hotspot/src/cpu/ppc/vm/globals_ppc.hpp
author dholmes
Mon, 15 Feb 2016 05:54:59 -0500
changeset 36099 bb0cc62ab037
parent 35594 cc13089c6327
child 36307 9f5f62a43577
permissions -rw-r--r--
8147379: Investigate if ConvertSleepToYield still should be false by default on Sparc Reviewed-by: dcubed, sjohanss
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/*
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 * Copyright (c) 2002, 2016, Oracle and/or its affiliates. All rights reserved.
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 * Copyright (c) 2012, 2015 SAP SE. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 *
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 */
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#ifndef CPU_PPC_VM_GLOBALS_PPC_HPP
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#define CPU_PPC_VM_GLOBALS_PPC_HPP
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#include "utilities/globalDefinitions.hpp"
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#include "utilities/macros.hpp"
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// Sets the default values for platform dependent flags used by the runtime system.
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// (see globals.hpp)
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define_pd_global(bool, ShareVtableStubs,      false); // Improves performance markedly for mtrt and compress.
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define_pd_global(bool, NeedsDeoptSuspend,     false); // Only register window machines need this.
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define_pd_global(bool, ImplicitNullChecks,    true);  // Generate code for implicit null checks.
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define_pd_global(bool, TrapBasedNullChecks,   true);
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define_pd_global(bool, UncommonNullCast,      true);  // Uncommon-trap NULLs passed to check cast.
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#define DEFAULT_STACK_YELLOW_PAGES (6)
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#define DEFAULT_STACK_RED_PAGES (1)
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#define DEFAULT_STACK_SHADOW_PAGES (6 DEBUG_ONLY(+2))
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#define DEFAULT_STACK_RESERVED_PAGES (0)
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#define MIN_STACK_YELLOW_PAGES DEFAULT_STACK_YELLOW_PAGES
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#define MIN_STACK_RED_PAGES DEFAULT_STACK_RED_PAGES
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#define MIN_STACK_SHADOW_PAGES (3 DEBUG_ONLY(+1))
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#define MIN_STACK_RESERVED_PAGES (0)
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define_pd_global(intx, StackYellowPages,      DEFAULT_STACK_YELLOW_PAGES);
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define_pd_global(intx, StackRedPages,         DEFAULT_STACK_RED_PAGES);
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define_pd_global(intx, StackShadowPages,      DEFAULT_STACK_SHADOW_PAGES);
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define_pd_global(intx, StackReservedPages,    DEFAULT_STACK_RESERVED_PAGES);
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// Use large code-entry alignment.
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define_pd_global(intx, CodeEntryAlignment,    128);
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define_pd_global(intx, OptoLoopAlignment,     16);
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define_pd_global(intx, InlineFrequencyCount,  100);
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define_pd_global(intx, InlineSmallCode,       1500);
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// Flags for template interpreter.
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define_pd_global(bool, RewriteBytecodes,      true);
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define_pd_global(bool, RewriteFrequentPairs,  true);
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define_pd_global(bool, UseMembar,             false);
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define_pd_global(bool, PreserveFramePointer,  false);
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// GC Ergo Flags
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define_pd_global(size_t, CMSYoungGenPerWorker, 16*M);  // Default max size of CMS young gen, per GC worker thread.
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define_pd_global(uintx, TypeProfileLevel, 111);
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// No performance work done here yet.
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define_pd_global(bool, CompactStrings, false);
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// Platform dependent flag handling: flags only defined on this platform.
