def initialize(self, wfs):
self.timer = wfs.timer
self.world = wfs.world
self.kpt_comm = wfs.kd.comm
self.band_comm = wfs.band_comm
self.dtype = wfs.dtype
self.bd = wfs.bd
self.ksl = wfs.diagksl
self.nbands = wfs.bd.nbands
self.mynbands = wfs.bd.mynbands
self.operator = wfs.matrixoperator
if self.mynbands != self.nbands or self.operator.nblocks != 1:
self.keep_htpsit = False
if self.keep_htpsit:
self.Htpsit_nG = wfs.empty(self.nbands)
if use_mic:
self.Htpsit_nG_mic = stream.bind(self.Htpsit_nG)
stream.sync()
# Preconditioner for the electronic gradients:
self.preconditioner = wfs.make_preconditioner(self.blocksize)
for kpt in wfs.kpt_u:
if kpt.eps_n is None:
kpt.eps_n = np.empty(self.mynbands)
# Allocate arrays for matrix operator
self.operator.allocate_arrays()
self.initialized = True
def initialize(self, wfs):
self.timer = wfs.timer
self.world = wfs.world
self.kpt_comm = wfs.kd.comm
self.band_comm = wfs.band_comm
self.dtype = wfs.dtype
self.bd = wfs.bd
self.ksl = wfs.diagksl
self.nbands = wfs.bd.nbands
self.mynbands = wfs.bd.mynbands
self.operator = wfs.matrixoperator
if self.mynbands != self.nbands or self.operator.nblocks != 1:
self.keep_htpsit = False
if self.keep_htpsit:
self.Htpsit_nG = wfs.empty(self.nbands)
if use_mic:
self.Htpsit_nG_mic = stream.bind(self.Htpsit_nG)
stream.sync()
# Preconditioner for the electronic gradients:
self.preconditioner = wfs.make_preconditioner(self.blocksize)
for kpt in wfs.kpt_u:
if kpt.eps_n is None:
kpt.eps_n = np.empty(self.mynbands)
# Allocate arrays for matrix operator
self.operator.allocate_arrays()
self.initialized = True
def rk(alpha, a, beta, c, trans='c'):
"""Rank-k update of a matrix."""
assert isinstance(a, mic.OffloadArray)
assert isinstance(c, mic.OffloadArray)
dt = map_dtype(a.dtype)
# determine sizes of the matrices
am = a.shape[0]
ak = np.prod(a.shape[1:])
ck = c.shape[0]
cn = np.prod(c.shape[1:])
n, k = am, ak
ldc = c.array.strides[0] / c.array.strides[1]
if a.dtype in [np.complex]:
alpha = complex(alpha)
beta = complex(beta)
# perform the offload
stream.invoke(library.mic_syrk, dt, a, c, n, k,
ldc, alpha, beta)
stream.sync()
def initialize_from_lcao_coefficients(self, basis_functions, mynbands):
for kpt in self.kpt_u:
kpt.psit_nG = self.gd.zeros(self.bd.mynbands, self.dtype)
basis_functions.lcao_to_grid(kpt.C_nM, kpt.psit_nG[:mynbands],
kpt.q)
kpt.C_nM = None
if use_mic:
kpt.psit_nG_mic = stream.bind(kpt.psit_nG)
stream.sync()
def initialize_from_lcao_coefficients(self, basis_functions, mynbands):
for kpt in self.kpt_u:
kpt.psit_nG = self.gd.zeros(self.bd.mynbands, self.dtype)
basis_functions.lcao_to_grid(kpt.C_nM,
kpt.psit_nG[:mynbands], kpt.q)
kpt.C_nM = None
if use_mic:
kpt.psit_nG_mic = stream.bind(kpt.psit_nG)
stream.sync()
def empty(self, n=(), dtype=float, global_array=False, pad=False, usemic=False):
"""Return new uninitialized 3D array for this domain.
The type can be set with the ``dtype`` keyword (default:
``float``). Extra dimensions can be added with ``n=dim``. A
global array spanning all domains can be allocated with
``global_array=True``."""
