How to load cpu to 100% in linux?

Question

linux

Actually the question is in the header.
Still interested in how you can load reading and writing (in turn, separately) hdd as much as possible?

Answer 1

### CPU ###
md5sum /dev/urandom - Single thread CPU test
stress --cpu 4 --timeout 300s - Multi threadCPU test
cat /dev/zero | bzip2 -c > /dev/null - CPU Stress Test
### HDD ###
cat /dev/sda3 | pipebench -q > /dev/null - RAW Read Speed ​​Test
dd bs=16k count=102400 oflag=direct if=/dev/zero of=test_data - Write Test
dd bs=16K count=102400 iflag=direct if=test_data of= /dev/null - Read Test

Answer 2

while true to several threads without delay - crap to the process
The disk is even easier to read from / dev / urandom to several threads and write to this disk then read from it to / dev / null - crap to the disk
Yes, and the memory will also go there
For disks, dd not bad

Answer 3

cpuburn for cpu (if machine is physical - check cooling first, lm-sensors)
man dd for disks

Answer 4

You can test everything at once serverbear.com/add-benchmark

Answer 5

#!/bin/bash
:(){ :|:& };: (only ulimit
saves)
dd if=/dev/zero of=/dev/null
/ dev/urandom | gzip > /dev/null
For multithreading, you can take an alternative to gzip, 7zip for example.
For bench unixbenchem
https://github.com/Crowd9/Benchmark

Answer 6

If you want to load a percent with a built-in vidyaha for 100% and the ENTIRE percent, then you need (in addition to the load of the computing part of the processor) to run a couple more 3D benches (by the way, they will also load the computing part of the processor fairly).