def TranslateData(self, batch, i):
"""Applies translations to data at index i in batch."""
sizeX = self.sizeX
sizex = self.sizex
batchsize = batch[i].shape[1]
shift = (sizeX - sizex) / 2
offset_x = np.array([
random.choice(self.translate_range_x) + shift
for k in range(batchsize)
]).reshape(1, -1)
offset_y = np.array([
random.choice(self.translate_range_y) + shift
for k in range(batchsize)
]).reshape(1, -1)
num_channels = self.num_channels
d = batch[i]
if self.offset_x is None:
self.offset_x = cm.CUDAMatrix(offset_x)
else:
self.offset_x.overwrite(offset_x)
if self.offset_y is None:
self.offset_y = cm.CUDAMatrix(offset_y)
else:
self.offset_y.overwrite(offset_y)
if self.translated_d is None or self.translated_d.shape[1] != batchsize:
self.translated_d = cm.empty((sizex**2 * num_channels, batchsize))
d.generate_translations(sizeX,
sizex,
self.offset_x,
self.offset_y,
target=self.translated_d)
batch[i] = self.translated_d
def SetDataStats(self, i, stats_file):
"""Load stats for normalizing the data."""
return
assert os.path.exists(
stats_file), 'Stats file %s not found.' % stats_file
#print("Here is the stats file "+stats_file)
stats = np.load(stats_file)
self.normalize[i] = True
self.means[i] = cm.CUDAMatrix(stats['mean'].reshape(-1, 1))
self.stds[i] = cm.CUDAMatrix(1e-10 + stats['std'].reshape(-1, 1))
return
def ShuffleData(self):
"""In-place shuffle the data in self.data."""
indices = np.arange(self.datasize)
np.random.shuffle(indices)
indices1 = indices[:int(self.datasize / 2)]
indices2 = indices[int(self.datasize / 2):2 * (int(self.datasize / 2))]
indices1_gpu = cm.CUDAMatrix(indices1.reshape(1, -1))
indices2_gpu = cm.CUDAMatrix(indices2.reshape(1, -1))
for d in self.data:
d.swap_columns(indices1_gpu, indices2_gpu, target=d)
indices1_gpu.free_device_memory()
indices2_gpu.free_device_memory()
def LoadData(self):
"""Load data from parent cache."""
# Ask parent for data.
data_cpu = self.parent.Get(self._maxpos)
datasize = data_cpu[0].shape[0]
#assert datasize <= self._maxpos,"GPU cache can only store %d datapoints, but parent gave it %d." % (self._maxpos, datasize)
self.datasize = datasize
for i, d in enumerate(data_cpu):
if sp.issparse(d):
mat = d.toarray().T
else:
mat = d.T
size = mat.shape[0] * mat.shape[1]
#print("size",size,self.allocated_memory_size[i])
if size > self.allocated_memory_size[i]:
# If need more space, then allocate new matrix on the GPU.
self.data[i] = cm.CUDAMatrix(mat)
self.allocated_memory_size[i] = mat.shape[0] * mat.shape[1]
else:
# Overwrite old memory. It is ok if size of mat is less than the total
# space that has been allocated.
self.data[i].overwrite(mat)
self.Normalize()
def __init__(self,mat,typ='numpy'):
self.typ = typ
if type(mat) != np.ndarray and type(mat) != np.matrix and type(mat) != np.float64:
self.typ = 'cuda'
self.mat = mat
elif typ == 'numpy':
self.mat = mat
elif typ == 'cuda':
self.mat = cm.CUDAMatrix(mat)
def LoadParams(self, proto, t_op=None, tied_to=None):
"""Load the parameters for this edge.
Load the parameters if present in self.proto. Otherwise initialize them
appropriately.
"""
param_names = [param.name for param in proto.param]
for param in proto.param:
assert param.dimensions, 'Empty dimensions'
if tied_to:
if self.transpose:
self.params[param.name] = tied_to.params[param.name].T
else:
self.params[param.name] = tied_to.params[param.name]
mat = self.params[param.name]
else:
if param.mat:
mat = util.ParameterAsNumpy(param)
else:
mat = self.InitializeParameter(param)
self.params[param.name] = cm.CUDAMatrix(mat)