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#define ARCH_FLAGS(develop, product, diagnostic, experimental, notproduct, range, constraint)  \
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                                                                            \
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  /* Load poll address from thread. This is used to implement per-thread */ \
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  /* safepoints on platforms != IA64. */                                    \
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  product(bool, LoadPollAddressFromThread, false,                           \
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          "Load polling page address from thread object (required for "     \
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          "per-thread safepoints on platforms != IA64)")                    \
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                                                                            \
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  product(uintx, PowerArchitecturePPC64, 0,                                 \
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          "CPU Version: x for PowerX. Currently recognizes Power5 to "      \
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          "Power8. Default is 0. Newer CPUs will be recognized as Power8.") \
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                                                                            \
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  /* Reoptimize code-sequences of calls at runtime, e.g. replace an */      \
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  /* indirect call by a direct call.                                */      \
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  product(bool, ReoptimizeCallSequences, true,                              \
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          "Reoptimize code-sequences of calls at runtime.")                 \
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                                                                            \
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  /* Power 8: Configure Data Stream Control Register. */                    \
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  product(uint64_t,DSCR_PPC64, (uintx)-1,                                   \
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          "Power8 or later: Specify encoded value for Data Stream Control " \
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          "Register")                                                       \
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  product(uint64_t,DSCR_DPFD_PPC64, 8,                                      \
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          "Power8 or later: DPFD (default prefetch depth) value of the "    \
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          "Data Stream Control Register."                                   \
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          " 0: hardware default, 1: none, 2-7: min-max, 8: don't touch")    \
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  product(uint64_t,DSCR_URG_PPC64, 8,                                       \
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          "Power8 or later: URG (depth attainment urgency) value of the "   \
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          "Data Stream Control Register."                                   \
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          " 0: hardware default, 1: none, 2-7: min-max, 8: don't touch")    \
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                                                                            \
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  product(bool, UseLoadInstructionsForStackBangingPPC64, false,             \
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          "Use load instructions for stack banging.")                       \
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                                                                            \
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  /* special instructions */                                                \
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                                                                            \
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  product(bool, UseCountLeadingZerosInstructionsPPC64, true,                \
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          "Use count leading zeros instructions.")                          \
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                                                                            \
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  product(bool, UseExtendedLoadAndReserveInstructionsPPC64, false,          \
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          "Use extended versions of load-and-reserve instructions.")        \
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                                                                            \
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  product(bool, UseRotateAndMaskInstructionsPPC64, true,                    \
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          "Use rotate and mask instructions.")                              \
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                                                                            \
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  product(bool, UseStaticBranchPredictionInCompareAndSwapPPC64, true,       \
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          "Use static branch prediction hints in CAS operations.")          \
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  product(bool, UseStaticBranchPredictionForUncommonPathsPPC64, false,      \
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          "Use static branch prediction hints for uncommon paths.")         \
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                                                                            \
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  product(bool, UsePower6SchedulerPPC64, false,                             \
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          "Use Power6 Scheduler.")                                          \
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                                                                            \
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  product(bool, InsertEndGroupPPC64, false,                                 \
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          "Insert EndGroup instructions to optimize for Power6.")           \
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                                                                            \
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  /* Trap based checks. */                                                  \
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  /* Trap based checks use the ppc trap instructions to check certain */    \
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  /* conditions. This instruction raises a SIGTRAP caught by the      */    \
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  /* exception handler of the VM.                                     */    \
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  product(bool, UseSIGTRAP, true,                                           \
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          "Allow trap instructions that make use of SIGTRAP. Use this to "  \
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          "switch off all optimizations requiring SIGTRAP.")                \
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  product(bool, TrapBasedICMissChecks, true,                                \
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          "Raise and handle SIGTRAP if inline cache miss detected.")        \
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  product(bool, TrapBasedNotEntrantChecks, true,                            \
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          "Raise and handle SIGTRAP if calling not entrant or zombie"       \
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          " method.")                                                       \
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  product(bool, TraceTraps, false, "Trace all traps the signal handler"     \
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          "handles.")                                                       \
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                                                                            \
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  product(bool, ZapMemory, false, "Write 0x0101... to empty memory."        \
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          " Use this to ease debugging.")                                   \
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                                                                            \
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  /* Use Restricted Transactional Memory for lock eliding */                \
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  product(bool, UseRTMLocking, false,                                       \
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          "Enable RTM lock eliding for inflated locks in compiled code")    \
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                                                                            \
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  experimental(bool, UseRTMForStackLocks, false,                            \
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          "Enable RTM lock eliding for stack locks in compiled code")       \
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                                                                            \
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  product(bool, UseRTMDeopt, false,                                         \
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          "Perform deopt and recompilation based on RTM abort ratio")       \
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                                                                            \
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  product(uintx, RTMRetryCount, 5,                                          \
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          "Number of RTM retries on lock abort or busy")                    \
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                                                                            \
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  experimental(intx, RTMSpinLoopCount, 100,                                 \
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          "Spin count for lock to become free before RTM retry")            \
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                                                                            \
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  experimental(intx, RTMAbortThreshold, 1000,                               \
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          "Calculate abort ratio after this number of aborts")              \
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                                                                            \
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  experimental(intx, RTMLockingThreshold, 10000,                            \
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          "Lock count at which to do RTM lock eliding without "             \
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          "abort ratio calculation")                                        \
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                                                                            \
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  experimental(intx, RTMAbortRatio, 50,                                     \
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          "Lock abort ratio at which to stop use RTM lock eliding")         \
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                                                                            \
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  experimental(intx, RTMTotalCountIncrRate, 64,                             \
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          "Increment total RTM attempted lock count once every n times")    \
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                                                                            \
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  experimental(intx, RTMLockingCalculationDelay, 0,                         \
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          "Number of milliseconds to wait before start calculating aborts " \
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          "for RTM locking")                                                \
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                                                                            \
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  experimental(bool, UseRTMXendForLockBusy, true,                           \
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          "Use RTM Xend instead of Xabort when lock busy")                  \
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#endif // CPU_PPC_VM_GLOBALS_PPC_HPP