tensor.cu

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/*
 Copyright (c) 2021-2023, The Neko Authors
 All rights reserved.
 
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 modification, are permitted provided that the following conditions
 are met:
 
   * Redistributions of source code must retain the above copyright
     notice, this list of conditions and the following disclaimer.
 
   * Redistributions in binary form must reproduce the above
     copyright notice, this list of conditions and the following
     disclaimer in the documentation and/or other materials provided
     with the distribution.
 
   * Neither the name of the authors nor the names of its
     contributors may be used to endorse or promote products derived
     from this software without specific prior written permission.
 
 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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 BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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*/
 
#include <device/device_config.h>
#include <device/cuda/check.h>
#include "tensor_kernel.h"
#include <stdio.h>
 
#define max(a,b) \
  ({ __typeof__ (a) _a = (a);  \
     __typeof__ (b) _b = (b);   \
     _a > _b ? _a : _b; })
 
template<const int N>
static void set_tnsr3d_large_shmem_attr(const size_t shmem_size) {
  static bool is_set = false;
 
  if (!is_set) {
    CUDA_CHECK(cudaFuncSetAttribute(tnsr3d_kernel_large<real, N>,
                                    cudaFuncAttributeMaxDynamicSharedMemorySize,
                                    shmem_size));
    is_set = true;
  }
}
 
extern "C" {
 
  void cuda_tnsr3d(void *v, int *nv, void *u, int *nu,
           void *A, void *Bt, void *Ct, int *nel) {
    const dim3 nthrds(1024, 1, 1);
    const dim3 nblcks(*nel, 1, 1);
    const cudaStream_t stream = (cudaStream_t) glb_cmd_queue;
 
    int n = max(*nu,*nv);
#define CASE(N)                                                              \
    case N:                                                                  \
    tnsr3d_kernel<real, N>                                                   \
      <<<nblcks, nthrds, 0, stream>>>((real *) v, *nv,                       \
                                      (real *) u, *nu,                       \
                                      (real *) A, (real *) Bt, (real *) Ct); \
    CUDA_CHECK(cudaGetLastError());                                          \
    break
 
#define CASE_LARGE(N)                                                        \
    case N: {                                                                \
    const size_t shmem_size = 2 * N * N * N * sizeof(real);                  \
    set_tnsr3d_large_shmem_attr<N>(shmem_size);                              \
    tnsr3d_kernel_large<real, N>                                             \
      <<<nblcks, nthrds, shmem_size, stream>>>((real *) v, *nv,              \
                                               (real *) u, *nu,              \
                                               (real *) A, (real *) Bt,      \
                                               (real *) Ct);                 \
    CUDA_CHECK(cudaGetLastError());                                          \
    }                                                                        \
    break
 
    switch(n) {
      CASE(2);
      CASE(3);
      CASE(4);
      CASE(5);
      CASE(6);
      CASE(7);
      CASE(8); 
      CASE(9);
      CASE(10);
      CASE(11);
      CASE(12);
      CASE(13);
      CASE(14);
      CASE_LARGE(15);
      CASE_LARGE(16);
    default:
      {
        fprintf(stderr, __FILE__ ": size not supported: %d\n", n);
        exit(1);
      }
    }    
  }
 
  void cuda_tnsr3d_el_list(void *v, int *nv, void *u, int *nu,
           void *A, void *Bt, void *Ct, int * elements, int* n_points) {
    const dim3 nthrds(1024, 1, 1);
    const dim3 nblcks(*n_points, 1, 1);
    const cudaStream_t stream = (cudaStream_t) glb_cmd_queue;
 
    int n = max(*nu,*nv);
#define CASE2(N)                                                              \
    case N:                                                                  \
    tnsr3d_el_kernel<real, N>                                                   \
      <<<nblcks, nthrds, 0, stream>>>((real *) v, *nv,                       \
                                      (real *) u, *nu,                       \
                                      (real *) A, (real *) Bt, (real *) Ct,  \
                                      (int *) elements, *n_points); \
    CUDA_CHECK(cudaGetLastError());                                          \
    break
 
    switch(n) {
      CASE2(2);
      CASE2(3);
      CASE2(4);
      CASE2(5);
      CASE2(6);
      CASE2(7);
      CASE2(8); 
      CASE2(9);
      CASE2(10);
      CASE2(11);
      CASE2(12);
      CASE2(13);
      CASE2(14);
    default:
      {
        fprintf(stderr, __FILE__ ": size not supported: %d\n", n);
        exit(1);
      }
    }    
  }
 
}