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Date: Thu, 25 Sep 2014 10:25:05 +0200 From: Jesper Dangaard Brouer <brouer@...hat.com> To: Jamal Hadi Salim <jhs@...atatu.com> Cc: Eric Dumazet <eric.dumazet@...il.com>, netdev@...r.kernel.org, therbert@...gle.com, "David S. Miller" <davem@...emloft.net>, Alexander Duyck <alexander.h.duyck@...el.com>, toke@...e.dk, Florian Westphal <fw@...len.de>, Dave Taht <dave.taht@...il.com>, John Fastabend <john.r.fastabend@...el.com>, Daniel Borkmann <dborkman@...hat.com>, Hannes Frederic Sowa <hannes@...essinduktion.org>, brouer@...hat.com Subject: Re: [net-next PATCH 1/1 V4] qdisc: bulk dequeue support for qdiscs with TCQ_F_ONETXQUEUE On Wed, 24 Sep 2014 18:13:57 -0400 Jamal Hadi Salim <jhs@...atatu.com> wrote: > On 09/24/14 13:58, Jesper Dangaard Brouer wrote: > > On Wed, 24 Sep 2014 10:23:15 -0700 > > Eric Dumazet <eric.dumazet@...il.com> wrote: > > > > > > >> pktgen is nice, but do not represent the majority of the traffic we send > >> from high performance host where we want this bulk dequeue thing ;) > > > > This patch is actually targetted towards more normal use-cases. > > Pktgen cannot even use this work, as it bypass the qdisc layer... > > When you post these patches - can you please also post basic performance > numbers? You dont have to show improvement if it is hard for bulking > to kick in, but you need to show no harm in at least latency for the > general use case (i.e not pktgen maybe forwarding activity or something > sourced from tcp). I've done measurements with netperf-wrapper: http://netoptimizer.blogspot.dk/2014/09/mini-tutorial-for-netperf-wrapper-setup.html I have already previously posted my measurements here: http://people.netfilter.org/hawk/qdisc/ http://people.netfilter.org/hawk/qdisc/measure01/ http://people.netfilter.org/hawk/qdisc/experiment01/ Please, see my previous mail where I described each graph. The above measurements is for 10Gbit/s, but I've also done measurements on 1Gbit/s driver igb, and 10Mbit/s by forcing igb to use 10Mbit/s. Those results I forgot upload (and I cannot upload them right now, as I'm currently in Switzerland). -- Best regards, Jesper Dangaard Brouer MSc.CS, Sr. Network Kernel Developer at Red Hat Author of http://www.iptv-analyzer.org LinkedIn: http://www.linkedin.com/in/brouer -- 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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