From: Theodore Tso <tytso@mit.edu>
To: Willy Tarreau <w@1wt.eu>
Cc: Joe Barr <joe@pjprimer.com>,
Linux Kernel mailing List <linux-kernel@vger.kernel.org>
Subject: Re: Serial port blues
Date: Sun, 21 Jan 2007 13:55:35 -0500 [thread overview]
Message-ID: <20070121185534.GE27422@thunk.org> (raw)
In-Reply-To: <20070121070557.GB31780@1wt.eu>
On Sun, Jan 21, 2007 at 08:05:57AM +0100, Willy Tarreau wrote:
> Hmmm the busy loop is dirty as hell, even on SMP, but it works ;-)
> I remember is was possible to reprogram the RTC to interrupt at 8192 Hz.
> If the task is running with real time prio, it should get this accuracy,
> or am I mistaken ?
You can do in a kernel module. The problem with a userspace program
is that without the -rt patches, you can't guarantee that userspace
process will get a chance to run in time.
- Ted
next prev parent reply other threads:[~2007-01-21 19:00 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-01-19 21:37 Serial port blues Joe Barr
2007-01-20 17:36 ` Willy Tarreau
2007-01-21 5:54 ` Theodore Tso
2007-01-21 7:05 ` Willy Tarreau
2007-01-21 14:04 ` Johannes Stezenbach
[not found] ` <2f4958ff0701210650w4fa0138di6a5026de8a0823dc@mail.gmail.com>
2007-01-21 14:58 ` Willy Tarreau
[not found] ` <2f4958ff0701210710r743c1821n9af23a050c847a7@mail.gmail.com>
2007-01-21 18:52 ` Theodore Tso
[not found] ` <2f4958ff0701211105p4f7e3e86x8aaf14566112bc51@mail.gmail.com>
2007-01-21 19:30 ` Theodore Tso
2007-01-21 18:55 ` Theodore Tso [this message]
2007-01-21 5:09 ` Stuart MacDonald
2007-01-21 7:07 ` H. Peter Anvin
2007-01-21 7:08 ` H. Peter Anvin
2007-01-21 20:44 ` H. Peter Anvin
2007-01-22 11:37 ` Alan
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