array = self._new_array(n, dtype, False, global_array, pad)
if usemic:
oa = stream.bind(array)
stream.sync()
return oa
else:
return array
def gemm(alpha, a, b, beta, c, transa='n'):
# we want to make sure that we only use OffloadArrays here
assert isinstance(a, mic.OffloadArray)
assert isinstance(b, mic.OffloadArray)
assert isinstance(c, mic.OffloadArray)
# determine the datatype and map it to int
dt = map_dtype(a.dtype)
# determine sizes of the matrices
am = a.shape[0]
ak = np.prod(a.shape[1:])
bk = b.shape[0]
bn = np.prod(b.shape[1:])
cm = c.shape[0]
cn = np.prod(c.shape[1:])
# just some safety checks
if transa == 'n':
assert am == bn
assert ak == cn
assert bk == cm
trans = 0
m, n, k = ak, bk, am
lda = a.array.strides[0] / a.array.strides[-1]
ldb = b.array.strides[0] / b.array.strides[1]
ldc = c.array.strides[0] / c.array.strides[-1]
else:
assert am == cn
assert ak == bn
assert bk == cm
trans = 1
m, n, k = am, bk, ak
lda = k
ldb = b.array.strides[0] / b.array.strides[-1]
ldc = c.array.strides[0] / c.array.strides[1]
if a.dtype in [np.complex]:
alpha = complex(alpha)
beta = complex(beta)
# perform the offload
stream.invoke(library.mic_gemm, dt,
a, b, c,
m, n, k,
lda, ldb, ldc,
alpha, beta, trans)
stream.sync()
def gemm(alpha, a, b, beta, c, transa='n'):
# we want to make sure that we only use OffloadArrays here
assert isinstance(a, mic.OffloadArray)
assert isinstance(b, mic.OffloadArray)
assert isinstance(c, mic.OffloadArray)
# determine the datatype and map it to int
dt = map_dtype(a.dtype)
# determine sizes of the matrices
am = a.shape[0]
ak = np.prod(a.shape[1:])
bk = b.shape[0]
bn = np.prod(b.shape[1:])
cm = c.shape[0]
cn = np.prod(c.shape[1:])
# just some safety checks
if transa == 'n':
assert am == bn
assert ak == cn
assert bk == cm
trans = 0
m, n, k = ak, bk, am
lda = a.array.strides[0] / a.array.strides[-1]
ldb = b.array.strides[0] / b.array.strides[1]
ldc = c.array.strides[0] / c.array.strides[-1]
else:
assert am == cn
assert ak == bn
assert bk == cm
trans = 1
m, n, k = am, bk, ak
lda = k
ldb = b.array.strides[0] / b.array.strides[-1]
ldc = c.array.strides[0] / c.array.strides[1]
if a.dtype in [np.complex]:
alpha = complex(alpha)
beta = complex(beta)
# perform the offload
stream.invoke(library.mic_gemm, dt, a, b, c, m, n, k, lda, ldb, ldc, alpha,
beta, trans)
stream.sync()
def allocate_arrays(self):
ngroups = self.bd.comm.size
mynbands = self.bd.mynbands
dtype = self.dtype
if ngroups > 1:
self.A_qnn = np.zeros((self.Q, mynbands, mynbands), dtype)
self.A_nn = self.bmd.zeros(dtype=dtype)
if use_mic:
self.A_nn_mic = stream.bind(self.A_nn)
stream.sync()
if ngroups == 1 and self.nblocks == 1:
self.work1_xG = self.gd.empty(self.bd.mynbands, self.dtype)
if use_mic:
self.work1_xG_mic = stream.bind(self.work1_xG)
stream.sync()
else:
self.work1_xG = self.gd.empty(self.X, self.dtype)
self.work2_xG = self.gd.empty(self.X, self.dtype)
def allocate_arrays(self):
ngroups = self.bd.comm.size
mynbands = self.bd.mynbands
dtype = self.dtype
if ngroups > 1:
self.A_qnn = np.zeros((self.Q, mynbands, mynbands), dtype)
self.A_nn = self.bmd.zeros(dtype=dtype)
if use_mic:
self.A_nn_mic = stream.bind(self.A_nn)
stream.sync()
if ngroups == 1 and self.nblocks == 1:
self.work1_xG = self.gd.empty(self.bd.mynbands, self.dtype)
if use_mic:
self.work1_xG_mic = stream.bind(self.work1_xG)
stream.sync()
else:
self.work1_xG = self.gd.empty(self.X, self.dtype)
self.work2_xG = self.gd.empty(self.X, self.dtype)
def H(psit_xG):
if self.keep_htpsit:
result_xG = Htpsit_nG
else:
if use_mic:
result_xG = self.operator.work1_xG_mic
else:
result_xG = reshape(self.operator.work1_xG, psit_xG.shape)
if use_mic:
psit_xG.update_device()
wfs.apply_pseudo_hamiltonian(kpt, hamiltonian, psit_xG.array,
result_xG.array)
result_xG.update_device()
stream.sync()
else:
wfs.apply_pseudo_hamiltonian(kpt, hamiltonian, psit_xG,
result_xG)
hamiltonian.xc.apply_orbital_dependent_hamiltonian(
kpt, psit_xG, result_xG, hamiltonian.dH_asp)
return result_xG
def H(psit_xG):
if self.keep_htpsit:
result_xG = Htpsit_nG
else:
if use_mic:
result_xG = self.operator.work1_xG_mic
else:
result_xG = reshape(self.operator.work1_xG, psit_xG.shape)
if use_mic:
psit_xG.update_device()
wfs.apply_pseudo_hamiltonian(kpt, hamiltonian, psit_xG.array,
result_xG.array)
result_xG.update_device()
stream.sync()
else:
wfs.apply_pseudo_hamiltonian(kpt, hamiltonian, psit_xG,
result_xG)
hamiltonian.xc.apply_orbital_dependent_hamiltonian(
kpt, psit_xG, result_xG, hamiltonian.dH_asp)
return result_xG
def r2k(alpha, a, b, beta, c):
"""Rank-2k update of a matrix."""
