STRESS(1)							   User Commands							 STRESS(1)

NAME

       stress - tool to impose load on and stress test systems

SYNOPSIS

       stress [OPTION [ARG]] ...

DESCRIPTION

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

       -?, --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 is 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)

       --hdd-noclean
	      do not unlink files created by hdd workers

       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.

stress 1.0.1							    August 2009 							 STRESS(1)