From: Karim Yaghmour <karym@opersys.com>
To: Gabriel Paubert <paubert@iram.es>
Cc: Samuel Rydh <samuel@ibrium.se>,
linuxppc-dev@lists.linuxppc.org,
Benjamin Herrenschmidt <benh@kernel.crashing.org>
Subject: Re: [PATCH] gettimeofday stability
Date: Sat, 14 Apr 2001 02:49:39 -0400 [thread overview]
Message-ID: <3AD7F303.FAD9EA51@opersys.com> (raw)
In-Reply-To: Pine.HPX.4.10.10104121947440.1891-100000@gra-ux1.iram.es
Gabriel Paubert wrote:
>
> Given that time handling is completely different in 2.2 and 2.4, it is
> surprising. This would indicate that a decrementer interrupt has happened
> too early.
>
> How often does it happen ? Does it still happen with recent kernels ?
> Were you running something that touches the decrementer (MOL, RTLINUX) ?
>
I can't tell you if the interrupt is happening too early or not,
although code could be added to check this.
I can tell you that this has been noticed by more than one person.
I noticed this and so did the person at MontaVista that contributed
the cross-platform reading code (to enable traces to be read accross
different endian machines).
If you really want to see what I mean I could forward you a textual
trace sample to proove my point.
The latest kernel I've tested this on is 2.4.0-test10.
===================================================
Karim Yaghmour
karym@opersys.com
Embedded and Real-Time Linux Expert
===================================================
** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/
next prev parent reply other threads:[~2001-04-14 6:49 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-04-11 19:00 [PATCH] gettimeofday stability Samuel Rydh
2001-04-11 19:42 ` Gabriel Paubert
2001-04-11 20:09 ` Karim Yaghmour
2001-04-11 21:31 ` Benjamin Herrenschmidt
2001-04-12 18:09 ` Gabriel Paubert
2001-04-14 6:49 ` Karim Yaghmour [this message]
2001-04-16 11:56 ` Gabriel Paubert
2001-04-16 13:25 ` Benjamin Herrenschmidt
2001-04-16 12:53 ` Gabriel Paubert
2001-04-17 11:22 ` Gabriel Paubert
2001-04-11 23:07 ` Samuel Rydh
2001-04-16 11:25 ` Gabriel Paubert
2001-04-19 20:43 ` Samuel Rydh
2001-04-21 15:21 ` Gabriel Paubert
2001-04-21 18:16 ` Samuel Rydh
2001-04-21 19:37 ` Gabriel Paubert
-- strict thread matches above, loose matches on Subject: below --
2001-04-16 16:00 Iain Sandoe
2001-04-16 22:19 ` Dan Malek
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