From: Nick Piggin <nickpiggin@yahoo.com.au>
To: Pekka J Enberg <penberg@cs.helsinki.fi>
Cc: Christoph Lameter <clameter@sgi.com>,
Andrew Morton <akpm@linux-foundation.org>,
Ingo Molnar <mingo@elte.hu>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
suresh.b.siddha@intel.com, corey.d.gough@intel.com,
Matt Mackall <mpm@selenic.com>,
Denis Vlasenko <vda.linux@googlemail.com>,
Erik Andersen <andersen@codepoet.org>
Subject: Re: [patch 09/10] Remove the SLOB allocator for 2.6.23
Date: Tue, 10 Jul 2007 18:27:08 +1000 [thread overview]
Message-ID: <469342DC.8070007@yahoo.com.au> (raw)
In-Reply-To: <Pine.LNX.4.64.0707101049230.23040@sbz-30.cs.Helsinki.FI>
Pekka J Enberg wrote:
> Curious, /proc/meminfo immediately after boot shows:
>
> SLUB (debugging enabled):
>
> (none):~# cat /proc/meminfo
> MemTotal: 30260 kB
> MemFree: 22096 kB
>
> SLUB (debugging disabled):
>
> (none):~# cat /proc/meminfo
> MemTotal: 30276 kB
> MemFree: 22244 kB
>
> SLOB:
>
> (none):~# cat /proc/meminfo
> MemTotal: 30280 kB
> MemFree: 22004 kB
>
> That's 92 KB advantage for SLUB with debugging enabled and 240 KB when
> debugging is disabled.
Interesting. What kernel version are you using?
> Nick, Matt, care to retest SLUB and SLOB for your setups?
I don't think there has been a significant change in the area of
memory efficiency in either since I last tested, and Christoph and
I both produced the same result.
I can't say where SLOB is losing its memory, but there are a few
places that can still be improved, so I might get keen and take
another look at it once all the improvements to both allocators
gets upstream.
--
SUSE Labs, Novell Inc.
WARNING: multiple messages have this Message-ID (diff)
From: Nick Piggin <nickpiggin@yahoo.com.au>
To: Pekka J Enberg <penberg@cs.helsinki.fi>
Cc: Christoph Lameter <clameter@sgi.com>,
Andrew Morton <akpm@linux-foundation.org>,
Ingo Molnar <mingo@elte.hu>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
suresh.b.siddha@intel.com, corey.d.gough@intel.com,
Matt Mackall <mpm@selenic.com>,
Denis Vlasenko <vda.linux@googlemail.com>,
Erik Andersen <andersen@codepoet.org>
Subject: Re: [patch 09/10] Remove the SLOB allocator for 2.6.23
Date: Tue, 10 Jul 2007 18:27:08 +1000 [thread overview]
Message-ID: <469342DC.8070007@yahoo.com.au> (raw)
In-Reply-To: <Pine.LNX.4.64.0707101049230.23040@sbz-30.cs.Helsinki.FI>
Pekka J Enberg wrote:
> Curious, /proc/meminfo immediately after boot shows:
>
> SLUB (debugging enabled):
>
> (none):~# cat /proc/meminfo
> MemTotal: 30260 kB
> MemFree: 22096 kB
>
> SLUB (debugging disabled):
>
> (none):~# cat /proc/meminfo
> MemTotal: 30276 kB
> MemFree: 22244 kB
>
> SLOB:
>
> (none):~# cat /proc/meminfo
> MemTotal: 30280 kB
> MemFree: 22004 kB
>
> That's 92 KB advantage for SLUB with debugging enabled and 240 KB when
> debugging is disabled.
Interesting. What kernel version are you using?
> Nick, Matt, care to retest SLUB and SLOB for your setups?
I don't think there has been a significant change in the area of
memory efficiency in either since I last tested, and Christoph and
I both produced the same result.
I can't say where SLOB is losing its memory, but there are a few
places that can still be improved, so I might get keen and take
another look at it once all the improvements to both allocators
gets upstream.
--
SUSE Labs, Novell Inc.
