From: "David S. Miller" <davem@redhat.com>
To: ak@suse.de
Cc: johnstul@us.ibm.com, jamesclv@us.ibm.com,
alan@lxorguk.ukuu.org.uk, linux-kernel@vger.kernel.org,
anton.wilson@camotion.com
Subject: Re: do_gettimeofday vs. rdtsc in the scheduler
Date: Tue, 17 Sep 2002 16:51:31 -0700 (PDT) [thread overview]
Message-ID: <20020917.165131.81918297.davem@redhat.com> (raw)
In-Reply-To: <20020918015838.A6684@wotan.suse.de>
From: Andi Kleen <ak@suse.de>
Date: Wed, 18 Sep 2002 01:58:38 +0200
The local APIC timer is specified in the Intel Manual volume 3 for example.
It's an optional feature (CPUID), but pretty much everyone has it.
It is internal or external to the processor? Ie. can it be in the
southbridge or something? If yes, then I still hold my point.
You shouldn't have to PIO to get a reliable timer value.
next prev parent reply other threads:[~2002-09-17 23:55 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <200209172020.g8HKKPF13227@eng2.beaverton.ibm.com.suse.lists.linux.kernel>
[not found] ` <1032294559.22815.180.camel@cog.suse.lists.linux.kernel>
[not found] ` <20020917.133933.69057655.davem@redhat.com.suse.lists.linux.kernel>
2002-09-17 21:00 ` do_gettimeofday vs. rdtsc in the scheduler Andi Kleen
2002-09-17 20:54 ` David S. Miller
2002-09-17 21:28 ` Alan Cox
2002-09-17 21:18 ` David S. Miller
2002-09-17 22:02 ` James Cleverdon
2002-09-17 22:44 ` Andi Kleen
2002-09-17 22:38 ` David S. Miller
2002-09-17 22:55 ` James Cleverdon
2002-09-17 23:12 ` David S. Miller
2002-09-17 23:32 ` john stultz
2002-09-17 23:32 ` David S. Miller
2002-09-17 23:52 ` Andi Kleen
2002-09-17 23:46 ` David S. Miller
2002-09-17 23:58 ` Andi Kleen
2002-09-17 23:51 ` David S. Miller [this message]
2002-09-18 0:05 ` Andi Kleen
2002-09-18 1:04 ` James Cleverdon
2002-09-19 18:02 ` Andrea Arcangeli
2002-09-20 11:04 ` Maciej W. Rozycki
2002-09-19 11:20 ` Mikael Pettersson
2002-09-19 13:27 ` Alan Cox
2002-09-19 13:39 ` Mikael Pettersson
2002-09-20 15:26 ` John Levon
2002-09-18 6:40 ` Vojtech Pavlik
2002-09-19 18:04 ` Andrea Arcangeli
[not found] <200209172020.g8HKKPF13227@eng2.beaverton.ibm.com>
2002-09-17 20:29 ` Fwd: " john stultz
2002-09-17 20:39 ` David S. Miller
2002-09-17 20:57 ` john stultz
2002-09-17 20:56 ` David S. Miller
2002-09-09 22:21 anton wilson
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