_dim[1]:
pass
else:
raise ValueError('matrices are not aligned')
blockdim = (32,32)
griddim = (int(ceil(a_dim[0]/blockdim[0])),int(ceil(a_dim[1]/blockdim[1])))
if alpha != 1. or beta != 1.:
m_mn_sadd_pointwise[griddim,blockdim, self.stream](a,b,alpha,beta,out)
else:
m_mn_add_pointwise[griddim,blockdim, self.stream](a,b,out)
elif a_dim[1] == b_dim[1] and b_dim[0] == 1:
if out is None:
out = cuda.device_array((a_dim[0], a_dim[1]), dtype=out_dtype, order='F')
elif out.shape == a_dim:
pass
else:
raise ValueError('matrices are not aligned')
blockdim = (32,32)
griddim = (int(ceil(a_dim[0]/blockdim[0])),int(ceil(a_dim[1]/blockdim[1])))
if alpha != 1. or beta != 1.:
m_nm_sadd_pointwise[griddim,blockdim, self.stream](a,b,alpha,beta,out)
else:
m_nm_add_pointwise[griddim,blockdim, self.stream](a,b,out)
elif b_dim[0] == a_dim[0] and a_dim[1] == 1:
if out is None:
out = cuda.device_array((b_dim[0], b_dim[1]), dtype=out_dtype, order='F')
elif out.shape[0] == a_dim[0] and out.shape[1] == a_dim[1]:
pass
else:
raise ValueError('matrices are not aligned')
blockdim = (32,32)
griddim = (int(ceil(b_dim[0]/blockdim[0])),int(ceil(b_dim[1]/blockdim[1])))
if alpha != 1. or beta != 1.:
m_mn_sadd_pointwise[griddim,blockdim, self.stream](b,a,beta,alpha,out)
else:
m_mn_add_pointwise[griddim,blockdim, self.stream](b,a,out)
elif b_dim[1] == a_dim[1] and a_dim[0] == 1:
if out is None:
out = cuda.device_array((b_dim[0], b_dim[1]), dtype=out_dtype, order='F')
elif out.shape[0] == a_dim[0] and out.shape[1] == a_dim[1]:
pass
else:
raise ValueError('matrices are not aligned')
blockdim = (32,32)
griddim = (int(ceil(b_dim[0]/blockdim[0])),int(ceil(b_dim[1]/blockdim[1])))
if alpha != 1. or beta != 1.:
m_nm_sadd_pointwise[griddim,blockdim, self.stream](b,a,beta,alpha,out)
else:
m_nm_add_pointwise[griddim,blockdim, self.stream](b,a,out)
else:
raise ValueError('matrices are not aligned')
# Vector-vector addition
elif a.ndim == 1 and b.ndim == 1:
if a_dim[0] != b_dim[0]:
raise ValueError('matricies not aligned')
if out is None:
out = cuda.device_array(a_dim[0], dtype=out_dtype, order='F')
elif out.shape[0] == a_dim[0]:
pass
else:
raise ValueError('matrices are not aligned')
blockdim = 32
griddim = int(ceil(a_dim[0]/blockdim))
if alpha != 1. or beta != 1.:
vsadd_pointwise[griddim,blockdim, self.stream](a,b,alpha,beta,out)
else:
vadd_pointwise[griddim,blockdim, self.stream](a,b,out)
# Matrix-scalar addition
elif a.ndim == 2 and b.ndim == 0:
if out is None:
out = cuda.device_array(a_dim, dtype=out_dtype, order='F')
elif out.shape == a_dim:
pass
else:
raise ValueError('matrices are not aligned')
blockdim = (32,32)
griddim = (int(ceil(a_dim[0]/blockdim[0])),int(ceil(a_dim[1]/blockdim[0])))
if alpha != 1. or beta != 1.:
ms_sadd_pointwise[griddim,blockdim, self.stream](a,b,alpha,beta,out)
else:
ms_add_pointwise[griddim,blockdim, self.stream](a,b,out)
# Scalar-matrix addition
elif a.ndim == 0 and b.ndim == 2:
if out is None:
out = cuda.device_array(b_dim, dtype=out_dtype, order='F')
elif out.shape == b_dim:
pass
else:
raise ValueError('matrices are not aligned')
blockdim = (32,32)
griddim = (int(ceil(b_dim[0]/blockdim[0])),int(ceil(b_dim[1]/blockdim[0])))
if alpha != 1. or beta != 1.:
ms_sadd_pointwise[griddim,blockdim, self.stream](b,a,beta,alpha,out)
else:
ms_add_pointwise[griddim,blockdim, self.stream](b,a,out)
# Vector-scalar addition
elif a.ndim == 1 and b.ndim == 0:
if out is None:
out = cuda.device_array(a_dim, dtype=out_dtype, order='F')
elif out.shape == a_dim:
pass
else:
raise ValueError('matrices are not aligned')
blockdim = 32
griddim = int(ceil(a_dim[0]/blockdim))
if alpha != 1. or beta != 1.:
vs_sadd_pointwise[griddim,blockdim, self.stream](a,b,alpha,beta,out)
else:
vs_add_pointwise[griddim,blockdim, self.stream](a,b,out)
# Scalar-vector addition
elif a.ndim == 0 and b.ndim == 1:
if out is None:
out = cuda.device_array(b_dim, dtype=out_dtype, order='F')
elif out.shape == b_dim:
pass
else:
raise ValueError('matrices are not aligned')
blockdim = 32
griddim = int(ceil(b_dim[0]/blockdim))
if alpha != 1. or beta != 1.:
vs_sadd_pointwise[griddim,blockdim, self.stream](b,a,beta,alpha,out)
else:
vs_add_pointwise[griddim,blockdim, self.stream](b,a,out)
# Matrix-vector addition
elif a.ndim == 2 and b.ndim == 1:
if out is None:
out = cuda.device_array(a_dim, dtype=out_dtype, order='F')
elif out.shape == a_dim:
pass
else:
raise ValueError('matrices are not aligned')
blockdim = (32,32)
