On Sunday, September 02, 2012 10:41:15 pm Andy Young wrote: > I am tuning our server that has an Intel 82576 gigabit NIC using the igb > driver. I see a lot of posts on the net where people bump the > rx_processing_limit sysctl from the default value of 100 to 4096. Can > anyone tell me what this is intended to do?
If you have multiple devices sharing an IRQ with igb (and thus are not using MSI or MSI-X), it forces the driver to more-or-less cooperatively schedule with the other interrupts on the same IRQ. However, since igb uses a fast interrupt handler and a task on a dedicated taskqueue in the non-MSI case now, I think it doesn't even do that. It should probably be set to -1 (meaning unlimited) in just about all cases now. -- John Baldwin _______________________________________________ freebsd-hardware@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hardware To unsubscribe, send any mail to "freebsd-hardware-unsubscr...@freebsd.org"
