>/tmp/perf/perf record -k 1 -e cycles:u -o /tmp/perf.data java >-agentpath:/tmp/perf/libperf-jvmti.so -XX:+PreserveFramePointer >-XX:InitialCodeCacheSize=20M -XX:ReservedCodeCacheSize=1G -jar >dacapo-9.12-bach.jar jython
Its also possible the `InitialCodeCacheSize=20M` argument is masking the problem. Something like 4K would make the problem much easier to see. I see the problem every time .NET grows the cache across a 64K page boundary. 20M may mean you are allocating huge pages or something which might mask the problem. We may be allocating code pages 64K at a time.