griddim = (int(ceil(a_dim[0]/blockdim[0])),int(ceil(a_dim[1]/blockdim[0])))
if b.shape[0] == a.shape[0]:
if alpha != 1. or beta != 1.:
mv0_sadd_pointwise[griddim,blockdim, self.stream](a,b,alpha,beta,out)
else:
mv0_add_pointwise[griddim,blockdim, self.stream](a,b,out)
elif b.shape[0] == a.shape[1]:
if alpha != 1. or beta != 1.:
mv1_sadd_pointwise[griddim,blockdim, self.stream](a,b,alpha,beta,out)
else:
mv1_add_pointwise[griddim,blockdim, self.stream](a,b,out)
else:
raise ValueError('matricies are not aligned')
# Vector-matrix addition
elif a.ndim == 1 and b.ndim == 2:
if out is None:
out = cuda.device_array(b_dim, dtype=out_dtype, order='F')
elif out.shape == b_dim:
pass
else:
raise ValueError('matrices are not aligned')
blockdim = (32,32)
griddim = (int(ceil(b_dim[0]/blockdim[0])),int(ceil(b_dim[1]/blockdim[0])))
if a.shape[0] == b.shape[0]:
if alpha != 1. or beta != 1.:
mv0_sadd_pointwise[griddim,blockdim, self.stream](b,a,beta,alpha,out)
else:
mv0_add_pointwise[griddim,blockdim, self.stream](b,a,out)
elif a.shape[0] == b.shape[1]:
if alpha != 1. or beta != 1.:
mv1_sadd_pointwise[griddim,blockdim, self.stream](b,a,beta,alpha,out)
else:
mv1_add_pointwise[griddim,blockdim, self.stream](b,a,out)
else:
raise ValueError('matricies are not aligned')
else:
raise NotImplementedError
return out
def spca_full(Vd, epsilon=0.1, d=3, k=10):
p = Vd.shape[0]
initNumSamples = int(math.ceil((4. / epsilon)**d))
print(initNumSamples)
maxSize = 6400
##actual algorithm
opt_x = np.zeros((p, 1), dtype=float_dtype)
opt_v = -np.inf
# Send Vd to GPU
dVd = cuda.to_device(Vd)
remaining = initNumSamples
custr = cuda.stream()
# sorter = RadixSort(maxcount=Vd.shape[0], dtype=Vd.dtype, stream=custr,
# descending=True)
prng = curand.PRNG(stream=custr)
while remaining:
numSamples = min(remaining, maxSize)
remaining -= numSamples
# Prepare storage for vector A
# print(Vd.dtype)
# print('dA', (Vd.shape[0], numSamples))
# print('dI', (k, numSamples))
dA = cuda.device_array(shape=(Vd.shape[0], numSamples),
order='F',
dtype=Vd.dtype)
dI = cuda.device_array(shape=(Vd.shape[0], numSamples),
dtype=np.uint32,
order='F')
daInorm = cuda.device_array(shape=numSamples, dtype=Vd.dtype)
dC = cuda.device_array(shape=(d, numSamples),
order='F',
dtype=Vd.dtype)
#GENERATE ALL RANDOM SAMPLES BEFORE
# Also do normalization on the device
prng.normal(dC.reshape(dC.size), mean=0, sigma=1)
norm_random_nums[calc_ncta1d(dC.shape[1], 512), 512, custr](dC, d)
#C = dC.copy_to_host()
# Replaces: a = Vd.dot(c)
# XXX: Vd.shape[0] must be within compute capability requirement
# Note: this kernel can be easily scaled due to the use of num of samples
# as the ncta
batch_matmul[numSamples, 512, custr](dVd, dC, dA)
# Replaces: I = np.argsort(a, axis=0)
# Note: the k-selection is dominanting the time
nn = Vd.shape[0]
segments = (np.arange(numSamples - 1, dtype=np.int32) + 1) * nn
blksz = 32
init_indices[(divup(dI.shape[0], blksz), divup(dI.shape[1], blksz)),
(blksz, blksz), custr](dI)
segmented_sort(dA, dI, segments, stream=custr)
# async_dA = dA.bind(custr)
# async_dI = dI.bind(custr)
# selnext = sorter.batch_argselect(dtype=dA.dtype,
# count=dA.shape[0],
# k=k,
# reverse=True)
# for i in range(numSamples):
# dIi = selnext(async_dA[:, i])
# async_dI[:, i].copy_to_device(dIi, stream=custr)
# for i in range(numSamples):
# # radix_argselect(async_dA[:, i], k=k, stream=custr,
# # storeidx=async_dI[:, i])
# dIi = sorter.argselect(k, async_dA[:, i])
# async_dI[:, i].copy_to_device(dIi, stream=custr)
# Replaces: val = np.linalg.norm(a[I[-k:]])
# batch_scatter_norm[calc_ncta1d(numSamples, 512), 512, custr](dA, dI,
# daInorm)
dA = dA.bind(custr)[-k:]
dI = dI.bind(custr)[-k:]
batch_norm[calc_ncta1d(numSamples, 512), 512, custr](dA, daInorm, k)
aInorm = daInorm.copy_to_host(stream=custr)
custr.synchronize()
for i in xrange(numSamples):
val = aInorm[i]
if val > opt_v:
opt_v = val
opt_x.fill(0)
# Only copy what we need
Ik = dI[:, i].copy_to_host()
aIk = dA[:, i].copy_to_host().reshape(k, 1)
opt_x[Ik] = (aIk / val)
# Free allocations
del dA, dI, daInorm, dC
return opt_x
def fista(I, Phi, lambdav, L=None, tol=10e-6, max_iterations=200, display=True, verbose=False):
b = cublas.Blas()
c = cusparse.Sparse()
descr = c.matdescr()
(m, n) = Phi.shape
(m, batch) = I.shape
if L == None:
L = scipy.sparse.linalg.svds(Phi, 1, which='LM', return_singular_vectors=False)
print "Max eigenvalue: ." + str(L)
L = (L**2)*4 # L = svd(Phi) -> eig(2*(Phi.T*Phi))
invL = 1/L
t = 1.
