[Beowulf] pci-e netwokr adapters
hahn at physics.mcmaster.ca
Fri Mar 24 05:57:47 PST 2006
> Any one have success running gig-e through the pci-e bus?
why would you expect it to be different?
pci-e exists mainly to provide headroom (ie, 16x), as well as some
improvements to configurability (vendors can balance lanes per slot).
for low-latency NICs, pci-e shaves off some time, but that's not
relevant for ethernet.
> Would cpu load be reduced greatly by using these rather than the onboard broadcom gig-e?
I'd be pretty surprised - nics have been busmastering for quite a while.
do you find the CPU load is great with broadcom nics?
> so far I've only see 1x pci-e gig-e, anything higher say 4x pci-e at a reasonable price?
1x pci-e is full-duplex 250 MB/s, no? so what would be the point?
or do you mean a multi-port nic?
> viable option to older myrinet gear?
hardly. plain old myri 2G is still ~3 us...
regards, mark hahn.
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