src/share/vm/runtime/sweeper.hpp
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rev 4773 : 8005849: JEP 167: Event-Based JVM Tracing
Reviewed-by: acorn, coleenp, sla
Contributed-by: Karen Kinnear <karen.kinnear@oracle.com>, Bengt Rutisson <bengt.rutisson@oracle.com>, Calvin Cheung <calvin.cheung@oracle.com>, Erik Gahlin <erik.gahlin@oracle.com>, Erik Helin <erik.helin@oracle.com>, Jesper Wilhelmsson <jesper.wilhelmsson@oracle.com>, Keith McGuigan <keith.mcguigan@oracle.com>, Mattias Tobiasson <mattias.tobiasson@oracle.com>, Markus Gronlund <markus.gronlund@oracle.com>, Mikael Auno <mikael.auno@oracle.com>, Nils Eliasson <nils.eliasson@oracle.com>, Nils Loodin <nils.loodin@oracle.com>, Rickard Backman <rickard.backman@oracle.com>, Staffan Larsen <staffan.larsen@oracle.com>, Stefan Karlsson <stefan.karlsson@oracle.com>, Yekaterina Kantserova <yekaterina.kantserova@oracle.com>
@@ -1,7 +1,7 @@
/*
- * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2013, 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.
@@ -29,13 +29,16 @@
// - cleanup inline caches
// - reclamation of unreferences zombie nmethods
//
class NMethodSweeper : public AllStatic {
- static long _traversals; // Stack traversal count
+ static long _traversals; // Stack scan count, also sweep ID.
static nmethod* _current; // Current nmethod
static int _seen; // Nof. nmethod we have currently processed in current pass of CodeCache
+ static int _flushed_count; // Nof. nmethods flushed in current sweep
+ static int _zombified_count; // Nof. nmethods made zombie in current sweep
+ static int _marked_count; // Nof. nmethods marked for reclaim in current sweep
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
@@ -51,18 +54,35 @@
// 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
+ // Stat counters
+ static int _number_of_flushes; // Total of full traversals caused by full cache
+ static int _total_nof_methods_reclaimed; // Accumulated nof methods flushed
+ static jlong _total_time_sweeping; // Accumulated time sweeping
+ static jlong _total_time_this_sweep; // Total time this sweep
+ static jlong _peak_sweep_time; // Peak time for a full sweep
+ static jlong _peak_sweep_fraction_time; // Peak time sweeping one fraction
+ static jlong _total_disconnect_time; // Total time cleaning code mem
+ static jlong _peak_disconnect_time; // Peak time cleaning code mem
+
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; }
+ static int number_of_flushes() { return _number_of_flushes; }
+ static int total_nof_methods_reclaimed() { return _total_nof_methods_reclaimed; }
+ static jlong total_time_sweeping() { return _total_time_sweeping; }
+ static jlong peak_sweep_time() { return _peak_sweep_time; }
+ static jlong peak_sweep_fraction_time() { return _peak_sweep_fraction_time; }
+ static jlong total_disconnect_time() { return _total_disconnect_time; }
+ static jlong peak_disconnect_time() { return _peak_disconnect_time; }
#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);