hi, yeah, I'd like you to do some further testing with NUMA. Are you able to run freebsd-11 or -HEAD on these boxes?
-adrian On 8 August 2016 at 07:01, Ben RUBSON <ben.rub...@gmail.com> wrote: > >> On 04 Aug 2016, at 11:40, Ben RUBSON <ben.rub...@gmail.com> wrote: >> >> >>> On 02 Aug 2016, at 22:11, Ben RUBSON <ben.rub...@gmail.com> wrote: >>> >>>> On 02 Aug 2016, at 21:35, Hans Petter Selasky <h...@selasky.org> wrote: >>>> >>>> The CX-3 driver doesn't bind the worker threads to specific CPU cores by >>>> default, so if your CPU has more than one so-called numa, you'll end up >>>> that the bottle-neck is the high-speed link between the CPU cores and not >>>> the card. A quick and dirty workaround is to "cpuset" iperf and the >>>> interrupt and taskqueue threads to specific CPU cores. >>> >>> My CPUs : 2x E5-2620v3 with DDR4@1866. >> >> OK, so I cpuset all Mellanox interrupts to one NUMA, as well as the iPerf >> processes, and I'm able to reach max bandwidth. >> Choosing the wrong NUMA (or both, or one for interrupts, the other one for >> iPerf, etc...) totally kills throughput. >> >> However, full-duplex throughput is still limited, I can't manage to reach >> 2x40Gb/s, throttle is at about 45Gb/s. >> I tried many different cpuset layouts, but I never went above 45Gb/s. >> (Linux allowed me to reach 2x40Gb/s so hardware is not a bottleneck) > > OK, I then found a workaround. > > In the motherboards' BIOS, I disabled the following option : > Advanced / ACPI Settings / NUMA > > And I'm now able to go up to 2x40Gb/s ! > I'm then even able to achieve this throughput without any cpuset ! > > Strange that Linux was able to deal with this setting, but I'm pretty sure > production performance will be easier to maintain with only 1 NUMA. > > Feel free to ask me if you want further testing with 2 NUMA. > > Ben > > _______________________________________________ > freebsd-net@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-net > To unsubscribe, send any mail to "freebsd-net-unsubscr...@freebsd.org" _______________________________________________ freebsd-net@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to "freebsd-net-unsubscr...@freebsd.org"
