Date: Mon, 13 Mar 2017 13:13:55 -0400 From: John Jasen <jjasen@gmail.com> To: Navdeep Parhar <nparhar@gmail.com> Cc: Slawa Olhovchenkov <slw@zxy.spb.ru>, "freebsd-net@freebsd.org" <freebsd-net@freebsd.org>, "Caraballo-vega, Jordan A." <jordancaraballo87@gmail.com> Subject: Re: bad throughput performance on multiple systems: Re: Fwd: Re: Disappointing packets-per-second performance results on a Dell,PE R530 Message-ID: <173fffac-7ae2-786a-66c0-e9cd7ab78f44@gmail.com> In-Reply-To: <CAPFoGT9k4HfDCQ7wJPDFMTrJTtDyc9uK_ma9ubneDhVSsS-jcA@mail.gmail.com> References: <ebb04a3e-bcde-6d50-af63-348e8d06fcba@gmail.com> <40a413f3-2c44-ee9d-9961-67114d8dffca@gmail.com> <20170205175531.GA20287@dwarf> <7d349edd-0c81-2e3f-d3b9-27af232de76d@gmail.com> <20170209153409.GG41673@dwarf> <6ad029e0-86c6-af3d-8fc3-694d4bcdc683@gmail.com> <b460cc49-364a-34fb-e212-582730546dee@gmail.com> <20170312231826.GV15630@zxy.spb.ru> <74654520-b8b6-6118-2e46-902a8ea107ac@gmail.com> <CAPFoGT9k4HfDCQ7wJPDFMTrJTtDyc9uK_ma9ubneDhVSsS-jcA@mail.gmail.com>
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On 03/13/2017 01:03 PM, Navdeep Parhar wrote: > On Sun, Mar 12, 2017 at 5:35 PM, John Jasen <jjasen@gmail.com> wrote: >> UDP traffic. dmesg reports 16 txq, 8 rxq -- which is the default for >> Chelsio. >> > I don't recall offhand, but UDP might be using 2-tuple hashing by > default and that might affect the distribution of flows across queues. > Are there senders generating IP fragments by any chance (that'll > depend on the "send size" that your UDP application is using)? No, they're not fragmenting. > Have you tried limiting the adapter's rx ithreads to the CPU that the > PCIe slot with the adapter is wired to? Above and beyond the use of cpuset, you mean?
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