RE: [myrinet] Re: Low bandwidth
"Tenhave, Tim" <[email protected]>
| Newsgroups | gmane.network.myrinet.general |
|---|---|
| Message-ID | <41AF46BC272637488363F0F14BCCF8202174B1@tayexc19.americas.cpqcorp.net> |
Hi, I would try moving the Myrinet board into other slots. I do not have access to an AS500 today, but I do know it contained 2 (or 3) PCI buses and you may be competing for resources from other devices in the bus you are on. You can help yourself determine the nature of your bus by using the SRM "show config | more" command and attempt to move your Myrinet board to a quieter bus. Realize the slot numbers provided are logical slots and not physical slots. If you need more details, send email. Tim Compaq/DEC Alpha guy who uses Myrinet too. On Tue, 31 Jul 2001, Francesco Lovergine wrote: > > 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... > > -- ________________________________________________________________ Clemens Adler phone: (631)344-8334 Bldg. 510A email: [email protected] Brookhaven National Lab Upton N.Y. 11973 Office: Bldg. 118 Rm. 103 ________________________________________________________________