From mboxrd@z Thu Jan  1 00:00:00 1970
From: Oleg Drokin <green@namesys.com>
Subject: Re: ReiserFS causes CPU high usage?!
Date: Fri, 28 Feb 2003 10:51:45 +0300
Message-ID: <20030228105145.C1234@namesys.com>
References: <200302280011.14488.liviu.voicu@huji.ac.il>
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To: Voicu Liviu <liviu.voicu@huji.ac.il>
Cc: reiserfs-list@namesys.com

Hello!

On Fri, Feb 28, 2003 at 12:11:14AM +0200, Voicu Liviu wrote:

> Any clue what is going on?
> Maybe ReiserFS uses the cpu harder?

reiserfs is using more CPU than ext2/ext3. It's maintaining its metadata in
balanced tree. Each tree update often requires shifting of some of the data
between or inside of tree nodes. That's where CPU time is going.


> I have to fix the CPU usage icon_sad.gif I makes me crazy...simple emerge 
> loads the CPU to 90 ~ 95%

Make sure you do not have "CONFIG_REISERFS_CHECK" enabled in you kernel config,
as this enables lots of extra checks in reiserfs code that consume even more CPU.

Bye,
    Oleg