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Date: Mon, 26 Feb 2007 13:40:29 -0800 (PST)
From: Davide Libenzi <davidel@xmailserver.org>
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To: Jens Axboe <jens.axboe@oracle.com>
cc: Suparna Bhattacharya <suparna@in.ibm.com>, Ingo Molnar <mingo@elte.hu>,
       Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
       Linus Torvalds <torvalds@linux-foundation.org>,
       Arjan van de Ven <arjan@infradead.org>,
       Christoph Hellwig <hch@infradead.org>, Andrew Morton <akpm@zip.com.au>,
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       Ulrich Drepper <drepper@redhat.com>, Zach Brown <zach.brown@oracle.com>,
       Evgeniy Polyakov <johnpol@2ka.mipt.ru>,
       "David S. Miller" <davem@davemloft.net>,
       Thomas Gleixner <tglx@linutronix.de>
Subject: Re: A quick fio test (was Re: [patch 00/13] Syslets, "Threadlets",
 generic AIO support, v3)
In-Reply-To: <20070226135736.GF3822@kernel.dk>
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References: <20070221211355.GA7302@elte.hu> <20070223125247.GO5737@kernel.dk>
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On Mon, 26 Feb 2007, Jens Axboe wrote:

> 
> Some more results, using a larger number of processes and io depths. A
> repeat of the tests from friday, with added depth 20000 for syslet and
> libaio:
> 
> Engine          Depth   Processes       Bw (MiB/sec)
> ----------------------------------------------------
> libaio            1         1            602
> syslet            1         1            759
> sync              1         1            776
> libaio           32         1            832
> syslet           32         1            898
> libaio        20000         1            581
> syslet        20000         1            609

That looks great! IMO there may be a little higher cost associated with 
the syslets thread switches, that we currently do not perform 100% 
cleanly, but results look nevertheless awesome.



- Davide


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