From: Ralf Baechle <ralf@linux-mips.org>
To: "Maciej W. Rozycki" <macro@linux-mips.org>
Cc: Atsushi Nemoto <anemo@mba.ocn.ne.jp>, linux-mips@linux-mips.org
Subject: Re: [PATCH] qemu does not have dcache aliases
Date: Mon, 21 Aug 2006 16:26:57 +0100 [thread overview]
Message-ID: <20060821152657.GB19600@linux-mips.org> (raw)
In-Reply-To: <Pine.LNX.4.64N.0608211612090.17504@blysk.ds.pg.gda.pl>
On Mon, Aug 21, 2006 at 04:16:21PM +0100, Maciej W. Rozycki wrote:
> > Well, the QEMU cpu has 2-way 2kB dcache... does not have aliasing
> > anyway. :-)
>
> I don't think emulating a bigger cache so that we can add aliases should
> be *that* difficult. Adding aliases themselves might be a bit trickier,
> but the gain would certainly justify the hassle, wouldn't it?
The cache lookup for every access would have serious impact on performance.
The question is, is it worth the price? Would such patches be acceptable
by the upstream qemu maintainers?
Ralf
next prev parent reply other threads:[~2006-08-21 15:26 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-08-19 15:33 [PATCH] qemu does not have dcache aliases Atsushi Nemoto
2006-08-21 12:45 ` Maciej W. Rozycki
2006-08-21 12:47 ` Ralf Baechle
2006-08-21 13:59 ` Atsushi Nemoto
2006-08-21 14:46 ` Ralf Baechle
2006-08-21 14:51 ` Geert Uytterhoeven
2006-08-21 15:02 ` Ralf Baechle
2006-08-21 15:22 ` Atsushi Nemoto
2006-08-21 15:16 ` Maciej W. Rozycki
2006-08-21 15:26 ` Ralf Baechle [this message]
2006-08-21 15:36 ` Thiemo Seufer
2006-08-21 15:43 ` Geert Uytterhoeven
2006-08-21 18:12 ` Thiemo Seufer
2006-08-21 20:39 ` Ralf Baechle
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