#if sps.issparse(Phi):
# Phi = np.array(Phi.todense())
d_I = cuda.to_device(np.array(I, dtype=np.float32, order='F'))
# d_Phi = cuda.to_device(np.array(Phi, dtype=np.float32, order='F'))
d_Phi = cusparse.csr_matrix(Phi, dtype=np.float32)
d_PhiT = cusparse.csr_matrix(Phi.T, dtype=np.float32) # hack because csrgemm issues with 'T'
# d_Q = cuda.device_array((n, n), dtype=np.float32, order='F')
d_c = cuda.device_array((n, batch), dtype=np.float32, order='F')
d_x = cuda.to_device(np.array(np.zeros((n, batch), dtype=np.float32), order='F'))
d_y = cuda.to_device(np.array(np.zeros((n, batch), dtype=np.float32), order='F'))
d_x2 = cuda.to_device(np.array(np.zeros((n, batch), dtype=np.float32), order='F'))
# Temporary array variables
d_t = cuda.device_array((m, batch), dtype=np.float32, order='F')
d_t2 = cuda.device_array(n*batch, dtype=np.float32, order='F')
#b.gemm('T', 'N', n, n, m, 1, d_Phi, d_Phi, 0, d_Q) # Q = Phi^T * Phi
#b.gemm('T', 'N', n, batch, m, -2, d_Phi, d_I, 0, d_c) # c = -2*Phi^T * y
# c.csrgemm('T', 'N', n, n, m, descr, d_Phi.nnz, d_Phi.data, d_Phi.indptr, d_Phi.indices,
# descr, d_Phi.nnz, d_Phi.data, d_Phi.indptr, d_Phi.indices, descr, d_Q.data, d_Q.indptr, d_Q.indices)
d_Q = c.csrgemm_ez(d_PhiT, d_Phi, transA='N', transB='N')
c.csrmm('T', m, batch, n, d_Phi.nnz, -2, descr, d_Phi.data, d_Phi.indptr, d_Phi.indices,
d_I, m, 0, d_c, n)
blockdim = 32, 32
griddim = int(math.ceil(n/blockdim[0])), int(math.ceil(batch/blockdim[1]))
blockdim_1d = 256
griddim_1d = int(math.ceil(n*batch/blockdim_1d))
start = l2l1obj(b, c, descr, d_I, d_Phi, d_x, d_t, d_t2, lambdav, blockdim_1d, griddim_1d)
obj2 = start
for i in xrange(max_iterations):
# x2 = 2*Q*y + c
# b.symm('L', 'U', n, batch, 2, d_Q, d_y, 0, d_x2)
c.csrmm('N', n, batch, n, d_Q.nnz, 2, descr, d_Q.data, d_Q.indptr, d_Q.indices,
d_y, n, 0, d_x2, n)
b.geam('N', 'N', n, batch, 1, d_c, 1, d_x2, d_x2)
# x2 = y - invL * x2
b.geam('N', 'N', n, batch, 1, d_y, -invL, d_x2, d_x2)
# proxOp()
l1prox[griddim, blockdim](d_x2, invL*lambdav, d_x2)
t2 = (1+math.sqrt(1+4*(t**2)))/2.0
# y = x2 + ((t-1)/t2)*(x2-x)
b.geam('N', 'N', n, batch, 1+(t-1)/t2, d_x2, (1-t)/t2, d_x, d_y)
# x = x2
b.geam('N', 'N', n, batch, 1, d_x2, 0, d_x, d_x)
t = t2
# update objective
obj = obj2
obj2 = l2l1obj(b, c, descr, d_I, d_Phi, d_x2, d_t, d_t2, lambdav, blockdim_1d, griddim_1d)
if verbose:
x2 = d_x2.copy_to_host()
print "L1 Objective: " + str(obj2)
# print "L1 Objective: " + str(lambdav*np.sum(np.abs(x2)) + np.sum((I-Phi.dot(x2))**2))
if np.abs(obj-obj2)/float(obj) < tol:
break
x2 = d_x2.copy_to_host()
if display:
print "FISTA Iterations: " + str(i)
# print "L1 Objective: " + str(obj2)
print "L1 Objective: " + str(lambdav*np.sum(np.abs(x2)) + np.sum((I-Phi.dot(x2))**2))
print "Objective delta: " + str(obj2-start)
return x2
pricePath = []
for j in range(paths):
print "Generating path: %s" % j
# plotting lists
LogReturns, nLogReturns = [0], [0] # log returns, normalized log returns
xchange, xcorrelation = [], [] # change in price P, and autocorrelation
activeTraders = [] # number of active traders
prices = [initialPrice]
price = initialPrice
for i in range(steps):
# Allocate device side array
enterProbs = cuda.device_array(w*h, dtype=np.double, stream=stream)
activateProbs = cuda.device_array(w*h, dtype=np.double, stream=stream)
choiceProbs = cuda.device_array(w*h, dtype=np.double, stream=stream)
diffuseProbs = cuda.device_array(w*h, dtype=np.double, stream=stream)
#calculate cluster info
cluster, clusterSize, nClust, nClustOnes = calcCluster(A) # get cluster info
xis = cuda.device_array(nClust, dtype=np.double, stream = stream)
eta = cuda.device_array(w*h, dtype=np.double, stream = stream) # 1 -> w*h*w*h, how to index???
