Re: [myrinet] Re:Re: Re:Re: Using multiple Myrinet in parallel?

Hi all,
The paper "Using Multirail Networks in High-Performance Clusters", to 
be presented in IEEE Cluster 2001, Newport Beach, CA, October 2001 
could be helpful.

http://www.c3.lanl.gov/~fabrizio/publications.html


Best wishes,

--
Salvador Coll
Departamento de Ingenieria Electronica
Universidad Politecnica de Valencia
Apartado 22012
46071 Valencia -- SPAIN                     e-mail: [email protected]

Computer & Computational Sciences Division
Modeling, Algorithms & Informatics (CCS-3)
MS B256, Los Alamos National Laboratory
Los Alamos, NM 87545 -- USA                 e-mail: [email protected]

> >On Wed, 29 Aug 2001, geoge_zhang wrote:
> >>   Our platform is a PC cluster connected with Myrinet. Each PC has 
four Intel
> >>XEON processors running LINUX with 66Bits/66MHZ PCI bus.
> >>  I'm not very sure about the characteristics of PCI buses, does 
our PC cluster
> >>platform has 2 or more primary PCI buses, which makes it possible 
to benifit from
> >>using multiple myrinet cards ? Any advice about our idea is 
appreciated.
> >
> >
> >Run
> >	/sbin/lspci -t
> >to see the "tree" of PCI slots.
> >
> >-[00]-+-00.0
> >      +-01.0-[01]----00.0
> >      +-07.0
> >      +-07.1
> >      +-07.2
> >      +-07.3
> >      +-07.4
> >      +-07.5
> >      \-0d.0
> >
> >This will help you to know whether you have multiple busses.
> >You probably have two busses, one that is 64/66 and another
> >"legacy" 5V 64bit/33MHz. What motherboard do you have?
> >
>   Thank you for you help. Actually, I'm not sure the motherboard of 
the PCs,
> but I'll check it and test it as you said.
>   As our large-scale parallel applications requires intensive 
communication,
> we'd like to improve the performance of GM further by using multiple 
networks.
> Since you've invested time in GM for supporting multiple cards in one 
node, 
> could you just emagine the performance results by using two myrinet 
networks.
> Of course, there is incurred overhead for balancing the multiple 
cards, but
> how much the overhead could be ?
> 
> 
> ___________________________________________IP¿¨¡¢ÉÏÍø¿¨Á½ÕÛÊ·Å«±È¡¢
À¯±ÊСÐÂÈ«¼Ò¸£»ªÓïÅÅÐаñ°ä½±µäÀñÌìÓ®³´¹É,ÌìÉúÎÒÓ®!
> 
> 
> 
> 
>