Date: Fri, 17 Mar 2017 13:08:14 +0300 From: Slawa Olhovchenkov <slw@zxy.spb.ru> To: John Jasen <jjasen@gmail.com> Cc: Navdeep Parhar <nparhar@gmail.com>, "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: <20170317100814.GN70430@zxy.spb.ru> In-Reply-To: <CAACLuR29xQhDWATRheBaOU2vtiYp61JgDKHaXum%2BU32MBDLBzw@mail.gmail.com> References: <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> <173fffac-7ae2-786a-66c0-e9cd7ab78f44@gmail.com> <CAPFoGT-BAMpj34wtB06dxMKk%2B87OEOs5-qu%2BRLVz=aPrhX6hDA@mail.gmail.com> <CAACLuR29xQhDWATRheBaOU2vtiYp61JgDKHaXum%2BU32MBDLBzw@mail.gmail.com>
next in thread | previous in thread | raw e-mail | index | archive | help
On Thu, Mar 16, 2017 at 03:50:42PM -0400, John Jasen wrote: > As a few points of note, partial resolution, and curiosity: > > Following down leads that 11-STABLE had tryforward improvements over > 11-RELENG, I upgraded. The same tests (24 client streams over UDP with > small packets), the system went from passing 1.7m pps to about 2.5m. > > Following indications from Navdeep Parhar that UDP queue hashing is not as > efficient as it could be, we started running the tests with various powers > of 2 streams (2,4,8,16,32) -- and were able to push the system up to 5m pps. > > We are currently seeing in the tests approximately 10-11m pps on the > outside interface, around 5-6m dropped, and 5 million passed. You want more? > On Mon, Mar 13, 2017 at 1:31 PM, Navdeep Parhar <nparhar@gmail.com> wrote: > > > On Mon, Mar 13, 2017 at 10:13 AM, John Jasen <jjasen@gmail.com> wrote: > > > 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? > > > > I meant cpuset. > > > > If possible, try your experiments on a single socket system. > > > > Regards, > > Navdeep > >
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20170317100814.GN70430>