On Wed, 2007-11-14 at 10:15 -0500, Mike Tancsa wrote: > At 03:58 PM 10/31/2007, Mike Tancsa wrote: > >To: John Baldwin <jhb_at_freebsd.org>, freebsd-current_at_freebsd.org > >From: Mike Tancsa <mike_at_sentex.net> > >Subject: Re: em0: watchdog timeout ... > > > >At 04:21 PM 10/31/2007, John Baldwin wrote: > >> > > >> > em1_at_pci1:0:1: class=0x020000 card=0x115e8086 chip=0x105e8086 > >> > rev=0x06 hdr=0x00 > >> > vendor = 'Intel Corporation' > >> > device = 'PRO/1000 PT' > >> > class = network > >> > subclass = ethernet > >> > cap 01[c8] = powerspec 2 supports D0 D3 current D0 > >> > cap 05[d0] = MSI supports 1 message, 64 bit > >> > cap 10[e0] = PCI-Express 1 endpoint > >> > > >> > its also in FastE mode and not gigE. Not sure if that makes a > >> > difference or not. > >> > >>What if you use MSI? > > > >How do I enable that ? > > > > Just to follow up on this thread for the archives, enabling MSI does > indeed seem to stop, or at least mitigate watchdog timeouts. Its > been almost 2 weeks on this one box and we have had zero watchdog timeouts. I'm still getting these with MSI... em0_at_pci0:2:0:0: class=0x020000 card=0x02f61014 chip=0x108c8086 rev=0x03 hdr=0x00 vendor = 'Intel Corporation' device = '82573E Intel Corporation 82573E Gigabit Ethernet Controller (Copper)' class = network subclass = ethernet cap 01[c8] = powerspec 2 supports D0 D3 current D0 cap 05[d0] = MSI supports 1 message, 64 bit enabled with 1 message cap 10[e0] = PCI-Express 1 endpoint rnoland-ibm% vmstat -i interrupt total rate irq1: atkbd0 87456 0 irq4: sio0 2 0 irq6: fdc0 10 0 irq14: ata0 1896659 11 irq15: ata1 422846 2 irq16: uhci3 drm0 10788636 63 irq22: pcm0 15730204 92 irq23: uhci0 ehci0 258850 1 cpu0: timer 338437976 1999 irq256: em0 1363782 8 cpu1: timer 338430141 1999 Total 707416562 4180 FreeBSD rnoland-ibm.acs.internap.com 8.0-CURRENT FreeBSD 8.0-CURRENT #112: Tue Nov 6 14:11:24 EST 2007 root_at_rnoland-ibm.acs.internap.com:/usr/obj/usr/src/sys/IBM i386 em0: watchdog timeout -- resetting em0: link state changed to DOWN em0: link state changed to UP em0: watchdog timeout -- resetting em0: link state changed to DOWN em0: link state changed to UP It seems to occur when a new connection is being created, typically from some fairly heavyweight application. For example starting the acroread plugin in firefox to download a PDF. I haven't had time to try and investigate it thoroughly, so this is all anecdotal. But it is still occurring with MSI. robert. > > # vmstat -i > interrupt total rate > irq1: atkbd0 6 0 > irq4: sio0 59020 0 > irq17: em3 225204 0 > irq19: atapci1 243645 0 > cpu0: timer 1985129675 1997 > irq256: em0 1460563078 1470 > irq257: em1 2360550 2 > irq258: em2 1300707554 1309 > cpu1: timer 1985084642 1997 > Total 6734373374 6777 > > However, it *seems* to increase the amount of missed packets. But, > traffic patterns are a little higher, so I cant be certain. > > em0: Missed Packets = 5514 > em0: Receive No Buffers = 1950 > em0: RX overruns = 9 > em2: Missed Packets = 220073 > em2: Receive No Buffers = 29034 > em2: RX overruns = 1498 > > > ---Mike > > _______________________________________________ > freebsd-current_at_freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-current > To unsubscribe, send any mail to "freebsd-current-unsubscribe_at_freebsd.org"
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