/* * Copyright (c) 2002, 2019, Oracle and/or its affiliates. All rights reserved. * Copyright (c) 2012, 2018 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_GLOBALS_PPC_HPP #define CPU_PPC_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, ShareVtableStubs, true); 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(bool, UseFastClassInitChecks, false); // not implemented #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, 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, \ "CPU Version: x for PowerX. Currently recognizes Power5 to " \ "Power8. Default is 0. Newer CPUs will be recognized as Power8.") \ \ 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, 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_GLOBALS_PPC_HPP