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這篇文章主要講解了“怎么使用 Linux 平臺下的壓力測試工具 stress-ng”,文中的講解內容簡單清晰,易于學習與理解,下面請大家跟著丸趣 TV 小編的思路慢慢深入,一起來研究和學習“怎么使用 Linux 平臺下的壓力測試工具 stress-ng”吧!
安裝很簡單, 在 CentOS 下, 通過 yum -y install stress-ng 即可安裝此工具.
安裝成功后, 執(zhí)行 man stress-ng 可查看該工具的幫助信息.
NAME
stress-ng - a tool to load and stress a computer system
stress-ng 是計算機系統(tǒng)進行壓力測試的工具.
SYNOPSIS
stress-ng [OPTION [ARG]] ...
使用方法:stress-ng [OPTION [ARG]] ...
DESCRIPTION
stress-ng will stress test a computer system in various selectable ways. It was
designed to exercise various physical subsystems of a computer as well as the var‐
ious operating system kernel interfaces. stress-ng also has a wide range of CPU
specific stress tests that exercise floating point, integer, bit manipulation and
control flow.
stress-ng was originally intended to make a machine work hard and trip hardware
issues such as thermal overruns as well as operating system bugs that only occur
when a system is being thrashed hard. Use stress-ng with caution as some of the
tests can make a system run hot on poorly designed hardware and also can cause
excessive system thrashing which may be difficult to stop.
stress-ng can also measure test throughput rates; this can be useful to observe
performance changes across different operating system releases or types of hard‐
ware. However, it has never been intended to be used as a precise benchmark test
suite, so do NOT use it in this manner.
Running stress-ng with root privileges will adjust out of memory settings on Linux
systems to make the stressors unkillable in low memory situations, so use this
judiciously. With the appropriate privilege, stress-ng can allow the ionice class
and ionice levels to be adjusted, again, this should be used with care.
One can specify the number of processes to invoke per type of stress test; speci‐
fying a negative or zero value will select the number of processors available as
defined by sysconf(_SC_NPROCESSORS_CONF).
stress-ng 提供了 N 中途徑對系統(tǒng)進行測試. 該工具可運行計算機的各種物理子系統(tǒng) (如 CPU/ 內存 / 網絡等)
以及各種 OS 內核接口.stress-ng 有大量的 CPU 壓力測試方法, 包括測試浮點數 / 整數 / 位運算和控制流程等.
stress-ng 的最初目的是給機器加壓, 通過使系統(tǒng)過載來發(fā)現 OS 的 bug. 要注意的是,stress-ng 在設計不良
的系統(tǒng)中運行可能會系統(tǒng)宕機.
OPTIONS
General stress-ng control options:
...
詳細可參考 stress-ng 手冊.
EXAMPLES
使用樣例
stress-ng --vm 8 --vm-bytes 80% -t 1h
run 8 virtual memory stressors that combined use 80% of the available mem‐
ory for 1 hour. Thus each stressor uses 10% of the available memory.
執(zhí)行 8 個虛擬的內存壓測器, 合計使用 80% 的可用內存, 持續(xù)時間 1 小時, 每個壓測器約 10% 的可用內存.
stress-ng --cpu 4 --io 2 --vm 1 --vm-bytes 1G --timeout 60s
runs for 60 seconds with 4 cpu stressors, 2 io stressors and 1 vm stressor
using 1GB of virtual memory.
stress-ng --iomix 2 --iomix-bytes 10% -t 10m
runs 2 instances of the mixed I/O stressors using a total of 10% of the
available file system space for 10 minutes. Each stressor will use 5% of
the available file system space.
stress-ng --cpu 8 --cpu-ops 800000
runs 8 cpu stressors and stops after 800000 bogo operations.
stress-ng --sequential 2 --timeout 2m --metrics
run 2 simultaneous instances of all the stressors sequentially one by one,
each for 2 minutes and summarise with performance metrics at the end.
stress-ng --cpu 4 --cpu-method fft --cpu-ops 10000 --metrics-brief
run 4 FFT cpu stressors, stop after 10000 bogo operations and produce a
summary just for the FFT results.
stress-ng --cpu 0 --cpu-method all -t 1h
run cpu stressors on all online CPUs working through all the available CPU
stressors for 1 hour.
stress-ng --all 4 --timeout 5m
run 4 instances of all the stressors for 5 minutes.
stress-ng --random 64
run 64 stressors that are randomly chosen from all the available stressors.
stress-ng --cpu 64 --cpu-method all --verify -t 10m --metrics-brief
run 64 instances of all the different cpu stressors and verify that the
computations are correct for 10 minutes with a bogo operations summary at
the end.
stress-ng --sequential 0 -t 10m
run all the stressors one by one for 10 minutes, with the number of
instances of each stressor matching the number of online CPUs.
stress-ng --sequential 8 --class io -t 5m --times
run all the stressors in the io class one by one for 5 minutes each, with 8
instances of each stressor running concurrently and show overall time util‐
isation statistics at the end of the run.
stress-ng --all 0 --maximize --aggressive
run all the stressors (1 instance of each per CPU) simultaneously, maximize
the settings (memory sizes, file allocations, etc.) and select the most
demanding/aggressive options.
stress-ng --random 32 -x numa,hdd,key
run 32 randomly selected stressors and exclude the numa, hdd and key stres‐
sors
stress-ng --sequential 4 --class vm --exclude bigheap,brk,stack
run 4 instances of the VM stressors one after each other, excluding the
bigheap, brk and stack stressors
stress-ng --taskset 0,2-3 --cpu 3
run 3 instances of the CPU stressor and pin them to CPUs 0, 2 and 3.
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