Changes between Initial Version and Version 1 of Blas Level 3

Timestamp:

08/20/15 12:51:57 (10 years ago)

Author:

fuji

Comment:

—

Blas Level 3

@@ +1 @@
+= Blas Level 3 =
+== C ==
+{{{#!c
+/*
+ Tulane HPC Workshop
+
+ Blas Level 3 : dgemm test
+ */
+#include<stdio.h>
+#include<stdlib.h>
+#include<math.h>
+#include<time.h>
+
+#ifdef __APPLE__
+#include <Accelerate/Accelerate.h>
+#else
+#ifdef MKL_ILP64
+#include <mkl.h>
+#include <mkl_cblas.h>
+#else
+#include <atlas/cblas.h>
+#endif
+#endif
+
+#ifdef _OPENMP
+#include <omp.h>
+#endif
+
+#define SIZE 2000
+
+/* my simple dgemm */
+void mydgemm(int m, int n, double al, double *a, double *b, double bt, double *c) {
+        int i, j, jj;
+        /* compute C := alpha * AB + beta * C */
+        for (i = 0; i < n; i++) {
+                for (j = 0; j < m; j++) {
+                        c[i + m * j] *= bt;
+                        for (jj = 0; jj < m; jj++) {
+                                c[i + m * j] += al * a[i + m * jj] * b[jj + m * j];
+                        }
+                }
+        }
+}
+int main(void) {
+        int i, j, n, m, inc;
+        double *cmat;
+        double *bmat;
+        double *amat;
+        double alpha, beta;
+#ifdef _OPENMP
+        double tsomp, teomp;
+#endif
+        clock_t ts, te;
+
+        /* alloc vector and matrix */
+#ifdef MKL_ILP64
+        cmat = (double *)mkl_malloc(SIZE * SIZE * sizeof(double), 64);
+        bmat = (double *)mkl_malloc(SIZE * SIZE * sizeof(double), 64);
+        amat = (double *)mkl_malloc(SIZE * SIZE * sizeof(double), 64);
+#else
+        cmat = calloc(SIZE * SIZE, sizeof(double));
+        bmat = calloc(SIZE * SIZE, sizeof(double));
+        amat = calloc(SIZE * SIZE, sizeof(double));
+#endif
+        if ((cmat == NULL ) || (bmat == NULL ) || (amat == NULL )) {
+                exit(-1);
+        }
+
+        /* setup matrix A B C*/
+        for (i = 0; i < SIZE; i++) {
+                for (j = 0; j < SIZE; j++) {
+                        amat[i + SIZE * j] = i + 100.0 / (1.0 + fabs((double) i - (double) j));
+                        bmat[i + SIZE * j] = i + 100.0 / (1.0 + fabs((double) i - (double) j));
+                        cmat[i + SIZE * j] = 0.0;
+                }
+        }
+
+        /* calculate bvec = alpha*amat*bmat + beta*cmat */
+        alpha = 1.0;
+        beta = 0.0;
+
+        /* call my dgemv */
+        ts = clock();
+        mydgemm(SIZE, SIZE, alpha, amat, bmat, beta, cmat);
+        te = clock();
+
+        printf("|C|=%f\n", cblas_dnrm2(SIZE * SIZE, cmat, 1));
+        printf("Time : my dgemv = %f (sec)\n",  1.0 * (te - ts) / CLOCKS_PER_SEC);
+
+        /* call blas dgemm */
+#ifdef _OPENMP
+        tsomp = omp_get_wtime();
+#else
+        ts = clock();
+#endif
+        cblas_dgemm(CblasColMajor, CblasNoTrans, CblasNoTrans, SIZE, SIZE, SIZE, 1.0, amat, SIZE, bmat,SIZE, 0.0, cmat, SIZE);
+        printf("|C|=%f\n", cblas_dnrm2(SIZE * SIZE, cmat, 1));
+#ifdef _OPENMP
+        teomp = omp_get_wtime();
+        printf("Time : cblas dgemv = %f (sec) Threads=%d\n",  (teomp - tsomp), omp_get_max_threads());
+#else
+        te = clock();
+        printf("Time : cblas dgemv = %f (sec)\n",  1.0 * (te - ts) / CLOCKS_PER_SEC);
+#endif
+
+#ifdef MKL_ILP64
+        mkl_free(cmat);
+        mkl_free(bmat);
+        mkl_free(amat);
+#else
+        free(cmat);
+        free(bmat);
+        free(amat);
+#endif
+}
+}}}
+
+== C++ ==
+{{{#!c++
+//
+// Tulane HPC Workshop
+//
+// Blas Level 3 : dgemm test
+//
+#include <iostream>
+#include <cstdlib>
+#include <fstream>
+#include <iomanip>
+#include <algorithm>
+#include <cmath>
+#include <ctime>
+#ifdef __APPLE__
+#include <Accelerate/Accelerate.h>
+#else
+#ifdef MKL_ILP64
+#include <mkl.h>
+#include <mkl_cblas.h>
+#else
+extern "C" {
+#include <atlas/cblas.h>
+}
+#endif
+#endif
+
+#ifdef _OPENMP
+#include <omp.h>
+#endif
+
+/* my simple dgemm */
+void mydgemm(int m, int n, double al, double *a, double *b, double bt, double *c) {
+        /* compute C := alpha * AB + beta * C */
+        for (int i = 0; i < n; i++) {
+                for (int j = 0; j < m; j++) {
+                        c[i + m * j] *= bt;
+                        for (int jj = 0; jj < m; jj++) {
+                                c[i + m * j] += al * a[i + m * jj] * b[jj + m * j];
+                        }
