Hi Evgeniy,
Evgeniy Polyakov <[EMAIL PROTECTED]> wrote on 07/20/2007 06:24:23 PM:
> Hi Krishna.
>
> On Fri, Jul 20, 2007 at 12:01:49PM +0530, Krishna Kumar
([EMAIL PROTECTED]) wrote:
> > After fine-tuning qdisc and other changes, I modified IPoIB to use this
API,
> > and now get good gains. Summary for TCP & No Delay: 1 process improves
for
> > all cases from 1.4% to 49.5%; 4 process has almost identical
improvements
> > from -1.7% to 59.1%; 16 process case also improves in the range of
-1.2% to
> > 33.4%; while 64 process doesn't have much improvement (-3.3% to 12.4%).
UDP
> > 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.
The TCP RR results show a slight impact, however the service demand shows
good improvement. The results are (I did TCP RR - 1 process, 1,8,32,128,512
buffer sizes; and UDP RR - 1 process, 1 byte buffer size) :
Results for TCR RR (1 process) ORG code:
Size R-R CPU% S.Demand
------------------------------------------------------------
1 521346.02 5.48 1346.145
8 129463.14 6.74 418.370
32 128899.73 7.51 467.106
128 127230.15 5.42 340.876
512 119605.68 6.48 435.650
Results for TCR RR (1 process) NEW code (and change%):
Size R-R CPU% S.Demand
--------------------------------------------------------------------
1 516596.62 (-0.91%) 5.74 1423.819 (5.77%)
8 129184.46 (-.22%) 5.43 336.747 (-19.51%)
32 128238.35 (-.51%) 5.43 339.213 (-27.38%)
128 126545.79 (-.54%) 5.36 339.188 (-0.50%)
512 119297.49 (-.26%) 5.16 346.185 (-20.54%)
Results for UDP RR 1 process ORG & NEW code:
Code Size R-R CPU% S.Demand
----------------------------------------------------------------------
ORG 1 539327.86 5.68 1348.985
NEW 1 540669.33 (0.25%) 6.05 1434.180 (6.32%)
> I will review code later this week (likely tomorrow) and if there will
> be some issues return back.
Thanks! I had just submitted Rev2 on Sunday, please let me know what you
find.
Regards,
- KK
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