linux安装mpich
为了做课设，不得不安装个mpich，找了好久方法。下面简单介绍下安装方法[*] yum安装，这是比较简单的安装方式
注意：先要配置好yum的网络源安装epel-release扩展源，我试了下本地的貌似没安装成功
# yum -y install mpich-3.2-devel.x86_64 mpich-3.2-devel.x86_64 mpich-3.2-doc.noarch
安装好之后是找不到命令的，需要手动配置环境变量
# find / -name "mpicc"
/usr/lib64/mpich-3.2/bin/mpicc
先搜索一下安装路径
设置环境变量：
在 /etc/profile添加一下内容：
PATH=$PATH://usr/lib64/mpich-3.2/bin/
刷新一下：
source /etc/profile
命令就可直接使用了
新建一个文件test.c
# cat test.c
#include
#include
#include
int main(int argc,char* argv[])
{
int myid, numprocs;
int namelen;
char processor_name;
MPI_Init(&argc,&argv);/* 初始化并行环境 */
MPI_Comm_rank(MPI_COMM_WORLD,&myid);/* 当前进程的ID号 */
MPI_Comm_size(MPI_COMM_WORLD,&numprocs);/* 进程的总數 */
MPI_Get_processor_name(processor_name,&namelen);/* 当前处理器的名称 */
fprintf(stderr,"Hello World! Process %d of %d on %s\n",
myid, numprocs, processor_name);
MPI_Finalize();/* 结束并行环境 */
return 0;
}
# mpicc -o hello test.c
# mpirun -np 4 ./hello
Fatal error in MPI_Init: Other MPI error, error stack:
MPIR_Init_thread(474)..............:
MPID_Init(190).....................: channel initialization failed
MPIDI_CH3_Init(89).................:
MPID_nem_init(320).................:
MPID_nem_tcp_init(173).............:
MPID_nem_tcp_get_business_card(420):
MPID_nem_tcp_init(379).............: gethostbyname failed, c1 (errno 1)
但是这里运行还是会报错，原因在于，没有配置好域名解析：
需要配置域名解析
在/etsc/hosts中与/etc/hostname中的名字需要一致，贴出我的配置
# cat /etc/hosts
127.0.0.1 host
::1 localhost
# cat /etc/hostname
host
可以通过ssh 连接host 如果连接成功说明配置成功
接下来就可运行了
# mpirun -np 4 ./hello
Hello World! Process 0 of 4 on host
Hello World! Process 2 of 4 on host
Hello World! Process 1 of 4 on host
Hello World! Process 3 of 4 on host
2. 源码安装mpich
# wget http://www.mpich.org/static/downloads/3.2/mpich-3.2.tar.gz
--2018-05-28 18:06:45--http://www.mpich.org/static/downloads/3.2/mpich-3.2.tar.gz
正在解析主机 www.mpich.org (www.mpich.org)... 140.221.6.71
正在连接 www.mpich.org (www.mpich.org)|140.221.6.71|:80... 已连接。
已发出 HTTP 请求，正在等待回应... 200 OK
长度：11862150 (11M)
正在保存至: “mpich-3.2.tar.gz”
100%[=====================================================>] 11,862,150 213KB/s 用时 54s
2018-05-28 18:07:40 (215 KB/s) - 已保存 “mpich-3.2.tar.gz” )
[# tar zxf mpich-3.2.tar.gz
# ls
anaconda-ks.cfginitial-setup-ks.cfgmpich-3.2mpich-3.2.tar.gz
# cd mpich-3.2/
# ls
aclocal.m4configure doc Makefile.in mpi.def src
autogen.shconfigure.acexamples man README subsys_include.m4
CHANGES contrib maint mpich.def README.envvartest
confdb COPYRIGHT Makefile.ammpich-doxygen.inRELEASE_NOTESwww
编译
# ./configure --prefix=/usr/local/mpich
………………..
config.status: executing default-4 commands
Configuration completed. //中间一大串，看见这个就成功了
安装：
注意：中间如果报错，可能是缺少gcc、build-essential依赖，yum直接安装就行了
# make && make install
安装成功后同样找不到命令，还是需要配置环境变量
# ls /usr/local/mpich/bin/* //这是之前指定的安装目录
/usr/local/mpich/bin/hydra_nameserver/usr/local/mpich/bin/mpiexec.hydra
/usr/local/mpich/bin/hydra_persist /usr/local/mpich/bin/mpif77
/usr/local/mpich/bin/hydra_pmi_proxy /usr/local/mpich/bin/mpif90
/usr/local/mpich/bin/mpic++ /usr/local/mpich/bin/mpifort
/usr/local/mpich/bin/mpicc /usr/local/mpich/bin/mpirun
/usr/local/mpich/bin/mpichversion /usr/local/mpich/bin/mpivars
/usr/local/mpich/bin/mpicxx /usr/local/mpich/bin/parkill
/usr/local/mpich/bin/mpiexec
添加环境和之前一样
# tail -1 /etc/profile
PATH=$PATH:/usr/local/mpich/bin/
# source /etc/profile
这会儿就能看到mpicc的命令了。。。成功了
测试下：（还是利用上面那个例子）
# mpicc -o test test.c
# mpirun -np 4 ./test
Fatal error in MPI_Init: Other MPI error, error stack:
MPIR_Init_thread(474)..............:
MPID_Init(190).....................: channel initialization failed
MPIDI_CH3_Init(89).................:
MPID_nem_init(320).................:
MPID_nem_tcp_init(173).............:
MPID_nem_tcp_get_business_card(420):
MPID_nem_tcp_init(379).............: gethostbyname failed, c1 (errno 1)
同样报错…….
但是解决方法和上面那个完全一样，都是host名字设置不一样造成的
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