[Beowulf] Multidimensional FFTs

Joe Landman landman at scalableinformatics.com
Thu Mar 2 16:19:30 EST 2006


On Thu, 2 Mar 2006, Konstantin Kudin wrote:

> By the way, any idea why gigE on Opterons with Broadcom chokes so
> easily with different flavours of "alltoall" operation, such as if done

We have had all manner of problems with Broadcom NICs, usually performance 
related, sometimes buggy tg3, sometimes other surprises.  At this point, 
we typically recommend Intel based NICs whenever possible.  Even if this 
means adding a card.  Your context switch/interrupt load rates will thank 
you as your CPU is not pounded into the dirt (unlike the Broadcom NIC 
based machines).

> via "isend+irecv"? If functioning flawlessly, the scaling would have
> been not too bad, but there seem to be issues of some sort ...
>
> Konstantin
>
> __________________________________________________
> Do You Yahoo!?
> Tired of spam?  Yahoo! Mail has the best spam protection around
> http://mail.yahoo.com
> _______________________________________________
> Beowulf mailing list, Beowulf at beowulf.org
> To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf
>
_______________________________________________
Beowulf mailing list, Beowulf at beowulf.org
To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf



More information about the Beowulf mailing list