linux-kernel - Re: [patch v4 0/3] aio: implement request batching [more performance numbers]

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <x49hbtk24o9.fsf@segfault.boston.devel.redhat.com>
Date:	Tue, 27 Oct 2009 12:16:22 -0400
From:	Jeff Moyer <jmoyer@...hat.com>
To:	Jens Axboe <jens.axboe@...cle.com>
Cc:	zach.brown@...cle.com, linux-aio <linux-aio@...ck.org>,
	Linux Kernel Mailing <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [patch v4 0/3] aio: implement request batching [more performance numbers]

Jens Axboe <jens.axboe@...cle.com> writes:

>> > Nice numbers! The patch looks good to me from a quick look, if you want
>> > I can throw it into the testing mix tomorrow and see what kind of
>> > improvements I see here. With performance increase of that magnitude, we
>> > should get it in sooner rather than later.
>> 
> So here's a pretty basic test. It does random reads from a bunch of
> devices, I tested both 4kb and 64kb block sizes. Queue depth used is 32
> for both cases, but note that this test uses a thread per device (so the
> queue depth is 32 per device). Results are averaged over 3 runs.
> slat/clat are the submission and completion latencies, they are in
> microseconds here.
[...]
> So pretty close, nothing earth shattering here. What the results above
> do not show is that the 4kb test runs very stable with your patch.
> Mainline fluctuates somewhat in the bandwidth, most likely due to the
> varying depth.

OK, I don't think this patch set will see further testing without
pulling it into someone's tree.  Jens, would you mind putting this into
your for-2.6.33 queue?  Let me know if you need me to resend the
patches.

Cheers,
Jeff
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/