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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<lzap>
2760 is the top method, can I assume these are miliseconds ?
<fche>
that syntax is a bit funky - the best we could think of at the time - and the stap.1 man page doesn't spell out an example
<fche>
those numbers are in whatever units you stored in it ... delta microseconds I guess
<lzap>
yeah I find hard to learn the syntax, basically doing trial and error here
<fche>
if you can think of some way for stap to give better messages or advice, please tell us
<lzap>
I think its fine, I wrote several articles about Ruby "peeking" ^^^ I just love this way, Ruby performance (built-in) tools are not great this beats it by order of magnitude
<fche>
I think of stap as a tool-building tool, for better or for worse
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<lzap>
exactly, I wrote a tool that attaches to our Rails application and dumps some statistics about memory, method calls etc : https://github.com/lzap/foreman-tracer
<lzap>
so users can easily send us reports when they see perf regressions
<lzap>
it's a hacky I could do much better I guess but it works :-)
<lzap>
memory is always a thing in Ruby and other GC runtimes :D
<fche>
yup
<fche>
one can forget all about them ... until something goes wrong
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<lzap>
thanks a lot, thats a good starter, I can now fine tune this or do more clever time measuring!
<fche>
enjoy
<fche>
and let us know of neat results you get
<fche>
or annoying problems
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