最後更新: 2019-05-15

介紹

stress 是系統壓力測試工具

它有兩個版本

• stress (CPU, memory, I/O, and disk stress)
• stress-ng
   - Cache thrashing,
   - Socket stressing,
   - Context switching,
   - Process creation & termination
   - CPU specific stress tests

stress

Opts

-n, --dry-run              # show what would have been done

-t, --timeout N            # timeout after N seconds (Unit: s,m,h,d,y)

測試什麼

-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: 256Mbyte; Unit: b, k, m,g)

--vm-hang N               # sleep N secs before free

-d, --hdd N                 # spawn N workers spinning on write()/unlink()

--hdd-bytes B             # write B bytes per hdd worker (default is 1GB)

Example

[1] 60 second 100% loading on 1 cpu core

stress -t 60 -c 1

[2] 60 second 1 G memory stress test

stress -t 60 --vm 1 --vm-bytes 1G

stress: info: [11816] dispatching hogs: 0 cpu, 0 io, 1 vm, 0 hdd
stress: info: [11816] successful run completed in 60s

stress-ng

Install

apt-get install stress-ng

Testing

stress-ng -c 4

stress-ng: info:  [10422] defaulting to a 86400 second run per stressor
stress-ng: info:  [10422] dispatching hogs: 4 cpu
stress-ng: info:  [10422] cache allocate: default cache size: 2048K

# 1 worker with 200 MBytes

stress-ng -m 1 --vm-bytes 200m