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8332841: GenShen: Pull shared members from control thread into common…
… base class Reviewed-by: ysr
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William Kemper
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May 24, 2024
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112 changes: 112 additions & 0 deletions
112
src/hotspot/share/gc/shenandoah/shenandoahController.cpp
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| /* | ||
| * Copyright Amazon.com Inc. or its affiliates. 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" | ||
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| #include "gc/shared/gc_globals.hpp" | ||
| #include "gc/shenandoah/shenandoahController.hpp" | ||
| #include "gc/shenandoah/shenandoahHeap.hpp" | ||
| #include "gc/shenandoah/shenandoahHeapRegion.inline.hpp" | ||
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| void ShenandoahController::pacing_notify_alloc(size_t words) { | ||
| assert(ShenandoahPacing, "should only call when pacing is enabled"); | ||
| Atomic::add(&_allocs_seen, words, memory_order_relaxed); | ||
| } | ||
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| size_t ShenandoahController::reset_allocs_seen() { | ||
| return Atomic::xchg(&_allocs_seen, (size_t)0, memory_order_relaxed); | ||
| } | ||
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| void ShenandoahController::prepare_for_graceful_shutdown() { | ||
| _graceful_shutdown.set(); | ||
| } | ||
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| bool ShenandoahController::in_graceful_shutdown() { | ||
| return _graceful_shutdown.is_set(); | ||
| } | ||
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| void ShenandoahController::update_gc_id() { | ||
| Atomic::inc(&_gc_id); | ||
| } | ||
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| size_t ShenandoahController::get_gc_id() { | ||
| return Atomic::load(&_gc_id); | ||
| } | ||
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| void ShenandoahController::handle_alloc_failure(ShenandoahAllocRequest& req, bool block) { | ||
| ShenandoahHeap* heap = ShenandoahHeap::heap(); | ||
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| assert(current()->is_Java_thread(), "expect Java thread here"); | ||
| bool is_humongous = req.size() > ShenandoahHeapRegion::humongous_threshold_words(); | ||
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| if (try_set_alloc_failure_gc(is_humongous)) { | ||
| // Only report the first allocation failure | ||
| log_info(gc)("Failed to allocate %s, " SIZE_FORMAT "%s", | ||
| req.type_string(), | ||
| byte_size_in_proper_unit(req.size() * HeapWordSize), proper_unit_for_byte_size(req.size() * HeapWordSize)); | ||
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| // Now that alloc failure GC is scheduled, we can abort everything else | ||
| heap->cancel_gc(GCCause::_allocation_failure); | ||
| } | ||
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| if (block) { | ||
| MonitorLocker ml(&_alloc_failure_waiters_lock); | ||
| while (is_alloc_failure_gc()) { | ||
| ml.wait(); | ||
| } | ||
| } | ||
| } | ||
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| void ShenandoahController::handle_alloc_failure_evac(size_t words) { | ||
| ShenandoahHeap* heap = ShenandoahHeap::heap(); | ||
| bool is_humongous = (words > ShenandoahHeapRegion::region_size_words()); | ||
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| if (try_set_alloc_failure_gc(is_humongous)) { | ||
| // Only report the first allocation failure | ||
| log_info(gc)("Failed to allocate " SIZE_FORMAT "%s for evacuation", | ||
| byte_size_in_proper_unit(words * HeapWordSize), proper_unit_for_byte_size(words * HeapWordSize)); | ||
| } | ||
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| // Forcefully report allocation failure | ||
| heap->cancel_gc(GCCause::_shenandoah_allocation_failure_evac); | ||
| } | ||
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| void ShenandoahController::notify_alloc_failure_waiters() { | ||
| _alloc_failure_gc.unset(); | ||
| _humongous_alloc_failure_gc.unset(); | ||
| MonitorLocker ml(&_alloc_failure_waiters_lock); | ||
| ml.notify_all(); | ||
| } | ||
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| bool ShenandoahController::try_set_alloc_failure_gc(bool is_humongous) { | ||
| if (is_humongous) { | ||
| _humongous_alloc_failure_gc.try_set(); | ||
| } | ||
| return _alloc_failure_gc.try_set(); | ||
| } | ||
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| bool ShenandoahController::is_alloc_failure_gc() { | ||
| return _alloc_failure_gc.is_set(); | ||
| } | ||
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