[Beowulf] typical latencies for gigabit ethernet
rpnabar at gmail.com
Mon Jun 29 17:24:48 EDT 2009
On Mon, Jun 29, 2009 at 3:15 PM, Mark Hahn<hahn at mcmaster.ca> wrote:
Thanks for all the help Mark!
> well, ping is not _really_ a benchmark ;)
I thought so! :) Lazy person's first shot. Now I will try ethtool.
> but it does sound like you have interrupt coalescing enabled.
Any way to verify if I do?
> ping is also reporting round-trip,
Ah! So my "real" latencies are 140/2 = 70 microsecs. That doesn't
sound so terribly bad now.
> well, look at "ethtool -c" output and try with "ping -s 20".
Tried this. No improvement. Still round-trip-pings are in the 140
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