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I have used many times ab for measuring web performance, hdparm for measuring hard disk performance and netperf for measuring network performance.

But I didn't find any tools to measure cpu performance.

Do you know a tool allowing to measure cpu performance? I am more specifically looking to measure Gflops.

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You should take a look at the Wikipedia page on benchmarking, it gives quite a few benchmark tools including the CPU ones that will work on Linux. LinPack is free but a pain to compile. But you can certainly look at NBench and some others in the list.

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  • NBench is good, but 15 year old code. We need something new. The link is stale BTW.
    – Konrad Gajewski
    Aug 21, 2019 at 15:58
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$ date; i=0; while (( i < 1000000 )); do (( i ++ )); done; date
Tue Jul 15 11:26:37 EDT 2014
Tue Jul 15 11:26:43 EDT 2014
$
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    Would that be 43 - 37 = 6 GigaFlops? I fail to see how an integer increment in a shell, relates to floating point performance.
    – Anthon
    Jul 15, 2014 at 16:58
  • The general goal was "measure cpu performance". Later mentions Gflops but I think that's actually a misguided tangent. If Gflops was the true goal then asking about CPU performance was a mistake.
    – JohnMudd
    Jul 16, 2014 at 15:29
  • Quicker way to get to the number you're really after, i.e. seconds that have passed: DATE=$(date +%s); i=0; while (( i < 1000000 )); do (( i ++ )); done; echo $(( $(date +%s)-DATE ))
    – xenithorb
    Mar 7, 2015 at 21:23
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    Good point, I should have updated this earlier. Here's my current approach: time ( i=0; while (( i < 1000000 )); do (( i ++ )); done )
    – JohnMudd
    Mar 9, 2015 at 12:58
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    This is not 6 gigaflops, this is ~0.17 megabashincrements. And, my macbook owns all: ( i=0 ; while (( i < 1000000 )); do; (( i ++ )); done; ) 1.33s user 0.00s system 99% cpu 1.337 total
    – Steven Lu
    Jan 29, 2016 at 16:39
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stress-ng is a simple tool that can stress and benchmark the cpus.

For example, tested 1 cpu

stress-ng -c 1 --cpu-ops 5000

stress-ng: info: [20288] defaulting to a 86400 second run per stressor

stress-ng: info: [20288] dispatching hogs: 1 cpu

stress-ng: info: [20288] successful run completed in 13.93s

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  • I think advising a stress testing program to benchmark is misleading: there is a big difference between benchmarking and stressing a CPU.
    – Paradox
    Mar 10, 2019 at 23:39

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