From 805866bbf680f44219e5c634eb9726e1c5dea690 Mon Sep 17 00:00:00 2001 From: jonghoonpark Date: Fri, 9 Jan 2026 22:42:53 +0000 Subject: [PATCH] 8372040: Remove Prefetch header vs inline header separation Reviewed-by: kbarrett, stefank --- .../aix_ppc/prefetch_aix_ppc.inline.hpp | 5 +-- .../prefetch_bsd_aarch64.inline.hpp | 5 +-- .../bsd_x86/prefetch_bsd_x86.inline.hpp | 5 +-- .../bsd_zero/prefetch_bsd_zero.inline.hpp | 4 +- .../prefetch_linux_aarch64.inline.hpp | 5 +-- .../linux_arm/prefetch_linux_arm.inline.hpp | 4 +- .../linux_ppc/prefetch_linux_ppc.inline.hpp | 5 +-- .../prefetch_linux_riscv.inline.hpp | 4 +- .../linux_s390/prefetch_linux_s390.inline.hpp | 4 +- .../linux_x86/prefetch_linux_x86.inline.hpp | 5 +-- .../linux_zero/prefetch_linux_zero.inline.hpp | 4 +- .../prefetch_windows_aarch64.inline.hpp | 5 +-- .../prefetch_windows_x86.inline.hpp | 4 +- .../gc/g1/g1YoungGCPostEvacuateTasks.cpp | 4 +- src/hotspot/share/gc/serial/cardTableRS.cpp | 3 +- src/hotspot/share/gc/serial/generation.hpp | 3 +- src/hotspot/share/runtime/prefetch.hpp | 45 ------------------- src/hotspot/share/runtime/prefetch.inline.hpp | 21 +++++++-- 18 files changed, 49 insertions(+), 86 deletions(-) delete mode 100644 src/hotspot/share/runtime/prefetch.hpp diff --git a/src/hotspot/os_cpu/aix_ppc/prefetch_aix_ppc.inline.hpp b/src/hotspot/os_cpu/aix_ppc/prefetch_aix_ppc.inline.hpp index 1f9917acae7..c741335b5f0 100644 --- a/src/hotspot/os_cpu/aix_ppc/prefetch_aix_ppc.inline.hpp +++ b/src/hotspot/os_cpu/aix_ppc/prefetch_aix_ppc.inline.hpp @@ -1,5 +1,5 @@ /* - * Copyright (c) 1997, 2021, Oracle and/or its affiliates. All rights reserved. + * Copyright (c) 1997, 2026, Oracle and/or its affiliates. All rights reserved. * Copyright (c) 2012, 2013 SAP SE. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * @@ -26,8 +26,7 @@ #ifndef OS_CPU_AIX_PPC_PREFETCH_AIX_PPC_INLINE_HPP #define OS_CPU_AIX_PPC_PREFETCH_AIX_PPC_INLINE_HPP -#include "runtime/prefetch.hpp" - +// Included in runtime/prefetch.inline.hpp inline void Prefetch::read(const void *loc, intx interval) { #if !defined(USE_XLC_BUILTINS) diff --git a/src/hotspot/os_cpu/bsd_aarch64/prefetch_bsd_aarch64.inline.hpp b/src/hotspot/os_cpu/bsd_aarch64/prefetch_bsd_aarch64.inline.hpp index 1bcbdcaf90d..185f9b54144 100644 --- a/src/hotspot/os_cpu/bsd_aarch64/prefetch_bsd_aarch64.inline.hpp +++ b/src/hotspot/os_cpu/bsd_aarch64/prefetch_bsd_aarch64.inline.hpp @@ -1,5 +1,5 @@ /* - * Copyright (c) 2003, 2021, Oracle and/or its affiliates. All rights reserved. + * Copyright (c) 2003, 2026, Oracle and/or its affiliates. All rights reserved. * Copyright (c) 2014, Red Hat Inc. All rights reserved. * Copyright (c) 2021, Azul Systems, Inc. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. @@ -27,8 +27,7 @@ #ifndef OS_CPU_BSD_AARCH64_PREFETCH_BSD_AARCH64_INLINE_HPP #define OS_CPU_BSD_AARCH64_PREFETCH_BSD_AARCH64_INLINE_HPP -#include "runtime/prefetch.hpp" - +// Included in runtime/prefetch.inline.hpp inline void Prefetch::read (const void *loc, intx interval) { if (interval >= 0) diff --git a/src/hotspot/os_cpu/bsd_x86/prefetch_bsd_x86.inline.hpp b/src/hotspot/os_cpu/bsd_x86/prefetch_bsd_x86.inline.hpp index 52cc405e211..464740920a1 100644 --- a/src/hotspot/os_cpu/bsd_x86/prefetch_bsd_x86.inline.hpp +++ b/src/hotspot/os_cpu/bsd_x86/prefetch_bsd_x86.inline.hpp @@ -1,5 +1,5 @@ /* - * Copyright (c) 2003, 2025, Oracle and/or its affiliates. All rights reserved. + * Copyright (c) 2003, 2026, Oracle and/or its affiliates. 