From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: indrek.kruusa@tuleriit.ee
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: Very high load on P4 machines with 2.4.28
Date: Wed, 05 Jan 2005 14:03:46 +0000 [thread overview]
Message-ID: <1104929106.24896.171.camel@localhost.localdomain> (raw)
In-Reply-To: <41DBCAE5.9010408@tuleriit.ee>
> Maybe I am victim of marketing (or poor memory) but wasn't it so that
> x86 instruction HLT was possible to use for single logical processor?
You can easily park one of the threads ("rep nop" is used as a hint to
give the CPU back to the other thread so
1: hlt
rep nop
jr 1b
ought to do it, but in HT mode other stuff like the cache behaviour is
often changed
next prev parent reply other threads:[~2005-01-05 15:08 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-01-05 11:09 Very high load on P4 machines with 2.4.28 Indrek Kruusa
2005-01-05 14:03 ` Alan Cox [this message]
-- strict thread matches above, loose matches on Subject: below --
2005-01-04 22:41 Nicholas Berry
2005-01-04 23:05 ` Jesper Juhl
2005-01-05 0:02 ` Alan Cox
2005-01-05 1:21 ` Con Kolivas
2005-01-05 7:12 ` Anton Blanchard
2005-01-04 19:58 Marek Habersack
2005-01-04 19:56 Marek Habersack
2005-01-04 22:03 ` Willy Tarreau
2005-01-04 23:07 ` Marek Habersack
2005-01-05 5:28 ` Willy Tarreau
2005-01-05 11:32 ` Marek Habersack
2005-01-04 22:05 ` Willy Tarreau
2005-01-04 23:09 ` Marek Habersack
2005-01-05 9:42 ` Marcelo Tosatti
2005-01-05 17:49 ` Marek Habersack
2005-01-06 18:56 ` Denis Vlasenko
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