Mercurial > hg > graal-compiler
view src/share/vm/runtime/memprofiler.cpp @ 2149:7e37af9d69ef
7011379: G1: overly long concurrent marking cycles
Summary: This changeset introduces filtering of SATB buffers at the point when they are about to be enqueued. If this filtering clears enough entries on each buffer, the buffer can then be re-used and not enqueued. This cuts down the number of SATB buffers that need to be processed by the concurrent marking threads.
Reviewed-by: johnc, ysr
author | tonyp |
---|---|
date | Wed, 19 Jan 2011 09:35:17 -0500 |
parents | f95d63e2154a |
children | f08d439fab8c |
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/* * Copyright (c) 1998, 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/systemDictionary.hpp" #include "code/codeCache.hpp" #include "gc_interface/collectedHeap.inline.hpp" #include "interpreter/oopMapCache.hpp" #include "memory/generation.hpp" #include "memory/permGen.hpp" #include "memory/resourceArea.hpp" #include "runtime/handles.inline.hpp" #include "runtime/jniHandles.hpp" #include "runtime/memprofiler.hpp" #include "runtime/mutexLocker.hpp" #include "runtime/os.hpp" #include "runtime/task.hpp" #include "runtime/vmThread.hpp" #ifdef TARGET_OS_FAMILY_linux # include "thread_linux.inline.hpp" #endif #ifdef TARGET_OS_FAMILY_solaris # include "thread_solaris.inline.hpp" #endif #ifdef TARGET_OS_FAMILY_windows # include "thread_windows.inline.hpp" #endif #ifndef PRODUCT // -------------------------------------------------------- // MemProfilerTask class MemProfilerTask : public PeriodicTask { public: MemProfilerTask(int interval_time) : PeriodicTask(interval_time) {} void task(); }; void MemProfilerTask::task() { // Get thread lock to provide mutual exclusion, and so we can iterate safely over the thread list. MutexLocker mu(Threads_lock); MemProfiler::do_trace(); } //---------------------------------------------------------- // Implementation of MemProfiler MemProfilerTask* MemProfiler::_task = NULL; FILE* MemProfiler::_log_fp = NULL; bool MemProfiler::is_active() { return _task != NULL; } void MemProfiler::engage() { const char *log_name = "mprofile.log"; if (!is_active()) { // Create log file _log_fp = fopen(log_name , "w+"); if (_log_fp == NULL) { fatal(err_msg("MemProfiler: Cannot create log file: %s", log_name)); } fprintf(_log_fp, "MemProfiler: sizes are in Kb, time is in seconds since startup\n\n"); fprintf(_log_fp, " time, #thr, #cls, heap, heap, perm, perm, code, hndls, rescs, oopmp\n"); fprintf(_log_fp, " used, total, used, total, total, total, total, total\n"); fprintf(_log_fp, "--------------------------------------------------------------------------\n"); _task = new MemProfilerTask(MemProfilingInterval); _task->enroll(); } } void MemProfiler::disengage() { if (!is_active()) return; // Do one last trace at disengage time do_trace(); // Close logfile fprintf(_log_fp, "MemProfiler detached\n"); fclose(_log_fp); // remove MemProfilerTask assert(_task != NULL, "sanity check"); _task->disenroll(); delete _task; _task = NULL; } void MemProfiler::do_trace() { // Calculate thread local sizes size_t handles_memory_usage = VMThread::vm_thread()->handle_area()->size_in_bytes(); size_t resource_memory_usage = VMThread::vm_thread()->resource_area()->size_in_bytes(); JavaThread *cur = Threads::first(); while (cur != NULL) { handles_memory_usage += cur->handle_area()->size_in_bytes(); resource_memory_usage += cur->resource_area()->size_in_bytes(); cur = cur->next(); } // Print trace line in log fprintf(_log_fp, "%6.1f,%5d,%5d," UINTX_FORMAT_W(6) "," UINTX_FORMAT_W(6) "," UINTX_FORMAT_W(6) "," UINTX_FORMAT_W(6) ",", os::elapsedTime(), Threads::number_of_threads(), SystemDictionary::number_of_classes(), Universe::heap()->used() / K, Universe::heap()->capacity() / K, Universe::heap()->permanent_used() / HWperKB, Universe::heap()->permanent_capacity() / HWperKB); fprintf(_log_fp, UINTX_FORMAT_W(6) ",", CodeCache::capacity() / K); fprintf(_log_fp, UINTX_FORMAT_W(6) "," UINTX_FORMAT_W(6) ",%6ld\n", handles_memory_usage / K, resource_memory_usage / K, OopMapCache::memory_usage() / K); fflush(_log_fp); } #endif