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6950075: nmethod sweeper should operate concurrently

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Reviewed-by: never, kvn
This commit is contained in:
Eric Caspole 2010-05-17 16:50:07 -07:00 • committed by Tom Rodriguez
parent 85854f0e13
commit 430574f398
9 changed files with 171 additions and 89 deletions
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15
hotspot/src/share/vm/compiler/compileBroker.cpp
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@ -461,12 +461,25 @@ void CompileQueue::add(CompileTask* task) {
//
// Get the next CompileTask from a CompileQueue
CompileTask* CompileQueue::get() {
NMethodSweeper::possibly_sweep();
MutexLocker locker(lock());
// Wait for an available CompileTask.
while (_first == NULL) {
// There is no work to be done right now. Wait.
lock()->wait();
if (UseCodeCacheFlushing && (!CompileBroker::should_compile_new_jobs() || CodeCache::needs_flushing())) {
// During the emergency sweeping periods, wake up and sweep occasionally
bool timedout = lock()->wait(!Mutex::_no_safepoint_check_flag, NmethodSweepCheckInterval*1000);
if (timedout) {
MutexUnlocker ul(lock());
// When otherwise not busy, run nmethod sweeping
NMethodSweeper::possibly_sweep();
}
} else {
// During normal operation no need to wake up on timer
lock()->wait();
}
}
CompileTask* task = _first;