linux-kernel - Re: pthread_create() slow for many threads; also time to revisit 64b context switch optimization?

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Message-ID: <48A2EE07.3040003@redhat.com>
Date:	Wed, 13 Aug 2008 07:21:59 -0700
From:	Ulrich Drepper <drepper@...hat.com>
To:	Arjan van de Ven <arjan@...radead.org>
CC:	Ingo Molnar <mingo@...e.hu>, akpm@...ux-foundation.org,
	hugh@...itas.com, linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	briangrant@...gle.com, cgd@...gle.com, mbligh@...gle.com,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>
Subject: Re: pthread_create() slow for many threads; also time to revisit
 64b context switch optimization?

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Arjan van de Ven wrote:
>> i'd go for 1) or 2).
> 
> I would go for 1) clearly; it's the cleanest thing going forward for
> sure.

I want to see numbers first.  If there are problems visible I definitely
would want to see 2.  Andi at the time I wrote that code was very
adamant that I use the flag.

- --
➧ Ulrich Drepper ➧ Red Hat, Inc. ➧ 444 Castro St ➧ Mountain View, CA ❖
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