Date: Wed, 12 Oct 2005 12:07:31 +0200
From: Pavel Machek <pavel@suse.cz>
To: Felix Oxley <lkml@oxley.org>
Cc: OBATA Noboru <noboru.obata.ar@hitachi.com>, hyoshiok@miraclelinux.com,
       linux-kernel@vger.kernel.org
Subject: Re: Linux Kernel Dump Summit 2005
Message-ID: <20051012100730.GO12682@elf.ucw.cz>
References: <20051010084535.GA2298@elf.ucw.cz> <200510121002.59098.lkml@oxley.org> <20051012090945.GN12682@elf.ucw.cz> <200510121056.48429.lkml@oxley.org>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <200510121056.48429.lkml@oxley.org>
User-Agent: Mutt/1.5.9i
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 1037
Lines: 28

On St 12-10-05 10:56:46, Felix Oxley wrote:
> 
> Thank you for helping a clueless newbie :-)
> 
> > Notice that suspend2 project actually introduced compression *for
> > speed*. Doing it right means that it is faster to do it
> > compressed. 
> 
> I see! 
> Little benchmarks here: http://wiki.suspend2.net/BenchMarks
> shows 15% speed _increase_ with compression.
> 
> > See Jamie Lokier's description how to *never* slow down. 
> Sorry, where is this?

Somewhere on the lkml, *long* ago. Basically idea is to have one
thread doing writing to disk, and second thread doing compression. If
no compressed pages are available, just write uncompressed ones. That
way compression can only speed things up.

								Pavel
-- 
if you have sharp zaurus hardware you don't need... you know my address
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/