Mercurial > hg > truffle
annotate src/cpu/sparc/vm/vm_version_sparc.hpp @ 10:28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
Summary: Use the same default number of GC threads as used by ParNewGC and ConcMarkSweepGC (i.e., the 5/8th rule).
Reviewed-by: ysr, tonyp
| author | jmasa |
|---|---|
| date | Fri, 22 Feb 2008 17:17:14 -0800 |
| parents | a61af66fc99e |
| children | d1605aabd0a1 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 * Copyright 1997-2007 Sun Microsystems, Inc. All Rights Reserved. | |
| 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
| 4 * | |
| 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 | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
| 19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
| 20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
| 21 * have any questions. | |
| 22 * | |
| 23 */ | |
| 24 | |
| 25 class VM_Version: public Abstract_VM_Version { | |
| 26 protected: | |
| 27 enum Feature_Flag { | |
| 28 v8_instructions = 0, | |
| 29 hardware_int_muldiv = 1, | |
| 30 hardware_fsmuld = 2, | |
| 31 v9_instructions = 3, | |
| 32 vis1_instructions = 4, | |
| 33 vis2_instructions = 5, | |
| 34 sun4v_instructions = 6 | |
| 35 }; | |
| 36 | |
| 37 enum Feature_Flag_Set { | |
| 38 unknown_m = 0, | |
| 39 all_features_m = -1, | |
| 40 | |
| 41 v8_instructions_m = 1 << v8_instructions, | |
| 42 hardware_int_muldiv_m = 1 << hardware_int_muldiv, | |
| 43 hardware_fsmuld_m = 1 << hardware_fsmuld, | |
| 44 v9_instructions_m = 1 << v9_instructions, | |
| 45 vis1_instructions_m = 1 << vis1_instructions, | |
| 46 vis2_instructions_m = 1 << vis2_instructions, | |
| 47 sun4v_m = 1 << sun4v_instructions, | |
| 48 | |
| 49 generic_v8_m = v8_instructions_m | hardware_int_muldiv_m | hardware_fsmuld_m, | |
| 50 generic_v9_m = generic_v8_m | v9_instructions_m | vis1_instructions_m, | |
| 51 ultra3_m = generic_v9_m | vis2_instructions_m, | |
| 52 | |
| 53 // Temporary until we have something more accurate | |
| 54 niagara1_unique_m = sun4v_m, | |
| 55 niagara1_m = generic_v9_m | niagara1_unique_m | |
| 56 }; | |
| 57 | |
| 58 static int _features; | |
| 59 static const char* _features_str; | |
| 60 | |
| 61 static void print_features(); | |
| 62 static int determine_features(); | |
| 63 static int platform_features(int features); | |
| 64 | |
| 65 static bool is_niagara1(int features) { return (features & niagara1_m) == niagara1_m; } | |
| 66 | |
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67 static int maximum_niagara1_processor_count() { return 32; } |
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68 // Returns true if the platform is in the niagara line and |
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69 // newer than the niagara1. |
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70 static bool is_niagara1_plus(); |
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71 |
| 0 | 72 public: |
| 73 // Initialization | |
| 74 static void initialize(); | |
| 75 | |
| 76 // Instruction support | |
| 77 static bool has_v8() { return (_features & v8_instructions_m) != 0; } | |
| 78 static bool has_v9() { return (_features & v9_instructions_m) != 0; } | |
| 79 static bool has_hardware_int_muldiv() { return (_features & hardware_int_muldiv_m) != 0; } | |
| 80 static bool has_hardware_fsmuld() { return (_features & hardware_fsmuld_m) != 0; } | |
| 81 static bool has_vis1() { return (_features & vis1_instructions_m) != 0; } | |
| 82 static bool has_vis2() { return (_features & vis2_instructions_m) != 0; } | |
| 83 | |
| 84 static bool supports_compare_and_exchange() | |
| 85 { return has_v9(); } | |
| 86 | |
| 87 static bool is_ultra3() { return (_features & ultra3_m) == ultra3_m; } | |
| 88 static bool is_sun4v() { return (_features & sun4v_m) != 0; } | |
| 89 static bool is_niagara1() { return is_niagara1(_features); } | |
| 90 | |
| 91 static bool has_fast_fxtof() { return has_v9() && !is_ultra3(); } | |
| 92 | |
| 93 static const char* cpu_features() { return _features_str; } | |
| 94 | |
| 95 static intx L1_data_cache_line_size() { | |
| 96 return 64; // default prefetch block size on sparc | |
| 97 } | |
| 98 | |
| 99 // Prefetch | |
| 100 static intx prefetch_copy_interval_in_bytes() { | |
| 101 intx interval = PrefetchCopyIntervalInBytes; | |
| 102 return interval >= 0 ? interval : (has_v9() ? 512 : 0); | |
| 103 } | |
| 104 static intx prefetch_scan_interval_in_bytes() { | |
| 105 intx interval = PrefetchScanIntervalInBytes; | |
| 106 return interval >= 0 ? interval : (has_v9() ? 512 : 0); | |
| 107 } | |
| 108 static intx prefetch_fields_ahead() { | |
| 109 intx count = PrefetchFieldsAhead; | |
| 110 return count >= 0 ? count : (is_ultra3() ? 1 : 0); | |
| 111 } | |
| 112 | |
| 113 static intx allocate_prefetch_distance() { | |
| 114 // This method should be called before allocate_prefetch_style(). | |
| 115 intx count = AllocatePrefetchDistance; | |
| 116 if (count < 0) { // default is not defined ? | |
| 117 count = 512; | |
| 118 } | |
| 119 return count; | |
| 120 } | |
| 121 static intx allocate_prefetch_style() { | |
| 122 assert(AllocatePrefetchStyle >= 0, "AllocatePrefetchStyle should be positive"); | |
| 123 // Return 0 if AllocatePrefetchDistance was not defined. | |
| 124 return AllocatePrefetchDistance > 0 ? AllocatePrefetchStyle : 0; | |
| 125 } | |
| 126 | |
| 127 // Legacy | |
| 128 static bool v8_instructions_work() { return has_v8() && !has_v9(); } | |
| 129 static bool v9_instructions_work() { return has_v9(); } | |
| 130 | |
| 131 // Assembler testing | |
| 132 static void allow_all(); | |
| 133 static void revert(); | |
| 134 | |
| 135 // Override the Abstract_VM_Version implementation. | |
| 136 static uint page_size_count() { return is_sun4v() ? 4 : 2; } | |
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137 |
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138 // Calculates the number of parallel threads |
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139 static unsigned int calc_parallel_worker_threads(); |
| 0 | 140 }; |