The jobfile is essentially a fileĬontaining stress-ng options (without the leading -) with one option per job jobfile run stressors using a jobfile. Number of I/O requests that have been issued to the Working directory or the -temp-path specified path. iostat S every S seconds show I/O statistics on the device that stores the For besteffort or realtime values 0 (highest priority) to 7 Level specify ionice level (only on Linux). ionice-classĬlass specify ionice class (only on Linux). Works for Intel P-State enabled x86 systems on Linux. Privilege to alter various /sys interface controls. ignite-cpu alter kernel controls to try and maximize the CPU. This is only as accurate as the kernelįtrace output, so there may be some variability on the data reported. This will use the kernelĭebugfs ftrace mechanism to record all the kernel functions used on the ftrace enable kernel function call tracing (Linux only).

n, -dry-run parse options, but do not run stress tests. class vm?) will print out all the stressors in that specificĬlass. Specifying a name followed by a question mark (for example Selecting a specificĬlass will run all the stressors that fall into that class only when run 'memory' classes as it exercises all these three. Other stressors fall into more than one class, forĮxample, the 'lsearch' stressor falls into the 'cpu', 'cpu-cache' and Interrupt, filesystem, memory, network, os, pipe, scheduler and vm. Or more of the following classes: cpu, cpu-cache, device, gpu, io, class name specify the class of stressors to run. ThisĪllows one to ramp up the stress tests over time.

b N, -backoff N wait N microseconds between the start of each stress worker process. Is zero, then the number of configured CPUs in the system is used. Then the number of CPUs online is used for the number of instances. N start N instances of all stressors in parallel. Tests down, increase latencies and reduce the number of bogo ops as wellĪs changing the balance of user time vs system time used depending on the aggressive enables more file, cache and memory aggressive options. Other stressor terminates prematurely because of a failure. General stress-ng control options: -abort this option will force all running stressors to abort (terminate) if any Zero then the number of online CPUs is used. Stress test specifying a zero value will select the number of processorsĪvailable as defined by sysconf(_SC_NPROCESSORS_CONF), if that can't beĭetermined then the number of online CPUs is used. One can specify the number of processes to invoke per type of Stress-ng can allow the ionice class and ionice levels to be adjusted, Settings on Linux systems to make the stressors unkillable in low memory Running stress-ng with root privileges will adjust out of memory Used as a precise benchmark test suite, so do NOT use it in this manner. However, it has never been intended to be Useful to observe performance changes across different operating system Stress-ng can also measure test throughput rates this can be With caution as some of the tests can make a system run hot on poorlyĭesigned hardware and also can cause excessive system thrashing which may be Trip hardware issues such as thermal overruns as well as operating systemīugs that only occur when a system is being thrashed hard. Stress-ng was originally intended to make a machine work hard and Integer, bit manipulation and control flow. Has a wide range of CPU specific stress tests that exercise floating point, It was designed to exercise various physical subsystems of a computerĪs well as the various operating system kernel interfaces. Stress-ng will stress test a computer system in various selectable Stress-ng - a tool to load and stress a computer system

Cpu stress test tool