Lookbusy 是一个用于在 Linux 系统上生成合成负载的简单应用程序。它可以在 CPU 上生成固定的、可预测的负载，保持选定数量的内存处于活动状态，并生成您需要的任意数量的磁盘流量。

官方地址：lookbusy -- a synthetic load generator

编译

arm编译

./configure --host=arm-linux-gnueabihf LDFLAGS=-static  # --host指定gcc版本，LDFLAGS指定静态编译
make
make install 

x86编译

./configure 
make
make install 

使用

官方指令

usage: lookbusy [ -h ] [ options ]
General options:-h, --help           Commandline help (you're reading it)-v, --verbose        Verbose output (may be repeated)-q, --quiet          Be quiet, produce output on errors only
CPU usage options:-c, --cpu-util=PCT,  Desired utilization of each CPU, in percent (default--cpu-util=RANGE   50%).  If 'curve' CPU usage mode is chosen, a rangeof the form MIN-MAX should be given.-n, --ncpus=NUM      Number of CPUs to keep busy (default: autodetected)-r, --cpu-mode=MODE  Utilization mode ('fixed' or 'curve', see lookbusy(1))-p, --cpu-curve-peak=TIMEOffset of peak utilization within curve period, inseconds (append 'm', 'h', 'd' for other units)-P, --cpu-curve-period=TIMEDuration of utilization curve period, in seconds (append'm', 'h', 'd' for other units)
Memory usage options:-m, --mem-util=SIZE   Amount of memory to use (in bytes, followed by KB, MB,or GB for other units; see lookbusy(1))-M, --mem-sleep=TIME Time to sleep between iterations, in usec (default 1000)
Disk usage options:-d, --disk-util=SIZE Size of files to use for disk churn (in bytes,followed by KB, MB, GB or TB for other units)-b, --disk-block-size=SIZESize of blocks to use for I/O (in bytes, followedby KB, MB or GB)-D, --disk-sleep=TIMETime to sleep between iterations, in msec (default 100)-f, --disk-path=PATH Path to a file/directory to use as a buffer (default/tmp); specify multiple times for additional paths

lookbusy -c 60 # 占用所有 CPU 核心各 60%
lookbusy -c 50 -n 2 # 占用两个 CPU 核心各 50%
lookbusy -c 50-80 -r curve # 占用所有 CPU 核心在 50%-80% 左右浮动
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效果