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这篇文章主要讲解了“怎么使用 Linux 平台下的压力测试工具 stress-ng”，文中的讲解内容简单清晰，易于学习与理解，下面请大家跟着丸趣 TV 小编的思路慢慢深入，一起来研究和学习“怎么使用 Linux 平台下的压力测试工具 stress-ng”吧！
安装很简单, 在 CentOS 下, 通过 yum -y install stress-ng 即可安装此工具.
安装成功后, 执行 man stress-ng 可查看该工具的帮助信息.
NAME
stress-ng - a tool to load and stress a computer system
stress-ng 是计算机系统进行压力测试的工具.
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 中途径对系统进行测试. 该工具可运行计算机的各种物理子系统 (如 CPU/ 内存 / 网络等)
以及各种 OS 内核接口.stress-ng 有大量的 CPU 压力测试方法, 包括测试浮点数 / 整数 / 位运算和控制流程等.
stress-ng 的最初目的是给机器加压, 通过使系统过载来发现 OS 的 bug. 要注意的是,stress-ng 在设计不良
的系统中运行可能会系统宕机.
OPTIONS
General stress-ng control options:
...
详细可参考 stress-ng 手册.
EXAMPLES
使用样例
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.
执行 8 个虚拟的内存压测器, 合计使用 80% 的可用内存, 持续时间 1 小时, 每个压测器约 10% 的可用内存.
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.感谢各位的阅读，以上就是“怎么使用 Linux 平台下的压力测试工具 stress-ng”的内容了，经过本文的学习后，相信大家对怎么使用 Linux 平台下的压力测试工具 stress-ng 这一问题有了更深刻的体会，具体使用情况还需要大家实践验证。这里是丸趣 TV，丸趣 TV 小编将为大家推送更多相关知识点的文章，欢迎关注！
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