mirror of https://lore.kernel.org/lkml/
 help / color / mirror / Atom feed
From: "Nitin Gupta" <nitingupta910@gmail.com>
To: "Richard Purdie" <richard@openedhand.com>
Cc: linux-kernel@vger.kernel.org, linux-mm-cc@laptop.org,
	"Andrew Morton" <akpm@linux-foundation.org>,
	"Satyam Sharma" <satyam.sharma@gmail.com>,
	"Andrey Panin" <pazke@donpac.ru>, "Bret Towe" <magnade@gmail.com>,
	"Michael-Luke Jones" <mlj28@cam.ac.uk>
Subject: Re: [RFC] LZO de/compression support - take 4
Date: Fri, 25 May 2007 18:27:21 +0530	[thread overview]
Message-ID: <4cefeab80705250557w1baee0afn255e37436b6545a@mail.gmail.com> (raw)
In-Reply-To: <1180095000.5864.48.camel@localhost.localdomain>

[-- Attachment #1: Type: text/plain, Size: 1150 bytes --]

Hi Richard,

On 5/25/07, Richard Purdie <richard@openedhand.com> wrote:
> On Fri, 2007-05-25 at 17:15 +0530, Nitin Gupta wrote:
> > Richard, can you please provide perf. results for this patch also?
> > Also, can you please mail back latest version of your LZO patch? In
> > meantime, I will try to include benchmarking support to the
> > 'compress-test' module.
>
> This version is 15% slower at decompression and about equal on
> compression.
>

If you don't mind, can you please try patch attached now? I have now
also rolled back that cpu_to_le16() change as Satyam suggested. I see
no other reason for this perf. loss as I made no other change!

Also, can you please verify if you are comparing your _safe_ version
with this patch? This patch does not include unsafe version and the
safe one is simply called lzo1x_decompress().


> I am however still strongly of the opinion that we should just use the
> version in -mm (which is my latest version).
>

I love this cleaned-up patch just sooo much! :)
Anyhow, if we can spend just small time scanning through these ~500
LOC to find reasons for any perf. loss, we will gain a lot!

Thanks,
Nitin

[-- Attachment #2: patch_lzo_2.6.22-rc2_richard_test.bz2 --]
[-- Type: application/x-bzip2, Size: 4727 bytes --]

  parent reply	other threads:[~2007-05-25 12:57 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-05-25 11:45 Nitin Gupta
2007-05-25 12:00 ` Michael-Luke Jones
2007-05-25 12:10 ` Richard Purdie
2007-05-25 12:37   ` Satyam Sharma
2007-05-25 13:38     ` Richard Purdie
2007-05-25 16:55       ` Daniel Hazelton
2007-05-25 18:45         ` Daniel Hazelton
2007-05-25 19:35           ` Satyam Sharma
2007-05-28  8:18             ` Daniel Hazelton
2007-05-28  8:37               ` Nitin Gupta
2007-05-28  8:43                 ` Daniel Hazelton
2007-05-28  9:08                   ` Nitin Gupta
2007-05-28  9:21                     ` Daniel Hazelton
2007-05-28  9:46                       ` Nitin Gupta
2007-05-28  9:58                         ` Daniel Hazelton
2007-05-25 12:57   ` Nitin Gupta [this message]
2007-05-25 13:33     ` Richard Purdie
2007-05-26 10:28     ` Richard Purdie
2007-05-26 11:21       ` Nitin Gupta
2007-05-25 12:32 ` Satyam Sharma
2007-05-26 19:17 roland

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=4cefeab80705250557w1baee0afn255e37436b6545a@mail.gmail.com \
    --to=nitingupta910@gmail.com \
    --cc=akpm@linux-foundation.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-mm-cc@laptop.org \
    --cc=magnade@gmail.com \
    --cc=mlj28@cam.ac.uk \
    --cc=pazke@donpac.ru \
    --cc=richard@openedhand.com \
    --cc=satyam.sharma@gmail.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

all inboxes | Powered by JetHome®