Re: [BProc] performance issues with Myrinet : latency

[Maurice H. <ma...@ha...>]

Florent Calvayrac wrote:

>This is probably a well know issue but since we have installed
>Clustermatic  (one version away) the latency of our Myrinet network
>has gone way up, from 3-8 microseconds to about 100
>for any type of MPI call. I am sure not to have
>installed the TCP/IP version (since only two
>jobs per card seem to be running at the same time at maximum)
>and I suspect the problem comes from dynamic routing.
>
>I tried to download and compile the router given on the clustermatic
>home page but fail because of a missing "gm_undocumented_calls.h"
>and other errors.
>  
>

I suggest you should try running "MX"" drivers rather than the older gmpich

--

With our best regards,

Maurice W. Hilarius
Hard Data Ltd