Stress-NG – Tool to load and stress your Ubuntu system

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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 various operating system kernel interfaces. Stress-ng features:

almost 80 different stress tests
over 50 CPU specific stress tests that exercise floating point, integer, bit manipulation and control flow
over 20 virtual memory stress tests

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 hardware. 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 apropriate 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; specifying a negative or zero value will select the number of online processors as defined by sysconf(_SC_NPROCESSORS_ONLN).

Install stress-ng on ubuntu

Open the terminal and run the following command

sudo apt-get install stress-ng

Using stress-ng


stress-ng [OPTION [ARG]] ...

CPU specific stress methods

These can be specified using the --cpu-method option


stress-ng --cpu 4 --io 2 --vm 1 --vm-bytes 256M --timeout 60s

stress-ng --cpu 8 --cpu-ops 800000

stress-ng --cpu 4 --io 2 --timeout 60s --metrics

VM specific stress methods

These can be specified using the --vm-method option

stress-ng --vm 32 --vm-bytes 64M --vm-stride 1K --vm-populate --page-in --metrics-brief --times --timeout 60s

More Examples

stress-ng --fork 4 --fork-ops 100000

stress-ng --all 4 --timeout 5m

stress-ng --random 64

Check Stress-NG documentation for more details.

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