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6857194: Add hotspot perf counters to aid class loading performance measurement

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Add new jvmstat counters to measure detailed class loading time

Reviewed-by: acorn, kamg
This commit is contained in:
Mandy Chung 2009-07-10 11:10:00 -07:00
parent c8140c1078
commit 08f5aeffc1
11 changed files with 274 additions and 33 deletions
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14
hotspot/src/share/vm/prims/jvm.cpp
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@ -756,6 +756,20 @@ static void is_lock_held_by_thread(Handle loader, PerfCounter* counter, TRAPS) {
static jclass jvm_define_class_common(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source, TRAPS) {
if (source == NULL) source = "__JVM_DefineClass__";
assert(THREAD->is_Java_thread(), "must be a JavaThread");
JavaThread* jt = (JavaThread*) THREAD;
PerfClassTraceTime vmtimer(ClassLoader::perf_define_appclass_time(),
ClassLoader::perf_define_appclass_selftime(),
ClassLoader::perf_define_appclasses(),
jt->get_thread_stat()->perf_recursion_counts_addr(),
jt->get_thread_stat()->perf_timers_addr(),
PerfClassTraceTime::DEFINE_CLASS);
if (UsePerfData) {
ClassLoader::perf_app_classfile_bytes_read()->inc(len);
}
// Since exceptions can be thrown, class initialization can take place
// if name is NULL no check for class name in .class stream has to be made.
symbolHandle class_name;