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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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16
hotspot/src/share/vm/classfile/classFileParser.cpp
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@ -547,7 +547,6 @@ objArrayHandle ClassFileParser::parse_interfaces(constantPoolHandle cp,
int length,
Handle class_loader,
Handle protection_domain,
PerfTraceTime* vmtimer,
symbolHandle class_name,
TRAPS) {
ClassFileStream* cfs = stream();
@ -575,13 +574,11 @@ objArrayHandle ClassFileParser::parse_interfaces(constantPoolHandle cp,
guarantee_property(unresolved_klass->byte_at(0) != JVM_SIGNATURE_ARRAY,
"Bad interface name in class file %s", CHECK_(nullHandle));
vmtimer->suspend(); // do not count recursive loading twice
// Call resolve_super so classcircularity is checked
klassOop k = SystemDictionary::resolve_super_or_fail(class_name,
unresolved_klass, class_loader, protection_domain,
false, CHECK_(nullHandle));
interf = KlassHandle(THREAD, k);
vmtimer->resume();
if (LinkWellKnownClasses) // my super type is well known to me
cp->klass_at_put(interface_index, interf()); // eagerly resolve
@ -2558,7 +2555,15 @@ instanceKlassHandle ClassFileParser::parseClassFile(symbolHandle name,
ClassFileStream* cfs = stream();
// Timing
PerfTraceTime vmtimer(ClassLoader::perf_accumulated_time());
assert(THREAD->is_Java_thread(), "must be a JavaThread");
JavaThread* jt = (JavaThread*) THREAD;
PerfClassTraceTime ctimer(ClassLoader::perf_class_parse_time(),
ClassLoader::perf_class_parse_selftime(),
NULL,
jt->get_thread_stat()->perf_recursion_counts_addr(),
jt->get_thread_stat()->perf_timers_addr(),
PerfClassTraceTime::PARSE_CLASS);
_has_finalizer = _has_empty_finalizer = _has_vanilla_constructor = false;
@ -2738,7 +2743,7 @@ instanceKlassHandle ClassFileParser::parseClassFile(symbolHandle name,
if (itfs_len == 0) {
local_interfaces = objArrayHandle(THREAD, Universe::the_empty_system_obj_array());
} else {
local_interfaces = parse_interfaces(cp, itfs_len, class_loader, protection_domain, &vmtimer, _class_name, CHECK_(nullHandle));
local_interfaces = parse_interfaces(cp, itfs_len, class_loader, protection_domain, _class_name, CHECK_(nullHandle));
}
// Fields (offsets are filled in later)
@ -2782,6 +2787,7 @@ instanceKlassHandle ClassFileParser::parseClassFile(symbolHandle name,
protection_domain,
true,
CHECK_(nullHandle));
KlassHandle kh (THREAD, k);
super_klass = instanceKlassHandle(THREAD, kh());
if (LinkWellKnownClasses) // my super class is well known to me