hotspot/src/cpu/ppc/vm/globals_ppc.hpp - platform/libcore - Git at Google

 /*
  * Copyright (c) 2002, 2016, Oracle and/or its affiliates. All rights reserved.
  * Copyright (c) 2012, 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_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, ShareVtableStubs,      false); // Improves performance markedly for mtrt and compress.
 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 (6)
 #define DEFAULT_STACK_RED_PAGES (1)
 #define DEFAULT_STACK_SHADOW_PAGES (6 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(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,             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);

 define_pd_global(intx, InitArrayShortSize, 8*BytesPerLong);

 // Platform dependent flag handling: flags only defined on this platform.
 #define ARCH_FLAGS(develop, \
                    product, \
                    diagnostic, \
                    experimental, \
                    notproduct, \
                    range, \
                    constraint, \
                    writeable)  \
                                                                             \
   /* Load poll address from thread. This is used to implement per-thread */ \
   /* safepoints on platforms != IA64. */                                    \
   product(bool, LoadPollAddressFromThread, false,                           \
           "Load polling page address from thread object (required for "     \
           "per-thread safepoints on platforms != IA64)")                    \
                                                                             \
   product(uintx, PowerArchitecturePPC64, 0,                                 \
           "CPU Version: x for PowerX. Currently recognizes Power5 to "      \
           "Power8. Default is 0. Newer CPUs will be recognized as Power8.") \
                                                                             \
   /* 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, 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 eliding */                \
   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(uintx, RTMRetryCount, 5,                                          \
           "Number of RTM retries on lock abort or busy")                    \
                                                                             \
   experimental(intx, RTMSpinLoopCount, 100,                                 \
           "Spin count for lock to become free before RTM retry")            \
                                                                             \
   experimental(intx, RTMAbortThreshold, 1000,                               \
           "Calculate abort ratio after this number of aborts")              \
                                                                             \
   experimental(intx, RTMLockingThreshold, 10000,                            \
           "Lock count at which to do RTM lock eliding without "             \
           "abort ratio calculation")                                        \
                                                                             \
   experimental(intx, RTMAbortRatio, 50,                                     \
           "Lock abort ratio at which to stop use RTM lock eliding")         \
                                                                             \
   experimental(intx, RTMTotalCountIncrRate, 64,                             \
           "Increment total RTM attempted lock count once every n times")    \
                                                                             \
   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
	/*
	* Copyright (c) 2002, 2016, Oracle and/or its affiliates. All rights reserved.
	* Copyright (c) 2012, 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_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, ShareVtableStubs, false); // Improves performance markedly for mtrt and compress.
	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 (6)
	#define DEFAULT_STACK_RED_PAGES (1)
	#define DEFAULT_STACK_SHADOW_PAGES (6 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(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, 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);

	define_pd_global(intx, InitArrayShortSize, 8*BytesPerLong);

	// Platform dependent flag handling: flags only defined on this platform.
	#define ARCH_FLAGS(develop, \
	product, \
	diagnostic, \
	experimental, \
	notproduct, \
	range, \
	constraint, \
	writeable) \
	\
	/* Load poll address from thread. This is used to implement per-thread */ \
	/* safepoints on platforms != IA64. */ \
	product(bool, LoadPollAddressFromThread, false, \
	"Load polling page address from thread object (required for " \
	"per-thread safepoints on platforms != IA64)") \
	\
	product(uintx, PowerArchitecturePPC64, 0, \
	"CPU Version: x for PowerX. Currently recognizes Power5 to " \
	"Power8. Default is 0. Newer CPUs will be recognized as Power8.") \
	\
	/* 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, 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 eliding */ \
	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(uintx, RTMRetryCount, 5, \
	"Number of RTM retries on lock abort or busy") \
	\
	experimental(intx, RTMSpinLoopCount, 100, \
	"Spin count for lock to become free before RTM retry") \
	\
	experimental(intx, RTMAbortThreshold, 1000, \
	"Calculate abort ratio after this number of aborts") \
	\
	experimental(intx, RTMLockingThreshold, 10000, \
	"Lock count at which to do RTM lock eliding without " \
	"abort ratio calculation") \
	\
	experimental(intx, RTMAbortRatio, 50, \
	"Lock abort ratio at which to stop use RTM lock eliding") \
	\
	experimental(intx, RTMTotalCountIncrRate, 64, \
	"Increment total RTM attempted lock count once every n times") \
	\
	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