Stress Test for Linux

stress_test.md

A. stress

Install

sudo yum install stress

ex.1) CPUに負荷をかける例(2つのstressプロセスが起動し、2分間sqrt()を実行する．)

sudo stress --cpu 2 --timeout 2m

ex.2) メモリを利用しまくる例(2つのstressプロセスが起動し、1つのプロセスあたり1GBのメモリを2分間利用し続ける)

stress --vm 2 --vm-bytes 1G --timeout 2m

help

sudo stress --help
`stress' imposes certain types of compute stress on your system

Usage: stress [OPTION [ARG]] ...
 -?, --help         show this help statement
     --version      show version statement
 -v, --verbose      be verbose
 -q, --quiet        be quiet
 -n, --dry-run      show what would have been done
 -t, --timeout N    timeout after N seconds
     --backoff N    wait factor of N microseconds before work starts
 -c, --cpu N        spawn N workers spinning on sqrt()
 -i, --io N         spawn N workers spinning on sync()
 -m, --vm N         spawn N workers spinning on malloc()/free()
     --vm-bytes B   malloc B bytes per vm worker (default is 256MB)
     --vm-stride B  touch a byte every B bytes (default is 4096)
     --vm-hang N    sleep N secs before free (default none, 0 is inf)
     --vm-keep      redirty memory instead of freeing and reallocating
 -d, --hdd N        spawn N workers spinning on write()/unlink()
     --hdd-bytes B  write B bytes per hdd worker (default is 1GB)

Example: stress --cpu 8 --io 4 --vm 2 --vm-bytes 128M --timeout 10s

Note: Numbers may be suffixed with s,m,h,d,y (time) or B,K,M,G (size).

B. stress を使わない場合

$ yes > /dev/null

確認

$ ps aux | grep yes | grep -v grep
$ top
# kill Process ID
$ kill PID