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next prev parent reply other threads:[~2007-07-10 8:27 UTC|newest]
Thread overview: 111+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-07-08 3:49 [patch 00/10] [RFC] SLUB patches for more functionality, performance and maintenance Christoph Lameter
2007-07-08 3:49 ` [patch 01/10] SLUB: Direct pass through of page size or higher kmalloc requests Christoph Lameter
2007-07-08 3:49 ` [patch 02/10] SLUB: Avoid page struct cacheline bouncing due to remote frees to cpu slab Christoph Lameter
2007-07-08 3:49 ` [patch 03/10] SLUB: Do not use page->mapping Christoph Lameter
2007-07-08 3:49 ` [patch 04/10] SLUB: Move page->offset to kmem_cache_cpu->offset Christoph Lameter
2007-07-08 3:49 ` [patch 05/10] SLUB: Avoid touching page struct when freeing to per cpu slab Christoph Lameter
2007-07-08 3:49 ` [patch 06/10] SLUB: Place kmem_cache_cpu structures in a NUMA aware way Christoph Lameter
2007-07-08 3:49 ` [patch 07/10] SLUB: Optimize cacheline use for zeroing Christoph Lameter
2007-07-08 3:50 ` [patch 08/10] SLUB: Single atomic instruction alloc/free using cmpxchg Christoph Lameter
2007-07-08 3:50 ` [patch 09/10] Remove the SLOB allocator for 2.6.23 Christoph Lameter
2007-07-08 7:51 ` Ingo Molnar
2007-07-08 9:43 ` Nick Piggin
2007-07-08 9:54 ` Ingo Molnar
2007-07-08 10:23 ` Nick Piggin
2007-07-08 10:42 ` Ingo Molnar
2007-07-08 18:02 ` Andrew Morton
2007-07-09 2:57 ` Nick Piggin
2007-07-09 11:04 ` Pekka Enberg
2007-07-09 11:16 ` Nick Piggin
2007-07-09 12:47 ` Pekka Enberg
2007-07-09 13:46 ` Pekka J Enberg
2007-07-09 16:08 ` Christoph Lameter
2007-07-09 16:08 ` Christoph Lameter
2007-07-10 8:17 ` Pekka J Enberg
2007-07-10 8:17 ` Pekka J Enberg
2007-07-10 8:27 ` Nick Piggin [this message]
2007-07-10 8:27 ` Nick Piggin
2007-07-10 9:31 ` Pekka Enberg
2007-07-10 9:31 ` Pekka Enberg
2007-07-10 10:09 ` Nick Piggin
2007-07-10 10:09 ` Nick Piggin
2007-07-10 12:02 ` Matt Mackall
2007-07-10 12:02 ` Matt Mackall
2007-07-10 12:57 ` Pekka J Enberg
2007-07-10 12:57 ` Pekka J Enberg
2007-07-10 22:12 ` Christoph Lameter
2007-07-10 22:40 ` Matt Mackall
2007-07-10 22:40 ` Matt Mackall
2007-07-10 22:50 ` Christoph Lameter
2007-07-10 22:50 ` Christoph Lameter
2007-07-09 16:06 ` Christoph Lameter
2007-07-09 16:51 ` Andrew Morton
2007-07-09 17:26 ` Christoph Lameter
2007-07-09 18:00 ` Andrew Morton
2007-07-10 1:43 ` Nick Piggin
2007-07-10 1:56 ` Christoph Lameter
2007-07-10 2:02 ` Nick Piggin
2007-07-10 2:11 ` Christoph Lameter
2007-07-10 7:09 ` Nick Piggin
2007-07-10 22:09 ` Christoph Lameter
2007-07-10 23:12 ` Matt Mackall
2007-07-10 8:32 ` Matt Mackall
2007-07-10 9:01 ` Håvard Skinnemoen
2007-07-10 9:11 ` Nick Piggin
2007-07-10 9:21 ` Håvard Skinnemoen
2007-07-11 1:37 ` Christoph Lameter
2007-07-11 2:06 ` Matt Mackall
2007-07-11 18:06 ` Christoph Lameter
2007-07-11 18:25 ` Pekka J Enberg
2007-07-11 18:33 ` Christoph Lameter
2007-07-11 18:36 ` Pekka J Enberg
2007-07-12 0:33 ` Nick Piggin
2007-07-09 23:09 ` Matt Mackall
2007-07-10 1:41 ` Nick Piggin
2007-07-10 1:51 ` Christoph Lameter
2007-07-10 1:58 ` Nick Piggin
2007-07-10 6:22 ` Matt Mackall
2007-07-10 7:03 ` Nick Piggin
2007-07-10 2:32 ` Matt Mackall
2007-07-09 21:57 ` Matt Mackall
2007-07-09 12:31 ` Matthieu CASTET
2007-07-09 16:00 ` Christoph Lameter
2007-07-09 20:52 ` Matt Mackall
2007-07-08 3:50 ` [patch 10/10] Remove slab in 2.6.24 Christoph Lameter
2007-07-08 4:37 ` [patch 00/10] [RFC] SLUB patches for more functionality, performance and maintenance David Miller
2007-07-09 15:45 ` Christoph Lameter
2007-07-09 19:43 ` David Miller
2007-07-09 21:21 ` Christoph Lameter
2007-07-08 11:20 ` Andi Kleen
2007-07-09 15:50 ` Christoph Lameter
2007-07-09 15:50 ` Christoph Lameter
2007-07-09 15:59 ` Martin Bligh
2007-07-09 15:59 ` Martin Bligh
2007-07-09 18:11 ` Christoph Lameter
2007-07-09 18:11 ` Christoph Lameter
2007-07-09 21:00 ` Martin Bligh
2007-07-09 21:00 ` Martin Bligh
2007-07-09 21:44 ` Mathieu Desnoyers
2007-07-09 21:44 ` Mathieu Desnoyers
2007-07-09 21:55 ` Christoph Lameter
2007-07-09 21:55 ` Christoph Lameter
2007-07-09 22:58 ` Mathieu Desnoyers
2007-07-09 22:58 ` Mathieu Desnoyers
2007-07-09 23:08 ` Christoph Lameter
2007-07-09 23:08 ` Christoph Lameter
2007-07-10 5:16 ` [PATCH] x86_64 - Use non locked version for local_cmpxchg() Mathieu Desnoyers
2007-07-10 5:16 ` Mathieu Desnoyers
2007-07-10 20:46 ` Christoph Lameter
2007-07-10 20:46 ` Christoph Lameter
2007-07-10 0:55 ` [patch 00/10] [RFC] SLUB patches for more functionality, performance and maintenance Christoph Lameter
2007-07-10 0:55 ` Christoph Lameter
2007-07-10 8:27 ` Mathieu Desnoyers
2007-07-10 8:27 ` Mathieu Desnoyers
2007-07-10 18:38 ` Christoph Lameter
2007-07-10 18:38 ` Christoph Lameter
2007-07-10 20:59 ` Mathieu Desnoyers
2007-07-10 20:59 ` Mathieu Desnoyers
2007-08-13 22:18 ` Mathieu Desnoyers
2007-08-13 22:18 ` Mathieu Desnoyers
2007-08-13 22:28 ` Christoph Lameter
2007-08-13 22:28 ` Christoph Lameter
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