with stream.auto_synchronize():
dA = cuda.to_device(A, stream) #upldate grid
dB = cuda.to_device(B, stream) #upload new locatoin
dCluster = cuda.to_device(cluster, stream) #upload cluster grid to GPU
def score_sequence(seq, pssm, verbose = False, keep_strands = True, benchmark = False, blocks_per_grid = -1, threads_per_block = -1):
"""
This function will score a sequence of nucleotides based on a PSSM by using
a sliding window parallelized on a GPU.
Args:
seq: This must be an integer representation of the nucleotide sequence,
where the alphabet is (A = 0, C = 1, G = 2, T = 3). It must be a
vector (1D array) of integers that can be cast to int32 (See:
numpy.int32).
pssm: This must a vectorized PSSM where every four elements correspond
to one position. Make sure this can be cast to an array of float64.
verbose: Set this to True to print performance information.
benchmark: If set to True, the function will return information about
the run in a dictionary at the third output variable.
keep_strands: Whether memory should be allocated for storing which
strand the scores come from. Set this to False if you just want the
scores and the strands array will not be returned.
NOTE: If this and benchmark are set to False, then the scores will
not be returned in a tuple, meaning:
>>> score_sequence
blocks_per_grid: This is the blocks per grid that will be assigned to
the CUDA kernel. See this SO question for info on choosing this
value: http://stackoverflow.com/questions/4391162/cuda-determining-threads-per-block-blocks-per-grid
It defaults to the length of the sequence or the maximum number of
blocks per grid supported by the GPU, whichever is lower.
Set this to a negative number
threads_per_block: Threads per block. See above. It defaults to 55% of
the maximum number of threads per block supported by the GPU, a
value determined experimentally. Higher values will likely result
in failure to allocate resources to the kernel (since there will
not be enough register space for each thread).
Returns:
scores: 1D float64 array of length (n - w + 1), where n is the length
of the sequence and w is the window size. The value at index i of
this array corresponds to the score of the n-mer at position i in
the sequence.
strands: 1D int32 array of length (n - w + 1). The value at position i
is either 0 or 1 corresponding to the strand of the score at that
position where 0 means the forward strand and 1 means reverse.
run_info: This is a dictionary that is returned if the benchmark
parameter is set to True. It contains the following:
>>> run_info.keys()
['memory_used', 'genome_size', 'runtime', 'threads_per_block', 'blocks_per_grid']
Note that the memory_used is rather misleading if running the
function more than once. CUDA is optimized to not transfer the same
data from the host to the device so it will not always change. It
may also unload other assets from memory, so the memory changed can
be negative.
TODO: Find a better method of calculating memory usage.
Example:
>>> pssm = np.random.uniform(-7.5, 2.0, 4 * 16) # Window size of 16
>>> seq = np.random.randint(0, 3, 30e6) # Generate random 30 million bp sequence
>>> scores, strands, run_info = score_sequence(seq, pssm, benchmark=True, verbose=True)
Threads per block = 563
Blocks per grid = 53286
Total threads = 30000018
Scoring... Done.
