linux-kernel - Re: [RFC] LZO de/compression support

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Message-ID: <a781481a0705250537o768c609evaf32d517444f7aca@mail.gmail.com>
Date:	Fri, 25 May 2007 18:07:55 +0530
From:	"Satyam Sharma" <satyam.sharma@...il.com>
To:	"Richard Purdie" <richard@...nedhand.com>
Cc:	"Nitin Gupta" <nitingupta910@...il.com>,
	linux-kernel@...r.kernel.org, linux-mm-cc@...top.org,
	"Andrew Morton" <akpm@...ux-foundation.org>,
	"Andrey Panin" <pazke@...pac.ru>, "Bret Towe" <magnade@...il.com>,
	"Michael-Luke Jones" <mlj28@....ac.uk>
Subject: Re: [RFC] LZO de/compression support - take 4

Hi Richard,

On 5/25/07, Richard Purdie <richard@...nedhand.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.

I hope you tested your _safe variant against this, Nitin has done away
with the _unsafe version in this patch. Also, are you using your crypto
lzo-support + tcrypt changes ( http://lkml.org/lkml/2007/5/1/303 ) to
benchmark these?

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

Right, if the difference is anything >10%, code cleanup does lose
its attractiveness.

Satyam
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