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src/share/vm/gc_implementation/g1/g1RootProcessor.cpp
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@@ -88,37 +88,35 @@
}
};
void G1RootProcessor::worker_has_discovered_all_strong_classes() {
- uint n_workers = _g1h->n_par_threads();
assert(ClassUnloadingWithConcurrentMark, "Currently only needed when doing G1 Class Unloading");
uint new_value = (uint)Atomic::add(1, &_n_workers_discovered_strong_classes);
- if (new_value == n_workers) {
+ if (new_value == n_workers()) {
// This thread is last. Notify the others.
MonitorLockerEx ml(&_lock, Mutex::_no_safepoint_check_flag);
_lock.notify_all();
}
}
void G1RootProcessor::wait_until_all_strong_classes_discovered() {
- uint n_workers = _g1h->n_par_threads();
assert(ClassUnloadingWithConcurrentMark, "Currently only needed when doing G1 Class Unloading");
- if ((uint)_n_workers_discovered_strong_classes != n_workers) {
+ if ((uint)_n_workers_discovered_strong_classes != n_workers()) {
MonitorLockerEx ml(&_lock, Mutex::_no_safepoint_check_flag);
- while ((uint)_n_workers_discovered_strong_classes != n_workers) {
+ while ((uint)_n_workers_discovered_strong_classes != n_workers()) {
_lock.wait(Mutex::_no_safepoint_check_flag, 0, false);
}
}
}
-G1RootProcessor::G1RootProcessor(G1CollectedHeap* g1h) :
+G1RootProcessor::G1RootProcessor(G1CollectedHeap* g1h, uint n_workers) :
_g1h(g1h),
_process_strong_tasks(new SubTasksDone(G1RP_PS_NumElements)),
- _srs(),
+ _srs(n_workers),
_lock(Mutex::leaf, "G1 Root Scanning barrier lock", false, Monitor::_safepoint_check_never),
_n_workers_discovered_strong_classes(0) {}
void G1RootProcessor::evacuate_roots(OopClosure* scan_non_heap_roots,
OopClosure* scan_non_heap_weak_roots,
@@ -251,11 +249,11 @@
}
}
{
G1GCParPhaseTimesTracker x(phase_times, G1GCPhaseTimes::ThreadRoots, worker_i);
- bool is_par = _g1h->n_par_threads() > 1;
+ bool is_par = n_workers() > 1;
Threads::possibly_parallel_oops_do(is_par, strong_roots, thread_stack_clds, strong_code);
}
}
void G1RootProcessor::process_vm_roots(OopClosure* strong_roots,
@@ -328,7 +326,15 @@
_g1h->g1_rem_set()->oops_into_collection_set_do(scan_rs, &scavenge_cs_nmethods, worker_i);
}
void G1RootProcessor::set_num_workers(uint active_workers) {
+ assert(active_workers == _srs.n_threads(),
+ err_msg("Mismatch between number of worker threads. active_workers: %u and n_workers(): %u",
+ active_workers,
+ _srs.n_threads()));
_process_strong_tasks->set_n_threads(active_workers);
}
+
+uint G1RootProcessor::n_workers() const {
+ return _srs.n_threads();
+}
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