Genome size: 3e+07 bp
Time: 605.78 ms
Speed: 4.95229e+07 bp/sec
>>> scores
array([-16.97089798, -33.48925866, -21.80381526, ..., -10.27919401,
-32.64575614, -23.97110103])
>>> strands
array([1, 1, 1, ..., 1, 1, 0])
>>> run_info
{'memory_used': 426508288L, 'genome_size': 30000000, 'runtime': 0.28268090518054123, 'threads_per_block': 563, 'blocks_per_grid': 53286}
A more interesting interpretation of the run information for performance
analysis is the number of bases score per second:
>>> print "%g bases/sec" % run_info["genome_size"] / run_info["runtime"]
1.06127e+08 bases/sec
"""
w = int(pssm.size / 4) # width of PSSM
n = int(seq.size) # length of the sequence being scored
# Calculate the reverse-complement of the PSSM
pssm_r = np.array([pssm[i / 4 + (3 - (i % 4))] for i in range(pssm.size)][::-1])
# Calculate the appropriate threads per block and blocks per grid
if threads_per_block <= 0 or blocks_per_grid <= 0:
# We don't use the max number of threads to avoid running out of
# register space by saturating the streaming multiprocessors
# ~55% was found empirically, but your mileage may vary with different GPUs
threads_per_block = int(cuda.get_current_device().MAX_BLOCK_DIM_X * 0.55)
# We saturate our grid and let the dynamic scheduler assign the blocks
# to the discrete CUDA cores/streaming multiprocessors
blocks_per_grid = int(math.ceil(float(n) / threads_per_block))
if blocks_per_grid > cuda.get_current_device().MAX_GRID_DIM_X:
blocks_per_grid = cuda.get_current_device().MAX_GRID_DIM_X
if verbose:
print "Threads per block = %d" % threads_per_block
print "Blocks per grid = %d" % blocks_per_grid
print "Total threads = %d" % (threads_per_block * blocks_per_grid)
# Collect benchmarking info
s = default_timer()
start_mem = cuda.current_context().get_memory_info()[0]
# Start a stream
stream = cuda.stream()
# Copy data to device
d_pssm = cuda.to_device(pssm.astype(np.float64), stream)
d_pssm_r = cuda.to_device(pssm_r.astype(np.float64), stream)
d_seq = cuda.to_device(seq.astype(np.int32), stream)
# Allocate memory on device to store results
d_scores = cuda.device_array(n - w + 1, dtype=np.float64, stream=stream)
if keep_strands:
d_strands = cuda.device_array(n - w + 1, dtype=np.int32, stream=stream)
# Run the kernel
if keep_strands:
cuda_score[blocks_per_grid, threads_per_block](d_pssm, d_pssm_r, d_seq, d_scores, d_strands)
else:
cuda_score_without_strands[blocks_per_grid, threads_per_block](d_pssm, d_pssm_r, d_seq, d_scores)
# Copy results back to host
scores = d_scores.copy_to_host(stream=stream)
if keep_strands:
strands = d_strands.copy_to_host(stream=stream)
stream.synchronize()
# Collect benchmarking info
end_mem = cuda.current_context().get_memory_info()[0]
t = default_timer() - s
# Output info on the run if verbose parameter is true
if verbose:
print "Genome size: %g bp" % n
print "Time: %.2f ms (using time.%s())" % (t * 1000, default_timer.__name__)
print "Speed: %g bp/sec" % (n / t)
print "Global memory: %d bytes used (%.2f%% of total)" % \
(start_mem - end_mem, float(start_mem - end_mem) * 100 / cuda.get_current_device().get_context().get_memory_info()[1])
# Return the run information for benchmarking
run_info = {"genome_size": n, "runtime": t, "memory_used": start_mem - end_mem, \
"blocks_per_grid": blocks_per_grid, "threads_per_block": threads_per_block}
# I'm so sorry BDFL, please don't hunt me down for returning different size
# tuples in my function
if keep_strands:
if benchmark:
return (scores, strands, run_info)
else:
return (scores, strands)
else:
if benchmark:
return (scores, run_info)
else:
# Careful! This won't return a tuple, so you don't need to do
# score_sequence[0] to get the scores
return scores
def mult(self, a, b, out=None, alpha=None):
"""Pointwise multiplication of two 1D or 2D arrays.
Parameters
----------
a : array-like
Array to multiply.
b : array-like
Array to multiply.
out : DeviceNDArray (optional)
Result will overwrite out if given.
alpha : float
Additional scale factor for multiplication.
"""
if alpha is not None:
raise NotImplementedError
b, out_dtype = _check_array(b)
a, out_dtype = _check_array(a)
if type(out) == cuda.cudadrv.devicearray.DeviceNDArray:
pass
elif out is None:
pass
else:
raise NotImplementedError
if b.dtype == np.float32:
pass
else:
raise NotImplementedError
a_dim = a.shape
b_dim = b.shape
if a.ndim == 2 and b.ndim == 2:
if a_dim[0] != b_dim[0] and a_dim[1] != b_dim[1]:
raise ValueError('matrices are not aligned')
if out is None:
out = cuda.device_array((a_dim[0], a_dim[1]), dtype=out_dtype, order='F')
elif out.shape[0] == a_dim[0] and out.shape[1] == a_dim[1]:
pass
else:
raise ValueError('matrices are not aligned')
blockdim2 = (32,32)
griddim2 = (int(ceil(a_dim[0]/blockdim2[0])),int(ceil(a_dim[1]/blockdim2[1])))
mmultiply_pointwise[griddim2,blockdim2, self.stream](a,b,out)
elif a.ndim == 1 and b.ndim == 1:
if a_dim[0] != b_dim[0]:
raise ValueError('matricies not aligned')
if out is None:
out = cuda.device_array(a_dim[0], dtype=out_dtype, order='F')
elif out.shape[0] == a_dim[0]:
pass
else:
raise ValueError('matrices are not aligned')
blockdim = 32
griddim = int(ceil(a_dim[0]/blockdim))
vmultiply_pointwise[griddim,blockdim, self.stream](a,b,out)
else:
raise NotImplementedError
return out
def fista(I,
Phi,
lambdav,
L=None,
tol=10e-6,
max_iterations=200,
display=True,
verbose=False):
"""
I: Images
Phi: Dictionary
lambdav: Sparse Penalty
L = Largest eigenvalue of Phi
"""
b = numbapro.cudalib.cublas.Blas()
(m, n) = Phi.shape
(m, batch) = I.shape
if L == None:
L = scipy.sparse.linalg.svds(Phi,
1,
which='LM',
return_singular_vectors=False)
print "Max eigenvalue: ." + str(L)
L = (L**2) * 2 # L = svd(Phi) -> eig(2*(Phi.T*Phi))
invL = 1 / L
t = 1.
