From: "Ulrich Windl" <Ulrich.Windl@rz.uni-regensburg.de>
To: linux-kernel@vger.kernel.org
Subject: Re: announce: PPSkit patch for Linux 2.4.2 (pre6)
Date: Tue, 10 Apr 2001 09:12:57 +0200 [thread overview]
Message-ID: <3AD2CE98.28151.46E93A@localhost> (raw)
In-Reply-To: <Pine.LNX.4.21.0104091815160.1367-300000@terran.bussi.de>
In-Reply-To: <3AC83FF1.27420.398B86@localhost>
Hi, Cycle Counters,
Linux currently tries to synchronize TSCs for consistent time in SMP
systems. One would not believe what combinations of hardware are tried,
especially for precision timing. Here's a short answer to my asking-
back about a complaint (the kernel is reporting negative time warps).
As any problem, it can be solved with some overhead, but should it be
done?
Replies to me too, as I'm not subscribed, please.
Ulrich
On 9 Apr 2001, at 18:39, Andreas Bussjaeger wrote:
> > from the current CPU. All these values seem highly suspect. However a
> > few more values would be helpful to diagnose the situation.
>
> I have to tell you that I have one 533 MHz Celeron and one 433 MHz
> Celeron.
>
> > indicate that the CPUs are 968ms apart (each CPU half from the average).
next parent reply other threads:[~2001-04-10 7:13 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <Pine.LNX.4.21.0104091815160.1367-300000@terran.bussi.de>
[not found] ` <3AC83FF1.27420.398B86@localhost>
2001-04-10 7:12 ` Ulrich Windl [this message]
2001-04-11 17:56 ` announce: PPSkit patch for Linux 2.4.2 (pre6) H. Peter Anvin
2001-04-11 18:03 ` Alan Cox
2001-04-11 18:18 ` H. Peter Anvin
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=3AD2CE98.28151.46E93A@localhost \
--to=ulrich.windl@rz.uni-regensburg.de \
--cc=linux-kernel@vger.kernel.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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox