* [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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