if sps.issparse(Phi):
Phi = np.array(Phi.todense())
d_I = cuda.to_device(np.array(I, dtype=np.float32, order='F'))
d_Phi = cuda.to_device(np.array(Phi, dtype=np.float32, order='F'))
d_Q = cuda.device_array((n, n), dtype=np.float32, order='F')
d_c = cuda.device_array((n, batch), dtype=np.float32, order='F')
d_x = cuda.to_device(
np.array(np.zeros((n, batch), dtype=np.float32), order='F'))
d_y = cuda.to_device(
np.array(np.zeros((n, batch), dtype=np.float32), order='F'))
d_x2 = cuda.to_device(
np.array(np.zeros((n, batch), dtype=np.float32), order='F'))
# Temporary array variables
d_t = cuda.device_array((m, batch), dtype=np.float32, order='F')
d_t2 = cuda.device_array(n * batch, dtype=np.float32, order='F')
b.gemm('T', 'N', n, n, m, 1, d_Phi, d_Phi, 0, d_Q) # Q = Phi^T * Phi
b.gemm('T', 'N', n, batch, m, -2, d_Phi, d_I, 0, d_c) # c = -2*Phi^T * y
blockdim = 32, 32
griddim = int(math.ceil(n / blockdim[0])), int(
math.ceil(batch / blockdim[1]))
blockdim_1d = 256
griddim_1d = int(math.ceil(n * batch / blockdim_1d))
start = l2l1obj(b, d_I, d_Phi, d_x, d_t, d_t2, lambdav, blockdim_1d,
griddim_1d)
obj2 = start
for i in xrange(max_iterations):
# x2 = 2*Q*y + c
b.symm('L', 'U', n, batch, 2, d_Q, d_y, 0, d_x2)
b.geam('N', 'N', n, batch, 1, d_c, 1, d_x2, d_x2)
# x2 = y - invL * x2
b.geam('N', 'N', n, batch, 1, d_y, -invL, d_x2, d_x2)
# proxOp()
l1prox[griddim, blockdim](d_x2, invL * lambdav, d_x2)
t2 = (1 + math.sqrt(1 + 4 * (t**2))) / 2.0
# y = x2 + ((t-1)/t2)*(x2-x)
b.geam('N', 'N', n, batch, 1 + (t - 1) / t2, d_x2, (1 - t) / t2, d_x,
d_y)
# x = x2
b.geam('N', 'N', n, batch, 1, d_x2, 0, d_x, d_x)
t = t2
# update objective
obj = obj2
obj2 = l2l1obj(b, d_I, d_Phi, d_x2, d_t, d_t2, lambdav, blockdim_1d,
griddim_1d)
if verbose:
x2 = d_x2.copy_to_host()
print "L1 Objective: " + str(obj2)
if np.abs(obj - obj2) / float(obj) < tol:
break
x2 = d_x2.copy_to_host()
if display:
print "FISTA Iterations: " + str(i)
print "L1 Objective: " + str(lambdav * np.sum(np.abs(x2)) +
np.sum((I - Phi.dot(x2))**2))
print "Objective delta: " + str(obj2 - start)
return x2
from numbapro import cuda
from PIL import Image
@cuda.jit("void(float32[:], float32[:])", target="gpu")
def blur(input_img, blurred_img):
index = cuda.grid(1)
if(index >= input_img.shape[0]):
return
blurred_img[index] = 4.0
if __name__ == "__main__":
img = np.ones(100)
blurred_img = np.zeros(100)
d_input_img = cuda.to_device(img)
d_blurred_img = cuda.device_array(img.shape[0])
threads_per_block = 256
n_blocks = (img.shape[0] + threads_per_block-1) / threads_per_block
for num in blurred_img:
print num
blur[n_blocks,threads_per_block](d_input_img, d_blurred_img)
print("####################")
d_blurred_img.copy_to_host(blurred_img)
for num in blurred_img:
print num
print("Finished")
def spca(Vd, epsilon=0.1, d=3, k=10):
p = Vd.shape[0]
initNumSamples = int((4. / epsilon) ** d)
maxSize = 32000
##actual algorithm
opt_x = np.zeros((p, 1))
opt_v = -np.inf
# Send Vd to GPU
dVd = cuda.to_device(Vd)
remaining = initNumSamples
custr = cuda.stream()
prng = curand.PRNG(stream=custr)
while remaining:
numSamples = min(remaining, maxSize)
remaining -= numSamples
# Prepare storage for vector A
dA = cuda.device_array(shape=(Vd.shape[0], numSamples), order='F')
dI = cuda.device_array(shape=(k, numSamples), dtype=np.int16, order='F')
daInorm = cuda.device_array(shape=numSamples, dtype=np.float64)
dC = cuda.device_array(shape=(d, numSamples), order='F')
#GENERATE ALL RANDOM SAMPLES BEFORE
# Also do normalization on the device
prng.normal(dC.reshape(dC.size), mean=0, sigma=1)
norm_random_nums[calc_ncta1d(dC.shape[1], 512), 512, custr](dC, d)
#C = dC.copy_to_host()
