From: Nick Piggin <nickpiggin@yahoo.com.au>
To: Pekka Enberg <penberg@cs.helsinki.fi>
Cc: Matt Mackall <mpm@selenic.com>,
linux-kernel <linux-kernel@vger.kernel.org>,
akpm@linux-foundation.org, Christoph Lameter <clameter@sgi.com>
Subject: Re: [PATCH] slob: reduce list scanning
Date: Mon, 16 Jul 2007 18:37:33 +1000 [thread overview]
Message-ID: <469B2E4D.6050404@yahoo.com.au> (raw)
In-Reply-To: <84144f020707160022p37a2d712g21c3d5c89ed6345d@mail.gmail.com>
Pekka Enberg wrote:
> On 7/16/07, Nick Piggin <nickpiggin@yahoo.com.au> wrote:
>
>> Actually SLOB potentially has some fundamental CPU cache hotness
>> advantages over the other allocators, for the same reasons as
>> its space advantages.
>
>
> Because consecutive allocations hit the same cache-hot page regardless
> of requested size where as SLUB by definition distributes allocations
> to different pages (some of which may not be hot)?
Yeah, that, and also a newly freed slab object is quite likely to be
hot, and that memory can be used by another subsequent allocation --
not always, because the allocation heuristics may not place it there,
but there is potential that is impossible with slab allocators.
--
SUSE Labs, Novell Inc.
next prev parent reply other threads:[~2007-07-16 8:38 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-07-14 5:54 [PATCH] slob: reduce list scanning Matt Mackall
2007-07-16 6:01 ` Nick Piggin
2007-07-16 7:22 ` Pekka Enberg
2007-07-16 8:37 ` Nick Piggin [this message]
2007-07-16 16:49 ` Matt Mackall
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=469B2E4D.6050404@yahoo.com.au \
--to=nickpiggin@yahoo.com.au \
--cc=akpm@linux-foundation.org \
--cc=clameter@sgi.com \
--cc=linux-kernel@vger.kernel.org \
--cc=mpm@selenic.com \
--cc=penberg@cs.helsinki.fi \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.