linux-ext4 - Re: [PATCH -v2 0/3] jbd2 scalability patches

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Date:	Thu, 5 Aug 2010 01:42:11 -0400
From:	Ted Ts'o <tytso@....edu>
To:	john stultz <johnstul@...ibm.com>
Cc:	Ext4 Developers List <linux-ext4@...r.kernel.org>,
	ocfs2-devel@....oracle.com, Keith Maanthey <kmannth@...ibm.com>,
	Eric Whitney <eric.whitney@...com>
Subject: Re: [PATCH -v2 0/3] jbd2 scalability patches

Thanks, John, for doing these numbers!!!

> vfs + j_state lock + jdb2 scalability queue
> Throughput 1214.21 MB/sec 8 procs
> Throughput 1175.49 MB/sec 4 procs
> Throughput 716.294 MB/sec 2 procs
> Throughput 402.988 MB/sec 1 procs

2.6.35-rc6-vfs + atomic
Throughput 2648.42 MB/sec 8 procs
Throughput 1586.68 MB/sec 4 procs
Throughput 851.545 MB/sec 2 procs
Throughput 453.106 MB/sec 1 procs

Your earlier numbers were quite a bit higher than this latest set.  I
assume that's due to hardware differences?

					- Ted
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