From: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
To: Antonio Del Cinque <adelcinque@domain.hid>
Cc: xenomai@xenomai.org
Subject: Re: [Xenomai-help] Interrupt latency questions
Date: Tue, 23 Sep 2008 10:25:16 +0200 [thread overview]
Message-ID: <48D8A7EC.7000502@domain.hid> (raw)
In-Reply-To: <1743f3b40809230122u177e9aaeyb0cbc53f81793929@domain.hid>
Antonio Del Cinque wrote:
> Thank you,
> I think your considerations are the right ones.
>
> The DMA controller is not generating any interrupt, so I assume it is not
> actually working. I'm trying to verify that the jitter is caused by
> cache/TLB misses. I don't have much reference on how to lock the cache, so
> I'll just try to have the cache dirty in any other way to see if it causes
> the same jitter.
A good way to do this is to use the cache calibrator:
http://homepages.cwi.nl/~manegold/Calibrator/
--
Gilles.
next prev parent reply other threads:[~2008-09-23 8:25 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-09-22 9:15 [Xenomai-help] Interrupt latency questions Fillod Stephane
2008-09-23 8:22 ` Antonio Del Cinque
2008-09-23 8:25 ` Gilles Chanteperdrix [this message]
2008-10-06 14:44 ` Antonio Del Cinque
2008-10-06 14:48 ` Gilles Chanteperdrix
2008-10-07 12:02 ` Wolfgang Grandegger
-- strict thread matches above, loose matches on Subject: below --
2008-09-19 15:06 Antonio Del Cinque
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