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 @@ -25,8 +25,7 @@ #ifndef OS_CPU_BSD_X86_PREFETCH_BSD_X86_INLINE_HPP #define OS_CPU_BSD_X86_PREFETCH_BSD_X86_INLINE_HPP -#include "runtime/prefetch.hpp" - +// Included in runtime/prefetch.inline.hpp inline void Prefetch::read (const void *loc, intx interval) { __asm__ ("prefetcht0 (%0,%1,1)" : : "r" (loc), "r" (interval)); diff --git a/src/hotspot/os_cpu/bsd_zero/prefetch_bsd_zero.inline.hpp b/src/hotspot/os_cpu/bsd_zero/prefetch_bsd_zero.inline.hpp index 220d6a08f68..5edf3744719 100644 --- a/src/hotspot/os_cpu/bsd_zero/prefetch_bsd_zero.inline.hpp +++ b/src/hotspot/os_cpu/bsd_zero/prefetch_bsd_zero.inline.hpp @@ -1,5 +1,5 @@ /* - * Copyright (c) 2003, 2021, Oracle and/or its affiliates. All rights reserved. + * Copyright (c) 2003, 2026, Oracle and/or its affiliates. All rights reserved. * Copyright 2007, 2008 Red Hat, Inc. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * @@ -26,7 +26,7 @@ #ifndef OS_CPU_BSD_ZERO_PREFETCH_BSD_ZERO_INLINE_HPP #define OS_CPU_BSD_ZERO_PREFETCH_BSD_ZERO_INLINE_HPP -#include "runtime/prefetch.hpp" +// Included in runtime/prefetch.inline.hpp inline void Prefetch::read(const void* loc, intx interval) { } diff --git a/src/hotspot/os_cpu/linux_aarch64/prefetch_linux_aarch64.inline.hpp b/src/hotspot/os_cpu/linux_aarch64/prefetch_linux_aarch64.inline.hpp index 168a680a404..580e9f4ffa2 100644 --- a/src/hotspot/os_cpu/linux_aarch64/prefetch_linux_aarch64.inline.hpp +++ b/src/hotspot/os_cpu/linux_aarch64/prefetch_linux_aarch64.inline.hpp @@ -1,5 +1,5 @@ /* - * Copyright (c) 2003, 2021, Oracle and/or its affiliates. All rights reserved. + * Copyright (c) 2003, 2026, Oracle and/or its affiliates. All rights reserved. * Copyright (c) 2014, Red Hat Inc. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * @@ -26,8 +26,7 @@ #ifndef OS_CPU_LINUX_AARCH64_PREFETCH_LINUX_AARCH64_INLINE_HPP #define OS_CPU_LINUX_AARCH64_PREFETCH_LINUX_AARCH64_INLINE_HPP -#include "runtime/prefetch.hpp" - +// Included in runtime/prefetch.inline.hpp inline void Prefetch::read (const void *loc, intx interval) { if (interval >= 0) diff --git a/src/hotspot/os_cpu/linux_arm/prefetch_linux_arm.inline.hpp b/src/hotspot/os_cpu/linux_arm/prefetch_linux_arm.inline.hpp index dfbab55d9b9..a536c17fbe3 100644 --- a/src/hotspot/os_cpu/linux_arm/prefetch_linux_arm.inline.hpp +++ b/src/hotspot/os_cpu/linux_arm/prefetch_linux_arm.inline.hpp @@ -1,5 +1,5 @@ /* - * Copyright (c) 2008, 2021, Oracle and/or its affiliates. All rights reserved. + * Copyright (c) 2008, 2026, Oracle and/or its affiliates. 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 @@ -25,7 +25,7 @@ #ifndef OS_CPU_LINUX_ARM_PREFETCH_LINUX_ARM_INLINE_HPP #define OS_CPU_LINUX_ARM_PREFETCH_LINUX_ARM_INLINE_HPP -#include "runtime/prefetch.hpp" +// Included in runtime/prefetch.inline.hpp inline void Prefetch::read (const void *loc, intx interval) { #if defined(__ARM_ARCH_7A__) || defined(__ARM_ARCH_6__) || defined(__ARM_ARCH_5TE__) diff --git a/src/hotspot/os_cpu/linux_ppc/prefetch_linux_ppc.inline.hpp b/src/hotspot/os_cpu/linux_ppc/prefetch_linux_ppc.inline.hpp index 12c65e6bf00..c33624a07de 100644 --- a/src/hotspot/os_cpu/linux_ppc/prefetch_linux_ppc.inline.hpp +++ b/src/hotspot/os_cpu/linux_ppc/prefetch_linux_ppc.inline.hpp @@ -1,5 +1,5 @@ /* - * Copyright (c) 1997, 2021, Oracle and/or its affiliates. All rights reserved. + * Copyright (c) 1997, 2026, Oracle and/or its affiliates. All rights reserved. * Copyright (c) 2012, 2013 SAP SE. