On 06/27/2012 04:58 PM, Garrett D'Amore wrote: > Mostly receive, or mostly transmit, traffic? echo ::interrupts | mdb -k (to > see interrupt bindings)
One more thing that might be a hint as to what's going on: when I'm looking at Brendan Gregg's nicstat, I can see igb3 reporting a high Sat(uration) value - in the range of 10-40 when nothing much is happening in the system and over 100 if e.g. zfs is clearing the ARC (which causes a rather heavy xcall load on one core, which I originally thought was the main problem, but later was shown to only be a factor contributing to my dropped packets). I have a few other machines (with bnx and e1000g NICs) which have Sat sitting constantly at 0.00 - not sure if that's what it *should* be, but certainly reading Brendan's comments in the nicstat utility on the meaning of Sat doesn't give confidence that anything above 0 is very good: # - Saturation is determined by counting read and write errors caused by the # interface running at saturation. This approach is not ideal, and the value # reported is often lower than it should be (eg, 0.0). Reading the rKB/s and # wKB/s fields may be more useful. -- Saso ------------------------------------------- illumos-discuss Archives: https://www.listbox.com/member/archive/182180/=now RSS Feed: https://www.listbox.com/member/archive/rss/182180/21175430-2e6923be Modify Your Subscription: https://www.listbox.com/member/?member_id=21175430&id_secret=21175430-6a77cda4 Powered by Listbox: http://www.listbox.com
