Re: [myrinet] RE: RE: Re: Low bandwidth

Thank you, we will do this asap. When done I`ll send an update to this list.

On Wed, Aug 01, 2001 at 12:40:55PM -0400, Tenhave, Tim wrote:
> Hi,
> 
> I would try to move the Myrinet card to slot 7 - the top slot (hopefully 64
> bit in your system) and see if anything improves.  I do know the bottom 2
> slots will possibly suffer issues with interrupts and overall throughput
> since they "share" resources.  
> 
> I also did some digging into what is left of the old Digital internal
> "notes" areas and confirmed the PCI performance best seen was 111MB/sec DMA
> read, and 65MB/sec DMA write.  This was in a 32 bit slot.  I did not find
> any data for the 64 bit slot that appeared as the top slot in the later
> AS500-400 and -500 machines.
> 
> Tim  
> 
> 
> 
> -----Original Message-----
> From: Francesco Lovergine [mailto:f.lovergine <at> iesi.ba.cnr.it]
> Sent: Wednesday, August 01, 2001 3:56 AM
> To: Tenhave, Tim
> Cc: Francesco Lovergine; myrinet <at> osc.edu
> Subject: Re: [myrinet] RE: Re: Low bandwidth
> 
> 
> On Tue, Jul 31, 2001 at 12:51:14PM -0400, Tenhave, Tim wrote:
> > 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.
> >   
> 
> this is the show config output:
> 
> 
> 
> PCI Bus
>      Bus 00  Slot 06: DECchip 21040 Network Controller
>                                    ewa0.0.0.6.0
> 00-00-F8-22-F9-E2
>  
>      Bus 00  Slot 07: Cateyes - 4D40T
>      Bus 00  Slot 08: DE500-BA Network Controller
>                                    ewb0.0.0.8.0
> 00-00-F8-10-C9-63
>  
>      Bus 00  Slot 09: ISP1020 Scsi Controller
>                                    pka0.7.0.9.0          SCSI Bus ID 7
>                                    dka0.0.0.9.0           RZ29B
>                                    dka400.4.0.9.0         RRD45
>  
>      Bus 00  Slot 10: Intel   8275EB PCI to Eisa Bridge
>  
>  
>      Bus 00  Slot 11: Vendor: 14c1  Device: 8043
>      Bus 00  Slot 12: Cateyes - VGA Daughter Card
> 
> 
> 
> I could remove the powerstorm graphic card (slots 7/12).
> Currently only slot8 is used as fastethernet controller.
> Any hints?
> 
> 

--

-- 
Francesco P. Lovergine