My issue turns out to be hardware specific too.
The two Broadcom 5714 onboard NICs on my Niagara t1000 give bad packet
receive performance for some reason, the other two which are Broadcom
5704's are perfectly fine. I'll figure out what the problem is,
probably some misprogramed register in either the chip or the bridge
it's behind.
The UDP stream test of netperf is great for isolating TCP/TSO vs.
hardware issues. If you can't saturate the pipe or the cpu with
the UDP stream test, it's likely a hardware issue.
The cpu utilization and service demand numbers provided, on both
send and receive, are really useful for diagnosing problems like
this.
Rick deserves several beers for his work on this cool toy. :)
-
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html