I will give it a try and let folks know the results - unless told
otherwise, I will ass-u-me I only need rerun the "full_iptables" test
case.
The runemomniagg2.sh script is still running, but the initial cycles
profile suggests that the main change is converting the write_lock time
into spinlock contention time with 78.39% of the cycles spent in
ia64_spinlock_contention. When the script completes I'll upload the
profiles and the netperf results to the same base URL as in the basenote
under "contrack01/"
The script completed - although at some point I hit an fd limit - I think I have
an fd leak in netperf somewhere :( .
Anyhow, there are still some netperfs that end-up kicking the bucket during the
run - I suspect starvation because where in the other configs (no iptables, and
empty iptables) each netperf seems to consume about 50% of a CPU - stands to
reason - 64 netperfs, 32 cores - in the "full" case I see many netperfs consuming
100% of a CPU. My gut is thinking that one or more netperf contexts gets stuck
doing something on behalf of others. There is also ksoftirqd time for a few of
those processes.
Anyhow, the spread on trans/s/netperf is now 600 to 500 or 6000, which does
represent an improvement.
rick jones
PS - just to be certain that running-out of fd's didn't skew the results I'm
rerunning the script with ulimit -n 10240 and will see if that changes the
results any. And I suppose I need to go fd leak hunting in netperf omni code :(
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