From: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
To: "Jens Köhler" <jenskxxx@googlemail.com>
Cc: Xenomai <xenomai@xenomai.org>
Subject: Re: [Xenomai] Xenomai and normal linux application - Wait time with select() not reliable
Date: Mon, 21 Jan 2013 19:48:55 +0100 [thread overview]
Message-ID: <50FD8D97.20706@xenomai.org> (raw)
In-Reply-To: <CAL7_A_Wkjj1mTeDcEfDzPKFkQhiYeChPgC=ggVkedxqy=yaLng@mail.gmail.com>
On 01/21/2013 03:42 PM, Jens Köhler wrote:
> Hi Gilles,
>
>> Using a Linux semaphore causes a switch to secondary mode, which means
>> potentially unbounded latencies.
>
> Yes, I have no problem with the secondary mode. I have only the
> problem that linux kernel not restarts sleeping task as fast as
> expected. Instead 3 ms -> 50 ms. And it happens only when a linux
> semaphore is in use. Do you have an idea why this happens and how to
> find reason?
If this issue is not due to xenomai, then the xenomai mailing list may
not be the best place to ask.
>
>
>
>> Please keep the list in CC.
> What means CC ?
Carbon Copy
--
Gilles.
next prev parent reply other threads:[~2013-01-21 18:48 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-07-03 13:30 [Xenomai] Xenomai and normal linux application - Wait time with select() not reliable Jens Köhler
2012-07-03 21:53 ` Gilles Chanteperdrix
2012-07-04 8:36 ` Jens Köhler
2012-07-04 8:45 ` Gilles Chanteperdrix
2012-07-04 10:06 ` Philippe Gerum
2012-07-04 11:45 ` Jens Köhler
2012-07-04 12:04 ` Gilles Chanteperdrix
[not found] ` <CAL7_A_VQe-KGBoYq034hT=6CdJJPpwEQTs1EgDQ=325WjOfUzw@mail.gmail.com>
2012-07-04 12:57 ` Gilles Chanteperdrix
2012-07-04 13:10 ` Jens Köhler
2012-07-04 13:17 ` Jens Köhler
2012-07-04 13:22 ` Gilles Chanteperdrix
[not found] ` <CAL7_A_WTJUeWNTTra2t9veiyWMxC5VtpotocMHGPdU1v7QAxKA@mail.gmail.com>
[not found] ` <4FF44C52.6050809@xenomai.org>
[not found] ` <CAL7_A_VUC8JD9yeMnLt2iJQ0ex_at3QMhiL3cQ5CHPFh0rcJRA@mail.gmail.com>
[not found] ` <4FF585C4.1000708@xenomai.org>
2012-11-19 13:29 ` Jens Köhler
2012-11-19 13:42 ` Gilles Chanteperdrix
2012-12-03 7:59 ` Jens Köhler
2012-12-03 9:26 ` Gilles Chanteperdrix
2012-12-04 10:09 ` Jens Köhler
[not found] ` <CAL7_A_XHtj19V3gnog7_Hoer6UGxRJfoFwT0sgzQvhtARB3b9A@mail.gmail.com>
2013-01-21 12:09 ` Gilles Chanteperdrix
[not found] ` <CAL7_A_Wkjj1mTeDcEfDzPKFkQhiYeChPgC=ggVkedxqy=yaLng@mail.gmail.com>
2013-01-21 18:48 ` Gilles Chanteperdrix [this message]
2012-07-04 13:33 ` Philippe Gerum
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