On 08/31/2011 2:35 AM, Stefan Hajnoczi wrote:
On Tue, Aug 30, 2011 at 9:03 PM, Geoffrey Blake
<[email protected]> wrote:
Hi all,
I am trying to profile some java server applications using %>perf
record -a, and as expected the majority of the execution time of these
applications is spent within jit'ed java code. According to these
lists, the jit should be outputting a /tmp/perf-$pid.map file for each
thread being jit'ed. The Sun JIT does not seem to have this output
enabled by default. Does anyone here know what options I need to set
on the command line to get the JVM to output the symbol map files from
the JIT?
I don't know the answer but if you don't get one here you could check
the OProfile mailing list. I believe there was a solution for JIT
compilers with OProfile and people probably got popular JVMs like
HotSpot working. That might reveal what support HotSpot has for doing
this.
Geoffrey,
I don't know if there's a way to get perf to show you profile information for
Java class methods, but as Stefan said, you can indeed get this using oprofile.
See http://oprofile.sourceforge.net/doc/index.html and read every section with
"JIT" in the title.
-Maynard
Stefan
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