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zServiceability.cpp
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zServiceability.cpp
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/*
* Copyright (c) 2017, 2021, Oracle and/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"
#include "gc/shared/generationCounters.hpp"
#include "gc/shared/hSpaceCounters.hpp"
#include "gc/z/zCollectedHeap.hpp"
#include "gc/z/zHeap.inline.hpp"
#include "gc/z/zServiceability.hpp"
#include "memory/metaspaceCounters.hpp"
#include "runtime/perfData.hpp"
class ZGenerationCounters : public GenerationCounters {
public:
ZGenerationCounters(const char* name, int ordinal, int spaces,
size_t min_capacity, size_t max_capacity, size_t curr_capacity) :
GenerationCounters(name, ordinal, spaces,
min_capacity, max_capacity, curr_capacity) {}
void update_capacity(size_t capacity) {
_current_size->set_value(capacity);
}
};
// Class to expose perf counters used by jstat.
class ZServiceabilityCounters : public CHeapObj<mtGC> {
private:
ZGenerationCounters _generation_counters;
HSpaceCounters _space_counters;
CollectorCounters _collector_counters;
public:
ZServiceabilityCounters(size_t min_capacity, size_t max_capacity);
CollectorCounters* collector_counters();
void update_sizes();
};
ZServiceabilityCounters::ZServiceabilityCounters(size_t min_capacity, size_t max_capacity) :
// generation.1
_generation_counters("old" /* name */,
1 /* ordinal */,
1 /* spaces */,
min_capacity /* min_capacity */,
max_capacity /* max_capacity */,
min_capacity /* curr_capacity */),
// generation.1.space.0
_space_counters(_generation_counters.name_space(),
"space" /* name */,
0 /* ordinal */,
max_capacity /* max_capacity */,
min_capacity /* init_capacity */),
// gc.collector.2
_collector_counters("Z concurrent cycle pauses" /* name */,
2 /* ordinal */) {}
CollectorCounters* ZServiceabilityCounters::collector_counters() {
return &_collector_counters;
}
void ZServiceabilityCounters::update_sizes() {
if (UsePerfData) {
const size_t capacity = ZHeap::heap()->capacity();
const size_t used = MIN2(ZHeap::heap()->used(), capacity);
_generation_counters.update_capacity(capacity);
_space_counters.update_capacity(capacity);
_space_counters.update_used(used);
MetaspaceCounters::update_performance_counters();
CompressedClassSpaceCounters::update_performance_counters();
}
}
ZServiceabilityMemoryPool::ZServiceabilityMemoryPool(size_t min_capacity, size_t max_capacity) :
CollectedMemoryPool("ZHeap",
min_capacity,
max_capacity,
true /* support_usage_threshold */) {}
size_t ZServiceabilityMemoryPool::used_in_bytes() {
return ZHeap::heap()->used();
}
MemoryUsage ZServiceabilityMemoryPool::get_memory_usage() {
const size_t committed = ZHeap::heap()->capacity();
const size_t used = MIN2(ZHeap::heap()->used(), committed);
return MemoryUsage(initial_size(), used, committed, max_size());
}
ZServiceabilityMemoryManager::ZServiceabilityMemoryManager(const char* name,
const char* end_message,
ZServiceabilityMemoryPool* pool) :
GCMemoryManager(name, end_message) {
add_pool(pool);
}
ZServiceability::ZServiceability(size_t min_capacity, size_t max_capacity) :
_min_capacity(min_capacity),
_max_capacity(max_capacity),
_memory_pool(_min_capacity, _max_capacity),
_cycle_memory_manager("ZGC Cycles", "end of GC cycle", &_memory_pool),
_pause_memory_manager("ZGC Pauses", "end of GC pause", &_memory_pool),
_counters(NULL) {}
void ZServiceability::initialize() {
_counters = new ZServiceabilityCounters(_min_capacity, _max_capacity);
}
MemoryPool* ZServiceability::memory_pool() {
return &_memory_pool;
}
GCMemoryManager* ZServiceability::cycle_memory_manager() {
return &_cycle_memory_manager;
}
GCMemoryManager* ZServiceability::pause_memory_manager() {
return &_pause_memory_manager;
}
ZServiceabilityCounters* ZServiceability::counters() {
return _counters;
}
ZServiceabilityCycleTracer::ZServiceabilityCycleTracer() :
_memory_manager_stats(ZHeap::heap()->serviceability_cycle_memory_manager(),
ZCollectedHeap::heap()->gc_cause(),
true /* allMemoryPoolsAffected */,
true /* recordGCBeginTime */,
true /* recordPreGCUsage */,
true /* recordPeakUsage */,
true /* recordPostGCUsage */,
true /* recordAccumulatedGCTime */,
true /* recordGCEndTime */,
true /* countCollection */) {}
ZServiceabilityPauseTracer::ZServiceabilityPauseTracer() :
_svc_gc_marker(SvcGCMarker::CONCURRENT),
_counters_stats(ZHeap::heap()->serviceability_counters()->collector_counters()),
_memory_manager_stats(ZHeap::heap()->serviceability_pause_memory_manager(),
ZCollectedHeap::heap()->gc_cause(),
true /* allMemoryPoolsAffected */,
true /* recordGCBeginTime */,
false /* recordPreGCUsage */,
false /* recordPeakUsage */,
false /* recordPostGCUsage */,
true /* recordAccumulatedGCTime */,
true /* recordGCEndTime */,
true /* countCollection */) {}
ZServiceabilityPauseTracer::~ZServiceabilityPauseTracer() {
ZHeap::heap()->serviceability_counters()->update_sizes();
MemoryService::track_memory_usage();
}