| /* |
| * Copyright (c) 2002, 2020, Oracle and/or its affiliates. All rights reserved. |
| * Copyright (c) 2012, 2020 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_PPC_VM_GLOBALS_PPC_HPP |
| #define CPU_PPC_VM_GLOBALS_PPC_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) |
| |
| 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 DEFAULT_STACK_YELLOW_PAGES (2) |
| #define DEFAULT_STACK_RED_PAGES (1) |
| // Java_java_net_SocketOutputStream_socketWrite0() uses a 64k buffer on the |
| // stack if compiled for unix and LP64. 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 (3 DEBUG_ONLY(+1)) |
| #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); |
| |
| // Use large code-entry alignment. |
| define_pd_global(uintx, CodeCacheSegmentSize, 128); |
| define_pd_global(intx, CodeEntryAlignment, 128); |
| define_pd_global(intx, OptoLoopAlignment, 16); |
| define_pd_global(intx, InlineFrequencyCount, 100); |
| define_pd_global(intx, InlineSmallCode, 1500); |
| |
| // Flags for template interpreter. |
| define_pd_global(bool, RewriteBytecodes, true); |
| define_pd_global(bool, RewriteFrequentPairs, true); |
| |
| define_pd_global(bool, UseMembar, true); |
| |
| 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); |
| |
| // 2x unrolled loop is shorter with more than 9 HeapWords. |
| define_pd_global(intx, InitArrayShortSize, 9*BytesPerLong); |
| |
| define_pd_global(bool, ThreadLocalHandshakes, true); |
| |
| // Platform dependent flag handling: flags only defined on this platform. |
| #define ARCH_FLAGS(develop, \ |
| product, \ |
| diagnostic, \ |
| experimental, \ |
| notproduct, \ |
| range, \ |
| constraint, \ |
| writeable) \ |
| \ |
| product(uintx, PowerArchitecturePPC64, 0, \ |
| "Specify the PowerPC family version in use. If not provided, " \ |
| "HotSpot will determine it automatically. Host family version " \ |
| "is the maximum value allowed (instructions are not emulated).") \ |
| \ |
| product(bool, SuperwordUseVSX, false, \ |
| "Use Power8 VSX instructions for superword optimization.") \ |
| \ |
| /* 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.") \ |
| \ |
| /* Power 8: Configure Data Stream Control Register. */ \ |
| product(uint64_t,DSCR_PPC64, (uintx)-1, \ |
| "Power8 or later: Specify encoded value for Data Stream Control " \ |
| "Register") \ |
| product(uint64_t,DSCR_DPFD_PPC64, 8, \ |
| "Power8 or later: DPFD (default prefetch depth) value of the " \ |
| "Data Stream Control Register." \ |
| " 0: hardware default, 1: none, 2-7: min-max, 8: don't touch") \ |
| product(uint64_t,DSCR_URG_PPC64, 8, \ |
| "Power8 or later: URG (depth attainment urgency) value of the " \ |
| "Data Stream Control Register." \ |
| " 0: hardware default, 1: none, 2-7: min-max, 8: don't touch") \ |
| \ |
| product(bool, UseLoadInstructionsForStackBangingPPC64, false, \ |
| "Use load instructions for stack banging.") \ |
| \ |
| /* special instructions */ \ |
| product(bool, UseByteReverseInstructions, false, \ |
| "Use byte reverse instructions.") \ |
| \ |
| product(bool, UseCountLeadingZerosInstructionsPPC64, true, \ |
| "Use count leading zeros instructions.") \ |
| \ |
| product(bool, UseCountTrailingZerosInstructionsPPC64, false, \ |
| "Use count trailing zeros instructions.") \ |
| \ |
