Only one device support by em does multiqueue right now, and that is Hartwell, 82574.
Jack On Thu, Apr 8, 2010 at 2:05 PM, Mike Tancsa <m...@sentex.net> wrote: > At 04:56 PM 4/8/2010, Pyun YongHyeon wrote: > >> On Thu, Apr 08, 2010 at 02:31:18PM -0400, Mike Tancsa wrote: >> > At 02:17 PM 4/8/2010, Pyun YongHyeon wrote: >> > >> > >Try this patch. It should fix the issue. It seems Jack forgot to >> > >strip CRC bytes as old em(4) didn't strip it, probably to >> > >workaround silicon bug of old em(4) controllers. >> > >> > Thanks! The attached patch does indeed fix the dhclient issue. >> > >> > >> > >It seems there are also TX issues here. The system load is too high >> > >and sometimes system is not responsive while TX is in progress. >> > >Because I initiated TCP bulk transfers, TSO should reduce CPU load >> > >a lot but it didn't so I guess it could also be related watchdog >> > >timeouts you've seen. I'll see what can be done. >> > >> > Thanks for looking into that as well!! >> > >> > ---Mike >> > >> >> Mike, >> >> Here is patch I'm working on. This patch fixes high system load and >> system is very responsive as before. But it seems there is still >> some TX issue here. Bulk UDP performance is very poor(< 700Mbps) >> and I have no idea what caused this at this moment. >> >> BTW, I have trouble to reproduce watchdog timeouts. I'm not sure >> whether latest fix from Jack cured it. By chance does your >> controller support multi TX/RX queues? You can check whether em(4) >> uses multi-queues with "vmstat -i". If em(4) use multi-queue you >> may have multiple irq output for em0. >> > > Hi, > I will give it a try later tonight! This one does not seem to. > > 0(ich10)# vmstat -i > interrupt total rate > irq16: uhci0+ 30 0 > irq18: ehci0 uhci5 158419 17 > irq19: fwohci0++ 86 0 > irq21: uhci1 17 0 > irq23: uhci3 ehci1 2 0 > cpu0: timer 18570305 1994 > irq256: igb0 80 0 > irq257: igb0 255 0 > irq258: igb0 66 0 > irq259: igb0 32 0 > irq260: igb0 2 0 > irq261: igb1 2679 0 > irq262: igb1 998 0 > irq263: igb1 2468 0 > irq264: igb1 6361 0 > irq265: igb1 2 0 > irq266: em0 33910 3 > irq267: ahci1 15317 1 > cpu1: timer 18557074 1993 > cpu3: timer 18557168 1993 > cpu2: timer 18557108 1993 > Total 74462379 7998 > 0(ich10)# > > > > > > > > -------------------------------------------------------------------- > Mike Tancsa, tel +1 519 651 3400 > Sentex Communications, m...@sentex.net > Providing Internet since 1994 www.sentex.net > Cambridge, Ontario Canada www.sentex.net/mike > > _______________________________________________ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "freebsd-stable-unsubscr...@freebsd.org"
