/*

 * Copyright (c) 2003, 2014, 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 "classfile/classLoader.hpp"

#include "services/attachListener.hpp"

#include "services/management.hpp"

#include "services/runtimeService.hpp"

#include "utilities/dtrace.hpp"

#include "utilities/exceptions.hpp"

#include "utilities/macros.hpp"

#if INCLUDE_MANAGEMENT

TimeStamp RuntimeService::_app_timer;

TimeStamp RuntimeService::_safepoint_timer;

PerfCounter*  RuntimeService::_sync_time_ticks = NULL;

PerfCounter*  RuntimeService::_total_safepoints = NULL;

PerfCounter*  RuntimeService::_safepoint_time_ticks = NULL;

PerfCounter*  RuntimeService::_application_time_ticks = NULL;

double RuntimeService::_last_safepoint_sync_time_sec = 0.0;

void RuntimeService::init() {

  // Make sure the VM version is initialized

  Abstract_VM_Version::initialize();

  if (UsePerfData) {

    EXCEPTION_MARK;

    _sync_time_ticks =

              PerfDataManager::create_counter(SUN_RT, "safepointSyncTime",

                                              PerfData::U_Ticks, CHECK);

    _total_safepoints =

              PerfDataManager::create_counter(SUN_RT, "safepoints",

                                              PerfData::U_Events, CHECK);

    _safepoint_time_ticks =

              PerfDataManager::create_counter(SUN_RT, "safepointTime",

                                              PerfData::U_Ticks, CHECK);

    _application_time_ticks =

              PerfDataManager::create_counter(SUN_RT, "applicationTime",

                                              PerfData::U_Ticks, CHECK);

    // create performance counters for jvm_version and its capabilities

    PerfDataManager::create_constant(SUN_RT, "jvmVersion", PerfData::U_None,

                                     (jlong) Abstract_VM_Version::jvm_version(), CHECK);

    // The capabilities counter is a binary representation of the VM capabilities in string.

    // This string respresentation simplifies the implementation of the client side

    // to parse the value.

    char capabilities[65];

    size_t len = sizeof(capabilities);

    memset((void*) capabilities, '0', len);

    capabilities[len-1] = '\0';

    capabilities[0] = AttachListener::is_attach_supported() ? '1' : '0';

#if INCLUDE_SERVICES

    capabilities[1] = '1';

#endif // INCLUDE_SERVICES

    PerfDataManager::create_string_constant(SUN_RT, "jvmCapabilities",

                                            capabilities, CHECK);

  }

}

void RuntimeService::record_safepoint_begin() {

  HS_PRIVATE_SAFEPOINT_BEGIN();

  // Print the time interval in which the app was executing

  if (PrintGCApplicationConcurrentTime && _app_timer.is_updated()) {

    gclog_or_tty->date_stamp(PrintGCDateStamps);

    gclog_or_tty->stamp(PrintGCTimeStamps);

    gclog_or_tty->print_cr("Application time: %3.7f seconds",

                                last_application_time_sec());

  }

  // update the time stamp to begin recording safepoint time

  _safepoint_timer.update();

  _last_safepoint_sync_time_sec = 0.0;

  if (UsePerfData) {

    _total_safepoints->inc();

    if (_app_timer.is_updated()) {

      _application_time_ticks->inc(_app_timer.ticks_since_update());

    }

  }

}

void RuntimeService::record_safepoint_synchronized() {

  if (UsePerfData) {

    _sync_time_ticks->inc(_safepoint_timer.ticks_since_update());

  }

  if (PrintGCApplicationStoppedTime) {

    _last_safepoint_sync_time_sec = last_safepoint_time_sec();

  }

}

void RuntimeService::record_safepoint_end() {

  HS_PRIVATE_SAFEPOINT_END();

  // Print the time interval for which the app was stopped

  // during the current safepoint operation.

  if (PrintGCApplicationStoppedTime) {

    gclog_or_tty->date_stamp(PrintGCDateStamps);

    gclog_or_tty->stamp(PrintGCTimeStamps);

    gclog_or_tty->print_cr("Total time for which application threads "

                           "were stopped: %3.7f seconds, "

                           "Stopping threads took: %3.7f seconds",

                           last_safepoint_time_sec(),

                           _last_safepoint_sync_time_sec);

  }

  // update the time stamp to begin recording app time

  _app_timer.update();

  if (UsePerfData) {

    _safepoint_time_ticks->inc(_safepoint_timer.ticks_since_update());

  }

}

void RuntimeService::record_application_start() {

  // update the time stamp to begin recording app time

  _app_timer.update();

}

// Don't need to record application end because we currently

// exit at a safepoint and record_safepoint_begin() handles updating

// the application time counter at VM exit.

jlong RuntimeService::safepoint_sync_time_ms() {

  return UsePerfData ?

    Management::ticks_to_ms(_sync_time_ticks->get_value()) : -1;

}

jlong RuntimeService::safepoint_count() {

  return UsePerfData ?

    _total_safepoints->get_value() : -1;

}

jlong RuntimeService::safepoint_time_ms() {

  return UsePerfData ?

    Management::ticks_to_ms(_safepoint_time_ticks->get_value()) : -1;

}

jlong RuntimeService::application_time_ms() {

  return UsePerfData ?

    Management::ticks_to_ms(_application_time_ticks->get_value()) : -1;

}

#endif // INCLUDE_MANAGEMENT