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vt@C

Revised: 2nd/Nov./2003; Since: 26th/Jan./2003

AvP[VsCPUgpAgp????[eBeBvt@C??сEB?IIDGiJ?j??fobK??????B1998NSDK 1.2?I[X?~??Avt@COpAPI?JVMPI (Java Virtual Machine Profiler Intertface)W?p?\???A[UC??vt@CEG[WFgJ?\?As?R}hjava?IvV-Xrunxxx:yyy=zzz...?w?\?B

SDK 1.3 ?~??AW?vt@CEG[WFghprofAs?IvV-Xrunhprof?w??Bw?IvV??A擾??v????A-Xrunhprof?w?IvV??A=Xrunhprof:help?擾邱???B

>java -Xrunhprof:help
Hprof usage: -Xrunhprof[:help]|[:=, ...]
Option Name and Value  Description                Default
---------------------  ----------------------     -------
heap=dump|sites|all    heap profiling             all
cpu=samples|times|old  CPU usage                  off
monitor=y|n            monitor contention         n
format=a|b             ascii or binary output     a
file=            write data to file         java.hprof(.txt for ascii)
net=:      send data over a socket    write to file
depth=           stack trace depth          4
cutoff=         output cutoff point        0.0001
lineno=y|n             line number in traces?     y
thread=y|n             thread in traces?          n
doe=y|n                dump on exit?              y
gc_okay=y|n            GC okay during sampling    y
Example: java -Xrunhprof:cpu=samples,file=log.txt,depth=3 FooClass
Note: format=b cannot be used with cpu=old|times

vt@CEG[WFghprof????ASun?hLgQ?B

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