Re: [myrinet] Re: Low bandwidth

No better performances.
Moreover, gm_allsize is run in unidirectional mode. Performaces are also worse
in standard bidirectional mode.

On Tue, Jul 31, 2001 at 12:27:14PM +0200, Dominique Vançon wrote:
> Hi,
> Please verify that you have set the jumper on the board to 1280 OR that you
> set the parameter :
> gm_set_speed --speed 1280 in your GM binary directory (and after if needed
> in your rc.local for example).
> Sincerly,
> Dominique Vançon
> Alineos : intégration linux - stations, clusters et parallélisation
> Tel : 01 64 78 57 65
> Fax : 01 64 78 57 66
> [email protected]
> www.alineos.com
> ----- Original Message -----
> From: "Francesco Lovergine" <[email protected]>
> To: <[email protected]>
> Sent: Tuesday, July 31, 2001 10:57 AM
> Subject: [myrinet] Low bandwidth
> 
> 
> >
> > Hello folks
> >
> > I just built up my first beowulf cluster with the latest PCI64B-2
> > cards (PCI64C was available just a month later our order :-().
> > Hosts are all DEC Alphastation 500/500 (alcor arch). OS is Linux
> > with kernel 2.2.19. Buses are 32bits @ 33Mhz so my guess is at least
> > a 100-130MBs of throughput. In fact, reality is well different...
> > gm_allsize gives me a maximum bandwith of 56MBs.
> > Any hints?
> >
> > PS: This is a Debian GNU/Linux cluster, not the boring RH flavor...
> > hip, hip, hurrah for the Debian Project...
> >
> > --
> > Francesco P. Lovergine
> >
> >

-- 
Francesco P. Lovergine