cuda-samples/Common/helper_cusolver.h

/* Copyright (c) 2022, NVIDIA CORPORATION. All rights reserved.
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 *  * Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
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 *    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 ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef HELPER_CUSOLVER
#define HELPER_CUSOLVER

#include <ctype.h>
#include <cuda_runtime.h>
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "cusparse.h"

#define SWITCH_CHAR '-'

struct testOpts {
  char *sparse_mat_filename;  // by switch -F<filename>
  const char *testFunc;       // by switch -R<name>
  const char *reorder;        // by switch -P<name>
  int lda;                    // by switch -lda<int>
};

double vec_norminf(int n, const double *x) {
  double norminf = 0;
  for (int j = 0; j < n; j++) {
    double x_abs = fabs(x[j]);
    norminf = (norminf > x_abs) ? norminf : x_abs;
  }
  return norminf;
}

/*
 * |A| = max { |A|*ones(m,1) }
 */
double mat_norminf(int m, int n, const double *A, int lda) {
  double norminf = 0;
  for (int i = 0; i < m; i++) {
    double sum = 0.0;
    for (int j = 0; j < n; j++) {
      double A_abs = fabs(A[i + j * lda]);
      sum += A_abs;
    }
    norminf = (norminf > sum) ? norminf : sum;
  }
  return norminf;
}

/*
 * |A| = max { |A|*ones(m,1) }
 */
double csr_mat_norminf(int m, int n, int nnzA, const cusparseMatDescr_t descrA,
                       const double *csrValA, const int *csrRowPtrA,
                       const int *csrColIndA) {
  const int baseA =
      (CUSPARSE_INDEX_BASE_ONE == cusparseGetMatIndexBase(descrA)) ? 1 : 0;

  double norminf = 0;
  for (int i = 0; i < m; i++) {
    double sum = 0.0;
    const int start = csrRowPtrA[i] - baseA;
    const int end = csrRowPtrA[i + 1] - baseA;
    for (int colidx = start; colidx < end; colidx++) {
      // const int j = csrColIndA[colidx] - baseA;
      double A_abs = fabs(csrValA[colidx]);
      sum += A_abs;
    }
    norminf = (norminf > sum) ? norminf : sum;
  }
  return norminf;
}

void display_matrix(int m, int n, int nnzA, const cusparseMatDescr_t descrA,
                    const double *csrValA, const int *csrRowPtrA,
                    const int *csrColIndA) {
  const int baseA =
      (CUSPARSE_INDEX_BASE_ONE == cusparseGetMatIndexBase(descrA)) ? 1 : 0;

  printf("m = %d, n = %d, nnz = %d, matlab base-1\n", m, n, nnzA);

  for (int row = 0; row < m; row++) {
    const int start = csrRowPtrA[row] - baseA;
    const int end = csrRowPtrA[row + 1] - baseA;
    for (int colidx = start; colidx < end; colidx++) {
      const int col = csrColIndA[colidx] - baseA;
      double Areg = csrValA[colidx];
      printf("A(%d, %d) = %20.16E\n", row + 1, col + 1, Areg);
    }
  }
}

#if defined(_WIN32)
#if !defined(WIN32_LEAN_AND_MEAN)
#define WIN32_LEAN_AND_MEAN
#endif
#include <windows.h>
double second(void) {
  LARGE_INTEGER t;
  static double oofreq;
  static int checkedForHighResTimer;
  static BOOL hasHighResTimer;

  if (!checkedForHighResTimer) {
    hasHighResTimer = QueryPerformanceFrequency(&t);
    oofreq = 1.0 / (double)t.QuadPart;
    checkedForHighResTimer = 1;
  }
  if (hasHighResTimer) {
    QueryPerformanceCounter(&t);
    return (double)t.QuadPart * oofreq;
  } else {
    return (double)GetTickCount() / 1000.0;
  }
}

#elif defined(__linux__) || defined(__QNX__)
#include <stddef.h>
#include <sys/resource.h>
#include <sys/time.h>
double second(void) {
  struct timeval tv;
  gettimeofday(&tv, NULL);
  return (double)tv.tv_sec + (double)tv.tv_usec / 1000000.0;
}

#elif defined(__APPLE__)
#include <stddef.h>
#include <sys/resource.h>
#include <sys/sysctl.h>
#include <sys/time.h>
#include <sys/types.h>
double second(void) {
  struct timeval tv;
  gettimeofday(&tv, NULL);
  return (double)tv.tv_sec + (double)tv.tv_usec / 1000000.0;
}
#else
#error unsupported platform
#endif

#endif