3x100Mbps: summary

beowulf at seinfeld.engr.ucf.edu beowulf at seinfeld.engr.ucf.edu
Thu Oct 12 12:47:25 EDT 2000



On Wed, 11 Oct 2000, Douglas Eadline wrote:

> On Wed, 11 Oct 2000 beowulf at seinfeld.engr.ucf.edu wrote:
> 
> 
> --snip--
> > 
> > We have 16 compute nodes and one server/frontend.
> > 
> > Our setup is:
> >   Motherboard:	SuperMicro P6DGE Intel BX
> >   Processor(s):	Dual PII-350
> >   Memory:	256MB PC100
> >   HardDrive:	FUJITSU 8GB
> >   Ethernet:	3 x Kingston KNE100TX (tulip)
> >   OS:		RedHat 6.1
> >   Kernel:	2.2.17
> > 
> > Does anyone know why the 3 channel network would perform worse then the 2
> > channel network?  The only real differences between our setups is that we
> > use SMP nodes, but you have faster processors.  I know that running in SMP
> > under linux causes the network latency to increase, but could it be the
> > cause of our 3 channel network problems?
> 
> The one thing you did not report was your switch setup.
> This can have an effect.

Sorry about that.  We have 3 Linksys DSSX24 24 port switchs.  I was
thinking that since we have seperate switchs for each channel and that 2
channels work great, 3 channels should not be any different when
considering the switches.

Judd Tracy
jtr at isl.engr.ucf.edu


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