[Xenomai] Fwd: Periodic high latency

Matthew Fornero mfornero.lists at gmail.com
Fri Jun 20 22:21:28 CEST 2014


On Thu, Jun 19, 2014 at 8:48 AM, thierry mallard
<thierry.mallard at geensyde.fr> wrote:
>
> Hi,
>
> I have installed xenomai 2.6.3 with a kernel 2.6.38.8 on my dell laptop
> using adeos-ipipe-2.6.38.8-x86-2.11-03.patch.
> CPU is i5-3230M.
>
>
> When running xeno latency, I get the following results.
> What can be the cause of the high latencies that I get periodically?

You may want to check whether C1E is enabled, it can cause latency
spikes with newer Intel processors. You can disable it by writing to
the MSR_POWER_CTL register (google for this).

Best Regards,

Matt




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