| /* |
| * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved. |
| * Copyright (c) 2016 SAP SE. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| #ifndef CPU_S390_VM_GLOBALS_S390_HPP |
| #define CPU_S390_VM_GLOBALS_S390_HPP |
| |
| #include "utilities/globalDefinitions.hpp" |
| #include "utilities/macros.hpp" |
| |
| // Sets the default values for platform dependent flags used by the runtime system. |
| // (see globals.hpp) |
| // Sorted according to sparc. |
| |
| // z/Architecture remembers branch targets, so don't share vtables. |
| define_pd_global(bool, ShareVtableStubs, false); |
| define_pd_global(bool, NeedsDeoptSuspend, false); // Only register window machines need this. |
| |
| define_pd_global(bool, ImplicitNullChecks, true); // Generate code for implicit null checks. |
| define_pd_global(bool, TrapBasedNullChecks, true); |
| define_pd_global(bool, UncommonNullCast, true); // Uncommon-trap NULLs passed to check cast. |
| |
| define_pd_global(uintx, CodeCacheSegmentSize, 256); |
| // This shall be at least 32 for proper branch target alignment. |
| // Ideally, this is 256 (cache line size). This keeps code end data |
| // on separate lines. But we reduced it to 64 since 256 increased |
| // code size significantly by padding nops between IVC and second UEP. |
| define_pd_global(intx, CodeEntryAlignment, 64); |
| define_pd_global(intx, OptoLoopAlignment, 2); |
| define_pd_global(intx, InlineFrequencyCount, 100); |
| define_pd_global(intx, InlineSmallCode, 2000); |
| |
| #define DEFAULT_STACK_YELLOW_PAGES (2) |
| #define DEFAULT_STACK_RED_PAGES (1) |
| // Java_java_net_SocketOutputStream_socketWrite0() uses a 64k buffer on the |
| // stack. To pass stack overflow tests we need 20 shadow pages. |
| #define DEFAULT_STACK_SHADOW_PAGES (20 DEBUG_ONLY(+2)) |
| #define DEFAULT_STACK_RESERVED_PAGES (1) |
| |
| #define MIN_STACK_YELLOW_PAGES DEFAULT_STACK_YELLOW_PAGES |
| #define MIN_STACK_RED_PAGES DEFAULT_STACK_RED_PAGES |
| #define MIN_STACK_SHADOW_PAGES DEFAULT_STACK_SHADOW_PAGES |
| #define MIN_STACK_RESERVED_PAGES (0) |
| |
| define_pd_global(intx, StackYellowPages, DEFAULT_STACK_YELLOW_PAGES); |
| define_pd_global(intx, StackRedPages, DEFAULT_STACK_RED_PAGES); |
| define_pd_global(intx, StackShadowPages, DEFAULT_STACK_SHADOW_PAGES); |
| define_pd_global(intx, StackReservedPages, DEFAULT_STACK_RESERVED_PAGES); |
| |
| define_pd_global(bool, RewriteBytecodes, true); |
| define_pd_global(bool, RewriteFrequentPairs, true); |
| |
| define_pd_global(bool, UseMembar, false); |
| |
| define_pd_global(bool, PreserveFramePointer, false); |
| |
| // GC Ergo Flags |
| define_pd_global(size_t, CMSYoungGenPerWorker, 16*M); // Default max size of CMS young gen, per GC worker thread. |
| |
| define_pd_global(uintx, TypeProfileLevel, 111); |
| |
| define_pd_global(bool, CompactStrings, true); |
| |
| // 8146801 (Short Array Allocation): No performance work done here yet. |
| define_pd_global(intx, InitArrayShortSize, 1*BytesPerLong); |
| |
| #define ARCH_FLAGS(develop, product, diagnostic, experimental, notproduct, range, constraint, writeable) \ |
| \ |
| /* Reoptimize code-sequences of calls at runtime, e.g. replace an */ \ |
| /* indirect call by a direct call. */ \ |
| product(bool, ReoptimizeCallSequences, true, \ |
| "Reoptimize code-sequences of calls at runtime.") \ |
| \ |
| product(bool, UseByteReverseInstruction, true, \ |
| "Use byte reverse instruction.") \ |
| \ |
| product(bool, ExpandLoadingBaseDecode, true, "Expand the assembler " \ |
| "instruction required to load the base from DecodeN nodes during " \ |
| "matching.") \ |
| product(bool, ExpandLoadingBaseDecode_NN, true, "Expand the assembler " \ |
| "instruction required to load the base from DecodeN_NN nodes " \ |
| "during matching.") \ |
| product(bool, ExpandLoadingBaseEncode, true, "Expand the assembler " \ |
| "instruction required to load the base from EncodeP nodes during " \ |
| "matching.") \ |
| product(bool, ExpandLoadingBaseEncode_NN, true, "Expand the assembler " \ |
| "instruction required to load the base from EncodeP_NN nodes " \ |
| "during matching.") \ |
| \ |
| /* Seems to pay off with 2 pages already. */ \ |
| product(size_t, MVCLEThreshold, +2*(4*K), \ |
| "Threshold above which page-aligned MVCLE copy/init is used.") \ |
| \ |
| product(bool, PreferLAoverADD, false, \ |
| "Use LA/LAY instructions over ADD instructions (z/Architecture).") \ |
| \ |
| develop(bool, ZapEmptyStackFields, false, "Write 0x0101... to empty stack" \ |
| " fields. Use this to ease stack debugging.") \ |
| \ |
| product(bool, TraceTraps, false, "Trace all traps the signal handler" \ |
| "handles.") |
| |
| #endif // CPU_S390_VM_GLOBALS_S390_HPP |