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  Memory profiling with java and native libraries  (Read 785 times)
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Offline boxsmith
« Posted 2018-10-20 16:46:05 »

I have a Java application that uses LWJGL and a couple of my own native libraries. I've been able to do some memory profiling with Java Mission Control, CodeXL (for OpenGL) and LWJGL's memReport(), but this doesn't give me the complete picture, and there's about 100 MiB for which I can't account. I'd like a clear idea of what's going on outside of the Java heap.

How do you guys profile your games' memory usage? What tools have you found to work well (particularly on Windows)?
Offline cygnus
« Reply #1 - Posted 2018-10-20 18:10:42 »

JVisualVM is free and works well!
Offline boxsmith
« Reply #2 - Posted 2018-10-20 19:04:22 »

JVisualVM is free and works well!

VisualVM is nice, though in my experience inferior to jmc. The flight recorder seems to give much better information with a fraction of the overhead of VisualVM. (But anyway, neither will tell you about what's going on outside the Java heap, afaik.)
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Offline gouessej
« Reply #3 - Posted 2018-10-21 17:33:00 »

(But anyway, neither will tell you about what's going on outside the Java heap, afaik.)
There's a plugin for JVisualVM to examine the native heap but I don't remember where it is :s

You can use -XX:NativeMemoryTracking with Java 1.8 too.

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Offline cylab

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« Reply #4 - Posted 2018-10-23 09:42:30 »

In my dayjob I used jemalloc in the past: http://www.evanjones.ca/java-native-leak-bug.html

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Offline Zemlaynin
« Reply #5 - Posted 2018-10-26 05:55:08 »

I use RenderDoc to track GPU performance.
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