All of lore.kernel.org
 help / color / mirror / Atom feed
From: Paul Jackson <pj@sgi.com>
To: Eric Dumazet <dada1@cosmosbay.com>
Cc: akpm@osdl.org, linux-kernel@vger.kernel.org,
	nickpiggin@yahoo.com.au, Simon.Derr@bull.net, ak@suse.de,
	clameter@sgi.com
Subject: Re: [PATCH] Cpuset: rcu optimization of page alloc hook
Date: Tue, 13 Dec 2005 14:35:00 -0800	[thread overview]
Message-ID: <20051213143500.96c9aecd.pj@sgi.com> (raw)
In-Reply-To: <439F2F39.3090800@cosmosbay.com>

Eric wrote:
> But the initial pointer *should* be in a cache line shared by all cpus to get 
> best performance. 

No - not if that pointer is seldom used.  Then its location does not
directly affect performance at all, and better for it to be used as
"inert filler" to fill out cache lines of words that are write hot.

-- 
                  I won't rest till it's the best ...
                  Programmer, Linux Scalability
                  Paul Jackson <pj@sgi.com> 1.925.600.0401

  reply	other threads:[~2005-12-13 22:35 UTC|newest]

Thread overview: 32+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2005-12-11 23:31 [PATCH] Cpuset: rcu optimization of page alloc hook Paul Jackson
2005-12-12  3:29 ` Andi Kleen
2005-12-12  6:11   ` Paul Jackson
2005-12-12  6:21     ` Andi Kleen
2005-12-12  6:50       ` Paul Jackson
2005-12-12  8:49 ` Eric Dumazet
2005-12-12  8:54   ` Nick Piggin
2005-12-12  9:06     ` Eric Dumazet
2005-12-12  9:11     ` Andrew Morton
2005-12-12  9:38       ` Nick Piggin
2005-12-12 10:02   ` Paul Jackson
2005-12-12 10:12     ` Andrew Morton
2005-12-13 15:53       ` Paul Jackson
2005-12-13 16:31         ` Eric Dumazet
2005-12-13 17:42           ` Christoph Lameter
2005-12-13 17:56             ` Eric Dumazet
2005-12-13 18:07               ` Christoph Lameter
2005-12-13 21:03               ` Paul Jackson
2005-12-13 21:16                 ` Christoph Lameter
2005-12-13 21:38                 ` Eric Dumazet
2005-12-13 22:23                   ` Paul Jackson
2005-12-13 22:29                     ` Christoph Lameter
2005-12-14  3:54                     ` Paul Jackson
2005-12-14  4:02                       ` Andi Kleen
2005-12-14  4:06                         ` Paul Jackson
2005-12-14  8:06                     ` Eric Dumazet
2005-12-14  8:40                       ` Paul Jackson
2005-12-13 20:08           ` Paul Jackson
2005-12-13 20:29             ` Eric Dumazet
2005-12-13 22:35               ` Paul Jackson [this message]
2005-12-13 21:44           ` Paul Jackson
2005-12-13 17:37         ` Christoph Lameter

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=20051213143500.96c9aecd.pj@sgi.com \
    --to=pj@sgi.com \
    --cc=Simon.Derr@bull.net \
    --cc=ak@suse.de \
    --cc=akpm@osdl.org \
    --cc=clameter@sgi.com \
    --cc=dada1@cosmosbay.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=nickpiggin@yahoo.com.au \
    /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.