On Jan 30, 2008 5:36 PM, Z W <[EMAIL PROTECTED]> wrote: > Is there an open source performance tool out there that gives a complete > "picture" on all the methods called > in a java application run ? In other words, I like to know if there's a tool > out there that could help me > determine if a method within a java app that would indicate a "bottleneck" > performance issue > so that we could improve the algorithm performance.
Th Java heap profiling agent is extremely useful for profiling method calls: http://prefetch.net/blog/index.php/2008/02/02/profiling-java-methods-with-the-heap-profiling-agent/ If you need to profile method calls in production, you should take a look at the j_cputime.d script [1] in the DTraceToolkit. - Ryan -- UNIX Administrator http://prefetch.net [1] j_cputime.d output $ j_cputime.d 3 Top 3 counts, PID TYPE NAME COUNT 20221 method java/lang/String.getChars 76183 20221 method java/lang/System.arraycopy 167600 0 total - 944774 Top 3 exclusive method on-CPU times (us), PID TYPE NAME TOTAL 20221 method java/util/Arrays.copyOf 174943 20221 method java/lang/System.arraycopy 189579 0 total - 1346227 Top 3 inclusive method on-CPU times (us), PID TYPE NAME TOTAL 20221 method java/lang/AbstractStringBuilder.expandCapacity 339847 20221 method java/lang/AbstractStringBuilder.append 664615 20221 method java/lang/StringBuilder.append 772450 _______________________________________________ perf-discuss mailing list perf-discuss@opensolaris.org
