[aarch64-port-dev ] Java callstacks are truncated in perf on aarch64

[Edward Nevill]

On Wed, 2015-05-06 at 11:10 +0000, Alexeev, Alexander wrote:
> Hello
> 
> I've tried to collect call stacks for JDK release 1504 available from Linaro, it must be almost tip (build 1.9.0-internal-ed_2015_05_01_13_39-b00). Traces collected with this version are truncated.
> Significant part of them is lost now. Seems the only one java method is resolved in the trace. What might be wrong?
> I didn't find option such option as PreserveFramePointer available yet, and anyway not sure if it helps on aarch64

Hi Alexander,

I have created a webrev which allows the use of -XX:+PreserveFramePointer on aarch64

http://cr.openjdk.java.net/~enevill/8079564/webrev.00/

Could you try again with this webrev applied and using the option -XX:+PreserveFramePointer and let me know if the call traces are any better now.

Thanks,
Ed.