fche changed the topic of #systemtap to: http://sourceware.org/systemtap; email systemtap@sourceware.org if answers here not timely, conversations may be logged
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<lkthomas_>
folks, I am testing scheudler.ctxswitch, but how could I sort out the most hit pid ?
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<fche>
lkthomas_, hi
<fche>
hm, could try popular[next_pid] <<< 1
<fche>
then in the reporting loop
<fche>
global popular probe scheduler.ctxswitch { popular[next_pid] <<< 1 } probe timer.s(10) { foreach (p in popular- limit 5 ) { println(p, " ", @count(popular[p])) } }
<fche>
^^^ that's a complete working one
<fche>
the reporting loop (the timer.s probe) lists the top 5 pids seen (cumulatively since startup)
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<kerneltoast>
hi fche. i was looking into the utrace flag algebra, and there is just one inconsistency
<kerneltoast>
specifically in finish_report_reset:
<kerneltoast>
if (utrace_reset(task, utrace))
<kerneltoast>
report->action = UTRACE_RESUME;
<kerneltoast>
in this case, the report->action is just overwritten. is that intentional?
<kerneltoast>
elsewhere, we have this:
<kerneltoast>
if (action < report->action)
<kerneltoast>
report->action = action;
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<fche>
I'm not sure.
<fche>
Again I'd look at the original code / docs.
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