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 range
of 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=TIME
Offset of peak utilization within curve period, in
seconds (append 'm', 'h', 'd' for other units)
-P, --cpu-curve-period=TIME
Duration 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=SIZE
Size of blocks to use for I/O (in bytes, followed
by KB, MB or GB)
-D, --disk-sleep=TIME
Time 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 pathslookbusy -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
