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

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Date:	Thu, 05 Aug 2010 10:42:08 -0700
From:	john stultz <johnstul@...ibm.com>
To:	"Ted Ts'o" <tytso@....edu>
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

On Thu, 2010-08-05 at 01:42 -0400, Ted Ts'o wrote:
> 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?

So yes, it was run on a different but similar system.

But the numbers I just provided here were with CONFIG_PREEMPT_RT (vfs:
2.6.33-rt23 or novfs: 2.6.33-rt29). Sorry for not making that explicit.

Do you want me to generate non-rt 2.6.35 numbers as well?

thanks
-john


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