Mercurial > hg > graal-compiler
view src/share/vm/runtime/sweeper.hpp @ 10290:05a17f270c7e
8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo
Summary: Improve the output of G1PrintRegionLivenessInfo by adding a per-region remembered set size information column
Reviewed-by: jwilhelm, johnc
author | tschatzl |
---|---|
date | Thu, 16 May 2013 13:02:33 +0200 |
parents | 0cfa93c2fcc4 |
children | f2110083203d |
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/* * Copyright (c) 1997, 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. * */ #ifndef SHARE_VM_RUNTIME_SWEEPER_HPP #define SHARE_VM_RUNTIME_SWEEPER_HPP // An NmethodSweeper is an incremental cleaner for: // - cleanup inline caches // - reclamation of unreferences zombie nmethods // class NMethodSweeper : public AllStatic { static long _traversals; // Stack traversal count static nmethod* _current; // Current nmethod static int _seen; // Nof. nmethod we have currently processed in current pass of CodeCache static volatile int _invocations; // No. of invocations left until we are completed with this pass static volatile int _sweep_started; // Flag to control conc sweeper //The following are reset in scan_stacks and synchronized by the safepoint static bool _resweep; // Indicates that a change has happend and we want another sweep, // always checked and reset at a safepoint so memory will be in sync. static int _locked_seen; // Number of locked nmethods encountered during the scan static int _not_entrant_seen_on_stack; // Number of not entrant nmethod were are still on stack static jint _flush_token; // token that guards method flushing, making sure it is executed only once. // These are set during a flush, a VM-operation static long _last_flush_traversal_id; // trav number at last flush unloading static jlong _last_full_flush_time; // timestamp of last emergency unloading // These are synchronized by the _sweep_started token static int _highest_marked; // highest compile id dumped at last emergency unloading static int _dead_compile_ids; // number of compile ids that where not in the cache last flush static void process_nmethod(nmethod *nm); static void release_nmethod(nmethod* nm); static void log_sweep(const char* msg, const char* format = NULL, ...); static bool sweep_in_progress(); public: static long traversal_count() { return _traversals; } #ifdef ASSERT // Keep track of sweeper activity in the ring buffer static void record_sweep(nmethod* nm, int line); static void report_events(int id, address entry); static void report_events(); #endif static void scan_stacks(); // Invoked at the end of each safepoint static void sweep_code_cache(); // Concurrent part of sweep job static void possibly_sweep(); // Compiler threads call this to sweep static void notify(nmethod* nm) { // Request a new sweep of the code cache from the beginning. No // need to synchronize the setting of this flag since it only // changes to false at safepoint so we can never overwrite it with false. _resweep = true; } static void handle_full_code_cache(bool is_full); // Called by compilers who fail to allocate static void speculative_disconnect_nmethods(bool was_full); // Called by vm op to deal with alloc failure }; #endif // SHARE_VM_RUNTIME_SWEEPER_HPP