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/* StarPU --- Runtime system for heterogeneous multicore architectures.
*
* Copyright (C) 2009, 2010 Université de Bordeaux 1
* Copyright (C) 2010, 2011 Centre National de la Recherche Scientifique
*
* StarPU is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or (at
* your option) any later version.
*
* StarPU is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*
* See the GNU Lesser General Public License in COPYING.LGPL for more details.
*/
#include <starpu_config.h>
#include "mpi_cholesky.h"
#include "common/blas.h"
#ifdef STARPU_USE_CUDA
#include <cuda.h>
#include <cuda_runtime.h>
#include <cublas.h>
#ifdef STARPU_HAVE_MAGMA
#include "magma.h"
#include "magma_lapack.h"
#endif
#endif
/*
* U22
*/
static inline void chol_common_cpu_codelet_update_u22(void *descr[], int s, __attribute__((unused)) void *_args)
{
//printf("22\n");
float *left = (float *)STARPU_MATRIX_GET_PTR(descr[0]);
float *right = (float *)STARPU_MATRIX_GET_PTR(descr[1]);
float *center = (float *)STARPU_MATRIX_GET_PTR(descr[2]);
unsigned dx = STARPU_MATRIX_GET_NY(descr[2]);
unsigned dy = STARPU_MATRIX_GET_NX(descr[2]);
unsigned dz = STARPU_MATRIX_GET_NY(descr[0]);
unsigned ld21 = STARPU_MATRIX_GET_LD(descr[0]);
unsigned ld12 = STARPU_MATRIX_GET_LD(descr[1]);
unsigned ld22 = STARPU_MATRIX_GET_LD(descr[2]);
#ifdef STARPU_USE_CUDA
cublasStatus st;
#endif
switch (s)
{
case 0:
SGEMM("N", "T", dy, dx, dz, -1.0f, left, ld21,
right, ld12, 1.0f, center, ld22);
break;
#ifdef STARPU_USE_CUDA
case 1:
cublasSgemm('n', 't', dy, dx, dz,
-1.0f, left, ld21, right, ld12,
1.0f, center, ld22);
st = cublasGetError();
STARPU_ASSERT(!st);
cudaThreadSynchronize();
break;
#endif
default:
STARPU_ABORT();
break;
}
}
void chol_cpu_codelet_update_u22(void *descr[], void *_args)
{
chol_common_cpu_codelet_update_u22(descr, 0, _args);
}
#ifdef STARPU_USE_CUDA
void chol_cublas_codelet_update_u22(void *descr[], void *_args)
{
chol_common_cpu_codelet_update_u22(descr, 1, _args);
}
#endif// STARPU_USE_CUDA
/*
* U21
*/
static inline void chol_common_codelet_update_u21(void *descr[], int s, __attribute__((unused)) void *_args)
{
// printf("21\n");
float *sub11;
float *sub21;
sub11 = (float *)STARPU_MATRIX_GET_PTR(descr[0]);
sub21 = (float *)STARPU_MATRIX_GET_PTR(descr[1]);
unsigned ld11 = STARPU_MATRIX_GET_LD(descr[0]);
unsigned ld21 = STARPU_MATRIX_GET_LD(descr[1]);
unsigned nx21 = STARPU_MATRIX_GET_NY(descr[1]);
unsigned ny21 = STARPU_MATRIX_GET_NX(descr[1]);
switch (s)
{
case 0:
STRSM("R", "L", "T", "N", nx21, ny21, 1.0f, sub11, ld11, sub21, ld21);
break;
#ifdef STARPU_USE_CUDA
case 1:
cublasStrsm('R', 'L', 'T', 'N', nx21, ny21, 1.0f, sub11, ld11, sub21, ld21);
cudaThreadSynchronize();
break;
#endif
default:
STARPU_ABORT();
break;
}
}
void chol_cpu_codelet_update_u21(void *descr[], void *_args)
{
chol_common_codelet_update_u21(descr, 0, _args);
}
#ifdef STARPU_USE_CUDA
void chol_cublas_codelet_update_u21(void *descr[], void *_args)
{
chol_common_codelet_update_u21(descr, 1, _args);
}
#endif
/*
* U11
*/
static inline void chol_common_codelet_update_u11(void *descr[], int s, __attribute__((unused)) void *_args)
{
// printf("11\n");
float *sub11;
sub11 = (float *)STARPU_MATRIX_GET_PTR(descr[0]);
unsigned nx = STARPU_MATRIX_GET_NY(descr[0]);
unsigned ld = STARPU_MATRIX_GET_LD(descr[0]);
unsigned z;
switch (s)
{
case 0:
/*
* - alpha 11 <- lambda 11 = sqrt(alpha11)
* - alpha 21 <- l 21 = alpha 21 / lambda 11
* - A22 <- A22 - l21 trans(l21)
*/
for (z = 0; z < nx; z++)
{
float lambda11;
lambda11 = sqrt(sub11[z+z*ld]);
sub11[z+z*ld] = lambda11;
STARPU_ASSERT(lambda11 != 0.0f);
SSCAL(nx - z - 1, 1.0f/lambda11, &sub11[(z+1)+z*ld], 1);
SSYR("L", nx - z - 1, -1.0f,
&sub11[(z+1)+z*ld], 1,
&sub11[(z+1)+(z+1)*ld], ld);
}
break;
#ifdef STARPU_USE_CUDA
case 1:
#ifdef STARPU_HAVE_MAGMA
{
int ret;
int info;
ret = magma_spotrf_gpu('L', nx, sub11, ld, &info);
if (ret != MAGMA_SUCCESS)
{
fprintf(stderr, "Error in Magma: %d\n", ret);
STARPU_ABORT();
}
cudaError_t cures = cudaThreadSynchronize();
STARPU_ASSERT(!cures);
}
#else
for (z = 0; z < nx; z++)
{
float lambda11;
cudaMemcpy(&lambda11, &sub11[z+z*ld], sizeof(float), cudaMemcpyDeviceToHost);
cudaStreamSynchronize(0);
STARPU_ASSERT(lambda11 != 0.0f);
lambda11 = sqrt(lambda11);
cublasSetVector(1, sizeof(float), &lambda11, sizeof(float), &sub11[z+z*ld], sizeof(float));
cublasSscal(nx - z - 1, 1.0f/lambda11, &sub11[(z+1)+z*ld], 1);
cublasSsyr('U', nx - z - 1, -1.0f,
&sub11[(z+1)+z*ld], 1,
&sub11[(z+1)+(z+1)*ld], ld);
}
cudaThreadSynchronize();
#endif
break;
#endif
default:
STARPU_ABORT();
break;
}
}
void chol_cpu_codelet_update_u11(void *descr[], void *_args)
{
chol_common_codelet_update_u11(descr, 0, _args);
}
#ifdef STARPU_USE_CUDA
void chol_cublas_codelet_update_u11(void *descr[], void *_args)
{
chol_common_codelet_update_u11(descr, 1, _args);
}
#endif// STARPU_USE_CUDA
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