Mercurial > jdk8-mips64-public > hotspot / annotate
src/share/vm/runtime/prefetch.hpp@2a47bd84841f (annotated)
src/share/vm/runtime/prefetch.hpp
Thu, 08 Jul 2010 14:29:44 -0700
- author
- never
- date
- Thu, 08 Jul 2010 14:29:44 -0700
- changeset 1999
- 2a47bd84841f
- parent 1907
- c18cbe5936b8
- child 2314
- f95d63e2154a
- permissions
- -rw-r--r--
6965184: possible races in make_not_entrant_or_zombie
Reviewed-by: kvn
| duke@435 | 1 | /* |
| trims@1907 | 2 | * Copyright (c) 2003, Oracle and/or its affiliates. All rights reserved. |
| duke@435 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| duke@435 | 4 | * |
| duke@435 | 5 | * This code is free software; you can redistribute it and/or modify it |
| duke@435 | 6 | * under the terms of the GNU General Public License version 2 only, as |
| duke@435 | 7 | * published by the Free Software Foundation. |
| duke@435 | 8 | * |
| duke@435 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| duke@435 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| duke@435 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| duke@435 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
| duke@435 | 13 | * accompanied this code). |
| duke@435 | 14 | * |
| duke@435 | 15 | * You should have received a copy of the GNU General Public License version |
| duke@435 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
| duke@435 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| duke@435 | 18 | * |
| trims@1907 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| trims@1907 | 20 | * or visit www.oracle.com if you need additional information or have any |
| trims@1907 | 21 | * questions. |
| duke@435 | 22 | * |
| duke@435 | 23 | */ |
| duke@435 | 24 | |
| duke@435 | 25 | // If calls to prefetch methods are in a loop, the loop should be cloned |
| duke@435 | 26 | // such that if Prefetch{Scan,Copy}Interval and/or PrefetchFieldInterval |
| duke@435 | 27 | // say not to do prefetching, these methods aren't called. At the very |
| duke@435 | 28 | // least, they take up a memory issue slot. They should be implemented |
| duke@435 | 29 | // as inline assembly code: doing an actual call isn't worth the cost. |
| duke@435 | 30 | |
| duke@435 | 31 | class Prefetch : AllStatic { |
| duke@435 | 32 | public: |
| duke@435 | 33 | enum style { |
| duke@435 | 34 | do_none, // Do no prefetching |
| duke@435 | 35 | do_read, // Do read prefetching |
| duke@435 | 36 | do_write // Do write prefetching |
| duke@435 | 37 | }; |
| duke@435 | 38 | |
| duke@435 | 39 | // Prefetch anticipating read; must not fault, semantically a no-op |
| duke@435 | 40 | static void read(void* loc, intx interval); |
| duke@435 | 41 | |
| duke@435 | 42 | // Prefetch anticipating write; must not fault, semantically a no-op |
| duke@435 | 43 | static void write(void* loc, intx interval); |
| duke@435 | 44 | }; |
