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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.

3
$ 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 '14 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 '14 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 '15 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 '15 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 '16 at 16:39
1

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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