Mercurial > jdk8-mips64-public > hotspot / annotate
src/share/vm/runtime/threadLocalStorage.cpp@72053ed6f8d4 (annotated)
src/share/vm/runtime/threadLocalStorage.cpp
Thu, 24 Nov 2016 11:27:57 +0100
- author
- tschatzl
- date
- Thu, 24 Nov 2016 11:27:57 +0100
- changeset 9982
- 72053ed6f8d4
- parent 8187
- 3ad3f93fe3d2
- child 8604
- 04d83ba48607
- permissions
- -rw-r--r--
8057003: Large reference arrays cause extremely long synchronization times
Summary: Slice large object arrays into parts so that the synchronization of marking threads with an STW pause request does not take long.
Reviewed-by: ehelin, pliden
Contributed-by: maoliang.ml@alibaba-inc.com
| duke@435 | 1 | /* |
| dholmes@8187 | 2 | * Copyright (c) 1997, 2015, 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 | |
| stefank@2314 | 25 | #include "precompiled.hpp" |
| stefank@4299 | 26 | #include "runtime/thread.inline.hpp" |
| stefank@2314 | 27 | #include "runtime/threadLocalStorage.hpp" |
| stefank@2314 | 28 | #ifdef TARGET_OS_FAMILY_linux |
| stefank@2314 | 29 | # include "os_linux.inline.hpp" |
| stefank@2314 | 30 | #endif |
| stefank@2314 | 31 | #ifdef TARGET_OS_FAMILY_solaris |
| stefank@2314 | 32 | # include "os_solaris.inline.hpp" |
| stefank@2314 | 33 | #endif |
| stefank@2314 | 34 | #ifdef TARGET_OS_FAMILY_windows |
| stefank@2314 | 35 | # include "os_windows.inline.hpp" |
| stefank@2314 | 36 | #endif |
| never@3156 | 37 | #ifdef TARGET_OS_FAMILY_bsd |
| never@3156 | 38 | # include "os_bsd.inline.hpp" |
| never@3156 | 39 | #endif |
| duke@435 | 40 | |
| dholmes@8187 | 41 | // Solaris no longer has this kind of ThreadLocalStorage implementation. |
| dholmes@8187 | 42 | // This will be removed from all platforms in the near future. |
| dholmes@8187 | 43 | |
| dholmes@8187 | 44 | #ifndef SOLARIS |
| dholmes@8187 | 45 | |
| duke@435 | 46 | // static member initialization |
| duke@435 | 47 | int ThreadLocalStorage::_thread_index = -1; |
| duke@435 | 48 | |
| duke@435 | 49 | Thread* ThreadLocalStorage::get_thread_slow() { |
| duke@435 | 50 | return (Thread*) os::thread_local_storage_at(ThreadLocalStorage::thread_index()); |
| duke@435 | 51 | } |
| duke@435 | 52 | |
| duke@435 | 53 | void ThreadLocalStorage::set_thread(Thread* thread) { |
| duke@435 | 54 | pd_set_thread(thread); |
| duke@435 | 55 | |
| duke@435 | 56 | // The following ensure that any optimization tricks we have tried |
| duke@435 | 57 | // did not backfire on us: |
| duke@435 | 58 | guarantee(get_thread() == thread, "must be the same thread, quickly"); |
| duke@435 | 59 | guarantee(get_thread_slow() == thread, "must be the same thread, slowly"); |
| duke@435 | 60 | } |
| duke@435 | 61 | |
| duke@435 | 62 | void ThreadLocalStorage::init() { |
| kamg@677 | 63 | assert(!is_initialized(), |
| kamg@677 | 64 | "More than one attempt to initialize threadLocalStorage"); |
| duke@435 | 65 | pd_init(); |
| duke@435 | 66 | set_thread_index(os::allocate_thread_local_storage()); |
| duke@435 | 67 | generate_code_for_get_thread(); |
| duke@435 | 68 | } |
| kamg@677 | 69 | |
| kamg@677 | 70 | bool ThreadLocalStorage::is_initialized() { |
| kamg@677 | 71 | return (thread_index() != -1); |
| kamg@677 | 72 | } |
| dholmes@8187 | 73 | |
| dholmes@8187 | 74 | #endif // SOLARIS |
