Le 29/09/2020 à 15:19, Milian Wolff a écrit :
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
Sorry, I only meant : "more recent that what I have here".
OK I will try the AppImage, it's nice it exists one.
Loïc
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