[ofa-general] Re: [PATCH 00/10] Implement batching skb API

Hi Evgeniy,

Evgeniy Polyakov [off-list ref] wrote on 07/20/2007 06:24:23 PM:

quoted

After fine-tuning qdisc and other changes, I modified IPoIB to use this

API,

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and now get good gains. Summary for TCP & No Delay: 1 process improves

for

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all cases from 1.4% to 49.5%; 4 process has almost identical

improvements

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from -1.7% to 59.1%; 16 process case also improves in the range of

-1.2% to

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33.4%; while 64 process doesn't have much improvement (-3.3% to 12.4%).

UDP

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was tested with 1 process netperf with small increase in BW but big
improvement in Service Demand. Netperf latency tests show small drop in
transaction rate (results in separate attachment).

What about round-robin tcp time and latency test? In theory such batching
mode should not change that timings, but practice can show new aspects.
I will review code later this week (likely tomorrow) and if there will
be some issues return back.

I had run RR test quite some time back and don't have the result at this
time,
other than remembering it was almost the same as the original. As I am
running
some tests on those systems at this time, I can send the results of RR
tomorrow.

Thanks,

- KK