| product(bool, UseExtendedLoadAndReserveInstructionsPPC64, false, \ |
| "Use extended versions of load-and-reserve instructions.") \ |
| \ |
| product(bool, UseRotateAndMaskInstructionsPPC64, true, \ |
| "Use rotate and mask instructions.") \ |
| \ |
| product(bool, UseStaticBranchPredictionInCompareAndSwapPPC64, true, \ |
| "Use static branch prediction hints in CAS operations.") \ |
| product(bool, UseStaticBranchPredictionForUncommonPathsPPC64, false, \ |
| "Use static branch prediction hints for uncommon paths.") \ |
| \ |
| product(bool, UsePower6SchedulerPPC64, false, \ |
| "Use Power6 Scheduler.") \ |
| \ |
| product(bool, InsertEndGroupPPC64, false, \ |
| "Insert EndGroup instructions to optimize for Power6.") \ |
| \ |
| /* Trap based checks. */ \ |
| /* Trap based checks use the ppc trap instructions to check certain */ \ |
| /* conditions. This instruction raises a SIGTRAP caught by the */ \ |
| /* exception handler of the VM. */ \ |
| product(bool, UseSIGTRAP, true, \ |
| "Allow trap instructions that make use of SIGTRAP. Use this to " \ |
| "switch off all optimizations requiring SIGTRAP.") \ |
| product(bool, TrapBasedICMissChecks, true, \ |
| "Raise and handle SIGTRAP if inline cache miss detected.") \ |
| product(bool, TrapBasedNotEntrantChecks, true, \ |
| "Raise and handle SIGTRAP if calling not entrant or zombie" \ |
| " method.") \ |
| product(bool, TraceTraps, false, "Trace all traps the signal handler" \ |
| "handles.") \ |
| \ |
| product(bool, ZapMemory, false, "Write 0x0101... to empty memory." \ |
| " Use this to ease debugging.") \ |
| \ |
| /* Use Restricted Transactional Memory for lock elision */ \ |
| product(bool, UseRTMLocking, false, \ |
| "Enable RTM lock eliding for inflated locks in compiled code") \ |
| \ |
| experimental(bool, UseRTMForStackLocks, false, \ |
| "Enable RTM lock eliding for stack locks in compiled code") \ |
| \ |
| product(bool, UseRTMDeopt, false, \ |
| "Perform deopt and recompilation based on RTM abort ratio") \ |
| \ |
| product(int, RTMRetryCount, 5, \ |
| "Number of RTM retries on lock abort or busy") \ |
| range(0, max_jint) \ |
| \ |
| experimental(int, RTMSpinLoopCount, 100, \ |
| "Spin count for lock to become free before RTM retry") \ |
| range(0, 32767) /* immediate operand limit on ppc */ \ |
| \ |
| experimental(int, RTMAbortThreshold, 1000, \ |
| "Calculate abort ratio after this number of aborts") \ |
| range(0, max_jint) \ |
| \ |
| experimental(int, RTMLockingThreshold, 10000, \ |
| "Lock count at which to do RTM lock eliding without " \ |
| "abort ratio calculation") \ |
| range(0, max_jint) \ |
| \ |
| experimental(int, RTMAbortRatio, 50, \ |
| "Lock abort ratio at which to stop use RTM lock eliding") \ |
| range(0, 100) /* natural range */ \ |
| \ |
| experimental(int, RTMTotalCountIncrRate, 64, \ |
| "Increment total RTM attempted lock count once every n times") \ |
| range(1, 32767) /* immediate operand limit on ppc */ \ |
| constraint(RTMTotalCountIncrRateConstraintFunc,AfterErgo) \ |
| \ |
| experimental(intx, RTMLockingCalculationDelay, 0, \ |
| "Number of milliseconds to wait before start calculating aborts " \ |
| "for RTM locking") \ |
| \ |
| experimental(bool, UseRTMXendForLockBusy, true, \ |
| "Use RTM Xend instead of Xabort when lock busy") \ |
| |
| #endif // CPU_PPC_VM_GLOBALS_PPC_HPP |
