[Beowulf] Re: new release of GAMMA and MPI/GAMMA
ciaccio at disi.unige.it
Tue Aug 8 09:29:32 PDT 2006
On Thu, 3 Aug 2006, Giuseppe Ciaccio wrote:
> this is to inform you that a new release of the Genoa Active Message
> MAchine (GAMMA) is available for download at the site
> Compared to the Intel PRO/1000, the back-to-back
> latency of ``Tigon 3'' seems quite disappointingly high (~21 usec, to
> be compared with the 6 usec achieved by the Intel PRO/1000).
Update. At least part of the relatively high latency was due to Rx
coalescing/mitigation being active. After disabling this, the latency
dropped to 14.6 usec back-to-back at user level.
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