assert isinstance(a, mic.OffloadArray)
assert isinstance(b, mic.OffloadArray)
assert isinstance(c, mic.OffloadArray)
assert (map_dtype(a.dtype) != 2)
# determine sizes of the matrices
am = a.shape[0]
ak = np.prod(a.shape[1:])
bm = b.shape[0]
bk = np.prod(b.shape[1:])
ck = c.shape[0]
cn = np.prod(c.shape[1:])
n, k = am, ak
ldc = c.array.strides[0] / c.array.strides[1]
stream.invoke(library.mic_dsyr2k, a, b, c, n, k, ldc, alpha, beta)
stream.sync()
def r2k(alpha, a, b, beta, c):
"""Rank-2k update of a matrix."""
assert isinstance(a, mic.OffloadArray)
assert isinstance(b, mic.OffloadArray)
assert isinstance(c, mic.OffloadArray)
assert(map_dtype(a.dtype) != 2)
# determine sizes of the matrices
am = a.shape[0]
ak = np.prod(a.shape[1:])
bm = b.shape[0]
bk = np.prod(b.shape[1:])
ck = c.shape[0]
cn = np.prod(c.shape[1:])
n, k = am, ak
ldc = c.array.strides[0] / c.array.strides[1]
stream.invoke(library.mic_dsyr2k, a, b, c, n, k,
ldc, alpha, beta)
stream.sync()
def rk(alpha, a, beta, c, trans='c'):
"""Rank-k update of a matrix."""
assert isinstance(a, mic.OffloadArray)
assert isinstance(c, mic.OffloadArray)
dt = map_dtype(a.dtype)
# determine sizes of the matrices
am = a.shape[0]
ak = np.prod(a.shape[1:])
ck = c.shape[0]
cn = np.prod(c.shape[1:])
n, k = am, ak
ldc = c.array.strides[0] / c.array.strides[1]
if a.dtype in [np.complex]:
alpha = complex(alpha)
beta = complex(beta)
# perform the offload
stream.invoke(library.mic_syrk, dt, a, c, n, k, ldc, alpha, beta)
stream.sync()
def subspace_diagonalize(self, hamiltonian, wfs, kpt):
"""Diagonalize the Hamiltonian in the subspace of kpt.psit_nG
*Htpsit_nG* is a work array of same size as psit_nG which contains
the local part of the Hamiltonian times psit on exit
First, the Hamiltonian (defined by *kin*, *vt_sG*, and
*dH_asp*) is applied to the wave functions, then the *H_nn*
matrix is calculated and diagonalized, and finally, the wave
functions (and also Htpsit_nG are rotated. Also the
projections *P_ani* are rotated.
It is assumed that the wave functions *psit_nG* are orthonormal
and that the integrals of projector functions and wave functions
*P_ani* are already calculated.
Return ratated wave functions and H applied to the rotated
wave functions if self.keep_htpsit is True.
"""
if self.band_comm.size > 1 and wfs.bd.strided:
raise NotImplementedError
self.timer.start('Subspace diag')
if use_mic:
psit_nG = kpt.psit_nG_mic
# psit_nG.update_device()
# stream.sync()
else:
psit_nG = kpt.psit_nG
P_ani = kpt.P_ani
if self.keep_htpsit:
if use_mic:
Htpsit_nG = self.Htpsit_nG_mic
else:
Htpsit_nG = reshape(self.Htpsit_nG, psit_nG.shape)
else:
Htpsit_nG = None
def H(psit_xG):
if self.keep_htpsit:
result_xG = Htpsit_nG
else:
if use_mic:
result_xG = self.operator.work1_xG_mic
else:
result_xG = reshape(self.operator.work1_xG, psit_xG.shape)
if use_mic:
psit_xG.update_device()
wfs.apply_pseudo_hamiltonian(kpt, hamiltonian, psit_xG.array,
result_xG.array)
result_xG.update_device()
stream.sync()
else:
wfs.apply_pseudo_hamiltonian(kpt, hamiltonian, psit_xG,
result_xG)
hamiltonian.xc.apply_orbital_dependent_hamiltonian(
kpt, psit_xG, result_xG, hamiltonian.dH_asp)
return result_xG
def dH(a, P_ni):
return np.dot(P_ni, unpack(hamiltonian.dH_asp[a][kpt.s]))
self.timer.start('calc_h_matrix')
H_nn = self.operator.calculate_matrix_elements(psit_nG, P_ani,
H, dH)
hamiltonian.xc.correct_hamiltonian_matrix(kpt, H_nn)
self.timer.stop('calc_h_matrix')
diagonalization_string = repr(self.ksl)
wfs.timer.start(diagonalization_string)
self.ksl.diagonalize(H_nn, kpt.eps_n)
