From: Stephen Rothwell <sfr@canb.auug.org.au>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Roman Zippel <zippel@linux-m68k.org>, Ingo Molnar <mingo@elte.hu>,
linux-kernel@vger.kernel.org, John Stultz <johnstul@us.ibm.com>,
Thomas Gleixner <tglx@linutronix.de>
Subject: Re: [patch, v2.6.22-rc6] sys_time() speedup
Date: Tue, 26 Jun 2007 12:20:06 +1000 [thread overview]
Message-ID: <20070626122006.c94cb2c4.sfr@canb.auug.org.au> (raw)
In-Reply-To: <20070625151508.86fa3778.akpm@linux-foundation.org>
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On Mon, 25 Jun 2007 15:15:08 -0700 Andrew Morton <akpm@linux-foundation.org> wrote:
>
> On Mon, 25 Jun 2007 23:09:46 +0200
> Roman Zippel <zippel@linux-m68k.org> wrote:
>
> > On Monday 25 June 2007, Ingo Molnar wrote:
> >
> > > the patch improves the sysbench OLTP macrobenchmark significantly:
> >
> > Has that any real practical relevance?
>
> Interesting question. The patch adds a new test-n-branch to gettimeofday()
> so if gettimeofday() is used much more frequently than time(), we lose.
Isn't gettimeofday() called *lots* by the X server and programs - one of
the reasons we bother putting it in the VDSO.
--
Cheers,
Stephen Rothwell sfr@canb.auug.org.au
http://www.canb.auug.org.au/~sfr/
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next prev parent reply other threads:[~2007-06-26 2:20 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-06-25 20:06 Ingo Molnar
2007-06-25 21:09 ` Roman Zippel
2007-06-25 21:17 ` Jesper Juhl
2007-06-25 22:00 ` Roman Zippel
2007-06-25 22:20 ` Jesper Juhl
2007-06-25 22:49 ` Roman Zippel
2007-06-26 16:18 ` Ingo Molnar
2007-06-26 16:39 ` Roman Zippel
2007-06-26 16:49 ` Andrea Arcangeli
2007-06-26 17:13 ` Ray Lee
2007-06-27 0:15 ` Andrea Arcangeli
2007-06-26 17:08 ` Roman Zippel
2007-06-26 17:35 ` Andrew Morton
2007-06-25 22:15 ` Andrew Morton
2007-06-26 2:20 ` Stephen Rothwell [this message]
2007-06-26 15:26 ` Ingo Molnar
2007-06-26 17:14 ` Andrew Morton
2007-06-27 0:22 ` Andrea Arcangeli
2007-06-26 15:43 ` Andrea Arcangeli
2007-06-26 17:36 ` Andrew Morton
2007-06-25 22:02 ` Eric Dumazet
2007-06-26 0:22 ` Mark Lord
2007-06-26 14:58 ` Ingo Molnar
2007-06-26 16:59 ` john stultz
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