Advice on a multithreaded netisr patch?
rwatson at FreeBSD.org
Sun Apr 5 06:24:02 PDT 2009
On Sun, 5 Apr 2009, Ivan Voras wrote:
> I thought this has something to deal with NIC moderation (em) but can't
> really explain it. The bad performance part (not the jump) is also visible
> over the loopback interface.
FYI, if you want high performance, you really want a card supporting multiple
input queues -- igb, cxgb, mxge, etc. if_em-only cards are fundamentally less
scalable in an SMP environment because they require input or output to occur
only from one CPU at a time.
Robert N M Watson
University of Cambridge
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