$ perf record –F 1009 java ...
$ perf report
4.70% java [kernel.kallsyms] [k] clear_page_c
2.10% java libpthread-2.17.so [.] pthread_cond_wait
1.97% java libjvm.so [.] Unsafe_Park
1.40% java libjvm.so [.] Parker::park
1.31% java [kernel.kallsyms] [k] try_to_wake_up
1.31% java perf-18762.map [.] 0x00007f8510e9e757
1.21% java perf-18762.map [.] 0x00007f8510e9e89e
1.17% java perf-18762.map [.] 0x00007f8510e9cc17
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