archive/jdk
1
0
Fork 0
mirror of https://github.com/openjdk/jdk.git synced 2025-09-16 00:54:38 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions

4957990: Perm heap bloat in JVM

Browse source 
Treat ProfileData in MDO's as a source of weak, not strong, roots. Fixes the bug for stop-world collection -- the case of concurrent collection will be fixed separately.

Reviewed-by: jcoomes, jmasa, kvn, never
This commit is contained in:
Y. Srinivas Ramakrishna 2009-09-02 00:04:29 -07:00
parent 2491751525
commit c6763b5bad
27 changed files with 385 additions and 65 deletions
Download patch file Download diff file Expand all files Collapse all files

8
hotspot/src/share/vm/gc_implementation/parallelScavenge/psCompactionManager.cpp
View file

@ -61,12 +61,16 @@ ParCompactionManager::ParCompactionManager() :
int size =
(SystemDictionary::number_of_classes() * 2) * 2 / ParallelGCThreads;
_revisit_klass_stack = new (ResourceObj::C_HEAP) GrowableArray<Klass*>(size, true);
// From some experiments (#klass/k)^2 for k = 10 seems a better fit, but this will
// have to do for now until we are able to investigate a more optimal setting.
_revisit_mdo_stack = new (ResourceObj::C_HEAP) GrowableArray<DataLayout*>(size*2, true);
}
ParCompactionManager::~ParCompactionManager() {
delete _overflow_stack;
delete _revisit_klass_stack;
delete _revisit_mdo_stack;
// _manager_array and _stack_array are statics
// shared with all instances of ParCompactionManager
// should not be deallocated.
@ -195,6 +199,7 @@ ParCompactionManager::gc_thread_compaction_manager(int index) {
void ParCompactionManager::reset() {
for(uint i=0; i<ParallelGCThreads+1; i++) {
manager_array(i)->revisit_klass_stack()->clear();
manager_array(i)->revisit_mdo_stack()->clear();
}
}
@ -296,6 +301,7 @@ void ParCompactionManager::drain_region_stacks() {
#ifdef ASSERT
bool ParCompactionManager::stacks_have_been_allocated() {
return (revisit_klass_stack()->data_addr() != NULL);
return (revisit_klass_stack()->data_addr() != NULL &&
revisit_mdo_stack()->data_addr() != NULL);
}
#endif