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 PHC | |
Open Source and information security mailing list archives
| ||
|
Date: Wed, 07 Oct 2009 08:09:10 -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: > 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. > > 4kb random reads > > kernel sys IOPS slat clat > ---------------------------------------------------- > 2.6.32-rc3+patch 25.8% 192500 7.9 2606 > 2.6.32-rc3 27.4% 191300 8.4 2612 > > > > 64kb random reads > > kernel sys IOPS slat clat > ---------------------------------------------------- > 2.6.32-rc3+patch 2.5% 24590 9.7 9681 > 2.6.32-rc3 2.5% 24580 9.4 9691 > > 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, good news. Thanks for testing! 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/
Powered by blists - more mailing lists