From: George Anzinger <george@mvista.com>
To: Ingo Molnar <mingo@elte.hu>
Cc: Eric Dumazet <dada1@cosmosbay.com>,
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 13:44:53 -0800 [thread overview]
Message-ID: <43AB1E55.6040703@mvista.com> (raw)
In-Reply-To: <20051222211132.GA21742@elte.hu>
> that's just the profiling interrupt hitting them. You should not analyze
> irq-safe code with a non-NMI profiling interrupt.
>
> 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.)
>
Hm... I rather thought that the cli would cause a rather large hit on
the pipeline and certainly on OOE. Is your observation based on any
particular instruction stream? Sti, on the otherhand should be fast...
--
George Anzinger george@mvista.com
HRT (High-res-timers): http://sourceforge.net/projects/high-res-timers/
next prev parent reply other threads:[~2005-12-22 21:47 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 [this message]
2005-12-22 22:00 ` Eric Dumazet
2005-12-22 22:08 ` Eric Dumazet
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=43AB1E55.6040703@mvista.com \
--to=george@mvista.com \
--cc=G.Ohrner@post.rwth-aachen.de \
--cc=akpm@osdl.org \
--cc=alokk@calsoftinc.com \
--cc=christoph@lameter.com \
--cc=dada1@cosmosbay.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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox