From: Andrew Morton <akpm@osdl.org>
To: Ingo Molnar <mingo@elte.hu>
Cc: kernel@kolivas.org, linux-kernel@vger.kernel.org, josh@stack.nl
Subject: Re: [PATCH] 2.6.1 Hyperthread smart "nice" 2
Date: Tue, 3 Feb 2004 14:59:29 -0800 [thread overview]
Message-ID: <20040203145929.01a96d9b.akpm@osdl.org> (raw)
In-Reply-To: <20040203105758.GA7783@elte.hu>
Ingo Molnar <mingo@elte.hu> wrote:
>
> * Con Kolivas <kernel@kolivas.org> wrote:
>
> > At least it appears Intel are well aware of the priority problem, but
> > full priority support across logical cores is not likely. However I
> > guess these new instructions are probably enough to work with if
> > someone can do the coding.
>
> these instructions can be used in the idle=poll code instead of rep-nop.
> This way idle-wakeup can be done via the memory bus in essence, and the
> idle threads wont waste CPU time. (right now idle=poll wastes lots of
> cycles on HT boxes and is thus unusable.)
The code to do this was merged quite a while ago. See
arch/i386/kernel/process.c:mwait_idle().
I was hoping to see a spinlock patch using mwait(), but nothing yet..
prev parent reply other threads:[~2004-02-03 22:58 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-01-29 8:17 [PATCH] 2.6.1 Hyperthread smart "nice" Con Kolivas
2004-01-29 9:39 ` Jos Hulzink
2004-01-29 10:28 ` Con Kolivas
2004-01-29 10:36 ` Con Kolivas
2004-02-02 9:27 ` [PATCH] 2.6.1 Hyperthread smart "nice" 2 Con Kolivas
2004-02-02 10:31 ` Ingo Molnar
2004-02-03 10:52 ` Con Kolivas
2004-02-03 10:58 ` Ingo Molnar
2004-02-03 11:07 ` Con Kolivas
2004-02-03 11:12 ` Ingo Molnar
2004-02-03 11:14 ` Con Kolivas
2004-02-03 11:47 ` Ingo Molnar
2004-02-03 11:19 ` Nick Piggin
2004-02-03 22:59 ` Andrew Morton [this message]
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