From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Chris Friesen <cfriesen@nortelnetworks.com>
Cc: linuxppc-dev@ozlabs.org
Subject: Re: tbr/decrementer and SMP -- do the cpus stay in sync?
Date: Tue, 19 Oct 2004 09:46:54 +1000 [thread overview]
Message-ID: <1098143214.30522.40.camel@gaston> (raw)
In-Reply-To: <41742E62.6060603@nortelnetworks.com>
On Tue, 2004-10-19 at 06:58, Chris Friesen wrote:
> I thought I remembered some discussion on this a while back, but I can't find it
> in my archived messages or online, so here goes.
>
> With SMP PowerPC machines (specifically the dual G5) we sync up the timebase
> when we bring up the second CPU. Are we guaranteed that they stay in sync after
> that point, or will they drift? If they drift, do we have any idea how much?
Yes. They have the same clock source. They won't drift.
Ben.
prev parent reply other threads:[~2004-10-18 23:51 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-10-18 20:58 tbr/decrementer and SMP -- do the cpus stay in sync? Chris Friesen
2004-10-18 23:46 ` Benjamin Herrenschmidt [this message]
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=1098143214.30522.40.camel@gaston \
--to=benh@kernel.crashing.org \
--cc=cfriesen@nortelnetworks.com \
--cc=linuxppc-dev@ozlabs.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;
as well as URLs for NNTP newsgroup(s).