[Xenomai] core I5 latency+USB

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* [Xenomai] core I5 latency+USB
@ 2014-07-07 16:14 Stéphane ANCELOT
  2014-07-07 16:24 ` Gilles Chanteperdrix
  0 siblings, 1 reply; 2+ messages in thread
From: Stéphane ANCELOT @ 2014-07-07 16:14 UTC (permalink / raw)
  To: xenomai@xenomai.org

Hi,

I have got high latencies up to 25us using my usb keyboard,
which setting in kernel 3.10 should I set ?

Regards,
Steph




^ permalink raw reply	[flat|nested] 2+ messages in thread

* Re: [Xenomai] core I5 latency+USB
  2014-07-07 16:14 [Xenomai] core I5 latency+USB Stéphane ANCELOT
@ 2014-07-07 16:24 ` Gilles Chanteperdrix
  0 siblings, 0 replies; 2+ messages in thread
From: Gilles Chanteperdrix @ 2014-07-07 16:24 UTC (permalink / raw)
  To: Stéphane ANCELOT, xenomai@xenomai.org

On 07/07/2014 06:14 PM, Stéphane ANCELOT wrote:
> Hi,
> 
> I have got high latencies up to 25us using my usb keyboard,
> which setting in kernel 3.10 should I set ?

Follow the troubleshooting guide:

http://www.xenomai.org/documentation/xenomai-2.6/html/TROUBLESHOOTING/#_the_latency_test_shows_high_latencies

That said, 25us may not be such a high latency. You may also
want to try xenomai 2.6 git, which has a workaround for some
core i* automatic switch to C1E state when idle.

-- 
                                                                Gilles.


^ permalink raw reply	[flat|nested] 2+ messages in thread

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2014-07-07 16:14 [Xenomai] core I5 latency+USB Stéphane ANCELOT
2014-07-07 16:24 ` Gilles Chanteperdrix

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