# Replaces: a = Vd.dot(c)
# XXX: Vd.shape[0] must be within compute capability requirement
# Note: this kernel can be easily scaled due to the use of num of samples
# as the ncta
batch_matmul[numSamples, 512, custr](dVd, dC, dA)
# Replaces: I = np.argsort(a, axis=0)
# Note: the k-selection is dominanting the time
batch_k_selection[numSamples, Vd.shape[0], custr](dA, dI, k)
# Replaces: val = np.linalg.norm(a[I[-k:]])
batch_scatter_norm[calc_ncta1d(numSamples, 512), 512, custr](dA, dI,
daInorm)
aInorm = daInorm.copy_to_host(stream=custr)
custr.synchronize()
for i in xrange(numSamples):
val = aInorm[i]
if val > opt_v:
opt_v = val
opt_x.fill(0)
# Only copy what we need
a = gpu_slice(dA, i).reshape(p, 1)
Ik = gpu_slice(dI, i).reshape(k, 1)
aIk = a[Ik]
opt_x[Ik] = (aIk / val)
# Free allocations
del dA, dI, daInorm, dC
return opt_x
def fista(I, Phi, lambdav, L=None, tol=10e-6, max_iterations=200, display=True, verbose=False):
"""
I: Images
Phi: Dictionary
lambdav: Sparse Penalty
L = Largest eigenvalue of Phi
"""
b = numbapro.cudalib.cublas.Blas()
(m, n) = Phi.shape
(m, batch) = I.shape
if L == None:
L = scipy.sparse.linalg.svds(Phi, 1, which='LM', return_singular_vectors=False)
print "Max eigenvalue: ." + str(L)
L = (L**2)*2 # L = svd(Phi) -> eig(2*(Phi.T*Phi))
invL = 1/L
t = 1.
if sps.issparse(Phi):
Phi = np.array(Phi.todense())
d_I = cuda.to_device(np.array(I, dtype=np.float32, order='F'))
d_Phi = cuda.to_device(np.array(Phi, dtype=np.float32, order='F'))
d_Q = cuda.device_array((n, n), dtype=np.float32, order='F')
d_c = cuda.device_array((n, batch), dtype=np.float32, order='F')
d_x = cuda.to_device(np.array(np.zeros((n, batch), dtype=np.float32), order='F'))
d_y = cuda.to_device(np.array(np.zeros((n, batch), dtype=np.float32), order='F'))
d_x2 = cuda.to_device(np.array(np.zeros((n, batch), dtype=np.float32), order='F'))
# Temporary array variables
d_t = cuda.device_array((m, batch), dtype=np.float32, order='F')
d_t2 = cuda.device_array(n*batch, dtype=np.float32, order='F')
b.gemm('T', 'N', n, n, m, 1, d_Phi, d_Phi, 0, d_Q) # Q = Phi^T * Phi
b.gemm('T', 'N', n, batch, m, -2, d_Phi, d_I, 0, d_c) # c = -2*Phi^T * y
blockdim = 32, 32
griddim = int(math.ceil(n/blockdim[0])), int(math.ceil(batch/blockdim[1]))
blockdim_1d = 256
griddim_1d = int(math.ceil(n*batch/blockdim_1d))
start = l2l1obj(b, d_I, d_Phi, d_x, d_t, d_t2, lambdav, blockdim_1d, griddim_1d)
obj2 = start
for i in xrange(max_iterations):
# x2 = 2*Q*y + c
b.symm('L', 'U', n, batch, 2, d_Q, d_y, 0, d_x2)
b.geam('N', 'N', n, batch, 1, d_c, 1, d_x2, d_x2)
# x2 = y - invL * x2
b.geam('N', 'N', n, batch, 1, d_y, -invL, d_x2, d_x2)
# proxOp()
l1prox[griddim, blockdim](d_x2, invL*lambdav, d_x2)
t2 = (1+math.sqrt(1+4*(t**2)))/2.0
# y = x2 + ((t-1)/t2)*(x2-x)
b.geam('N', 'N', n, batch, 1+(t-1)/t2, d_x2, (1-t)/t2, d_x, d_y)
# x = x2
b.geam('N', 'N', n, batch, 1, d_x2, 0, d_x, d_x)
t = t2
# update objective
obj = obj2
obj2 = l2l1obj(b, d_I, d_Phi, d_x2, d_t, d_t2, lambdav, blockdim_1d, griddim_1d)
if verbose:
x2 = d_x2.copy_to_host()
print "L1 Objective: " + str(obj2)
if np.abs(obj-obj2)/float(obj) < tol:
break
x2 = d_x2.copy_to_host()
if display:
print "FISTA Iterations: " + str(i)
print "L1 Objective: " + str(lambdav*np.sum(np.abs(x2)) + np.sum((I-Phi.dot(x2))**2))
print "Objective delta: " + str(obj2-start)
return x2
def test_sort():
in_h = np.empty(NUM_ELEMENTS, dtype=np.uint32) #4, 7, 2, 6, 3, 5, 1, 0
#in_h = np.array([4, 7, 2, 6, 3, 5, 1, 0], dtype=np.uint32)
out_h = np.empty(NUM_ELEMENTS, dtype=np.uint32)
for i in range(0, NUM_ELEMENTS):
in_h[i] = randint(0, 100) #NUM_ELEMENTS - i - 1
#in_h = np.array([6, 44, 71, 79, 94, 92, 12, 56, 47, 17, 81, 98, 84, 9, 85, 99], dtype=np.uint32)