# H_nn now contains the result of the diagonalization.
wfs.timer.stop(diagonalization_string)
self.timer.start('rotate_psi')
psit_nG = self.operator.matrix_multiply(H_nn, psit_nG, P_ani)
if self.keep_htpsit:
if use_mic:
Htpsit_nG = self.operator.matrix_multiply(H_nn, Htpsit_nG,
out_nG=kpt.psit_nG_mic)
else:
Htpsit_nG = self.operator.matrix_multiply(H_nn, Htpsit_nG,
out_nG=kpt.psit_nG)
# Rotate orbital dependent XC stuff:
hamiltonian.xc.rotate(kpt, H_nn)
self.timer.stop('rotate_psi')
self.timer.stop('Subspace diag')
if use_mic:
psit_nG.update_host()
stream.sync()
if self.keep_htpsit:
Htpsit_nG.update_host()
stream.sync()
return psit_nG.array, Htpsit_nG.array
else:
return psit_nG.array, Htpsit_nG
else:
return psit_nG, Htpsit_nG
def orthonormalize(self, wfs, kpt, psit_nG=None):
"""Orthonormalizes the vectors a_nG with respect to the overlap.
First, a Cholesky factorization C is done for the overlap
matrix S_nn = <a_nG | S | a_nG> = C*_nn C_nn Cholesky matrix C
is inverted and orthonormal vectors a_nG' are obtained as::
psit_nG' = inv(C_nn) psit_nG
__
~ _ \ -1 ~ _
psi (r) = ) C psi (r)
n /__ nm m
m
Parameters
----------
psit_nG: ndarray, input/output
On input the set of vectors to orthonormalize,
on output the overlap-orthonormalized vectors.
kpt: KPoint object:
k-point object from kpoint.py.
work_nG: ndarray
Optional work array for overlap matrix times psit_nG.
work_nn: ndarray
Optional work array for overlap matrix.
"""
self.timer.start('Orthonormalize')
if psit_nG is None:
psit_nG = kpt.psit_nG
if use_mic:
psit_nG_mic = kpt.psit_nG_mic
else:
if use_mic:
psit_nG_mic = stream.bind(psit_nG, update_device=False)
stream.sync()
P_ani = kpt.P_ani
self.timer.start('projections')
wfs.pt.integrate(psit_nG, P_ani, kpt.q)
self.timer.stop('projections')
# Construct the overlap matrix:
operator = wfs.matrixoperator
def S(psit_G):
return psit_G
def dS(a, P_ni):
return np.dot(P_ni, wfs.setups[a].dO_ii)
if use_mic:
self.timer.start('calc_s_matrix')
psit_nG_mic.update_device()
stream.sync()
S_nn = operator.calculate_matrix_elements(psit_nG_mic, P_ani, S, dS)
self.timer.stop('calc_s_matrix')
else:
self.timer.start('calc_s_matrix')
S_nn = operator.calculate_matrix_elements(psit_nG, P_ani, S, dS)
self.timer.stop('calc_s_matrix')
orthonormalization_string = repr(self.ksl)
self.timer.start(orthonormalization_string)
#
if extra_parameters.get('sic', False):
#
# symmetric Loewdin Orthonormalization
tri2full(S_nn, UL='L', map=np.conj)
nrm_n = np.empty(S_nn.shape[0])
diagonalize(S_nn, nrm_n)
nrm_nn = np.diag(1.0/np.sqrt(nrm_n))
S_nn = np.dot(np.dot(S_nn.T.conj(), nrm_nn), S_nn)
else:
#
self.ksl.inverse_cholesky(S_nn)
# S_nn now contains the inverse of the Cholesky factorization.
# Let's call it something different:
C_nn = S_nn
del S_nn
self.timer.stop(orthonormalization_string)
self.timer.start('rotate_psi')
if use_mic:
operator.matrix_multiply(C_nn, psit_nG_mic, P_ani, out_nG=kpt.psit_nG_mic)
kpt.psit_nG_mic.update_host()
stream.sync()
# kpt.psit_nG[:] = self.psit_nG_mic.array[:]
else:
operator.matrix_multiply(C_nn, psit_nG, P_ani, out_nG=kpt.psit_nG)
self.timer.stop('rotate_psi')
self.timer.stop('Orthonormalize')
def matrix_multiply(self, C_NN, psit_nG, P_ani=None, out_nG=None):
"""Calculate new linear combinations of wave functions.
Results will be put in the *P_ani* dict and a new psit_nG returned::
__ __
~ \ ~ ~a ~ \ ~a ~
psi <-- ) C psi and <p |psi > <-- ) C <p |psi >
n /__ nn' n' i n /__ nn' i n'
n' n'
Parameters:
C_NN: ndarray
Matrix representation of the requested linear combinations. Even
with a hermitian operator, this matrix need not be self-adjoint.
