stress man page

stress — tool to impose load on and stress test systems


stress [OPTION [ARG]] ...


`stress' imposes certain types of compute stress on your system

-?, --help

show this help statement


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)


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).

See Also

The full documentation for stress is maintained as a Texinfo manual.  If the info and stress programs are properly installed at your site, the command

info stress

should give you access to the complete manual.

Referenced By


March 2010 stress 1.0.4 User Commands