"Antonino A. Daplas" [off-list ref] wrote:

On Friday 15 July 2005 18:39, Andrew Morton wrote:

quoted

Begin forwarded message:

Date: Fri, 15 Jul 2005 12:14:37 +0200
From: Knut Petersen <redacted>
To: linux-kernel@vger.kernel.org
Subject: framebuffer blitting performance loss  2.6.12 -> 2.6.13-rc3


Hi everybody!

There is a serious performance loss between 2.6.12 and 2.6.13-rc3
affecting _all_ framebuffer devices, especially those with fast
bitblit functions.

I haven't seen any significant performance penalty, between 2.6.12-rc5-mm1
and 2.6.13-rc3-mm1.

Based on your results, I would pinpoint the culprit to be in
video/console/bitblit.c.  However, the changes there are minor, and should not
alter the peformance.

So.. what happened here?  Is the problem still present in 2.6.13-rc4?


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