Hi Tony, >> >> I would think that the size based sampling would create a size based bias in >> your sampling. > > > That’s actually true. And this could be good (if you’re interested in what’s > filling up your eden, the larger objects might be of more interest) or bad > (if you want to get a general idea of what’s being allocated, the size bias > might make you miss some types of objects / allocation sites). > >
IME, if I see allocation rates > ~500MB/sec I know there are some significant wins I can make by tuning allocation hotspots. So, I’m interested in frequent allocations no matter what the size. > >> Since IME, it’s allocation frequency is more damaging to performance, I’d >> prefer to see time boxed sampling > > > Do you mean “sample every X ms, say”? > > I don’t find that sampling rate has to be that high to find hot allocation sites. Kind regards, Kirk Pepperdine > > Tony > > > >> >> Kind regards, >> Kirk Pepperdine >> > > > ----- > > Tony Printezis | JVM/GC Engineer / VM Team | Twitter > > @TonyPrintezis > tprinte...@twitter.com