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * @@ -26,8 +26,7 @@ #ifndef OS_CPU_LINUX_PPC_PREFETCH_LINUX_PPC_INLINE_HPP #define OS_CPU_LINUX_PPC_PREFETCH_LINUX_PPC_INLINE_HPP -#include "runtime/prefetch.hpp" - +// Included in runtime/prefetch.inline.hpp inline void Prefetch::read(const void *loc, intx interval) { __asm__ __volatile__ ( diff --git a/src/hotspot/os_cpu/linux_riscv/prefetch_linux_riscv.inline.hpp b/src/hotspot/os_cpu/linux_riscv/prefetch_linux_riscv.inline.hpp index a2dd79544c1..c17054e8a0c 100644 --- a/src/hotspot/os_cpu/linux_riscv/prefetch_linux_riscv.inline.hpp +++ b/src/hotspot/os_cpu/linux_riscv/prefetch_linux_riscv.inline.hpp @@ -1,5 +1,5 @@ /* - * Copyright (c) 2003, 2019, Oracle and/or its affiliates. All rights reserved. + * Copyright (c) 2003, 2026, Oracle and/or its affiliates. All rights reserved. * Copyright (c) 2020, 2021, Huawei Technologies Co., Ltd. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * @@ -26,7 +26,7 @@ #ifndef OS_CPU_LINUX_RISCV_VM_PREFETCH_LINUX_RISCV_INLINE_HPP #define OS_CPU_LINUX_RISCV_VM_PREFETCH_LINUX_RISCV_INLINE_HPP -#include "runtime/prefetch.hpp" +// Included in runtime/prefetch.inline.hpp inline void Prefetch::read (const void *loc, intx interval) { if (interval >= 0 && UseZicbop) { diff --git a/src/hotspot/os_cpu/linux_s390/prefetch_linux_s390.inline.hpp b/src/hotspot/os_cpu/linux_s390/prefetch_linux_s390.inline.hpp index ee55d01886f..56038714a9a 100644 --- a/src/hotspot/os_cpu/linux_s390/prefetch_linux_s390.inline.hpp +++ b/src/hotspot/os_cpu/linux_s390/prefetch_linux_s390.inline.hpp @@ -1,5 +1,5 @@ /* - * Copyright (c) 2016, 2021, Oracle and/or its affiliates. All rights reserved. + * Copyright (c) 2016, 2026, 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. * @@ -26,7 +26,7 @@ #ifndef OS_CPU_LINUX_S390_PREFETCH_LINUX_S390_INLINE_HPP #define OS_CPU_LINUX_S390_PREFETCH_LINUX_S390_INLINE_HPP -#include "runtime/prefetch.hpp" +// Included in runtime/prefetch.inline.hpp inline void Prefetch::read(const void* loc, intx interval) { // No prefetch instructions on z/Architecture -> implement trivially. diff --git a/src/hotspot/os_cpu/linux_x86/prefetch_linux_x86.inline.hpp b/src/hotspot/os_cpu/linux_x86/prefetch_linux_x86.inline.hpp index bb4302e1ddb..aadd21bca40 100644 --- a/src/hotspot/os_cpu/linux_x86/prefetch_linux_x86.inline.hpp +++ b/src/hotspot/os_cpu/linux_x86/prefetch_linux_x86.inline.hpp @@ -1,5 +1,5 @@ /* - * Copyright (c) 2003, 2025, Oracle and/or its affiliates. All rights reserved. + * Copyright (c) 2003, 2026, Oracle and/or its affiliates. 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 @@ -25,8 +25,7 @@ #ifndef OS_CPU_LINUX_X86_PREFETCH_LINUX_X86_INLINE_HPP #define OS_CPU_LINUX_X86_PREFETCH_LINUX_X86_INLINE_HPP -#include "runtime/prefetch.hpp" - +// Included in runtime/prefetch.inline.hpp inline void Prefetch::read (const void *loc, intx interval) { __asm__ ("prefetcht0 (%0,%1,1)" : : "r" (loc), "r" (interval)); diff --git a/src/hotspot/os_cpu/linux_zero/prefetch_linux_zero.inline.hpp b/src/hotspot/os_cpu/linux_zero/prefetch_linux_zero.inline.hpp index a510fa87834..3a34c311acd 100644 --- a/src/hotspot/os_cpu/linux_zero/prefetch_linux_zero.inline.hpp +++ b/src/hotspot/os_cpu/linux_zero/prefetch_linux_zero.inline.hpp @@ -1,5 +1,5 @@ /* - * Copyright (c) 2003, 2021, Oracle and/or its affiliates. All rights reserved. + * Copyright (c) 2003, 2026, Oracle and/or its affiliates. All rights reserved. * Copyright 2007, 2008 Red Hat, Inc. