1NAME='Stress' 2AUTHOR='Yi Yang <yang.y.yi@gmail.com>' 3TEST_TYPE='client' 4TIME='MEDIUM' 5TEST_CATEGORY='Functional' 6TEST_CLASS='Software' 7DOC='''\ 8stress is not a benchmark, but is rather a tool designed to put given subsytems 9under a specified load. Instances in which this is useful include those in 10which a system administrator wishes to perform tuning activities, a kernel or 11libc programmer wishes to evaluate denial of service possibilities, etc. 12 13Stress command line options: 14 15 -?, --help show this help statement 16 --version show version statement 17 -v, --verbose be verbose 18 -q, --quiet be quiet 19 -n, --dry-run show what would have been done 20 -t, --timeout N timeout after N seconds 21 --backoff N wait factor of N microseconds before work starts 22 -c, --cpu N spawn N workers spinning on sqrt() 23 -i, --io N spawn N workers spinning on sync() 24 -m, --vm N spawn N workers spinning on malloc()/free() 25 --vm-bytes B malloc B bytes per vm worker (default is 256MB) 26 --vm-stride B touch a byte every B bytes (default is 4096) 27 --vm-hang N sleep N secs before free (default is none, 0 is inf) 28 --vm-keep redirty memory instead of freeing and reallocating 29 -d, --hdd N spawn N workers spinning on write()/unlink() 30 --hdd-bytes B write B bytes per hdd worker (default is 1GB) 31 --hdd-noclean do not unlink files created by hdd workers 32 Example: %s --cpu 8 --io 4 --vm 2 --vm-bytes 128M --timeout 10s 33 Note: Numbers may be suffixed with s,m,h,d,y (time) or B,K,M,G (size). 34 35Autotest module options: 36 args = Arguments passed to the stress test. If omitted, an heuristic 37 will be used to calculate sensible defaults 38 stress_length = Time length on which stress will run, in seconds. 39 By default is 60s. 40''' 41job.run_test('stress') 42