All of lore.kernel.org
 help / color / mirror / Atom feed
From: Jan Kiszka <kiszka@domain.hid>
To: "Ignacio García Pérez" <iggarpe@domain.hid>
Cc: xenomai@xenomai.org
Subject: Re: [Xenomai-help] timeout in native API calls          (cond, sem, mutex, etc).
Date: Fri, 21 Oct 2005 14:16:37 +0200	[thread overview]
Message-ID: <4358DC25.9010307@domain.hid> (raw)
In-Reply-To: <4358C885.8010808@domain.hid>

[-- Attachment #1: Type: text/plain, Size: 734 bytes --]

Ignacio García Pérez wrote:
> In my previous (long) message I forgot something. I think that without
> support for abolute timeouts in the nucleus, the RTAI skin cannot be
> accurately implemented (*_until and *_timed calls).
> 

Then something must be wrong, e.g. here: ;)

http://www.rts.uni-hannover.de/xenomai/lxr/source/skins/rtdm/drvlib.c?v=SVN#L280
(other skins do it similar but have to deal with more complexity)

I does work as you can see, it just takes some locking. :)

Well, it's not that accurate as it could be at best, that's true, but
the short time you "loose" between the conversions in the skin and the
nucleus is not significant compared to the overall jitter you always
face on an OS.

Jan


[-- Attachment #2: OpenPGP digital signature --]
[-- Type: application/pgp-signature, Size: 254 bytes --]

  reply	other threads:[~2005-10-21 12:16 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2005-10-20 16:20 [Xenomai-help] timeout in native API calls (cond, sem, mutex, etc) Ignacio García Pérez
2005-10-20 16:46 ` Jan Kiszka
2005-10-20 17:09   ` Ignacio García Pérez
2005-10-20 17:33     ` Jan Kiszka
2005-10-20 18:18       ` Philippe Gerum
2005-10-20 18:16     ` Philippe Gerum
2005-10-21  7:20       ` Ignacio García Pérez
2005-10-21 10:29         ` Philippe Gerum
2005-10-21 12:02           ` Ignacio García Pérez
2005-10-21 10:51         ` Ignacio García Pérez
2005-10-21 12:23           ` Jan Kiszka
2005-10-21 14:46             ` Ignacio García Pérez
2005-10-21 16:45             ` Philippe Gerum
2005-10-21 16:39           ` Philippe Gerum
2005-10-21 18:55             ` Ignacio García Pérez
2005-10-21 10:52         ` Ignacio García Pérez
2005-10-21 12:16           ` Jan Kiszka [this message]
2005-10-21 14:40             ` Ignacio García Pérez
2005-10-21 16:42           ` Philippe Gerum

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=4358DC25.9010307@domain.hid \
    --to=kiszka@domain.hid \
    --cc=iggarpe@domain.hid \
    --cc=xenomai@xenomai.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.