+                }
+        }
+}
+int main(void) {
+        const unsigned int size = 2000;
+
+        /* alloc vector and matrix */
+#ifdef MKL_ILP64
+        double *cmat = (double *)mkl_malloc(size * size * sizeof(double), 64);
+        double *bmat = (double *)mkl_malloc(size * size * sizeof(double), 64);
+        double *amat = (double *)mkl_malloc(size * size * sizeof(double), 64);
+#else
+        double *cmat = new double[size * size];
+        double *bmat = new double[size * size];
+        double *amat = new double[size * size];
+#endif
+
+        double alpha, beta;
+
+        /* setup matrix A B C*/
+        for (int i = 0; i < size; i++) {
+                for (int j = 0; j < size; j++) {
+                        amat[i + size * j] = i + 100.0 / (1.0 + fabs((double) i - (double) j));
+                        bmat[i + size * j] = i + 100.0 / (1.0 + fabs((double) i - (double) j));
+                        cmat[i + size * j] = 0.0;
+                }
+        }
+
+#ifdef _OPENMP
+        double tsomp, teomp;
+#endif
+        clock_t ts, te;
+
+        /* calculate bvec = alpha*amat*bmat + beta*cmat */
+        alpha = 1.0;
+        beta = 0.0;
+
+        /* call my dgemm */
+        ts = clock();
+        mydgemm(size, size, alpha, amat, bmat, beta, cmat);
+        te = clock();
+        std::cout << "|C|=" << cblas_dnrm2(size * size, cmat, 1) << std::endl;
+        std::cout << "Time : my dgemm = " << 1.0 * (te - ts) / CLOCKS_PER_SEC << "(sec)\n";
+
+        /* call blas dgemm */
+#ifdef _OPENMP
+        tsomp = omp_get_wtime();
+#else
+        ts = clock();
+#endif
+
+        cblas_dgemm(CblasColMajor, CblasNoTrans, CblasNoTrans, size, size, size, 1.0, amat, size, bmat,size, 0.0, cmat, size);
+        std::cout << "|C|=" << cblas_dnrm2(size * size, cmat, 1) << std::endl;
+
+#ifdef _OPENMP
+        teomp = omp_get_wtime();
+        std::cout << "Time : cblas dgemm = " << (teomp - tsomp)  << "(sec) Threads=" << omp_get_max_threads() << std::endl;
+#else
+        te = clock();
+        std::cout << "Time : cblas dgemm = " << 1.0 * (te - ts) / CLOCKS_PER_SEC << "(sec)\n";
+#endif
+
+
+
+#ifdef MKL_ILP64
+        mkl_free(cmat);
+        mkl_free(bmat);
+        mkl_free(amat);
+#else
+        delete [] cmat;
+        delete [] bmat;
+        delete [] amat;
+#endif
+}
+}}}
+
+== Fortran ==
+{{{#!fortran
+!
+! Tulane HPC Workshop
+!
+! Blas Level 3 : dgemm test
+!
+
+! my simple dgemm
+subroutine mydgemm(m, n, al, a, b, bt, c)
+    implicit none
+    integer :: i, j, jj, n, m
+    double precision :: a(n * m),b(n * m),c(n * m)
+    double precision :: al, bt
+
+        ! compute C := alpha * AB + beta * C
+        do i = 1, n
+                do j = 1, m
+                        c(i + m * (j - 1)) = bt * c(i + m * (j - 1))
+                        do jj = 1,m
+                                c(i + m * (j - 1)) = c(i + m * (j - 1)) + al * a(i + m * (jj - 1)) * b(jj + m * (j - 1))
+                        end do
+                end do
+        end do
+end subroutine mydgemm
+!
+!
+Program blas3
+    use omp_lib           !Provides OpenMP* specific APIs
+    implicit none
+    integer, parameter:: SIZE = 2000
+    integer :: i, j
+    double precision, allocatable, dimension(:) :: amat,bmat,cmat
+    double precision :: ts, te
+    double precision :: dnrm2
+
+        ! alloc vector and matrix
+        allocate(amat(SIZE*SIZE),bmat(SIZE*SIZE),cmat(SIZE*SIZE))
+
+        ! setup matrix A B C
+        do i = 1,SIZE
+        do j = 1, SIZE
+            amat(i + SIZE * (j - 1)) = i - 1 + 100.0 / (1.0 + abs(i - j))
+            bmat(i + SIZE * (j - 1)) = i - 1 + 100.0 / (1.0 + abs(i - j))
+            cmat(i + SIZE * (j - 1)) = 0.d0
+        end do
+    end do
+
+        ! call my dgemv
+        ts = omp_get_wtime()
+        call mydgemm(SIZE, SIZE, 1.d0, amat, bmat, 0.d0, cmat)
+        te = omp_get_wtime()
+        print*, "|C|=", dnrm2(SIZE*SIZE, cmat, 1)
+    print*, "Time : my dgemv = ", (te - ts),"(sec)"
+
+
+        ! call blas dgemm
+        ts = omp_get_wtime();
+    call dgemm('N', 'N', SIZE, SIZE, SIZE, 1.d0, amat, SIZE, bmat,SIZE, 0.d0, cmat, SIZE)
+    te = omp_get_wtime();
+    print*, "|C|=", dnrm2(SIZE*SIZE, cmat, 1)
+    print*, "Time : blas dgemm = ", (te - ts),"(sec)"
+
+    deallocate(amat,bmat,cmat)
+end Program blas3
+}}}