From: Matthew Wilcox <willy@debian.org>
To: Joel Soete <jsoe0708@tiscali.be>
Cc: parisc-linux@lists.parisc-linux.org, Matthew Wilcox <willy@debian.org>
Subject: Re: [parisc-linux] itlb miss handler optimizations!
Date: Tue, 19 Aug 2003 14:42:06 +0100 [thread overview]
Message-ID: <20030819134206.GD19630@parcelfarce.linux.theplanet.co.uk> (raw)
In-Reply-To: <3F2E54A800001F32@ocpmta8.freegates.net>
On Tue, Aug 19, 2003 at 02:33:04PM +0200, Joel Soete wrote:
> >On Thu, Aug 14, 2003 at 08:02:04AM +0200, Joel Soete wrote:
> >> btw is it for that reason (interlock) that in your patch we can read:
> >> [...]
> >> cmpb,= %r0,t0,itlb_miss_...
> >> nop
> >> [...]
> >> I am alway asking why the 'nop'.
> >
> >To fill the delayed branch slot (a silly idea, but ...)
>
> Would it be the same 'by setting the "nullify" bit' (ie cmpb,=,n ...)
Only if you know which direction the branch is going. See the cmpb
description.
--
"It's not Hollywood. War is real, war is primarily not about defeat or
victory, it is about death. I've seen thousands and thousands of dead bodies.
Do you think I want to have an academic debate on this subject?" -- Robert Fisk
next prev parent reply other threads:[~2003-08-19 13:42 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-08-19 12:33 [parisc-linux] itlb miss handler optimizations! Joel Soete
2003-08-19 13:42 ` Matthew Wilcox [this message]
-- strict thread matches above, loose matches on Subject: below --
2003-07-25 7:04 Carlos O'Donell
2003-07-25 11:46 ` Matthew Wilcox
2003-07-26 18:02 ` Carlos O'Donell
2003-08-12 3:58 ` Carlos O'Donell
2003-08-12 12:21 ` Joel Soete
2003-08-12 14:40 ` Carlos O'Donell
2003-08-12 16:06 ` Grant Grundler
2003-08-12 16:32 ` Matthew Wilcox
2003-08-12 17:06 ` Joel Soete
2003-08-13 15:57 ` Grant Grundler
2003-08-13 16:38 ` Joel Soete
2003-08-13 14:52 ` Joel Soete
2003-08-13 15:56 ` Carlos O'Donell
2003-08-13 16:05 ` Carlos O'Donell
2003-08-13 16:43 ` Joel Soete
2003-08-13 16:51 ` Grant Grundler
2003-08-14 6:02 ` Joel Soete
2003-08-14 11:46 ` Matthew Wilcox
2003-08-14 13:56 ` Joel Soete
2003-08-14 15:23 ` Grant Grundler
2003-08-14 16:15 ` Joel Soete
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