[android-developers] How to analyze memory usage of an app

Hi,

I try to debug an application which has an out of memory error. The
app cannot allocate 3Mbytes in some condition. I analyze the adb log,
there are some debug output of dalvikvm as below:

dalvikvm: GC_FOR_MALLOC freed <1K, 47% free 4781K/8967K, external
55469K/57517K, paused 64ms
dalvikvm: GC_EXTERNAL_ALLOC freed <1K, 47% free 4781K/8967K, external
55469K/57517K, paused 80ms
dalvikvm: GC_FOR_MALLOC freed 0K, 47% free 4781K/8967K, external
55469K/57517K, paused 39ms

I compare the number in above output with the number in "Heap" window
of DDMS. "free 4781K/8967K" seems corresponding to "Allocated" and
"Heap size" in "Heap" of DDMS. However, I'm not sure what is "external
55469K/57517K". I suspect that it is memory allocated by native code.
Does anybody know this?

Thanks
Jason

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