On Thu, Nov 24, 2005 at 12:40:24PM +1100, Michael Vince wrote: > chipset in all their servers. > Luckily I haven't not seen the problem on any of my Dell servers (as > long as I am looking at this right). > > This server has been running for a long time. > vmstat -i > interrupt total rate > irq1: atkbd0 6 0 > irq4: sio0 23433 0 > irq6: fdc0 10 0 > irq8: rtc 2631238611 128 > irq13: npx0 1 0 > irq14: ata0 99 0 The interrupt storm only happens when other interrupts are delivered to other devices, e.g. when you're doing a lot of filesystem I/O. > irq16: uhci0 1507608958 73 > irq64: em0 1513106157 73 Both of these look like they might be experiencing it, since they have extremely high counts. Your USB controller shouldn't have that many interrupts, for example. > 1000 simultaneous tcp connections under a load of 35. Both seem OK. > vmstat -i > interrupt total rate > irq4: sio0 315 0 > irq13: npx0 1 0 > irq14: ata0 47 0 > irq16: uhci0 2894669 2 > irq64: em0 2890414 2 Again uhci seems to have a lot of interrupts. Kris
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