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Date: Sun, 29 Dec 2002 03:05:10 +0100
From: Christian Leber <christian@leber.de>
To: linux-kernel@vger.kernel.org
Subject: Re: Intel P6 vs P7 system call performance
Message-ID: <20021229020510.GA22540@core.home>
References: <200212090830.gB98USW05593@flux.loup.net> <at2l1t$g5n$1@penguin.transmeta.com> <20021209193649.GC10316@suse.de> <at2rv7$fkr$1@cesium.transmeta.com> <20021228203706.GD1258@niksula.cs.hut.fi>
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On Sat, Dec 28, 2002 at 10:37:06PM +0200, Ville Herva wrote:

> Now that Linus has killed the dragon and everybody seems happy with the
> shiny new SYSENTER code, let just add one more stupid question to this
> thread: has anyone made benchmarks on SYSCALL/SYSENTER/INT80 on Athlon? Is
> SYSCALL worth doing separately for Athlon (and perhaps Hammer/32-bit mode)?

Yes, the output of the programm Linus posted is on a Duron 750 with
2.5.53 like this:

igor3:~# ./a.out
187.894946 cycles  (call 0xffffe000)
299.155075 cycles  (int 80)

(cycles per getpid() call)


Christian Leber

-- 
  "Omnis enim res, quae dando non deficit, dum habetur et non datur,
   nondum habetur, quomodo habenda est."       (Aurelius Augustinus)
  Translation: <http://gnuhh.org/work/fsf-europe/augustinus.html>
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