Mercurial > hg > graal-jvmci-8
view src/share/vm/services/runtimeService.cpp @ 3979:4dfb2df418f2
6484982: G1: process references during evacuation pauses
Summary: G1 now uses two reference processors - one is used by concurrent marking and the other is used by STW GCs (both full and incremental evacuation pauses). In an evacuation pause, the reference processor is embedded into the closures used to scan objects. Doing so causes causes reference objects to be 'discovered' by the reference processor. At the end of the evacuation pause, these discovered reference objects are processed - preserving (and copying) referent objects (and their reachable graphs) as appropriate.
Reviewed-by: ysr, jwilhelm, brutisso, stefank, tonyp
author | johnc |
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date | Thu, 22 Sep 2011 10:57:37 -0700 |
parents | f95d63e2154a |
children | 436b4a3231bf |
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/* * Copyright (c) 2003, 2010, 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" HS_DTRACE_PROBE_DECL(hs_private, safepoint__begin); HS_DTRACE_PROBE_DECL(hs_private, safepoint__end); 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; PerfCounter* RuntimeService::_thread_interrupt_signaled_count = NULL; PerfCounter* RuntimeService::_interrupted_before_count = NULL; PerfCounter* RuntimeService::_interrupted_during_count = NULL; 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); // I/O interruption related counters // thread signaling via os::interrupt() _thread_interrupt_signaled_count = PerfDataManager::create_counter(SUN_RT, "threadInterruptSignaled", PerfData::U_Events, CHECK); // OS_INTRPT via "check before" in _INTERRUPTIBLE _interrupted_before_count = PerfDataManager::create_counter(SUN_RT, "interruptedBeforeIO", PerfData::U_Events, CHECK); // OS_INTRPT via "check during" in _INTERRUPTIBLE _interrupted_during_count = PerfDataManager::create_counter(SUN_RT, "interruptedDuringIO", PerfData::U_Events, 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'; #ifdef KERNEL capabilities[1] = '1'; #endif // KERNEL PerfDataManager::create_string_constant(SUN_RT, "jvmCapabilities", capabilities, CHECK); } } void RuntimeService::record_safepoint_begin() { HS_DTRACE_PROBE(hs_private, safepoint__begin); // Print the time interval in which the app was executing if (PrintGCApplicationConcurrentTime) { 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(); 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()); } } void RuntimeService::record_safepoint_end() { HS_DTRACE_PROBE(hs_private, safepoint__end); // Print the time interval for which the app was stopped // during the current safepoint operation. if (PrintGCApplicationStoppedTime) { gclog_or_tty->print_cr("Total time for which application threads " "were stopped: %3.7f seconds", last_safepoint_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; } void RuntimeService::record_interrupted_before_count() { if (UsePerfData) { _interrupted_before_count->inc(); } } void RuntimeService::record_interrupted_during_count() { if (UsePerfData) { _interrupted_during_count->inc(); } } void RuntimeService::record_thread_interrupt_signaled_count() { if (UsePerfData) { _thread_interrupt_signaled_count->inc(); } }