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Date: Mon, 16 Jul 2012 17:47:17 -0300 From: Thadeu Lima de Souza Cascardo <cascardo@...ux.vnet.ibm.com> To: Rick Jones <rick.jones2@...com> Cc: "davem@...emloft.net" <davem@...emloft.net>, "netdev@...r.kernel.org" <netdev@...r.kernel.org>, "yevgenyp@...lanox.co.il" <yevgenyp@...lanox.co.il>, "ogerlitz@...lanox.com" <ogerlitz@...lanox.com>, "amirv@...lanox.com" <amirv@...lanox.com>, "brking@...ux.vnet.ibm.com" <brking@...ux.vnet.ibm.com>, "leitao@...ux.vnet.ibm.com" <leitao@...ux.vnet.ibm.com>, "klebers@...ux.vnet.ibm.com" <klebers@...ux.vnet.ibm.com>, "linuxppc-dev@...ts.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>, "anton@...ba.org" <anton@...ba.org> Subject: Re: [PATCH] mlx4_en: map entire pages to increase throughput On Mon, Jul 16, 2012 at 12:42:41PM -0700, Rick Jones wrote: > On 07/16/2012 12:06 PM, Thadeu Lima de Souza Cascardo wrote: > >On Mon, Jul 16, 2012 at 10:27:57AM -0700, Rick Jones wrote: > > > >>What is the effect on packet-per-second performance? (eg aggregate, > >>burst-mode netperf TCP_RR with TCP_NODELAY set or perhaps UDP_RR) > >> > >I used uperf with TCP_NODELAY and 16 threads sending from another > >machine 64000-sized writes for 60 seconds. > > > >I get 5898op/s (3.02Gb/s) without the patch against 18022ops/s > >(9.23Gb/s) with the patch. > > I was thinking more along the lines of an additional comparison, > explicitly using netperf TCP_RR or something like it, not just the > packets per second from a bulk transfer test. > > rick > -- > To unsubscribe from this list: send the line "unsubscribe netdev" in > the body of a message to majordomo@...r.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > I used a uperf profile that is similar to TCP_RR. It writes, then reads some bytes. I kept the TCP_NODELAY flag. Without the patch, I saw the following: packet size ops/s Gb/s 1 337024 0.0027 90 276620 0.199 900 190455 1.37 4000 68863 2.20 9000 45638 3.29 60000 9409 4.52 With the patch: packet size ops/s Gb/s 1 451738 0.0036 90 345682 0.248 900 272258 1.96 4000 127055 4.07 9000 106614 7.68 60000 30671 14.72 -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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