[Beowulf] SCI Socket latency: 2.27 microseconds

Bogdan Costescu bogdan.costescu at iwr.uni-heidelberg.de
Mon Mar 1 10:49:39 EST 2004


On Mon, 1 Mar 2004, Petter Gustad wrote:

> Dolphin has benchmarked a completed one byte socket send/socket
> receive latency at 2.27 microseconds,

Is this in polling mode or interrupt-driven ? I'm interested to see if 
I can do something useful (like computation) _and_ get such low 
latency.

> Benchmarks using Netperf also show more than 255 MBytes (2,035
> Megabits/s) sustained throughput using standard TCP STREAM sockets.

What is the CPU usage for this throughput ?

-- 
Bogdan Costescu

IWR - Interdisziplinaeres Zentrum fuer Wissenschaftliches Rechnen
Universitaet Heidelberg, INF 368, D-69120 Heidelberg, GERMANY
Telephone: +49 6221 54 8869, Telefax: +49 6221 54 8868
E-mail: Bogdan.Costescu at IWR.Uni-Heidelberg.De

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