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/commandLineFlagRangeList.hpp" 29 #include "runtime/globals.hpp" 30 #include "utilities/defaultStream.hpp" 31 32 Flag::Error AliasLevelConstraintFunc(intx value, bool verbose) { 33 if ((value <= 1) && (Arguments::mode() == Arguments::_comp)) { 34 CommandLineError::print(verbose, 35 "AliasLevel (" INTX_FORMAT ") is not " 36 "compatible with -Xcomp \n", 37 value); 38 return Flag::VIOLATES_CONSTRAINT; 39 } else { 40 return Flag::SUCCESS; 41 } 42 } 43 44 /** 45 * Validate the minimum number of compiler threads needed to run the 46 * JVM. The following configurations are possible. 47 * 48 * 1) The JVM is build using an interpreter only. As a result, the minimum number of 49 * compiler threads is 0. 50 * 2) The JVM is build using the compiler(s) and tiered compilation is disabled. As 51 * a result, either C1 or C2 is used, so the minimum number of compiler threads is 1. 52 * 3) The JVM is build using the compiler(s) and tiered compilation is enabled. However, 53 * the option "TieredStopAtLevel < CompLevel_full_optimization". As a result, only 54 * C1 can be used, so the minimum number of compiler threads is 1. 55 * 4) The JVM is build using the compilers and tiered compilation is enabled. The option 56 * 'TieredStopAtLevel = CompLevel_full_optimization' (the default value). As a result, 57 * the minimum number of compiler threads is 2. 58 */ 59 Flag::Error CICompilerCountConstraintFunc(intx value, bool verbose) { 60 int min_number_of_compiler_threads = 0; 61 #if !defined(COMPILER1) && !defined(COMPILER2) && !defined(SHARK) && !INCLUDE_JVMCI 62 // case 1 63 #else 64 if (!TieredCompilation || (TieredStopAtLevel < CompLevel_full_optimization)) { 65 min_number_of_compiler_threads = 1; // case 2 or case 3 66 } else { 67 min_number_of_compiler_threads = 2; // case 4 (tiered) 68 } 69 #endif 70 71 // The default CICompilerCount's value is CI_COMPILER_COUNT. 72 // With a client VM, -XX:+TieredCompilation causes TieredCompilation 73 // to be true here (the option is validated later) and 74 // min_number_of_compiler_threads to exceed CI_COMPILER_COUNT. 75 min_number_of_compiler_threads = MIN2(min_number_of_compiler_threads, CI_COMPILER_COUNT); 76 77 if (value < (intx)min_number_of_compiler_threads) { 78 CommandLineError::print(verbose, 79 "CICompilerCount (" INTX_FORMAT ") must be " 80 "at least %d \n", 81 value, min_number_of_compiler_threads); 82 return Flag::VIOLATES_CONSTRAINT; 83 } else { 84 return Flag::SUCCESS; 85 } 86 }