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8221392: Reduce ConcurrentGCThreads spinning during start up

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Reviewed-by: eosterlund, kbarrett
This commit is contained in:
Per Lidén 2019-03-27 10:38:49 +01:00
parent 229d923b27
commit 8e258756bb
5 changed files with 17 additions and 11 deletions
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13
src/hotspot/share/runtime/init.cpp
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@ -36,6 +36,7 @@
#include "runtime/handles.inline.hpp"
#include "runtime/icache.hpp"
#include "runtime/init.hpp"
#include "runtime/orderAccess.hpp"
#include "runtime/safepoint.hpp"
#include "runtime/sharedRuntime.hpp"
#include "services/memTracker.hpp"
@ -186,11 +187,19 @@ void exit_globals() {
static volatile bool _init_completed = false;
bool is_init_completed() {
return _init_completed;
return OrderAccess::load_acquire(&_init_completed);
}
void wait_init_completed() {
MonitorLockerEx ml(InitCompleted_lock, Monitor::_no_safepoint_check_flag);
while (!_init_completed) {
ml.wait(Monitor::_no_safepoint_check_flag);
}
}
void set_init_completed() {
assert(Universe::is_fully_initialized(), "Should have completed initialization");
_init_completed = true;
MonitorLockerEx ml(InitCompleted_lock, Monitor::_no_safepoint_check_flag);
OrderAccess::release_store(&_init_completed, true);
ml.notify_all();
}