From mboxrd@z Thu Jan 1 00:00:00 1970 From: Vladislav Bolkhovitin Subject: Re: [PATCH 0/8] ib/iser: major face lift of the data path code Date: Fri, 05 Feb 2010 15:18:27 +0300 Message-ID: <4B6C0C93.2090107@vlnb.net> References: <4B6AD7D5.7030204@Voltaire.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <4B6AD7D5.7030204-hKgKHo2Ms0FWk0Htik3J/w@public.gmane.org> Sender: linux-rdma-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Or Gerlitz Cc: Bart Van Assche , Roland Dreier , linux-rdma , Mike Christie , Yaron Haviv List-Id: linux-rdma@vger.kernel.org Or Gerlitz, on 02/04/2010 05:21 PM wrote: > Bart Van Assche wrote: >> Sounds really interesting. Do you have numbers available about how >> much these patches improve throughput or decrease latency ? > > Yes, generally speaking after the patches the initiator peaks to about 300-400K IOPS > with latency under such load being 20-30us and before the patches the initiator was > doing upto 200K IOPS with the latency under such load being 50-100us From where did you get those latency numbers? I can estimate only IOPS numbers from your results. >, see some data > I got today on mytest bed. Being focused on the initiator, I was using a "NULL device" > at the target side. > > AFTER > > r b swpd free buff cache si so bi bo in cs us sy id wa st > 11 11 0 6212936 260552 367356 0 0 308671 0 285596 492842 4 64 0 31 0 > 7 13 0 6212936 260552 367356 0 0 309628 24 285138 496537 5 61 0 33 0 > 10 12 0 6212936 260552 367356 0 0 308222 0 277868 489261 4 65 0 30 0 > 8 13 0 6212936 260552 367356 0 0 310724 0 282151 493868 4 67 0 29 0 > 12 11 0 6212936 260552 367356 0 0 308209 0 278753 489797 5 66 0 29 0 > > Linux 2.6.33-rc4 (cto-1) 02/04/2010 > > avg-cpu: %user %nice %system %iowait %steal %idle > 4.62 0.00 66.29 28.71 0.00 0.37 > > Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s avgrq-sz avgqu-sz await svctm %util > sdd 0.00 0.00 88905.94 0.00 177811.88 0.00 2.00 2.82 0.03 0.01 98.61 > sdf 0.00 0.00 64021.78 0.00 128045.54 0.00 2.00 2.55 0.04 0.02 96.24 > sdh 0.00 0.00 88922.77 0.00 177845.54 0.00 2.00 2.85 0.03 0.01 99.01 > sdj 0.00 0.00 64662.38 0.00 129324.75 0.00 2.00 2.69 0.04 0.02 97.82 > > BEFORE > > r b swpd free buff cache si so bi bo in cs us sy id wa st > 6 14 0 6211804 260684 368584 0 0 195551 0 195997 557463 3 56 4 37 0 > 7 13 0 6211804 260684 368584 0 0 191347 0 192311 525823 3 58 3 36 0 > 6 15 0 6211804 260692 368584 0 0 187135 16 190875 503739 3 58 3 35 0 > 8 14 0 6211804 260692 368584 0 0 193745 0 193921 556821 3 55 4 38 0 > 8 16 0 6211804 260692 368584 0 0 191233 0 191549 536499 3 58 4 35 0 > > Linux 2.6.33-rc4 (cto-1) 02/04/2010 > > avg-cpu: %user %nice %system %iowait %steal %idle > 2.24 0.00 58.16 35.87 0.00 3.74 > > Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s avgrq-sz avgqu-sz await svctm %util > sdd 0.00 0.00 33964.00 0.00 67928.00 0.00 2.00 3.36 0.10 0.03 100.00 > sdf 0.00 0.00 33456.00 0.00 66912.00 0.00 2.00 3.34 0.10 0.03 99.60 > sdh 0.00 0.00 63176.00 0.00 126352.00 0.00 2.00 3.40 0.05 0.02 100.00 > sdj 0.00 0.00 62973.00 0.00 125946.00 0.00 2.00 3.38 0.05 0.02 100.40 > > -- > To unsubscribe from this list: send the line "unsubscribe linux-rdma" in > the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html