However, unlike the results from calculate_matrix_elements, it is
assumed that all matrix elements are filled in (use e.g. tri2full).
psit_nG: ndarray
Set of vectors in which the matrix elements are evaluated.
P_ani: dict
Dictionary of projector overlap integrals P_ni = <p_i | psit_nG>.
"""
if self.A_nn is None:
self.allocate_arrays()
band_comm = self.bd.comm
B = band_comm.size
J = self.nblocks
N = self.bd.mynbands
C_NN = self.bmd.redistribute_input(C_NN)
if B == 1 and J == 1:
# Simple case:
if use_mic:
work_nG = self.work1_xG_mic
else:
work_nG = reshape(self.work1_xG, psit_nG.shape)
if out_nG is None:
out_nG = work_nG
# out_nG[:] = 117 # gemm may not like nan's
elif out_nG is psit_nG:
work_nG[:] = psit_nG
psit_nG = work_nG
if use_mic:
if self.gd.comm.rank == 0:
offload_report(1)
C_NN_mic = self.A_nn_mic
C_NN_mic.array[:] = C_NN[:]
C_NN_mic.update_device()
stream.sync()
mic_gemm(1.0, psit_nG, C_NN_mic, 0.0, out_nG)
if self.gd.comm.rank == 0:
offload_report(0)
else:
self.gd.gemm(1.0, psit_nG, C_NN, 0.0, out_nG)
if P_ani:
for P_ni in P_ani.values():
gemm(1.0, P_ni.copy(), C_NN, 0.0, P_ni)
return out_nG
# Now it gets nasty! We parallelize over B groups of bands and
# each grid chunk is divided in J smaller slices (less memory).
Q = B # always non-hermitian XXX
rank = band_comm.rank
shape = psit_nG.shape
psit_nG = psit_nG.reshape(N, -1)
G = psit_nG.shape[1] # number of grid-points
g = int(np.ceil(G / float(J)))
# Buffers for send/receive of pre-multiplication versions of P_ani's.
sbuf_nI = rbuf_nI = None
if P_ani:
sbuf_nI = np.hstack([P_ni for P_ni in P_ani.values()])
sbuf_nI = np.ascontiguousarray(sbuf_nI)
if B > 1:
rbuf_nI = np.empty_like(sbuf_nI)
# Because of the amount of communication involved, we need to
# be syncronized up to this point but only on the 1D band_comm
# communication ring
band_comm.barrier()
while g * J >= G + g: # remove extra slice(s)
J -= 1
assert 0 < g * J < G + g
work1_xG = reshape(self.work1_xG, (self.X,) + psit_nG.shape[1:])
work2_xG = reshape(self.work2_xG, (self.X,) + psit_nG.shape[1:])
for j in range(J):
G1 = j * g
G2 = G1 + g
if G2 > G:
G2 = G
g = G2 - G1
sbuf_ng = reshape(work1_xG, (N, g))
rbuf_ng = reshape(work2_xG, (N, g))
sbuf_ng[:] = psit_nG[:, G1:G2]
beta = 0.0
cycle_P_ani = (j == J - 1 and P_ani)
for q in range(Q):
# Start sending currently buffered kets to rank below
# and receiving next set of kets from rank above us.
# If we're at the last slice, start cycling P_ani too.
if q < Q - 1:
self._initialize_cycle(sbuf_ng, rbuf_ng,
sbuf_nI, rbuf_nI, cycle_P_ani)
# Calculate wave-function contributions from the current slice
# of grid data by the current mynbands x mynbands matrix block.
C_nn = self.bmd.extract_block(C_NN, (rank + q) % B, rank)
self.gd.gemm(1.0, sbuf_ng, C_nn, beta, psit_nG[:, G1:G2])
# If we're at the last slice, add contributions to P_ani's.
if cycle_P_ani:
I1 = 0
for P_ni in P_ani.values():
I2 = I1 + P_ni.shape[1]
gemm(1.0, sbuf_nI[:, I1:I2], C_nn, beta, P_ni)
I1 = I2
# Wait for all send/receives to finish before next iteration.
# Swap send and receive buffer such that next becomes current.
# If we're at the last slice, also finishes the P_ani cycle.
if q < Q - 1:
sbuf_ng, rbuf_ng, sbuf_nI, rbuf_nI = self._finish_cycle(
sbuf_ng, rbuf_ng, sbuf_nI, rbuf_nI, cycle_P_ani)
# First iteration was special because we initialized the kets
if q == 0:
beta = 1.0
psit_nG.shape = shape
return psit_nG
def subspace_diagonalize(self, hamiltonian, wfs, kpt):
"""Diagonalize the Hamiltonian in the subspace of kpt.psit_nG
*Htpsit_nG* is a work array of same size as psit_nG which contains
the local part of the Hamiltonian times psit on exit
First, the Hamiltonian (defined by *kin*, *vt_sG*, and
*dH_asp*) is applied to the wave functions, then the *H_nn*
matrix is calculated and diagonalized, and finally, the wave
functions (and also Htpsit_nG are rotated. Also the
projections *P_ani* are rotated.
