[Beowulf] 10Gb/s iperf test point (TCP) available ?

Scott Atchley atchley at myri.com
Fri Oct 15 07:01:50 EDT 2010

On Oct 14, 2010, at 10:37 PM, Christopher Samuel wrote:

> Apologies if this is off topic, but I'm trying to check
> what speeds the login nodes to our cluster and BlueGene
> can talk at and the only 10Gb/s iperf server I've been
> given access to so far (run by AARNET) showed me just
> under 1Gb/s.

Have you tried netperf? I have read that iperf calls gettimeofday() before and after each read/write which might mean you are measuring the BG syscall time more than network throughput time.

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