61 lines
2.3 KiB
C++
61 lines
2.3 KiB
C++
/*
|
|
* Copyright (c) 2019, Red Hat, Inc. All rights reserved.
|
|
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
|
|
*
|
|
* This code is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License version 2 only, as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* This code is distributed in the hope that it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
|
* version 2 for more details (a copy is included in the LICENSE file that
|
|
* accompanied this code).
|
|
*
|
|
* You should have received a copy of the GNU General Public License version
|
|
* 2 along with this work; if not, write to the Free Software Foundation,
|
|
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*
|
|
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
|
|
* or visit www.oracle.com if you need additional information or have any
|
|
* questions.
|
|
*
|
|
*/
|
|
|
|
#include "precompiled.hpp"
|
|
#include "gc/shenandoah/shenandoahPassiveMode.hpp"
|
|
#include "gc/shenandoah/heuristics/shenandoahPassiveHeuristics.hpp"
|
|
#include "logging/log.hpp"
|
|
#include "logging/logTag.hpp"
|
|
|
|
void ShenandoahPassiveMode::initialize_flags() const {
|
|
// Do not allow concurrent cycles.
|
|
FLAG_SET_DEFAULT(ExplicitGCInvokesConcurrent, false);
|
|
FLAG_SET_DEFAULT(ShenandoahImplicitGCInvokesConcurrent, false);
|
|
|
|
// Passive runs with max speed for allocation, because GC is always STW
|
|
SHENANDOAH_ERGO_DISABLE_FLAG(ShenandoahPacing);
|
|
|
|
// No need for evacuation reserve with Full GC, only for Degenerated GC.
|
|
if (!ShenandoahDegeneratedGC) {
|
|
SHENANDOAH_ERGO_OVERRIDE_DEFAULT(ShenandoahEvacReserve, 0);
|
|
}
|
|
|
|
// Disable known barriers by default.
|
|
SHENANDOAH_ERGO_DISABLE_FLAG(ShenandoahLoadRefBarrier);
|
|
SHENANDOAH_ERGO_DISABLE_FLAG(ShenandoahSATBBarrier);
|
|
SHENANDOAH_ERGO_DISABLE_FLAG(ShenandoahStoreValEnqueueBarrier);
|
|
SHENANDOAH_ERGO_DISABLE_FLAG(ShenandoahCASBarrier);
|
|
SHENANDOAH_ERGO_DISABLE_FLAG(ShenandoahCloneBarrier);
|
|
|
|
// Final configuration checks
|
|
// No barriers are required to run.
|
|
}
|
|
ShenandoahHeuristics* ShenandoahPassiveMode::initialize_heuristics() const {
|
|
if (ShenandoahGCHeuristics != NULL) {
|
|
return new ShenandoahPassiveHeuristics();
|
|
}
|
|
ShouldNotReachHere();
|
|
return NULL;
|
|
}
|