It is assumed that the wave functions *psit_nG* are orthonormal
and that the integrals of projector functions and wave functions
*P_ani* are already calculated.
Return ratated wave functions and H applied to the rotated
wave functions if self.keep_htpsit is True.
"""
if self.band_comm.size > 1 and wfs.bd.strided:
raise NotImplementedError
self.timer.start('Subspace diag')
if use_mic:
psit_nG = kpt.psit_nG_mic
# psit_nG.update_device()
# stream.sync()
else:
psit_nG = kpt.psit_nG
P_ani = kpt.P_ani
if self.keep_htpsit:
if use_mic:
Htpsit_nG = self.Htpsit_nG_mic
else:
Htpsit_nG = reshape(self.Htpsit_nG, psit_nG.shape)
else:
Htpsit_nG = None
def H(psit_xG):
if self.keep_htpsit:
result_xG = Htpsit_nG
else:
if use_mic:
result_xG = self.operator.work1_xG_mic
else:
result_xG = reshape(self.operator.work1_xG, psit_xG.shape)
if use_mic:
psit_xG.update_device()
wfs.apply_pseudo_hamiltonian(kpt, hamiltonian, psit_xG.array,
result_xG.array)
result_xG.update_device()
stream.sync()
else:
wfs.apply_pseudo_hamiltonian(kpt, hamiltonian, psit_xG,
result_xG)
hamiltonian.xc.apply_orbital_dependent_hamiltonian(
kpt, psit_xG, result_xG, hamiltonian.dH_asp)
return result_xG
def dH(a, P_ni):
return np.dot(P_ni, unpack(hamiltonian.dH_asp[a][kpt.s]))
self.timer.start('calc_h_matrix')
H_nn = self.operator.calculate_matrix_elements(psit_nG, P_ani, H, dH)
hamiltonian.xc.correct_hamiltonian_matrix(kpt, H_nn)
self.timer.stop('calc_h_matrix')
diagonalization_string = repr(self.ksl)
wfs.timer.start(diagonalization_string)
self.ksl.diagonalize(H_nn, kpt.eps_n)
# H_nn now contains the result of the diagonalization.
wfs.timer.stop(diagonalization_string)
self.timer.start('rotate_psi')
psit_nG = self.operator.matrix_multiply(H_nn, psit_nG, P_ani)
if self.keep_htpsit:
if use_mic:
Htpsit_nG = self.operator.matrix_multiply(
H_nn, Htpsit_nG, out_nG=kpt.psit_nG_mic)
else:
Htpsit_nG = self.operator.matrix_multiply(H_nn,
Htpsit_nG,
out_nG=kpt.psit_nG)
# Rotate orbital dependent XC stuff:
hamiltonian.xc.rotate(kpt, H_nn)
self.timer.stop('rotate_psi')
self.timer.stop('Subspace diag')
if use_mic:
psit_nG.update_host()
stream.sync()
if self.keep_htpsit:
Htpsit_nG.update_host()
stream.sync()
return psit_nG.array, Htpsit_nG.array
else:
return psit_nG.array, Htpsit_nG
else:
return psit_nG, Htpsit_nG
def matrix_multiply(self, C_NN, psit_nG, P_ani=None, out_nG=None):
"""Calculate new linear combinations of wave functions.
Results will be put in the *P_ani* dict and a new psit_nG returned::
__ __
~ \ ~ ~a ~ \ ~a ~
psi <-- ) C psi and <p |psi > <-- ) C <p |psi >
n /__ nn' n' i n /__ nn' i n'
n' n'
Parameters:
C_NN: ndarray
Matrix representation of the requested linear combinations. Even
with a hermitian operator, this matrix need not be self-adjoint.
However, unlike the results from calculate_matrix_elements, it is
assumed that all matrix elements are filled in (use e.g. tri2full).
psit_nG: ndarray
Set of vectors in which the matrix elements are evaluated.
P_ani: dict
Dictionary of projector overlap integrals P_ni = <p_i | psit_nG>.
