never use any of the following software before....just suggest based on reading online:
cyclictest: read this:
http://www.spinics.net/lists/linux-rt-users/msg04088.html (as explained within, "timer interrupt latency" is what is being measured by cyclictest.....not sure how it is done).
More on cyclictest:
http://people.redhat.com/williams/latency-howto/rt-latency-howto.txt (last section on different ways of using cyclictest for interrupt latency is covered.)
another:
https://github.com/atlas555/rt-test (interrupt_tool)
another is "intrperf" which originate from FreeBSD but there is a Linux version. google for it (https://repos.dcl.info.waseda.ac.jp/spumone/trac/wiki/Interrupt%20Latency%20of%20Linux%20(intrperf) ???).
As highlighted here:
interrupt latencies is really in such smaller order magnitude-wise, or due to low-level CPU feature like I-cache
that it is not easy nor worth the time tuning.....may be I am wrong.
Check this for another discussion:
On Sun, Mar 16, 2014 at 9:09 PM, loody <miloody@xxxxxxxxx> wrote:
-- hi peter:
2014-01-17 13:41 GMT+08:00 Peter Teoh <htmldeveloper@xxxxxxxxx>:
> http://stackoverflow.com/questions/15383259/are-there-any-kernel-tools-available-to-measure-interrupt-latency-with-reasonabl
>
> checkout cyclictest.
I have checked cyclictest.
from manual page, it seems used to calculate thread latency instead of
interrupt latency
Would you please let me know if there any kind of command for using it
to check interrupt latency ?
thanks fo
Regards,
Peter Teoh
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