#in_h = np.array([85, 37, 50, 73, 51, 46, 62, 84, 65, 99, 76, 59, 73, 16, 27, 4, 75, 81, 80, 33, 73, 11, 29, 24, 81, 49, 27, 71, 74, 64, 60, 91], dtype=np.uint32)
print in_h
in_d = cuda.to_device(in_h)
out_d = cuda.device_array(NUM_ELEMENTS, dtype=np.uint32)
tkg1 = time()
threads_per_block = (BLOCK_SIZE, 1)
number_of_blocks = (int(
ceil(NUM_ELEMENTS / (2 * 1.0 * threads_per_block[0]))), 1)
RadixGPU[number_of_blocks, threads_per_block](in_d, out_d, NUM_ELEMENTS)
out_d.copy_to_host(out_h)
#print "Rad = ", list(out_h)
stride = 4
# while stride < NUM_ELEMENTS:
# number_of_blocks = (int(ceil(NUM_ELEMENTS / (stride * 1.0 * threads_per_block[0]))), 1)
# bitonicSort [number_of_blocks, threads_per_block] (out_d, NUM_ELEMENTS, stride)
# stride *= 2
# # number_of_blocks = (int(ceil(NUM_ELEMENTS / (2 * 1.0 * threads_per_block[0]))), 1)
# # RadixGPU [number_of_blocks, threads_per_block] (out_d, in_d, NUM_ELEMENTS)
# # out_d = in_d
# out_d.copy_to_host(out_h)
# print "Str = ", list(out_h)
# break
# # stride /= 2
# while stride >= 4:
# number_of_blocks = (int(ceil(NUM_ELEMENTS / (stride * 1.0 * threads_per_block[0]))), 1)
# bitonicSort [number_of_blocks, threads_per_block] (out_d, NUM_ELEMENTS, stride)
# stride /= 2
# cuda.synchronize()
#
# number_of_blocks = (int(ceil(NUM_ELEMENTS / (2 * 1.0 * threads_per_block[0]))), 1)
# RadixGPU [number_of_blocks, threads_per_block] (out_d, in_d, NUM_ELEMENTS)
# out_d = in_d
#
# out_d.copy_to_host(out_h)
# cuda.synchronize()
#
# line = ""
# for i in range(0, NUM_ELEMENTS):
# line += " " + str(out_h[i])
#
# print line
tkg2 = time()
out_d.copy_to_host(out_h)
cuda.synchronize()
#print "GPU = ", list(out_h)
# line = ""
# for i in range(0, NUM_ELEMENTS):
# line += " " + str(out_h[i])
#
# print line
in_cpu = list(in_h) #[NUM_ELEMENTS - i -1 for i in range(0, NUM_ELEMENTS)]
tc1 = time()
in_cpu.sort()
#print "CPU = ", in_cpu
tc2 = time()
print "GPU Time = ", tkg2 - tkg1
print "CPU Time = ", tc2 - tc1
print len(in_cpu)
def dot(self, a, b, out=None):
"""Takes the dot product of two 2D arrays or 1D vectors.
Checks array type and shape. Should behave like numpy.dot(a, b).
Parameters
----------
a : array-like
Numpy or DeviceNDArray
b : array-like
Numpy or DeviceNDArray
out : DeviceNDArray (optional)
Array will be filled with result if given.
"""
b, out_dtype = _check_array(b)
a, out_dtype = _check_array(a)
if isinstance(out, cuda.cudadrv.devicearray.DeviceNDArray):
pass
elif out is None:
pass
else:
raise NotImplementedError
if b.dtype == np.float32:
pass
else:
raise NotImplementedError
a_dim = a.shape
b_dim = b.shape
if a.ndim == 2 and b.ndim == 2:
if a_dim[1] != b_dim[0]:
raise ValueError('matrices are not aligned')
if out is None:
out = cuda.device_array((a_dim[0], b_dim[1]), dtype=out_dtype, order='F')
elif out.shape[0] == a_dim[0] and out.shape[1] == b_dim[1]:
pass
else:
raise ValueError('matrices are not aligned')
self.blas.gemm('N', 'N', a_dim[0], b_dim[1], a_dim[1], 1., a, b, 0., out)
elif a.ndim == 2 and b.ndim == 1:
if a_dim[1] != b_dim[0]:
raise ValueError('matrices are not aligned')
if out is None:
out = cuda.device_array((a_dim[0]), dtype=out_dtype, order='F')
elif out.shape[0] == a_dim[0]:
pass
else:
raise ValueError('matrices are not aligned')
self.blas.gemv('N', a_dim[0], a_dim[1], 1., a, b, 0., out)
elif a.ndim == 1 and b.ndim == 2:
if a_dim[0] != b_dim[0]:
raise ValueError('matrices are not aligned')
if out is None:
out = cuda.device_array((b_dim[1]), dtype=out_dtype, order='F')
elif out.shape[0] == b_dim[1]:
pass
else:
raise ValueError('matrices are not aligned')
self.blas.gemv('T', b_dim[0], b_dim[1], 1., b, a, 0., out)
elif a.ndim == 1 and b.ndim == 1:
if a_dim[0] != b_dim[0]:
raise ValueError('matricies not aligned')
out = self.blas.dot(a,b)
else:
raise NotImplementedError
return out