"""
if self.A_nn is None:
self.allocate_arrays()
band_comm = self.bd.comm
B = band_comm.size
J = self.nblocks
N = self.bd.mynbands
C_NN = self.bmd.redistribute_input(C_NN)
if B == 1 and J == 1:
# Simple case:
if use_mic:
work_nG = self.work1_xG_mic
else:
work_nG = reshape(self.work1_xG, psit_nG.shape)
if out_nG is None:
out_nG = work_nG
# out_nG[:] = 117 # gemm may not like nan's
elif out_nG is psit_nG:
work_nG[:] = psit_nG
psit_nG = work_nG
if use_mic:
if self.gd.comm.rank == 0:
offload_report(1)
C_NN_mic = self.A_nn_mic
C_NN_mic.array[:] = C_NN[:]
C_NN_mic.update_device()
stream.sync()
mic_gemm(1.0, psit_nG, C_NN_mic, 0.0, out_nG)
if self.gd.comm.rank == 0:
offload_report(0)
else:
self.gd.gemm(1.0, psit_nG, C_NN, 0.0, out_nG)
if P_ani:
for P_ni in P_ani.values():
gemm(1.0, P_ni.copy(), C_NN, 0.0, P_ni)
return out_nG
# Now it gets nasty! We parallelize over B groups of bands and
# each grid chunk is divided in J smaller slices (less memory).
Q = B # always non-hermitian XXX
rank = band_comm.rank
shape = psit_nG.shape
psit_nG = psit_nG.reshape(N, -1)
G = psit_nG.shape[1] # number of grid-points
g = int(np.ceil(G / float(J)))
# Buffers for send/receive of pre-multiplication versions of P_ani's.
sbuf_nI = rbuf_nI = None
if P_ani:
sbuf_nI = np.hstack([P_ni for P_ni in P_ani.values()])
sbuf_nI = np.ascontiguousarray(sbuf_nI)
if B > 1:
rbuf_nI = np.empty_like(sbuf_nI)
# Because of the amount of communication involved, we need to
# be syncronized up to this point but only on the 1D band_comm
# communication ring
band_comm.barrier()
while g * J >= G + g: # remove extra slice(s)
J -= 1
assert 0 < g * J < G + g
work1_xG = reshape(self.work1_xG, (self.X, ) + psit_nG.shape[1:])
work2_xG = reshape(self.work2_xG, (self.X, ) + psit_nG.shape[1:])
for j in range(J):
G1 = j * g
G2 = G1 + g
if G2 > G:
G2 = G
g = G2 - G1
sbuf_ng = reshape(work1_xG, (N, g))
rbuf_ng = reshape(work2_xG, (N, g))
sbuf_ng[:] = psit_nG[:, G1:G2]
beta = 0.0
cycle_P_ani = (j == J - 1 and P_ani)
for q in range(Q):
# Start sending currently buffered kets to rank below
# and receiving next set of kets from rank above us.
# If we're at the last slice, start cycling P_ani too.
if q < Q - 1:
self._initialize_cycle(sbuf_ng, rbuf_ng, sbuf_nI, rbuf_nI,
cycle_P_ani)
# Calculate wave-function contributions from the current slice
# of grid data by the current mynbands x mynbands matrix block.
C_nn = self.bmd.extract_block(C_NN, (rank + q) % B, rank)
self.gd.gemm(1.0, sbuf_ng, C_nn, beta, psit_nG[:, G1:G2])
# If we're at the last slice, add contributions to P_ani's.
if cycle_P_ani:
I1 = 0
for P_ni in P_ani.values():
I2 = I1 + P_ni.shape[1]
gemm(1.0, sbuf_nI[:, I1:I2], C_nn, beta, P_ni)
I1 = I2
# Wait for all send/receives to finish before next iteration.
# Swap send and receive buffer such that next becomes current.
# If we're at the last slice, also finishes the P_ani cycle.
if q < Q - 1:
sbuf_ng, rbuf_ng, sbuf_nI, rbuf_nI = self._finish_cycle(
sbuf_ng, rbuf_ng, sbuf_nI, rbuf_nI, cycle_P_ani)
# First iteration was special because we initialized the kets
if q == 0:
beta = 1.0
psit_nG.shape = shape
return psit_nG
def orthonormalize(self, wfs, kpt, psit_nG=None):
"""Orthonormalizes the vectors a_nG with respect to the overlap.
First, a Cholesky factorization C is done for the overlap
matrix S_nn = <a_nG | S | a_nG> = C*_nn C_nn Cholesky matrix C
is inverted and orthonormal vectors a_nG' are obtained as::
psit_nG' = inv(C_nn) psit_nG
__
~ _ \ -1 ~ _
psi (r) = ) C psi (r)
n /__ nm m
m
Parameters
----------
psit_nG: ndarray, input/output
On input the set of vectors to orthonormalize,
on output the overlap-orthonormalized vectors.
kpt: KPoint object:
k-point object from kpoint.py.
work_nG: ndarray
Optional work array for overlap matrix times psit_nG.
work_nn: ndarray
Optional work array for overlap matrix.
