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Date: Wed, 28 Oct 2009 09:28:54 +0100 From: Jens Axboe <jens.axboe@...cle.com> To: Jeff Moyer <jmoyer@...hat.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] On Tue, Oct 27 2009, Jeff Moyer wrote: > 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. Sure, I'll pull it in. I still have the patches, will ping you if it doesn't apply cleanly. -- Jens Axboe -- 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/
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