On Dienstag, 29. September 2020 12:19:24 CEST LEPAREUR Loic wrote: > Le 21/09/2020 à 17:04, Milian Wolff a écrit : > > On Donnerstag, 17. September 2020 15:32:04 CEST John Reiser wrote: > >> On 2020-09-17 LEPAREUR Loic wrote: > >>> Several years ago, I developed a Massif patch to let the client code > >>> select which part of the code should be profiled with Massif. > >> > >> Today this is much less interesting unless you compare and contrast with > >> https://github.com/KDE/heaptrack . Do a web search for "heaptrack vs > >> massif". Consider particularly "A Faster Massif" in > >> https://milianw.de/tag/heaptrack , and > >> https://milianw.de/tag/massif-visualizer . > > > > In other news: I just pushed a bunch of patches to heaptrack git which > > allow you to do time-diffing. I.e. you can now select a time range in the > > charts and then request filtering to show the delta costs between the two > > time points. > > > > This should allow you to solve your problem nicely. > > > > Alternatively, you can also runtime-attach heaptrack after you finished > > your initialization phase to only record the main computational loop. The > > overhead should be minimal or actually close to zero when your main loop > > isn't allocating anything. > > > > Cheers > > OK, thanks for pointing that out. I didn't know about it, I will give it > a try. > > Heaptrack requires recent versions of KChart and Qt for the GUI and it > isn't easy to upgrade them here.
What do you mean by "recent" - to my knowledge it can build with some-years- old versions of both ;-) But even then, you can just download the AppImage and don't need to install anything then: https://download.kde.org/stable/heaptrack/1.2.0/ > And since you LD_PRELOAD Heaptrack, it > would be very easy to add client requests mechanism, but I will try > vanilla version first. Yes, there's already `heaptrack_api.h`, which could be expanded to add support for client markers or similar. Cheers -- Milian Wolff m...@milianw.de http://milianw.de
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