給你的Linux系統上點stress【轉】

轉自：https://blog.csdn.net/sunvince/article/details/7187768

from: http://blog.yufeng.info/archives/2023

 

 

這本書介紹了很是多的調試手段和工具， 其中提到了stress這個簡單的工具，在咱們的平常工做中頗有用。利用它能夠給咱們的系統施加CPU，內存,IO和磁盤的壓力，在模擬極端場景給應用系統形成的壓力方面頗有幫助。

主頁見這裏：http://weather.ou.edu/~apw/projects/stress/

stress is a deliberately simple workload generator for POSIX systems. It imposes a configurable amount of CPU, memory, I/O, and disk stress on the system. It is written in C, and is free software licensed under the GPLv2.

這個stress實現很是的簡單，全部的功能在一個.c文件裏面實現， 系統運行的時候會fork多個子進程，分別進行CPU,內存，IO方面的折磨。

由於簡單因此穩定。參考例子：

$ stress –cpu 2 –io 1 –vm 1 –vm-bytes 128M –timeout 10s –verbose
stress: info: [9372] dispatching hogs: 2 cpu, 1 io, 1 vm, 0 hdd
stress: dbug: [9372] (243) using backoff sleep of 12000us
stress: dbug: [9372] (262) setting timeout to 10s
stress: dbug: [9372] (285) –> hogcpu worker 9373 forked
stress: dbug: [9372] (305) –> hogio worker 9374 forked
stress: dbug: [9372] (325) –> hogvm worker 9375 forked
stress: dbug: [9372] (243) using backoff sleep of 3000us
stress: dbug: [9372] (262) setting timeout to 10s
stress: dbug: [9372] (285) –> hogcpu worker 9376 forked
stress: dbug: [9375] (466) hogvm worker malloced 134217728 bytes
stress: dbug: [9372] (382) <-- worker 9374 signalled normally
stress: dbug: [9372] (382) <-- worker 9373 signalled normally
stress: dbug: [9372] (382) <-- worker 9375 signalled normally
stress: dbug: [9372] (382) <-- worker 9376 signalled normally
stress: info: [9372] successful run completed in 10s

因爲stress支持posix平臺，簡單的下載，編譯和安裝就行了, 很順利！
按照文檔默認的運行參數，讓系統來點體驗：

$stress --cpu 8 --io 4 --vm 2 --vm-bytes 128M --timeout 10d

stress: info: [23176] dispatching hogs: 8 cpu, 4 io, 2 vm, 0 hdd

pstree能夠看到：

nmon能夠看到：

具體使用能夠參考man stress！