linux-ext4 - Re: [PATCH 0/2] ext2, ext3: speed up file create workloads

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Message-ID: <20110106144735.GJ4641@quack.suse.cz>
Date:	Thu, 6 Jan 2011 15:47:35 +0100
From:	Jan Kara <jack@...e.cz>
To:	Eric Sandeen <sandeen@...hat.com>
Cc:	ext4 development <linux-ext4@...r.kernel.org>,
	Jan Kara <jack@...e.cz>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH 0/2] ext2, ext3: speed up file create workloads

On Tue 07-12-10 11:47:51, Eric Sandeen wrote:
> The addition of 64k block capability in the rec_len_from_disk
> and rec_len_to_disk functions added a bit of math overhead which
> slows down file create workloads needlessly when the architecture
> cannot even support 64k blocks, thanks to page size limits.
> 
> The directory entry checking can also be optimized a bit
> by sprinkling in some unlikely() conditions to move the
> error handling out of line.
> 
> These 2 patches speed up a bonnie++ file creation workload for
> me by several percent on ext2 & ext3.
  Thanks. I've merged both patches into my tree.

							Honza
-- 
Jan Kara <jack@...e.cz>
SUSE Labs, CR
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