"""
self.timer.start('Orthonormalize')
if psit_nG is None:
psit_nG = kpt.psit_nG
if use_mic:
psit_nG_mic = kpt.psit_nG_mic
else:
if use_mic:
psit_nG_mic = stream.bind(psit_nG, update_device=False)
stream.sync()
P_ani = kpt.P_ani
self.timer.start('projections')
wfs.pt.integrate(psit_nG, P_ani, kpt.q)
self.timer.stop('projections')
# Construct the overlap matrix:
operator = wfs.matrixoperator
def S(psit_G):
return psit_G
def dS(a, P_ni):
return np.dot(P_ni, wfs.setups[a].dO_ii)
if use_mic:
self.timer.start('calc_s_matrix')
psit_nG_mic.update_device()
stream.sync()
S_nn = operator.calculate_matrix_elements(psit_nG_mic, P_ani, S,
dS)
self.timer.stop('calc_s_matrix')
else:
self.timer.start('calc_s_matrix')
S_nn = operator.calculate_matrix_elements(psit_nG, P_ani, S, dS)
self.timer.stop('calc_s_matrix')
orthonormalization_string = repr(self.ksl)
self.timer.start(orthonormalization_string)
#
if extra_parameters.get('sic', False):
#
# symmetric Loewdin Orthonormalization
tri2full(S_nn, UL='L', map=np.conj)
nrm_n = np.empty(S_nn.shape[0])
diagonalize(S_nn, nrm_n)
nrm_nn = np.diag(1.0 / np.sqrt(nrm_n))
S_nn = np.dot(np.dot(S_nn.T.conj(), nrm_nn), S_nn)
else:
#
self.ksl.inverse_cholesky(S_nn)
# S_nn now contains the inverse of the Cholesky factorization.
# Let's call it something different:
C_nn = S_nn
del S_nn
self.timer.stop(orthonormalization_string)
self.timer.start('rotate_psi')
if use_mic:
operator.matrix_multiply(C_nn,
psit_nG_mic,
P_ani,
out_nG=kpt.psit_nG_mic)
kpt.psit_nG_mic.update_host()
stream.sync()
# kpt.psit_nG[:] = self.psit_nG_mic.array[:]
else:
operator.matrix_multiply(C_nn, psit_nG, P_ani, out_nG=kpt.psit_nG)
self.timer.stop('rotate_psi')
self.timer.stop('Orthonormalize')
def integrate(self, a_xg, b_yg=None,
global_integral=True, hermitian=False,
_transposed_result=None):
"""Integrate function(s) over domain.
a_xg: ndarray
Function(s) to be integrated.
b_yg: ndarray
If present, integrate a_xg.conj() * b_yg.
global_integral: bool
If the array(s) are distributed over several domains, then the
total sum will be returned. To get the local contribution
only, use global_integral=False.
hermitian: bool
Result is hermitian.
_transposed_result: ndarray
Long story. Don't use this unless you are a method of the
MatrixOperator class ..."""
xshape = a_xg.shape[:-3]
if b_yg is None:
# Only one array:
result = a_xg.reshape(xshape + (-1,)).sum(axis=-1) * self.dv
if global_integral:
if result.ndim == 0:
result = self.comm.sum(result)
else:
self.comm.sum(result)
return result
if isinstance(a_xg, mic.OffloadArray):
# offload arrays have to be contiguous in any case
A_xg = a_xg
B_yg = b_yg
else:
A_xg = np.ascontiguousarray(a_xg.reshape((-1,) + a_xg.shape[-3:]))
B_yg = np.ascontiguousarray(b_yg.reshape((-1,) + b_yg.shape[-3:]))
if _transposed_result is None:
result_yx = np.zeros((len(B_yg), len(A_xg)), A_xg.dtype)
else:
result_yx = _transposed_result
global_integral = False
if isinstance(a_xg, mic.OffloadArray):
result_yx_mic = stream.bind(result_yx)
stream.sync()
# result_yx_mic.fillfrom(result_yx)
# result_yx_mic.array[:] = result_yx[:]
# result_yx_mic.update_device()
if a_xg is b_yg:
if isinstance(a_xg, mic.OffloadArray):
# dsyrk performs badly in MIC so use dgemm here
# mic_rk(self.dv, A_xg, 0.0, result_yx_mic)
mic_gemm(self.dv, A_xg, A_xg, 0.0, result_yx_mic, 'c')
else:
rk(self.dv, A_xg, 0.0, result_yx)
elif hermitian:
if isinstance(a_xg, mic.OffloadArray):
mic_r2k(self.dv, A_xg, B_yg, 0.0, result_yx_mic)
else:
r2k(0.5 * self.dv, A_xg, B_yg, 0.0, result_yx)
else:
if isinstance(a_xg, mic.OffloadArray):
mic_gemm(self.dv, A_xg, B_yg, 0.0, result_yx_mic, 'c')
else:
gemm(self.dv, A_xg, B_yg, 0.0, result_yx, 'c')
if isinstance(a_xg, mic.OffloadArray):
result_yx_mic.update_host()
stream.sync()
if global_integral:
self.comm.sum(result_yx)
yshape = b_yg.shape[:-3]
result = result_yx.T.reshape(xshape + yshape)
if result.ndim == 0:
return result.item()
else:
return result