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6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC

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Call newly created CollectedHeap::dump_{pre,post}_full_gc before and after every stop-world full collection cycle on GenCollectedHeap and ParallelScavengeHeap. (Support for G1CollectedHeap forthcoming under CR 6810861.) Small modifications to existing heap dumping and class histogram implementation, especially to allow multiple on-the-fly histos/dumps by the VM thread during a single safepoint.

Reviewed-by: jmasa, alanb, mchung
This commit is contained in:
Y. Srinivas Ramakrishna 2009-03-02 16:37:04 -08:00
parent dd4aaeadd4
commit 72bfacbd95
15 changed files with 170 additions and 62 deletions
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4
hotspot/src/share/vm/gc_implementation/parallelScavenge/psMarkSweep.cpp
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@ -125,6 +125,8 @@ void PSMarkSweep::invoke_no_policy(bool clear_all_softrefs) {
perm_gen->verify_object_start_array();
}
heap->pre_full_gc_dump();
// Filled in below to track the state of the young gen after the collection.
bool eden_empty;
bool survivors_empty;
@ -363,6 +365,8 @@ void PSMarkSweep::invoke_no_policy(bool clear_all_softrefs) {
Universe::print_heap_after_gc();
}
heap->post_full_gc_dump();
#ifdef TRACESPINNING
ParallelTaskTerminator::print_termination_counts();
#endif

4
hotspot/src/share/vm/gc_implementation/parallelScavenge/psParallelCompact.cpp
View file

@ -1982,6 +1982,8 @@ void PSParallelCompact::invoke_no_policy(bool maximum_heap_compaction) {
heap->record_gen_tops_before_GC();
}
heap->pre_full_gc_dump();
_print_phases = PrintGCDetails && PrintParallelOldGCPhaseTimes;
// Make sure data structures are sane, make the heap parsable, and do other
@ -2204,6 +2206,8 @@ void PSParallelCompact::invoke_no_policy(bool maximum_heap_compaction) {
gc_task_manager()->print_task_time_stamps();
}
heap->post_full_gc_dump();
#ifdef TRACESPINNING
ParallelTaskTerminator::print_termination_counts();
#endif

2
hotspot/src/share/vm/gc_implementation/shared/vmGCOperations.cpp
View file

@ -121,7 +121,7 @@ void VM_GC_HeapInspection::doit() {
// make the heap parsable (no need to retire TLABs)
ch->ensure_parsability(false);
}
HeapInspection::heap_inspection(_out);
HeapInspection::heap_inspection(_out, _need_prologue /* need_prologue */);
}

5
hotspot/src/share/vm/gc_implementation/shared/vmGCOperations.hpp
View file

@ -112,13 +112,16 @@ class VM_GC_HeapInspection: public VM_GC_Operation {
private:
outputStream* _out;
bool _full_gc;
bool _need_prologue;
public:
VM_GC_HeapInspection(outputStream* out, bool request_full_gc) :
VM_GC_HeapInspection(outputStream* out, bool request_full_gc,
bool need_prologue) :
VM_GC_Operation(0 /* total collections, dummy, ignored */,
0 /* total full collections, dummy, ignored */,
request_full_gc) {
_out = out;
_full_gc = request_full_gc;
_need_prologue = need_prologue;
}
~VM_GC_HeapInspection() {}