[Bioclusters] gigabit ethernet performance

[Chris Iacovella]

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This sounds familiar....we were getting really bad network performance 
on one of our opteron based clusters over the force10 gigabit switch.  
I think the technical people ended up pinpointing the problem to the 
driver for the Broadcom chip that was powering the NIC.  I think the 
xserves use the same (or similar) broadcom chipset for the gigabit 
ethernet (at least the G5 Xserves do).   I don't have any G4 Xserves to 
test with, but I will be over the next few days doing some tests on the 
G5 Xserves we've just installed to see if this is a problem.

You might want to investigate this aspect.

Chris Iacovella
cri@umich.edu


On Jul 10, 2004, at 4:24 AM, Chen Peng wrote:

> Hi all,
>
> One article on gigabit ethernet performance is from macslash. It looks 
> there is some undocuemented problem on Mac's gigabit network.
>
> http://macslash.org/article.pl?sid=02/03/07/2110255&mode=thread
>
>
> --
> Chen Peng <chenpeng@tll.org.sg>
> Senior System Engineer
> Temasek Life Sciences Laboratory
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This sounds familiar....we were getting really bad network performance
on one of our opteron based clusters over the force10 gigabit switch. 
I think the technical people ended up pinpointing the problem to the
driver for the Broadcom chip that was powering the NIC.  I think the
xserves use the same (or similar) broadcom chipset for the gigabit
ethernet (at least the G5 Xserves do).   I don't have any G4 Xserves
to test with, but I will be over the next few days doing some tests on
the G5 Xserves we've just installed to see if this is a problem.  


You might want to investigate this aspect.


Chris Iacovella

cri@umich.edu



On Jul 10, 2004, at 4:24 AM, Chen Peng wrote:


<excerpt>Hi all,


One article on gigabit ethernet performance is from macslash. It looks
there is some undocuemented problem on Mac's gigabit network.


http://macslash.org/article.pl?sid=02/03/07/2110255&mode=thread



<fixed>--

Chen Peng <<chenpeng@tll.org.sg> 

Senior System Engineer

Temasek Life Sciences Laboratory</fixed></excerpt>
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