[resend] Sunay Tripathi wrote: > Guys, > > We have a basic implementation in place for this work > http://www.opensolaris.org/os/project/crossbow/Design_softringset.txt > > Basically the idea is to keep the data paths very tight, always do > Dynamic polling when possible (independent of the workloads) while > utilizing more than 1 CPU for parallelizing the work load. As part of > this work, I am trying to see what can be done for small packet > forwarding performance and also latency (btw there are two projects > coming online soon to specifically target forwarding and latrency). > > So if people have needs/suggestions/stakes in this area, I would > recommend reading the above document and dive in. As for how to > test some of these things, you can use 'ttcp' > (http://sd.wareonearth.com/~phil/net/ttcp/) on a back to back > setup for starters (10Gb NICs might be better). Use the '-D' option > with small write (64 bytes) to disable nagle and actually send > small packets on the wire. > > What I typically use > server: ./ttcp -s -r -v -u -b 262144 -l 64 -n 500000 > client: ./ttcp -D -s -v -u -t <hostname> -b 262144 -l 64 -n 500000 > > This is with UDP and if you snoop the wire, you will see the small > packets going by. > > Cheers, > Sunay >
-- Sunay Tripathi Distinguished Engineer Solaris Core Operating System Sun MicroSystems Inc. Solaris Networking: http://www.opensolaris.org/os/community/networking Project Crossbow: http://www.opensolaris.org/os/project/crossbow
