From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Juergen Kienhoefer <juergen@kienhoefer.com>
Cc: linuxppc-dev list <linuxppc-dev@lists.linuxppc.org>
Subject: Re: cache coherence problem
Date: Tue, 18 Nov 2003 16:24:10 +1100 [thread overview]
Message-ID: <1069133049.7168.123.camel@gaston> (raw)
In-Reply-To: <1069132955.7170.120.camel@gaston>
On Tue, 2003-11-18 at 16:22, Benjamin Herrenschmidt wrote:
> On Tue, 2003-11-18 at 16:00, Juergen Kienhoefer wrote:
> > Guys,
> > Thank you very much for the ideas.
> > Basically, what I need to do is:
> > dcbst
> > sync
> > iccci
> ^^^^^^^
> No: icbi
>
> > sync
> > isync
> > for every 32 bytes of the memory block I put code in.
Actually, to be precise, you need:
1) A loop of dcbst's over every cache line crossed by your code
2) one sync
3) A loop of icbi's over every cache line crossed by your code
4) one sync, one isync
Ben.
** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/
next prev parent reply other threads:[~2003-11-18 5:24 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-11-18 1:16 cache coherence problem Juergen Kienhoefer
2003-11-18 2:36 ` Matt Porter
2003-11-18 2:38 ` Michael R. Zucca
2003-11-19 22:35 ` linas
2003-11-18 3:02 ` Benjamin Herrenschmidt
2003-11-18 5:00 ` Juergen Kienhoefer
2003-11-18 5:22 ` Benjamin Herrenschmidt
2003-11-18 5:24 ` Benjamin Herrenschmidt [this message]
2003-11-18 17:40 ` cache coherence problem: FIXED Juergen Kienhoefer
2003-11-18 8:04 ` cache coherence problem Wolfgang Denk
2003-11-18 9:37 ` Gabriel Paubert
2003-11-19 0:35 ` Benjamin Herrenschmidt
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