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From: Con Kolivas <kernel@kolivas.org>
To: Andreas Mohr <andi@rhlx01.fht-esslingen.de>
Cc: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>,
	bert hubert <bert.hubert@netherlabs.nl>,
	linux-kernel@vger.kernel.org, george@mvista.com
Subject: Re: gettimeofday order of magnitude slower with pmtimer, which is default
Date: Tue, 21 Mar 2006 22:58:45 +1100	[thread overview]
Message-ID: <200603212258.46265.kernel@kolivas.org> (raw)
In-Reply-To: <20060321085352.GA17642@rhlx01.fht-esslingen.de>

On Tuesday 21 March 2006 19:53, Andreas Mohr wrote:
> (and the fact that invoking a function pointer should be similarly
> expensive to a conditional) I don't think it's useful.

Is 

*blah();

as expensive as

if (conditional)
	blah();

I don't know the answer. I just know cmp is expensive. Comments?

Cheers,
Con

  parent reply	other threads:[~2006-03-21 11:59 UTC|newest]

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2006-03-20 12:24 gettimeofday order of magnitude slower with pmtimer, which is default bert hubert
2006-03-20 14:50 ` Andreas Mohr
2006-03-20 15:24   ` Con Kolivas
2006-03-21  1:26     ` OGAWA Hirofumi
2006-03-21  0:40       ` kernel
2006-03-21  2:59         ` OGAWA Hirofumi
2006-03-21  3:09           ` Con Kolivas
2006-03-21  8:53             ` Andreas Mohr
2006-03-21  9:06               ` Arjan van de Ven
2006-03-21 11:58               ` Con Kolivas [this message]
2006-03-21 12:04                 ` Arjan van de Ven
2006-03-21 12:07                   ` Con Kolivas
2006-03-21 19:23       ` john stultz
2006-03-21 21:19         ` OGAWA Hirofumi
2006-03-22  0:21           ` Con Kolivas
2006-03-22 18:49             ` [PATCH] PM-Timer: doesn't use workaround if chipset is not buggy OGAWA Hirofumi
2006-03-22 21:46               ` Andrew Morton
2006-03-23  7:31                 ` OGAWA Hirofumi
2006-03-23  7:49                   ` Andrew Morton
2006-03-23 17:04               ` Andreas Mohr
2006-03-23 18:21                 ` OGAWA Hirofumi
2006-03-30 11:53                   ` Andreas Mohr
2006-03-30 15:37                     ` OGAWA Hirofumi
2006-03-30 16:02                       ` Andreas Mohr
2006-03-25 12:00               ` bert hubert
2006-03-22 19:12           ` gettimeofday order of magnitude slower with pmtimer, which is default Avi Kivity
2006-03-22 19:54             ` OGAWA Hirofumi
2006-03-22 20:05             ` john stultz
2006-03-21 19:34 ` john stultz
  -- strict thread matches above, loose matches on Subject: below --
2006-03-21  5:33 Albert Cahalan

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