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comparison src/share/vm/gc_implementation/concurrentMarkSweep/vmCMSOperations.hpp @ 2365:a181f3a124dd

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6987703: iCMS: Intermittent hang with gc/gctests/CallGC/CallGC01 and +ExplicitGCInvokesConcurrent Summary: Count enable_icms() and disable_icms() events so as to prevent inteference between concurrent calls, which can cause the iCMS thread to be left stranded in icms_wait() with an unserviced request and no young allocations to unwedge it. Reviewed-by: jcoomes, poonam
author ysr
date Mon, 14 Mar 2011 21:52:24 -0700
parents c798c277ddd1
children
comparison
equal deleted inserted replaced
2364:04d1138b4cce 2365:a181f3a124dd
126 126
127 127
128 // VM operation to invoke a concurrent collection of the heap as a 128 // VM operation to invoke a concurrent collection of the heap as a
129 // GenCollectedHeap heap. 129 // GenCollectedHeap heap.
130 class VM_GenCollectFullConcurrent: public VM_GC_Operation { 130 class VM_GenCollectFullConcurrent: public VM_GC_Operation {
131 bool _disabled_icms;
131 public: 132 public:
132 VM_GenCollectFullConcurrent(unsigned int gc_count_before, 133 VM_GenCollectFullConcurrent(unsigned int gc_count_before,
133 unsigned int full_gc_count_before, 134 unsigned int full_gc_count_before,
134 GCCause::Cause gc_cause) 135 GCCause::Cause gc_cause)
135 : VM_GC_Operation(gc_count_before, gc_cause, full_gc_count_before, true /* full */) { 136 : VM_GC_Operation(gc_count_before, gc_cause, full_gc_count_before, true /* full */),
137 _disabled_icms(false)
138 {
136 assert(FullGCCount_lock != NULL, "Error"); 139 assert(FullGCCount_lock != NULL, "Error");
137 assert(UseAsyncConcMarkSweepGC, "Else will hang caller"); 140 assert(UseAsyncConcMarkSweepGC, "Else will hang caller");
138 } 141 }
139 ~VM_GenCollectFullConcurrent() {} 142 ~VM_GenCollectFullConcurrent() {}
140 virtual VMOp_Type type() const { return VMOp_GenCollectFullConcurrent; } 143 virtual VMOp_Type type() const { return VMOp_GenCollectFullConcurrent; }