MKL库的配置和使用

大家好，欢迎来到IT知识分享网。

提示：文章写完后，目录可以自动生成，如何生成可参考右边的帮助文档

前言

操作系统：Ubuntu1804 

linux系统都可以参考！！！

一、MKL在哪里下载？

二、如何安装

1.安装命令如下。

sudo sh l_onemkl_p_2024.0.0.49673_offline.sh 

安装过程中可以自定义安装路径，比如/opt，后面的步骤注意使用自己的路径。

2.安装好后，在安装的路径下找到setvars.sh

source /opt/intel/oneapi/setvars.sh 

输出信息如下。

:: initializing oneAPI environment ... bash: BASH_VERSION = 4.4.20(1)-release args: Using "$@" for setvars.sh arguments: :: compiler -- latest :: mkl -- latest :: tbb -- latest :: oneAPI environment initialized :: 

!!!感觉这一步并不是必须的，但是我运行过了，还是分享一下吧。

三、系统环境

这里将MKL运行动态库和静态库加入到系统环境中，不然运行时会找不到库。

vi ~/.bashrc 

在末尾加上这两行，分别是

# mkl export LD_LIBRARY_PATH="/opt/intel/oneapi/mkl/latest/lib:$LD_LIBRARY_PATH" export LIBRARY_PATH="/opt/intel/one/mkl/latest/lib:$LIBRARY_PATH" 

然后更新一下

source ~/.bashrc 

四、编译和运行

最重要的是-lmkl_rt这个参数。

1.测试用例是MKL官网的例子，保存为main.c

/* * Copyright (C) 2009-2015 Intel Corporation. All Rights Reserved. * The information and material ("Material") provided below is owned by Intel * Corporation or its suppliers or licensors, and title to such Material remains * with Intel Corporation or its suppliers or licensors. The Material contains * proprietary information of Intel or its suppliers and licensors. The Material * is protected by worldwide copyright laws and treaty provisions. No part of * the Material may be copied, reproduced, published, uploaded, posted, * transmitted, or distributed in any way without Intel's prior express written * permission. No license under any patent, copyright or other intellectual * property rights in the Material is granted to or conferred upon you, either * expressly, by implication, inducement, estoppel or otherwise. Any license * under such intellectual property rights must be express and approved by Intel * in writing. * */ /* CGESV Example. ============== The program computes the solution to the system of linear equations with a square matrix A and multiple right-hand sides B, where A is the coefficient matrix: ( 1.23, -5.50) ( 7.91, -5.38) ( -9.80, -4.86) ( -7.32, 7.57) ( -2.14, -1.12) ( -9.92, -0.79) ( -9.18, -1.12) ( 1.37, 0.43) ( -4.30, -7.10) ( -6.47, 2.52) ( -6.51, -2.67) ( -5.86, 7.38) ( 1.27, 7.29) ( 8.90, 6.92) ( -8.82, 1.25) ( 5.41, 5.37) and B is the right-hand side matrix: ( 8.33, -7.32) ( -6.11, -3.81) ( -6.18, -4.80) ( 0.14, -7.71) ( -5.71, -2.80) ( 1.41, 3.40) ( -1.60, 3.08) ( 8.54, -4.05) Description. ============ The routine solves for X the system of linear equations A*X = B, where A is an n-by-n matrix, the columns of matrix B are individual right-hand sides, and the columns of X are the corresponding solutions. The LU decomposition with partial pivoting and row interchanges is used to factor A as A = P*L*U, where P is a permutation matrix, L is unit lower triangular, and U is upper triangular. The factored form of A is then used to solve the system of equations A*X = B. Example Program Results. ======================== CGESV Example Program Results Solution ( -1.09, -0.18) ( 1.28, 1.21) ( 0.97, 0.52) ( -0.22, -0.97) ( -0.20, 0.19) ( 0.53, 1.36) ( -0.59, 0.92) ( 2.22, -1.00) Details of LU factorization ( -4.30, -7.10) ( -6.47, 2.52) ( -6.51, -2.67) ( -5.86, 7.38) ( 0.49, 0.47) ( 12.26, -3.57) ( -7.87, -0.49) ( -0.98, 6.71) ( 0.25, -0.15) ( -0.60, -0.37) (-11.70, -4.64) ( -1.35, 1.38) ( -0.83, -0.32) ( 0.05, 0.58) ( 0.93, -0.50) ( 2.66, 7.86) Pivot indices 3 3 3 4 */ #include <stdlib.h> #include <stdio.h> /* Complex datatype */ struct _fcomplex { 
     float re, im; }; typedef struct _fcomplex fcomplex; /* CGESV prototype */ extern void cgesv( int* n, int* nrhs, fcomplex* a, int* lda, int* ipiv, fcomplex* b, int* ldb, int* info ); /* Auxiliary routines prototypes */ extern void print_matrix( char* desc, int m, int n, fcomplex* a, int lda ); extern void print_int_vector( char* desc, int n, int* a ); /* Parameters */ #define N 4 #define NRHS 2 #define LDA N #define LDB N /* Main program */ int main() { 
     /* Locals */ int n = N, nrhs = NRHS, lda = LDA, ldb = LDB, info; /* Local arrays */ int ipiv[N]; fcomplex a[LDA*N] = { 
     { 
     1.23f, -5.50f}, { 
    -2.14f, -1.12f}, { 
    -4.30f, -7.10f}, { 
     1.27f, 7.29f}, { 
     7.91f, -5.38f}, { 
    -9.92f, -0.79f}, { 
    -6.47f, 2.52f}, { 
     8.90f, 6.92f}, { 
    -9.80f, -4.86f}, { 
    -9.18f, -1.12f}, { 
    -6.51f, -2.67f}, { 
    -8.82f, 1.25f}, { 
    -7.32f, 7.57f}, { 
     1.37f, 0.43f}, { 
    -5.86f, 7.38f}, { 
     5.41f, 5.37f} }; fcomplex b[LDB*NRHS] = { 
     { 
     8.33f, -7.32f}, { 
    -6.18f, -4.80f}, { 
    -5.71f, -2.80f}, { 
    -1.60f, 3.08f}, { 
    -6.11f, -3.81f}, { 
     0.14f, -7.71f}, { 
     1.41f, 3.40f}, { 
     8.54f, -4.05f} }; /* Executable statements */ printf( " CGESV Example Program Results\n" ); /* Solve the equations A*X = B */ cgesv( &n, &nrhs, a, &lda, ipiv, b, &ldb, &info ); /* Check for the exact singularity */ if( info > 0 ) { 
     printf( "The diagonal element of the triangular factor of A,\n" ); printf( "U(%i,%i) is zero, so that A is singular;\n", info, info ); printf( "the solution could not be computed.\n" ); exit( 1 ); } /* Print solution */ print_matrix( "Solution", n, nrhs, b, ldb ); /* Print details of LU factorization */ print_matrix( "Details of LU factorization", n, n, a, lda ); /* Print pivot indices */ print_int_vector( "Pivot indices", n, ipiv ); exit( 0 ); } /* End of CGESV Example */ /* Auxiliary routine: printing a matrix */ void print_matrix( char* desc, int m, int n, fcomplex* a, int lda ) { 
     int i, j; printf( "\n %s\n", desc ); for( i = 0; i < m; i++ ) { 
     for( j = 0; j < n; j++ ) printf( " (%6.2f,%6.2f)", a[i+j*lda].re, a[i+j*lda].im ); printf( "\n" ); } } /* Auxiliary routine: printing a vector of integers */ void print_int_vector( char* desc, int n, int* a ) { 
     int j; printf( "\n %s\n", desc ); for( j = 0; j < n; j++ ) printf( " %6i", a[j] ); printf( "\n" ); } 

