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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<lijunlong> fech: have create an issue on bugzilla: https://sourceware.org/bugzilla/show_bug.cgi?id=27881
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<agentzh> serhei: cycles are very helpful too.
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<fche> cycle counts are available via getmsr if nothing else, but also clock_gettime(CLOCK_MONOTONIC_RAW) might do
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<agentzh> fche: not sure if that's exposed to the ebpf world.
<agentzh> the ebpf helpers are very limited...
<agentzh> alas.
<agentzh> missing a lot of things.
<fche> ah yes. well there are some clocks
<fche> (had bpf/dyninst confused that moment)
<agentzh> heh
<agentzh> yeah, there's time, not cycles.
<agentzh> like ns time.
<agentzh> dyninst's 100% CPU startup hit reminds me of the stock ebpf verifier :)
<agentzh> both eat a lot of CPU cycles upon startup.
<agentzh> for nontrivial things, of course.
<agentzh> seems like the bpf_probe_read_str() ebpf helper and etc enforce dst buffers on the bpf stack.
<agentzh> no joy...
<agentzh> one more reason to kill the ebpf verifier ;)
<fche> never going to give that up
<agentzh> considering how small the bpf stack limit is.
<fche> never going to let you down
<fche> never going to desert you
<agentzh> lol
* agentzh is talking to a bot named fche?
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