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * @@ -26,7 +26,7 @@ #ifndef OS_CPU_LINUX_ZERO_PREFETCH_LINUX_ZERO_INLINE_HPP #define OS_CPU_LINUX_ZERO_PREFETCH_LINUX_ZERO_INLINE_HPP -#include "runtime/prefetch.hpp" +// Included in runtime/prefetch.inline.hpp inline void Prefetch::read(const void* loc, intx interval) { } diff --git a/src/hotspot/os_cpu/windows_aarch64/prefetch_windows_aarch64.inline.hpp b/src/hotspot/os_cpu/windows_aarch64/prefetch_windows_aarch64.inline.hpp index df301ade92d..a360ee342be 100644 --- a/src/hotspot/os_cpu/windows_aarch64/prefetch_windows_aarch64.inline.hpp +++ b/src/hotspot/os_cpu/windows_aarch64/prefetch_windows_aarch64.inline.hpp @@ -1,5 +1,5 @@ /* - * Copyright (c) 2020, Microsoft Corporation. All rights reserved. + * Copyright (c) 2020, 2026, Microsoft Corporation. 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 @@ -25,8 +25,7 @@ #ifndef OS_CPU_WINDOWS_AARCH64_PREFETCH_WINDOWS_AARCH64_INLINE_HPP #define OS_CPU_WINDOWS_AARCH64_PREFETCH_WINDOWS_AARCH64_INLINE_HPP -#include "runtime/prefetch.hpp" - +// Included in runtime/prefetch.inline.hpp inline void Prefetch::read (const void *loc, intx interval) { } diff --git a/src/hotspot/os_cpu/windows_x86/prefetch_windows_x86.inline.hpp b/src/hotspot/os_cpu/windows_x86/prefetch_windows_x86.inline.hpp index 996625cb0ad..645fbe99a22 100644 --- a/src/hotspot/os_cpu/windows_x86/prefetch_windows_x86.inline.hpp +++ b/src/hotspot/os_cpu/windows_x86/prefetch_windows_x86.inline.hpp @@ -1,5 +1,5 @@ /* - * Copyright (c) 2003, 2021, Oracle and/or its affiliates. All rights reserved. + * Copyright (c) 2003, 2026, Oracle and/or its affiliates. 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 @@ -25,7 +25,7 @@ #ifndef OS_CPU_WINDOWS_X86_PREFETCH_WINDOWS_X86_INLINE_HPP #define OS_CPU_WINDOWS_X86_PREFETCH_WINDOWS_X86_INLINE_HPP -#include "runtime/prefetch.hpp" +// Included in runtime/prefetch.inline.hpp inline void Prefetch::read (const void *loc, intx interval) {} inline void Prefetch::write(void *loc, intx interval) {} diff --git a/src/hotspot/share/gc/g1/g1YoungGCPostEvacuateTasks.cpp b/src/hotspot/share/gc/g1/g1YoungGCPostEvacuateTasks.cpp index d875d9c8b8a..ec5d2393d8c 100644 --- a/src/hotspot/share/gc/g1/g1YoungGCPostEvacuateTasks.cpp +++ b/src/hotspot/share/gc/g1/g1YoungGCPostEvacuateTasks.cpp @@ -1,5 +1,5 @@ /* - * Copyright (c) 2021, 2025, Oracle and/or its affiliates. All rights reserved. + * Copyright (c) 2021, 2026, Oracle and/or its affiliates. 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 @@ -46,7 +46,7 @@ #include "oops/access.inline.hpp" #include "oops/compressedOops.inline.hpp" #include "oops/oop.inline.hpp" -#include "runtime/prefetch.hpp" +#include "runtime/prefetch.inline.hpp" #include "runtime/threads.hpp" #include "runtime/threadSMR.hpp" #include "utilities/bitMap.inline.hpp" diff --git a/src/hotspot/share/gc/serial/cardTableRS.cpp b/src/hotspot/share/gc/serial/cardTableRS.cpp index 80985424a62..a53ab066387 100644 --- a/src/hotspot/share/gc/serial/cardTableRS.cpp +++ b/src/hotspot/share/gc/serial/cardTableRS.cpp @@ -1,5 +1,5 @@ /* - * Copyright (c) 2001, 2025, Oracle and/or its affiliates. All rights reserved. + * Copyright (c) 2001, 2026, Oracle and/or its affiliates. 