Oh yes, the link to the hprof spec: [1] https://java.net/downloads/heap-snapshot/hprof-binary-format.html
On Sunday, September 7, 2014 3:42:12 PM UTC-4, David Cameron wrote: > > To set the stage: I'm wrestling with OutOfMemoryExceptions, and beginning > to suspect heap fragmentation as the root cause. > > I know that the hprof files dumped from the monitor tool are a slightly > different format (JAVA PROFILE 1.0.3) from the "standard" java hprofs (JAVA > PROFILE 1.0.2). I know that hprof-conv can convert a 1.0.3 formatted hprof > to a 1.0.2 formatted hprof. I also think I've found a spec for the binary > 1.0.2 format [1]. However, I was curious about the 1.0.3 format and have > just done some searching, but haven't been able to find anything describing > it on the developers.android.com site or the AOSP site at > source.android.com. Is the 1.0.3 format documented and described anywhere? > > I have looked at both YourKit and MAT to analyze the heap dumps, but > neither of them address fragmentation at all. I guess fragmentation is > not much of an issue for server and desktop jvms. The hprof format > appears to contain address information, so some kind of fragmentation > analysis should be possible. I read that ART's GC will also eventually be a > compacting collector, which is good news! In the meantime I'd like to try > to use the address information in the hprof files to estimate heap > fragmentation. > > > Dave > -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en --- You received this message because you are subscribed to the Google Groups "Android Developers" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
