view src/share/vm/gc_implementation/shared/gcTrace.cpp @ 4480:f82f0250456f

8008382: Remove redundant use of Atomic::add(jlong, jlong *) in create_new_gc_id() Summary: Moving register_gc_start() in to the CMS VM operation makes sure that create_new_gc_id() is not called by multiple threads in parallel. This removes the need for atomics in create_new_gc_d(). Also, Atomic::add(jlong, jlong *) is unimplemented for ARM. Reviewed-by: stefank, dholmes, ehelin
author brutisso
date Mon, 18 Feb 2013 14:13:52 +0100
parents bb74dc5ddf07
children e99b6a69b81d
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/*
 * Copyright (c) 2012, 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_implementation/shared/gcHeapSummary.hpp"
#include "gc_implementation/shared/gcTimer.hpp"
#include "gc_implementation/shared/gcTrace.hpp"
#include "memory/referenceProcessorStats.hpp"
#include "utilities/globalDefinitions.hpp"

#define assert_unset_gc_id() assert(_shared_gc_info.id() == SharedGCInfo::UNSET_GCID, "GC already started?")
#define assert_set_gc_id() assert(_shared_gc_info.id() != SharedGCInfo::UNSET_GCID, "GC not started?")

static jlong GCTracer_next_gc_id = 0;
static GCId create_new_gc_id() {
  return GCTracer_next_gc_id++;
}

void GCTracer::report_gc_start_impl(GCCause::Cause cause, jlong timestamp) {
  assert_unset_gc_id();

  GCId gc_id = create_new_gc_id();
  _shared_gc_info.set_id(gc_id);
  _shared_gc_info.set_cause(cause);
  _shared_gc_info.set_start_timestamp(timestamp);
}

void GCTracer::report_gc_start(GCCause::Cause cause, jlong timestamp) {
  assert_unset_gc_id();

  report_gc_start_impl(cause, timestamp);
}

bool GCTracer::has_reported_gc_start() const {
  return _shared_gc_info.id() != SharedGCInfo::UNSET_GCID;
}

void GCTracer::report_gc_end_impl(jlong timestamp, TimePartitions* time_partitions) {
  assert_set_gc_id();

  _shared_gc_info.set_sum_of_pauses(time_partitions->sum_of_pauses());
  _shared_gc_info.set_longest_pause(time_partitions->longest_pause());
  _shared_gc_info.set_end_timestamp(timestamp);

  send_phase_events(time_partitions);
  send_garbage_collection_event();
}

void GCTracer::report_gc_end(jlong timestamp, TimePartitions* time_partitions) {
  assert_set_gc_id();

  report_gc_end_impl(timestamp, time_partitions);

  _shared_gc_info.set_id(SharedGCInfo::UNSET_GCID);
}

void GCTracer::report_gc_reference_processing(const ReferenceProcessorStats& rps) const {
  assert_set_gc_id();

  send_reference_processing_event(REF_SOFT, rps.soft_count());
  send_reference_processing_event(REF_WEAK, rps.weak_count());
  send_reference_processing_event(REF_FINAL, rps.final_count());
  send_reference_processing_event(REF_PHANTOM, rps.phantom_count());
}

void GCTracer::report_gc_heap_summary(GCWhen::Type when, const GCHeapSummary& heap_summary, const PermGenSummary& perm_gen_summary) const {
  assert_set_gc_id();

  send_gc_heap_summary_event(when, heap_summary);
  send_perm_gen_summary_event(when, perm_gen_summary);
}

void YoungGCTracer::report_gc_end_impl(jlong timestamp, TimePartitions* time_partitions) {
  assert_set_gc_id();

  GCTracer::report_gc_end_impl(timestamp, time_partitions);
  send_young_gc_event();
}

void YoungGCTracer::report_promotion_failed(size_t size, uint count) {
  assert_set_gc_id();

  young_gc_info().register_promotion_failed();
  send_promotion_failed_event(size, count);
}


void OldGCTracer::report_gc_end_impl(jlong timestamp, TimePartitions* time_partitions) {
  assert_set_gc_id();

  GCTracer::report_gc_end_impl(timestamp, time_partitions);
  send_old_gc_event();
}

void ParallelOldTracer::report_gc_end_impl(jlong timestamp, TimePartitions* time_partitions) {
  assert_set_gc_id();

  OldGCTracer::report_gc_end_impl(timestamp, time_partitions);
  send_parallel_old_event();
}

void ParallelOldTracer::report_dense_prefix(void* dense_prefix) {
  assert_set_gc_id();

  _parallel_old_gc_info.report_dense_prefix(dense_prefix);
}

#ifndef SERIALGC
void G1NewTracer::report_yc_type(G1YCType type) {
  assert_set_gc_id();

  _g1_young_gc_info.set_type(type);
}

void G1NewTracer::report_gc_end_impl(jlong timestamp, TimePartitions* time_partitions) {
  assert_set_gc_id();

  YoungGCTracer::report_gc_end_impl(timestamp, time_partitions);
  send_g1_young_gc_event();
}
#endif