From: Chris Wright <chrisw@osdl.org>
To: Ravikiran G Thirumalai <kiran@in.ibm.com>
Cc: linux-kernel@vger.kernel.org, dipankar@in.ibm.com
Subject: Re: [RFC] Lock free fd lookup
Date: Wed, 14 Jul 2004 08:17:37 -0700 [thread overview]
Message-ID: <20040714081737.N1973@build.pdx.osdl.net> (raw)
In-Reply-To: <20040714045640.GB1220@obelix.in.ibm.com>; from kiran@in.ibm.com on Wed, Jul 14, 2004 at 10:26:42AM +0530
* Ravikiran G Thirumalai (kiran@in.ibm.com) wrote:
> This makes use of the lockfree refcounting infrastructure (see earlier
> posting today) to make files_struct.fd[] lookup lockfree. This is carrying
> forward work done by Maneesh and Dipankar earlier.
>
> With the lockfree fd lookup patch, tiobench performance increases by 13%
> for sequential reads, 21 % for random reads on a 4 processor pIII xeon.
I'm curious, how much of the performance improvement is from RCU usage
vs. making the basic syncronization primitive aware of a reader and
writer distinction? Do you have benchmark for simply moving to rwlock_t?
thanks,
-chris
--
Linux Security Modules http://lsm.immunix.org http://lsm.bkbits.net
next prev parent reply other threads:[~2004-07-14 15:17 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-07-14 4:53 [RFC] Refcounting of objects part of a lockfree collection Ravikiran G Thirumalai
2004-07-14 4:56 ` [RFC] Lock free fd lookup Ravikiran G Thirumalai
2004-07-14 15:17 ` Chris Wright [this message]
2004-07-15 14:22 ` Jesse Barnes
2004-07-15 16:10 ` Dipankar Sarma
2004-07-15 16:22 ` Jesse Barnes
2004-07-15 16:34 ` Chris Wright
2004-07-16 5:38 ` Ravikiran G Thirumalai
2004-07-16 6:27 ` William Lee Irwin III
2004-07-17 0:55 ` Keith Owens
2004-07-17 1:19 ` William Lee Irwin III
2004-07-17 2:12 ` Keith Owens
2004-07-17 2:34 ` William Lee Irwin III
2004-07-17 2:28 ` Keith Owens
2004-07-17 3:16 ` William Lee Irwin III
2004-07-17 13:48 ` Peter Zijlstra
2004-07-14 7:07 ` [RFC] Refcounting of objects part of a lockfree collection Greg KH
2004-07-14 8:26 ` Dipankar Sarma
2004-07-14 14:26 ` Greg KH
2004-07-14 15:22 ` Dipankar Sarma
2004-07-14 17:03 ` Greg KH
2004-07-14 17:49 ` Dipankar Sarma
2004-07-14 18:03 ` Greg KH
2004-07-15 6:21 ` Ravikiran G Thirumalai
2004-07-15 6:56 ` Dipankar Sarma
2004-07-14 8:57 ` Ravikiran G Thirumalai
2004-07-14 17:08 ` Greg KH
2004-07-14 18:17 ` Dipankar Sarma
2004-07-15 8:02 ` Ravikiran G Thirumalai
2004-07-15 9:36 ` Dipankar Sarma
2004-07-16 14:32 ` Greg KH
2004-07-16 15:50 ` Ravikiran G Thirumalai
-- strict thread matches above, loose matches on Subject: below --
2004-07-17 8:50 [RFC] Lock free fd lookup Manfred Spraul
2004-07-17 9:30 ` William Lee Irwin III
2004-07-17 19:17 Albert Cahalan
2004-07-29 0:14 ` William Lee Irwin III
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=20040714081737.N1973@build.pdx.osdl.net \
--to=chrisw@osdl.org \
--cc=dipankar@in.ibm.com \
--cc=kiran@in.ibm.com \
--cc=linux-kernel@vger.kernel.org \
/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.