From: Eric Dumazet <dada1@cosmosbay.com>
To: Ingo Molnar <mingo@elte.hu>
Cc: Steven Rostedt <rostedt@goodmis.org>,
Pekka Enberg <penberg@cs.helsinki.fi>,
Christoph Lameter <christoph@lameter.com>,
Alok N Kataria <alokk@calsoftinc.com>,
Shobhit Dayal <shobhit@calsoftinc.com>,
Shai Fultheim <shai@scalex86.org>, Matt Mackall <mpm@selenic.com>,
Andrew Morton <akpm@osdl.org>, john stultz <johnstul@us.ibm.com>,
Gunter Ohrner <G.Ohrner@post.rwth-aachen.de>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH RT 00/02] SLOB optimizations
Date: Thu, 22 Dec 2005 23:08:09 +0100 [thread overview]
Message-ID: <43AB23C9.8010904@cosmosbay.com> (raw)
In-Reply-To: <20051222211132.GA21742@elte.hu>
Ingo Molnar a écrit :
>
> CLI/STI is extremely fast. (In fact in the -rt tree i'm using them
> within mutexes instead of preempt_enable()/preempt_disable(), because
> they are faster and generate less register side-effect.)
>
Yes, but most of my machines have a ! CONFIG_PREEMPT kernel, so
preempt_enable()/preempt_disable() are empty, thus faster than CLI/STI for sure :)
Then, maybe the patch that moves 'current' in a dedicated x86_64 register may
help to lower the cost of preempt_enable()/preempt_disable() on a
CONFIG_PREEMPT kernel ?
Eric
next prev parent reply other threads:[~2005-12-22 22:08 UTC|newest]
Thread overview: 56+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-12-16 11:30 2.6.15-rc5-rt2 slowness Gunter Ohrner
2005-12-16 11:42 ` Gunter Ohrner
2005-12-16 12:04 ` Gunter Ohrner
2005-12-16 12:34 ` Steven Rostedt
2005-12-16 12:32 ` Steven Rostedt
2005-12-16 22:58 ` john stultz
2005-12-17 0:22 ` Gunter Ohrner
2005-12-17 3:51 ` Steven Rostedt
2005-12-17 3:33 ` Steven Rostedt
2005-12-17 22:57 ` Steven Rostedt
2005-12-18 16:05 ` K.R. Foley
2005-12-20 13:32 ` Ingo Molnar
2005-12-20 13:38 ` Steven Rostedt
2005-12-20 13:57 ` Ingo Molnar
2005-12-20 14:04 ` Steven Rostedt
2005-12-20 14:33 ` Steven Rostedt
2005-12-20 15:07 ` Ingo Molnar
2005-12-20 15:16 ` Steven Rostedt
2005-12-20 15:44 ` [PATCH RT 00/02] SLOB optimizations Steven Rostedt
2005-12-20 15:56 ` Steven Rostedt
2005-12-20 15:58 ` Ingo Molnar
2005-12-20 16:13 ` Ingo Molnar
2005-12-20 16:29 ` Steven Rostedt
2005-12-20 16:39 ` Steven Rostedt
2005-12-20 18:19 ` Matt Mackall
2005-12-20 19:15 ` Steven Rostedt
2005-12-20 19:43 ` Matt Mackall
2005-12-20 20:06 ` Steven Rostedt
2005-12-20 20:15 ` Pekka Enberg
2005-12-20 21:42 ` Steven Rostedt
2005-12-20 21:52 ` Christoph Lameter
2005-12-20 22:11 ` Steven Rostedt
2005-12-21 6:36 ` Ingo Molnar
2005-12-21 12:50 ` Steven Rostedt
2005-12-21 6:56 ` Ingo Molnar
2005-12-21 7:16 ` Pekka J Enberg
2005-12-21 7:50 ` Ingo Molnar
2005-12-21 13:13 ` Steven Rostedt
2005-12-21 15:34 ` [PATCH] SLAB - have index_of bug at compile time Steven Rostedt
2005-12-21 7:20 ` [PATCH RT 00/02] SLOB optimizations Eric Dumazet
2005-12-21 7:43 ` Ingo Molnar
2005-12-21 8:02 ` Eric Dumazet
2005-12-22 18:02 ` Zwane Mwaikambo
2005-12-22 21:11 ` Ingo Molnar
2005-12-22 21:39 ` Eric Dumazet
2005-12-22 21:44 ` George Anzinger
2005-12-22 22:00 ` Eric Dumazet
2005-12-22 22:08 ` Eric Dumazet [this message]
2005-12-23 19:22 ` Zwane Mwaikambo
2005-12-21 13:02 ` Steven Rostedt
2005-12-21 2:30 ` Nick Piggin
2005-12-21 2:41 ` Steven Rostedt
2005-12-20 15:44 ` [PATCH RT 01/02] SLOB - remove bigblock list Steven Rostedt
2005-12-20 15:44 ` [PATCH RT 02/02] SLOB - break SLOB up by caches Steven Rostedt
2005-12-20 14:07 ` 2.6.15-rc5-rt2 slowness Steven Rostedt
2005-12-20 15:26 ` K.R. Foley
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=43AB23C9.8010904@cosmosbay.com \
--to=dada1@cosmosbay.com \
--cc=G.Ohrner@post.rwth-aachen.de \
--cc=akpm@osdl.org \
--cc=alokk@calsoftinc.com \
--cc=christoph@lameter.com \
--cc=johnstul@us.ibm.com \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@elte.hu \
--cc=mpm@selenic.com \
--cc=penberg@cs.helsinki.fi \
--cc=rostedt@goodmis.org \
--cc=shai@scalex86.org \
--cc=shobhit@calsoftinc.com \
/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.