From: Jamie Lokier <jamie@shareable.org>
To: Eric <eric@cisu.net>
Cc: linux-kernel@vger.kernel.org, "Stephan T. Lavavej" <stl@nuwen.net>
Subject: Re: Process Creation Speed
Date: Mon, 19 Apr 2004 10:48:33 +0100 [thread overview]
Message-ID: <20040419094833.GB13007@mail.shareable.org> (raw)
In-Reply-To: <200404190043.04358.eric@cisu.net>
Eric wrote:
> > None of this answers the question which is relevant to linux-kernel:
> > why does process creation take 7.5ms and fail to scale with CPU
> > internal clock speed over a factor of 4 (600MHz x86 to 2.2GHz x86).
>
> The reason it doesn't scale is probably because the kernel always runs at a
> specified speed, 100HZ which leaves 10ms(i believe?) timeslices. I would try
> a HZ patch and bump it up to 1000, i bet you would see a big difference then.
Hmm. The timer speed shouldn't affect the measured speed of fork() at
all. It might show up if the measuring program is dependent on the
timer in some way, though.
-- Jamie
next prev parent reply other threads:[~2004-04-19 9:49 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-04-17 2:16 Process Creation Speed Stephan T. Lavavej
2004-04-18 5:44 ` Eric
2004-04-19 0:30 ` Jamie Lokier
2004-04-19 2:15 ` Eric
2004-04-19 3:04 ` Jamie Lokier
2004-04-19 5:43 ` Eric
2004-04-19 9:48 ` Jamie Lokier [this message]
2004-04-19 12:09 ` Johannes Stezenbach
2004-04-19 12:44 ` Stephan T. Lavavej
2004-04-19 22:48 ` David Lang
2004-04-22 13:40 ` Jakob Oestergaard
2004-04-19 13:28 ` Jamie Lokier
[not found] <1MFUQ-1zo-3@gated-at.bofh.it>
[not found] ` <1MGnU-1U9-19@gated-at.bofh.it>
2004-04-19 15:43 ` Andi Kleen
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