1 /* 2 * Copyright (c) 2015, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "runtime/arguments.hpp" 27 #include "runtime/commandLineFlagConstraintsCompiler.hpp" 28 #include "runtime/globals.hpp" 29 #include "utilities/defaultStream.hpp" 30 31 Flag::Error AliasLevelConstraintFunc(bool verbose, intx* value) { 32 if ((*value <= 1) && (Arguments::mode() == Arguments::_comp)) { 33 if (verbose == true) { 34 jio_fprintf(defaultStream::error_stream(), 35 "AliasLevel (" INTX_FORMAT ") is not compatible " 36 "with -Xcomp \n", 37 *value); 38 } 39 return Flag::VIOLATES_CONSTRAINT; 40 } else { 41 return Flag::SUCCESS; 42 } 43 } 44 45 /** 46 * Validate the minimum number of compiler threads needed to run the 47 * JVM. The following configurations are possible. 48 * 49 * 1) The JVM is build using an interpreter only. As a result, the minimum number of 50 * compiler threads is 0. 51 * 2) The JVM is build using the compiler(s) and tiered compilation is disabled. As 52 * a result, either C1 or C2 is used, so the minimum number of compiler threads is 1. 53 * 3) The JVM is build using the compiler(s) and tiered compilation is enabled. However, 54 * the option "TieredStopAtLevel < CompLevel_full_optimization". As a result, only 55 * C1 can be used, so the minimum number of compiler threads is 1. 56 * 4) The JVM is build using the compilers and tiered compilation is enabled. The option 57 * 'TieredStopAtLevel = CompLevel_full_optimization' (the default value). As a result, 58 * the minimum number of compiler threads is 2. 59 */ 60 Flag::Error CICompilerCountConstraintFunc(bool verbose, intx* value) { 61 int min_number_of_compiler_threads = 0; 62 #if !defined(COMPILER1) && !defined(COMPILER2) && !defined(SHARK) 63 // case 1 64 #else 65 if (!TieredCompilation || (TieredStopAtLevel < CompLevel_full_optimization)) { 66 min_number_of_compiler_threads = 1; // case 2 or case 3 67 } else { 68 min_number_of_compiler_threads = 2; // case 4 (tiered) 69 } 70 #endif 71 72 // The default CICompilerCount's value is CI_COMPILER_COUNT. 73 assert(min_number_of_compiler_threads <= CI_COMPILER_COUNT, "minimum should be less or equal default number"); 74 75 if (*value < (intx)min_number_of_compiler_threads) { 76 if (verbose == true) { 77 jio_fprintf(defaultStream::error_stream(), 78 "CICompilerCount=" INTX_FORMAT " must be at least %d \n", 79 *value, min_number_of_compiler_threads); 80 } 81 return Flag::VIOLATES_CONSTRAINT; 82 } else { 83 return Flag::SUCCESS; 84 } 85 }