| Version 8 (modified by jazz, 15 years ago) (diff) |
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實作八： MPICH 實作練習
- 使用你的帳號登入: ym
login as: ym24 ym24@bio.classcloud.org's password: ****** ym24@bio001:~$ ssh-keygen -t rsa
- 產生 SSH 認證金鑰
Generating public/private rsa key pair. Enter file in which to save the key (/home/ym24/.ssh/id_rsa): <<< 請按 Enter Created directory '/home/ym24/.ssh'. Enter passphrase (empty for no passphrase): <<< 請按 Enter Enter same passphrase again: <<< 請按 Enter Your identification has been saved in /home/ym24/.ssh/id_rsa. Your public key has been saved in /home/ym24/.ssh/id_rsa.pub. The key fingerprint is: 2a:6c:05:f8:24:38:db:79:b9:4f:0c:74:da:c5:16:05 ym24@bio001
- 進行金鑰交換
ym24@bio001:~$ cp .ssh/id_rsa.pub .ssh/authorized_keys
- 設定 MPD 設定檔跟 MPI 的執行檔路徑
ym24@bio001:~$ echo "MPD_SECRETWORD=${user}$$" > ~/.mpd.conf ym24@bio001:~$ chmod 600 .mpd.conf ym24@bio001:~$ for ((i=2;i<=12;i++)); do echo "192.168.129.$i" >> mpd.hosts; done ym24@bio001:~$ export PATH=$PATH:/opt/mpich2/bin ym24@bio001:~$ which mpdboot /opt/mpich2/bin/mpdboot - 設定 dsh (distributed shell)*, 我們可以使用 dsh 指令逐台執行.
ym24@bio001:~$ mkdir -p .dsh/ ym24@bio001:~$ cp mpd.hosts .dsh/machines.list ym24@bio001:~$ dsh -a hostname
- 用使用者的身分執行 mpd
ym24@bio001:~$ mpdboot -n 7
- 用 mpdtrace 檢查 mpd 執行狀態
ym24@bio001:~$ mpdtrace bio002 bio006 bio012 bio011 bio005 bio004 bio003 bio010 bio009 bio008 bio007
- 用 mpdringtest 做 mpd 訊息傳遞效能測試
ym24@bio002:~$ mpdringtest 1000 time for 1000 loops = 1.07995414734 seconds
- 用 mpiexec 執行 cpi 範例程式
ym24@bio001:~$ mpiexec -n 3 /opt/mpich2/share/mpich2/examples/cpi Process 0 of 1 is on bio001 pi is approximately 3.1415926544231341, Error is 0.0000000008333410 wall clock time = 0.000295 Process 0 of 1 is on bio001 pi is approximately 3.1415926544231341, Error is 0.0000000008333410 wall clock time = 0.000287 Process 0 of 1 is on bio001 pi is approximately 3.1415926544231341, Error is 0.0000000008333410 wall clock time = 0.000277
- 貼上 test1.c
ym24@bio001:~$ cat << EOF > test1.c #include <stdio.h> #include <mpi.h> main (int argc, char **argv) { int rank, size, len; char name[MPI_MAX_PROCESSOR_NAME]; MPI_Init(&argc, &argv); int myid, numprocs; /* 取得 node 總數 */ MPI_Comm_size(MPI_COMM_WORLD,&numprocs); /* 取得本身 node id / rank */ MPI_Comm_rank(MPI_COMM_WORLD,&myid); /* 取得本身 host name */ MPI_Get_processor_name(name, &len); printf("This is machine %d of %d name = %s\n", myid, numprocs, name); MPI_Finalize(); } EOF
