Tue, 07 Jul 2009 14:23:00 -0400
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
Summary: Changing the behavior of -XX:+PrintHeapAtGC for G1 from printing lengthy, per-region information to instead printing a concise summary.
Reviewed-by: ysr, apetrusenko, jcoomes
duke@435 | 1 | /* |
xdono@631 | 2 | * Copyright 1997-2008 Sun Microsystems, Inc. All Rights Reserved. |
duke@435 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
duke@435 | 4 | * |
duke@435 | 5 | * This code is free software; you can redistribute it and/or modify it |
duke@435 | 6 | * under the terms of the GNU General Public License version 2 only, as |
duke@435 | 7 | * published by the Free Software Foundation. |
duke@435 | 8 | * |
duke@435 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
duke@435 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
duke@435 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
duke@435 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
duke@435 | 13 | * accompanied this code). |
duke@435 | 14 | * |
duke@435 | 15 | * You should have received a copy of the GNU General Public License version |
duke@435 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
duke@435 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
duke@435 | 18 | * |
duke@435 | 19 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
duke@435 | 20 | * CA 95054 USA or visit www.sun.com if you need additional information or |
duke@435 | 21 | * have any questions. |
duke@435 | 22 | * |
duke@435 | 23 | */ |
duke@435 | 24 | |
duke@435 | 25 | // VM_Version provides information about the VM. |
duke@435 | 26 | |
duke@435 | 27 | class Abstract_VM_Version: AllStatic { |
duke@435 | 28 | protected: |
duke@435 | 29 | friend class VMStructs; |
duke@435 | 30 | static const char* _s_vm_release; |
duke@435 | 31 | static const char* _s_internal_vm_info_string; |
duke@435 | 32 | // These are set by machine-dependent initializations |
duke@435 | 33 | static bool _supports_cx8; |
duke@435 | 34 | static unsigned int _logical_processors_per_package; |
duke@435 | 35 | static int _vm_major_version; |
duke@435 | 36 | static int _vm_minor_version; |
duke@435 | 37 | static int _vm_build_number; |
duke@435 | 38 | static bool _initialized; |
jmasa@445 | 39 | static int _parallel_worker_threads; |
jmasa@445 | 40 | static bool _parallel_worker_threads_initialized; |
jmasa@445 | 41 | |
jmasa@445 | 42 | static unsigned int nof_parallel_worker_threads(unsigned int num, |
jmasa@445 | 43 | unsigned int dem, |
jmasa@445 | 44 | unsigned int switch_pt); |
duke@435 | 45 | public: |
duke@435 | 46 | static void initialize(); |
duke@435 | 47 | |
duke@435 | 48 | // Name |
duke@435 | 49 | static const char* vm_name(); |
duke@435 | 50 | // Vendor |
duke@435 | 51 | static const char* vm_vendor(); |
duke@435 | 52 | // VM version information string printed by launcher (java -version) |
duke@435 | 53 | static const char* vm_info_string(); |
duke@435 | 54 | static const char* vm_release(); |
duke@435 | 55 | static const char* vm_platform_string(); |
duke@435 | 56 | |
duke@435 | 57 | static int vm_major_version() { assert(_initialized, "not initialized"); return _vm_major_version; } |
duke@435 | 58 | static int vm_minor_version() { assert(_initialized, "not initialized"); return _vm_minor_version; } |
duke@435 | 59 | static int vm_build_number() { assert(_initialized, "not initialized"); return _vm_build_number; } |
duke@435 | 60 | |
duke@435 | 61 | // Gets the jvm_version_info.jvm_version defined in jvm.h |
duke@435 | 62 | static unsigned int jvm_version(); |
duke@435 | 63 | |
duke@435 | 64 | // Internal version providing additional build information |
duke@435 | 65 | static const char* internal_vm_info_string(); |
duke@435 | 66 | |
duke@435 | 67 | // does HW support an 8-byte compare-exchange operation? |
duke@435 | 68 | static bool supports_cx8() {return _supports_cx8;} |
duke@435 | 69 | static unsigned int logical_processors_per_package() { |
duke@435 | 70 | return _logical_processors_per_package; |
duke@435 | 71 | } |
duke@435 | 72 | |
duke@435 | 73 | // Number of page sizes efficiently supported by the hardware. Most chips now |
duke@435 | 74 | // support two sizes, thus this default implementation. Processor-specific |
duke@435 | 75 | // subclasses should define new versions to hide this one as needed. Note |
duke@435 | 76 | // that the O/S may support more sizes, but at most this many are used. |
duke@435 | 77 | static uint page_size_count() { return 2; } |
jmasa@445 | 78 | |
jmasa@445 | 79 | // Returns the number of parallel threads to be used for VM |
jmasa@445 | 80 | // work. If that number has not been calculated, do so and |
jmasa@445 | 81 | // save it. Returns ParallelGCThreads if it is set on the |
jmasa@445 | 82 | // command line. |
jmasa@445 | 83 | static unsigned int parallel_worker_threads(); |
jmasa@445 | 84 | // Calculates and returns the number of parallel threads. May |
jmasa@445 | 85 | // be VM version specific. |
jmasa@445 | 86 | static unsigned int calc_parallel_worker_threads(); |
duke@435 | 87 | }; |