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 @@ -28,6 +28,7 @@ #include "gc/serial/serialHeap.inline.hpp" #include "gc/shared/space.hpp" #include "memory/iterator.inline.hpp" +#include "runtime/prefetch.inline.hpp" #include "utilities/align.hpp" void CardTableRS::scan_old_to_young_refs(TenuredGeneration* tg, HeapWord* saved_top) { diff --git a/src/hotspot/share/gc/serial/generation.hpp b/src/hotspot/share/gc/serial/generation.hpp index 8c9da3b42b7..ddfd4028a7d 100644 --- a/src/hotspot/share/gc/serial/generation.hpp +++ b/src/hotspot/share/gc/serial/generation.hpp @@ -1,5 +1,5 @@ /* - * Copyright (c) 1997, 2024, Oracle and/or its affiliates. All rights reserved. + * Copyright (c) 1997, 2026, Oracle and/or its affiliates. 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 @@ -34,7 +34,6 @@ #include "memory/virtualspace.hpp" #include "runtime/mutex.hpp" #include "runtime/perfData.hpp" -#include "runtime/prefetch.inline.hpp" // A Generation models a heap area for similarly-aged objects. // It will contain one ore more spaces holding the actual objects. diff --git a/src/hotspot/share/runtime/prefetch.hpp b/src/hotspot/share/runtime/prefetch.hpp deleted file mode 100644 index 601337c14af..00000000000 --- a/src/hotspot/share/runtime/prefetch.hpp +++ /dev/null @@ -1,45 +0,0 @@ -/* - * Copyright (c) 2003, 2022, Oracle and/or its affiliates. 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 SHARE_RUNTIME_PREFETCH_HPP -#define SHARE_RUNTIME_PREFETCH_HPP - -#include "memory/allStatic.hpp" - -// If calls to prefetch methods are in a loop, the loop should be cloned -// such that if Prefetch{Scan,Copy}Interval and/or PrefetchFieldInterval -// say not to do prefetching, these methods aren't called. At the very -// least, they take up a memory issue slot. They should be implemented -// as inline assembly code: doing an actual call isn't worth the cost. - -class Prefetch : AllStatic { - public: - // Prefetch anticipating read; must not fault, semantically a no-op - static void read(const void* loc, intx interval); - - // Prefetch anticipating write; must not fault, semantically a no-op - static void write(void* loc, intx interval); -}; - -#endif // SHARE_RUNTIME_PREFETCH_HPP diff --git a/src/hotspot/share/runtime/prefetch.inline.hpp b/src/hotspot/share/runtime/prefetch.inline.hpp index 4cc1d93f613..18630f71a62 100644 --- a/src/hotspot/share/runtime/prefetch.inline.hpp +++ b/src/hotspot/share/runtime/prefetch.inline.hpp @@ -1,5 +1,5 @@ /* - * Copyright (c) 2014, 2019, Oracle and/or its affiliates. All rights reserved. + * Copyright (c) 2014, 2026, Oracle and/or its affiliates. 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 @@ -25,9 +25,24 @@ #ifndef SHARE_RUNTIME_PREFETCH_INLINE_HPP #define SHARE_RUNTIME_PREFETCH_INLINE_HPP -#include "runtime/prefetch.hpp" - +#include "memory/allStatic.hpp" #include "utilities/macros.hpp" + +// If calls to prefetch methods are in a loop, the loop should be cloned +// such that if Prefetch{Scan,Copy}Interval and/or PrefetchFieldInterval +// say not to do prefetching, these methods aren't called. At the very +// least, they take up a memory issue slot. They should be implemented +// as inline assembly code: doing an actual call isn't worth the cost. + +class Prefetch : AllStatic { + public: + // Prefetch anticipating read; must not fault, semantically a no-op + static void read(const void* loc, intx interval); + + // Prefetch anticipating write; must not fault, semantically a no-op + static void write(void* loc, intx interval); +}; + #include OS_CPU_HEADER_INLINE(prefetch) #endif // SHARE_RUNTIME_PREFETCH_INLINE_HPP