From: Holger Freyther <holger+oe@freyther.de>
To: openembedded-devel@lists.openembedded.org
Subject: Re: [PATCH/RFC] qt4-embedded: tune QT_ARCH for armv6
Date: Thu, 04 Nov 2010 19:26:56 +0100 [thread overview]
Message-ID: <4CD2FAF0.4080905@freyther.de> (raw)
In-Reply-To: <1288864342-20973-1-git-send-email-eric@eukrea.com>
On 11/04/2010 10:52 AM, Eric Bénard wrote:
> this is a RFC, I think it can also be used on qt 4.6.x and on armv7.
> Setting QT_ARCH to armv6 enable some asm optimized functions in QT.
Do you know the consequences of this change? E.g. in the painting
engine unaligned memory access will be allowed. I am not sure that Nokia has
ever benchmarked what is faster (aligned/unaligned) access. So it would be
very interesting to know the perf difference. E.g. use qttracereply to measure it.
Phil do you happen to know why unaligned access got allowed starting from
armv6? How fast will it be?
next prev parent reply other threads:[~2010-11-04 18:27 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-11-04 9:52 [PATCH/RFC] qt4-embedded: tune QT_ARCH for armv6 Eric Bénard
2010-11-04 18:05 ` Khem Raj
2010-11-04 18:26 ` Holger Freyther [this message]
2010-11-04 19:14 ` Eric Bénard
2010-11-05 9:32 ` Holger Freyther
2010-11-05 9:42 ` Eric Bénard
2010-11-05 10:21 ` Holger Freyther
2010-11-05 10:41 ` Eric Bénard
2010-11-07 19:42 ` Eric Bénard
2010-11-04 20:27 ` Khem Raj
2010-11-04 21:05 ` Koen Kooi
2010-11-05 11:21 ` Phil Blundell
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