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comparison src/share/vm/classfile/systemDictionary.hpp @ 4864:b2cd0ee8f778

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7114376: Make system dictionary hashtable bucket array size configurable Summary: 7u4 new experimental flag -XX:PredictedClassLoadedCount=# Reviewed-by: dholmes, phh, dcubed
author acorn
date Mon, 30 Jan 2012 23:27:30 -0500
parents e6b1331a51d2
children 33df1aeaebbf 8b0a4867acf0
comparison
equal deleted inserted replaced
4863:d96c130c9399 4864:b2cd0ee8f778
1 /* 1 /*
2 * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved. 2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 * 4 *
5 * This code is free software; you can redistribute it and/or modify it 5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as 6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. 7 * published by the Free Software Foundation.
343 static void placeholders_do(OopClosure* blk); 343 static void placeholders_do(OopClosure* blk);
344 344
345 // Unload (that is, break root links to) all unmarked classes and 345 // Unload (that is, break root links to) all unmarked classes and
346 // loaders. Returns "true" iff something was unloaded. 346 // loaders. Returns "true" iff something was unloaded.
347 static bool do_unloading(BoolObjectClosure* is_alive); 347 static bool do_unloading(BoolObjectClosure* is_alive);
348
349 static int calculate_systemdictionary_size(int loadedclasses);
348 350
349 // Applies "f->do_oop" to all root oops in the system dictionary. 351 // Applies "f->do_oop" to all root oops in the system dictionary.
350 static void oops_do(OopClosure* f); 352 static void oops_do(OopClosure* f);
351 353
352 // System loader lock 354 // System loader lock
536 538
537 enum Constants { 539 enum Constants {
538 _loader_constraint_size = 107, // number of entries in constraint table 540 _loader_constraint_size = 107, // number of entries in constraint table
539 _resolution_error_size = 107, // number of entries in resolution error table 541 _resolution_error_size = 107, // number of entries in resolution error table
540 _invoke_method_size = 139, // number of entries in invoke method table 542 _invoke_method_size = 139, // number of entries in invoke method table
541 _nof_buckets = 1009 // number of buckets in hash table 543 _nof_buckets = 1009, // number of buckets in hash table for placeholders
544 _old_default_sdsize = 1009, // backward compat for system dictionary size
545 _prime_array_size = 8, // array of primes for system dictionary size
546 _average_depth_goal = 3 // goal for lookup length
542 }; 547 };
543 548
544 549
545 // Static variables 550 // Static variables
551
552 // hashtable sizes for system dictionary to allow growth
553 // prime numbers for system dictionary size
554 static int _sdgeneration;
555 static const int _primelist[_prime_array_size];
546 556
547 // Hashtable holding loaded classes. 557 // Hashtable holding loaded classes.
548 static Dictionary* _dictionary; 558 static Dictionary* _dictionary;
549 559
550 // Hashtable holding placeholders for classes being loaded. 560 // Hashtable holding placeholders for classes being loaded.