14 ms·

Which is why the defaults for perf always drive me crazy. You want to see the entire call tree with the cumulative and exclusive time spent in all the functions

• saagarjha 1y ago
  I’m honestly curious why the defaults are the way they are. I have basically never found them to be what I want. Surely the perf people aren’t doing something completely different than I am?
  • Sesse__ 1y ago
    I almost never find graph usage useful, TBH (and flamegraphs are worse than useless). And perf's support for stack traces is always wonky _somehow_, so it's not easy to find good defaults for the cases where I need them (I tend to switch between fp, lbr and dwarf depending on a whole lot of factors).
    • YZF 1y ago
      Tell me about it! I think I've only been able to get good call stacks when I build everything myself with the right compilation options. This is a big contrast with what I remember working with similar tools under MSFT environments (MS Profiler or vTune). You can get it to work though but it's a pain.
    • saagarjha 1y ago
      To be honest I don't like Linux profiling tools at all. Clearly the people working on them have a very different set of problems than I do
  • YZF 1y ago
    I think it boils down to what Brendan Gregg likes. He must be doing somewhat different type of work and so he likes these defaults.