2.生成makefile文件

TARGET = test CFLAGS = -std=c99 # -I 指定头文件路径 CFLAGS += -I/opt/intel/oneapi/mkl/latest/include # -L 指定运行库路径和编译参数 LDFLAGS = -L/opt/intel/oneapi/mkl/latest/lib -lmkl_rt #LDFLAGS += -lm -lpthread test: main.o gcc -o test main.o $(LDFLAGS) main.o: main.c gcc -c main.c $(CFLAGS) clean: rm -f *.o test 

编译时要指定头文件路径、动态库路径以及编译参数，这点很重要！

3.make编译
现在有两个文件

main.c makefile 

编译

make 

运行生成的可执行文件test

./test 

输出结果

CGESV Example Program Results Solution ( -1.09, -0.18) ( 1.28, 1.21) ( 0.97, 0.52) ( -0.22, -0.97) ( -0.20, 0.19) ( 0.53, 1.36) ( -0.59, 0.92) ( 2.22, -1.00) Details of LU factorization ( -4.30, -7.10) ( -6.47, 2.52) ( -6.51, -2.67) ( -5.86, 7.38) ( 0.49, 0.47) ( 12.26, -3.57) ( -7.87, -0.49) ( -0.98, 6.71) ( 0.25, -0.15) ( -0.60, -0.37) (-11.70, -4.64) ( -1.35, 1.38) ( -0.83, -0.32) ( 0.05, 0.58) ( 0.93, -0.50) ( 2.66, 7.86) Pivot indices 3 3 3 4 

总结

以上就是今天要讲的内容，本文主要介绍了怎么链接intel的MKL库。