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From: Christophe Blaess <mailist@logilin.fr>
To: xenomai@xenomai.org
Subject: Re: [Xenomai] question: XENO_OPT_TIMING_SCHEDLAT
Date: Sat, 30 Jun 2012 18:52:01 +0200	[thread overview]
Message-ID: <4FEF2EB1.3050600@logilin.fr> (raw)
In-Reply-To: <4FEED882.9070307@xenomai.org>

On 30/06/2012 12:44, Gilles Chanteperdrix wrote:
>
>> /proc/xenomai/latency is an estimation of the minimum scheduling latency
>> on your system. In order to know what to put there you should do:
>>
>> echo 0 > /proc/xenomai/latency
>>
>> Run latency under load for several hour

Is it necessary to run the test under heavy load?
We're looking for the minimal latency, not the worst.

I thought that in this case a normal, even light load would be sufficient.

>>
>> echo minimum_latency > /proc/xenomai/latency
>>
>> The value put there is then subtracted to timers deadline, so that
>> timers wake up a little bit early to compensate for the time it takes to
>> return to user-space.
>>




  reply	other threads:[~2012-06-30 16:52 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-06-30 10:39 [Xenomai] question: XENO_OPT_TIMING_SCHEDLAT ali hagigat
2012-06-30 10:44 ` Gilles Chanteperdrix
2012-06-30 16:52   ` Christophe Blaess [this message]
2012-06-30 17:04     ` Gilles Chanteperdrix
2012-07-01 19:00       ` Christophe Blaess
2012-07-01 19:09         ` Gilles Chanteperdrix
2012-07-01 19:33         ` Gilles Chanteperdrix
2012-07-02  6:12           ` Christophe Blaess
2012-07-02  7:11             ` Christophe Blaess
2012-07-02  8:47               ` Gilles Chanteperdrix

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