113 lines
4.9 KiB
C++
113 lines
4.9 KiB
C++
/*
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* Copyright (c) 2016, 2020, Red Hat, Inc. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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#include "precompiled.hpp"
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#include "gc/shenandoah/shenandoahHeap.inline.hpp"
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#include "gc/shenandoah/shenandoahHeapRegion.inline.hpp"
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#include "gc/shenandoah/shenandoahHeapRegionSet.hpp"
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#include "gc/shenandoah/shenandoahHeapRegionCounters.hpp"
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#include "memory/resourceArea.hpp"
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#include "runtime/atomic.hpp"
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#include "runtime/perfData.inline.hpp"
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ShenandoahHeapRegionCounters::ShenandoahHeapRegionCounters() :
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_last_sample_millis(0)
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{
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if (UsePerfData && ShenandoahRegionSampling) {
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EXCEPTION_MARK;
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ResourceMark rm;
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ShenandoahHeap* heap = ShenandoahHeap::heap();
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size_t num_regions = heap->num_regions();
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const char* cns = PerfDataManager::name_space("shenandoah", "regions");
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_name_space = NEW_C_HEAP_ARRAY(char, strlen(cns)+1, mtGC);
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strcpy(_name_space, cns);
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const char* cname = PerfDataManager::counter_name(_name_space, "timestamp");
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_timestamp = PerfDataManager::create_long_variable(SUN_GC, cname, PerfData::U_None, CHECK);
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cname = PerfDataManager::counter_name(_name_space, "max_regions");
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PerfDataManager::create_constant(SUN_GC, cname, PerfData::U_None, num_regions, CHECK);
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cname = PerfDataManager::counter_name(_name_space, "region_size");
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PerfDataManager::create_constant(SUN_GC, cname, PerfData::U_None, ShenandoahHeapRegion::region_size_bytes() >> 10, CHECK);
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cname = PerfDataManager::counter_name(_name_space, "status");
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_status = PerfDataManager::create_long_variable(SUN_GC, cname,
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PerfData::U_None, CHECK);
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_regions_data = NEW_C_HEAP_ARRAY(PerfVariable*, num_regions, mtGC);
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for (uint i = 0; i < num_regions; i++) {
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const char* reg_name = PerfDataManager::name_space(_name_space, "region", i);
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const char* data_name = PerfDataManager::counter_name(reg_name, "data");
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const char* ns = PerfDataManager::ns_to_string(SUN_GC);
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const char* fullname = PerfDataManager::counter_name(ns, data_name);
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assert(!PerfDataManager::exists(fullname), "must not exist");
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_regions_data[i] = PerfDataManager::create_long_variable(SUN_GC, data_name,
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PerfData::U_None, CHECK);
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}
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}
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}
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ShenandoahHeapRegionCounters::~ShenandoahHeapRegionCounters() {
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if (_name_space != NULL) FREE_C_HEAP_ARRAY(char, _name_space);
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}
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void ShenandoahHeapRegionCounters::update() {
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if (ShenandoahRegionSampling) {
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jlong current = nanos_to_millis(os::javaTimeNanos());
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jlong last = _last_sample_millis;
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if (current - last > ShenandoahRegionSamplingRate &&
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Atomic::cmpxchg(&_last_sample_millis, last, current) == last) {
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ShenandoahHeap* heap = ShenandoahHeap::heap();
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jlong status = 0;
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if (heap->is_concurrent_mark_in_progress()) status |= 1 << 0;
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if (heap->is_evacuation_in_progress()) status |= 1 << 1;
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if (heap->is_update_refs_in_progress()) status |= 1 << 2;
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_status->set_value(status);
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_timestamp->set_value(os::elapsed_counter());
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size_t num_regions = heap->num_regions();
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{
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ShenandoahHeapLocker locker(heap->lock());
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size_t rs = ShenandoahHeapRegion::region_size_bytes();
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for (uint i = 0; i < num_regions; i++) {
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ShenandoahHeapRegion* r = heap->get_region(i);
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jlong data = 0;
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data |= ((100 * r->used() / rs) & PERCENT_MASK) << USED_SHIFT;
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data |= ((100 * r->get_live_data_bytes() / rs) & PERCENT_MASK) << LIVE_SHIFT;
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data |= ((100 * r->get_tlab_allocs() / rs) & PERCENT_MASK) << TLAB_SHIFT;
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data |= ((100 * r->get_gclab_allocs() / rs) & PERCENT_MASK) << GCLAB_SHIFT;
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data |= ((100 * r->get_shared_allocs() / rs) & PERCENT_MASK) << SHARED_SHIFT;
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data |= (r->state_ordinal() & STATUS_MASK) << STATUS_SHIFT;
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_regions_data[i]->set_value(data);
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}
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}
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}
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}
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}
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