--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/share/gc/shenandoah/shenandoahHeapRegionCounters.cpp Mon Dec 10 15:47:44 2018 +0100
@@ -0,0 +1,111 @@
+/*
+ * Copyright (c) 2016, 2018, Red Hat, Inc. All rights reserved.
+ *
+ * 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/shenandoahHeap.inline.hpp"
+#include "gc/shenandoah/shenandoahHeapRegion.hpp"
+#include "gc/shenandoah/shenandoahHeapRegionSet.hpp"
+#include "gc/shenandoah/shenandoahHeapRegionCounters.hpp"
+#include "memory/resourceArea.hpp"
+#include "runtime/perfData.inline.hpp"
+
+ShenandoahHeapRegionCounters::ShenandoahHeapRegionCounters() :
+ _last_sample_millis(0)
+{
+ if (UsePerfData && ShenandoahRegionSampling) {
+ EXCEPTION_MARK;
+ ResourceMark rm;
+ ShenandoahHeap* heap = ShenandoahHeap::heap();
+ size_t num_regions = heap->num_regions();
+ const char* cns = PerfDataManager::name_space("shenandoah", "regions");
+ _name_space = NEW_C_HEAP_ARRAY(char, strlen(cns)+1, mtGC);
+ strcpy(_name_space, cns);
+
+ const char* cname = PerfDataManager::counter_name(_name_space, "timestamp");
+ _timestamp = PerfDataManager::create_long_variable(SUN_GC, cname, PerfData::U_None, CHECK);
+
+ cname = PerfDataManager::counter_name(_name_space, "max_regions");
+ PerfDataManager::create_constant(SUN_GC, cname, PerfData::U_None, num_regions, CHECK);
+
+ cname = PerfDataManager::counter_name(_name_space, "region_size");
+ PerfDataManager::create_constant(SUN_GC, cname, PerfData::U_None, ShenandoahHeapRegion::region_size_bytes() >> 10, CHECK);
+
+ cname = PerfDataManager::counter_name(_name_space, "status");
+ _status = PerfDataManager::create_long_variable(SUN_GC, cname,
+ PerfData::U_None, CHECK);
+
+ _regions_data = NEW_C_HEAP_ARRAY(PerfVariable*, num_regions, mtGC);
+ for (uint i = 0; i < num_regions; i++) {
+ const char* reg_name = PerfDataManager::name_space(_name_space, "region", i);
+ const char* data_name = PerfDataManager::counter_name(reg_name, "data");
+ const char* ns = PerfDataManager::ns_to_string(SUN_GC);
+ const char* fullname = PerfDataManager::counter_name(ns, data_name);
+ assert(!PerfDataManager::exists(fullname), "must not exist");
+ _regions_data[i] = PerfDataManager::create_long_variable(SUN_GC, data_name,
+ PerfData::U_None, CHECK);
+ }
+ }
+}
+
+ShenandoahHeapRegionCounters::~ShenandoahHeapRegionCounters() {
+ if (_name_space != NULL) FREE_C_HEAP_ARRAY(char, _name_space);
+}
+
+void ShenandoahHeapRegionCounters::update() {
+ if (ShenandoahRegionSampling) {
+ jlong current = os::javaTimeMillis();
+ jlong last = _last_sample_millis;
+ if (current - last > ShenandoahRegionSamplingRate &&
+ Atomic::cmpxchg(current, &_last_sample_millis, last) == last) {
+
+ ShenandoahHeap* heap = ShenandoahHeap::heap();
+ jlong status = 0;
+ if (heap->is_concurrent_mark_in_progress()) status |= 1 << 0;
+ if (heap->is_evacuation_in_progress()) status |= 1 << 1;
+ if (heap->is_update_refs_in_progress()) status |= 1 << 2;
+ if (heap->is_concurrent_traversal_in_progress()) status |= 1 << 3;
+ _status->set_value(status);
+
+ _timestamp->set_value(os::elapsed_counter());
+
+ size_t num_regions = heap->num_regions();
+
+ {
+ ShenandoahHeapLocker locker(heap->lock());
+ size_t rs = ShenandoahHeapRegion::region_size_bytes();
+ for (uint i = 0; i < num_regions; i++) {
+ ShenandoahHeapRegion* r = heap->get_region(i);
+ jlong data = 0;
+ data |= ((100 * r->used() / rs) & PERCENT_MASK) << USED_SHIFT;
+ data |= ((100 * r->get_live_data_bytes() / rs) & PERCENT_MASK) << LIVE_SHIFT;
+ data |= ((100 * r->get_tlab_allocs() / rs) & PERCENT_MASK) << TLAB_SHIFT;
+ data |= ((100 * r->get_gclab_allocs() / rs) & PERCENT_MASK) << GCLAB_SHIFT;
+ data |= ((100 * r->get_shared_allocs() / rs) & PERCENT_MASK) << SHARED_SHIFT;
+ data |= (r->state_ordinal() & STATUS_MASK) << STATUS_SHIFT;
+ _regions_data[i]->set_value(data);
+ }
+ }
+
+ }
+ }
+}