Evgeniy Polyakov wrote:

On Thu, Jun 21, 2007 at 02:00:07PM -0700, Rick Jones (rick.jones2@hp.com) wrote:

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Simple test included test -> desktop and vice versa traffic with 128 and
4096 block size in netperf-2.4.3 setup.

Is that in conjunction with setting the test-specific -D to set
TCP_NODELAY, or was Nagle left-on?  If the latter, perhaps timing issues
could be why the confidence intervals weren't hit since the relative
batching of 128byte sends into larger segments is something of a race.

I used this parameters:
netperf -l 60 -H kano -t TCP_STREAM -i 10,2 -I 99,5 -- -m 128 -s 128K
-S 128K

You can take -i up to 30 for the max count if you want to try to hit the 
levels.

so without nodelay.

With nodelay I've gotten:
batch-128: 128.91 mbit/sec
mainline-128: 140.57 mbit/sec

which is about 5 times less than withouth nodelay (~760 mbit/s)
Although nodelay results look more realistic.

all that fun send batching that happens without nodelay :)

rick jones

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rick jones