From: Samuel Rydh <samuel@ibrium.se>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: linuxppc-dev@lists.linuxppc.org, Paul Mackerras <paulus@samba.org>
Subject: Re: [PATCH] 2.6 timebase synchronization
Date: Sat, 9 Aug 2003 13:48:02 +0200 [thread overview]
Message-ID: <20030809114802.GA1654@ibrium.se> (raw)
In-Reply-To: <1060419490.653.18.camel@gaston>
On Sat, Aug 09, 2003 at 10:58:11AM +0200, Benjamin Herrenschmidt wrote:
> I'm on vacation now, I can't test it until I'm back, but that
> looks quite good overall (except maybe the MacOS-like constant
> naming for kXXXX :)
>
> However, does it work with more than 2 CPUs ?
Yes, it does. The code simply passes the timestamp from CPU0
to the one currently beeing booted (the CPU0 timebase is
not affected).
> It seem to be rather
> dual CPU centric from my understanding of the ack mecanism...
Only a pair of CPUs are synchronized simultaneously, yes. But there
is absolutely no need to synchronize more than two at the same.
Besides, CPU2 is not started until CPU1 has booted...
/Samuel
** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/
next prev parent reply other threads:[~2003-08-09 11:48 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-08-08 0:15 [PATCH] 2.6 timebase synchronization Samuel Rydh
2003-08-09 1:13 ` Samuel Rydh
2003-08-09 8:58 ` Benjamin Herrenschmidt
2003-08-09 11:48 ` Samuel Rydh [this message]
2003-08-10 2:09 ` Paul Mackerras
2003-08-10 9:39 ` Benjamin Herrenschmidt
2003-08-10 16:22 ` Mark Guertin
2003-08-10 21:29 ` Samuel Rydh
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