pshpstuningguidew p040105.doc Page 30
5.16 AIX 5L trace for daemon activity If you suspect that a system daemon is causing a performance problem on your system, run
AIX 5L trace t o check for da e m o n activity. F or example, t o find out whic h daemons ar e taking
up CPU time, use the following process:
trace -j 001,002,106,200,10c,134,139,465 -a -o /tmp/trace.aux -L 40000000 -T 20000000
sleep XX (XX is the time for your trace)
trcstop
trcrpt -O 'cpuid=on exec=on pid=on tid=on' /tmp/trace.aux > /tmp/trace.out
Look at /tmp/trace.out
pprof XX (XX is the time for your trace)
Look at:
pprof.cpu
pprof.famcpu
pprof.fami nd
pprof.flow
pprof.namecpu
pprof.start
pprof.cpu
You will find all these files on the $PWD at the time you run it.
tpr of -c -A all -x sleep XX (XX is the time for your trace)
Look at: sleep.prof (you will find this file on the $PWD at the time you run it)
Peak performance of HPS systems depends on properly tuning the HPS, and on correctly setting
applicatio n s hell varia b les and AIX 5L t unables.
Because there are many sources of performance data, correct tuning takes time. As has been
demonstrated, the HPS performs very well. If tuning is needed, there are several good tools to use
to determine p erformanc e p r oblems.
This section lists documents that contain additional information about the topics in this white
paper.
7.1 HPS documentation pSeries High Performance Switch - Planning, Installation and Service, GA22-7951-02