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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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31
hotspot/src/share/vm/oops/instanceKlass.cpp
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@ -158,9 +158,6 @@ bool instanceKlass::link_class_impl(
// timer handles recursion
assert(THREAD->is_Java_thread(), "non-JavaThread in link_class_impl");
JavaThread* jt = (JavaThread*)THREAD;
PerfTraceTimedEvent vmtimer(ClassLoader::perf_class_link_time(),
ClassLoader::perf_classes_linked(),
jt->get_thread_stat()->class_link_recursion_count_addr());
// link super class before linking this class
instanceKlassHandle super(THREAD, this_oop->super());
@ -194,6 +191,15 @@ bool instanceKlass::link_class_impl(
return true;
}
// trace only the link time for this klass that includes
// the verification time
PerfClassTraceTime vmtimer(ClassLoader::perf_class_link_time(),
ClassLoader::perf_class_link_selftime(),
ClassLoader::perf_classes_linked(),
jt->get_thread_stat()->perf_recursion_counts_addr(),
jt->get_thread_stat()->perf_timers_addr(),
PerfClassTraceTime::CLASS_LINK);
// verification & rewriting
{
ObjectLocker ol(this_oop, THREAD);
@ -203,12 +209,14 @@ bool instanceKlass::link_class_impl(
if (!this_oop->is_linked()) {
if (!this_oop->is_rewritten()) {
{
assert(THREAD->is_Java_thread(), "non-JavaThread in link_class_impl");
JavaThread* jt = (JavaThread*)THREAD;
// Timer includes any side effects of class verification (resolution,
// etc), but not recursive entry into verify_code().
PerfTraceTime timer(ClassLoader::perf_class_verify_time(),
jt->get_thread_stat()->class_verify_recursion_count_addr());
PerfClassTraceTime timer(ClassLoader::perf_class_verify_time(),
ClassLoader::perf_class_verify_selftime(),
ClassLoader::perf_classes_verified(),
jt->get_thread_stat()->perf_recursion_counts_addr(),
jt->get_thread_stat()->perf_timers_addr(),
PerfClassTraceTime::CLASS_VERIFY);
bool verify_ok = verify_code(this_oop, throw_verifyerror, THREAD);
if (!verify_ok) {
return false;
@ -350,9 +358,12 @@ void instanceKlass::initialize_impl(instanceKlassHandle this_oop, TRAPS) {
JavaThread* jt = (JavaThread*)THREAD;
// Timer includes any side effects of class initialization (resolution,
// etc), but not recursive entry into call_class_initializer().
PerfTraceTimedEvent timer(ClassLoader::perf_class_init_time(),
ClassLoader::perf_classes_inited(),
jt->get_thread_stat()->class_init_recursion_count_addr());
PerfClassTraceTime timer(ClassLoader::perf_class_init_time(),
ClassLoader::perf_class_init_selftime(),
ClassLoader::perf_classes_inited(),
jt->get_thread_stat()->perf_recursion_counts_addr(),
jt->get_thread_stat()->perf_timers_addr(),
PerfClassTraceTime::CLASS_CLINIT);
this_oop->call_class_initializer(THREAD);
}