From: Andi Kleen <ak@suse.de>
To: Nick Piggin <nickpiggin@yahoo.com.au>
Cc: linux-kernel@vger.kernel.org
Subject: Re: [patch 1/14] mm: opt rmqueue
Date: Mon, 7 Nov 2005 04:23:44 +0100 [thread overview]
Message-ID: <200511070423.45306.ak@suse.de> (raw)
In-Reply-To: <436EA88C.3050104@yahoo.com.au>
On Monday 07 November 2005 02:06, Nick Piggin wrote:
> Yes, all this turning on and off of interrupts does have a
> significant cost here.
How did you find out?
>
> With the full patchset applied, most of the hot path statistics
> get put under areas that already require interrupts to be off,
> however there are still a few I didn't get around to doing.
> zone_statistics on CONFIG_NUMA, for example.
These should just be local_t
>
> I wonder if local_t is still good on architectures like ppc64
> where it still requires an ll/sc sequence?
The current default fallback local_t doesn't require that. It uses
different fields indexed by !!in_interrupt()
-Andi
next prev parent reply other threads:[~2005-11-07 3:23 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-11-06 8:11 [rfc][patch 0/14] mm: performance improvements Nick Piggin
2005-11-06 8:20 ` [patch 1/14] mm: opt rmqueue Nick Piggin
2005-11-06 8:20 ` [patch 2/14] mm: Nick Piggin
2005-11-06 8:20 ` [patch 2/14] mm: pte prefetch Nick Piggin
2005-11-06 8:21 ` [patch 3/14] mm: release opt Nick Piggin
2005-11-06 8:22 ` [patch 4/14] mm: rmap opt Nick Piggin
2005-11-06 8:23 ` [patch 5/14] mm: set_page_refs opt Nick Piggin
2005-11-06 8:24 ` [patch 6/14] mm: microopt conditions Nick Piggin
2005-11-06 8:24 ` [patch 7/14] mm: remove bad_range Nick Piggin
2005-11-06 8:25 ` [patch 8/14] mm: remove pcp_low Nick Piggin
2005-11-06 8:25 ` [patch 9/14] mm: page_state opt Nick Piggin
2005-11-06 8:26 ` [patch 10/14] mm: single pcp list Nick Piggin
2005-11-06 8:26 ` [patch 11/14] mm: increase pcp size Nick Piggin
2005-11-06 8:27 ` [patch 12/14] mm: variable " Nick Piggin
2005-11-06 8:27 ` [patch 13/14] mm: cleanup zone_pcp Nick Piggin
2005-11-06 8:28 ` [patch 14/14] mm: page_alloc cleanups Nick Piggin
2005-11-13 2:38 ` [patch 9/14] mm: page_state opt Andi Kleen
2005-11-06 17:37 ` [patch 7/14] mm: remove bad_range Bob Picco
2005-11-07 0:58 ` Nick Piggin
2005-11-07 3:00 ` Bob Picco
2005-11-07 3:05 ` Nick Piggin
2005-11-07 1:40 ` [patch 5/14] mm: set_page_refs opt Christoph Hellwig
2005-11-07 1:45 ` Nick Piggin
2005-11-06 8:35 ` [patch 2/14] mm: pte prefetch Arjan van de Ven
2005-11-06 8:51 ` Nick Piggin
2005-11-06 17:37 ` [patch 1/14] mm: opt rmqueue Andi Kleen
2005-11-07 1:06 ` Nick Piggin
2005-11-07 3:23 ` Andi Kleen [this message]
2005-11-07 3:43 ` Nick Piggin
2005-11-07 1:39 ` [rfc][patch 0/14] mm: performance improvements Christoph Hellwig
2005-11-07 1:51 ` Nick Piggin
2005-11-07 3:57 ` Paul Jackson
2005-11-07 4:51 ` Nick Piggin
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