Mercurial > hg > graal-jvmci-8
annotate src/os/linux/vm/os_linux.hpp @ 3286:139667d9836a
7034464: Support transparent large pages on Linux
Summary: Support transparent huge pages on Linux available since 2.6.38
Reviewed-by: iveresov, ysr
Contributed-by: aph@redhat.com
| author | iveresov |
|---|---|
| date | Wed, 20 Apr 2011 17:12:04 -0700 |
| parents | f95d63e2154a |
| children | 7c2653aefc46 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 1972 | 2 * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
|
1552
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
844
diff
changeset
|
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
|
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
844
diff
changeset
|
20 * or visit www.oracle.com if you need additional information or have any |
|
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
844
diff
changeset
|
21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #ifndef OS_LINUX_VM_OS_LINUX_HPP |
| 26 #define OS_LINUX_VM_OS_LINUX_HPP | |
| 27 | |
| 0 | 28 // Linux_OS defines the interface to Linux operating systems |
| 29 | |
| 30 /* pthread_getattr_np comes with LinuxThreads-0.9-7 on RedHat 7.1 */ | |
| 31 typedef int (*pthread_getattr_func_type) (pthread_t, pthread_attr_t *); | |
| 32 | |
| 33 class Linux { | |
| 34 friend class os; | |
| 35 | |
| 36 // For signal-chaining | |
| 37 #define MAXSIGNUM 32 | |
| 38 static struct sigaction sigact[MAXSIGNUM]; // saved preinstalled sigactions | |
| 39 static unsigned int sigs; // mask of signals that have | |
| 40 // preinstalled signal handlers | |
| 41 static bool libjsig_is_loaded; // libjsig that interposes sigaction(), | |
| 42 // __sigaction(), signal() is loaded | |
| 43 static struct sigaction *(*get_signal_action)(int); | |
| 44 static struct sigaction *get_preinstalled_handler(int); | |
| 45 static void save_preinstalled_handler(int, struct sigaction&); | |
| 46 | |
| 47 static void check_signal_handler(int sig); | |
| 48 | |
| 49 // For signal flags diagnostics | |
| 50 static int sigflags[MAXSIGNUM]; | |
| 51 | |
| 52 static int (*_clock_gettime)(clockid_t, struct timespec *); | |
| 53 static int (*_pthread_getcpuclockid)(pthread_t, clockid_t *); | |
| 54 | |
| 55 static address _initial_thread_stack_bottom; | |
| 56 static uintptr_t _initial_thread_stack_size; | |
| 57 | |
|
199
f139919897d2
6681796: hotspot build failure on gcc 4.2.x (ubuntu 8.04) w/ openjdk 6
xlu
parents:
141
diff
changeset
|
58 static const char *_glibc_version; |
|
f139919897d2
6681796: hotspot build failure on gcc 4.2.x (ubuntu 8.04) w/ openjdk 6
xlu
parents:
141
diff
changeset
|
59 static const char *_libpthread_version; |
| 0 | 60 |
| 61 static bool _is_floating_stack; | |
| 62 static bool _is_NPTL; | |
| 63 static bool _supports_fast_thread_cpu_time; | |
| 64 | |
| 141 | 65 static GrowableArray<int>* _cpu_to_node; |
| 66 | |
| 0 | 67 protected: |
| 68 | |
| 69 static julong _physical_memory; | |
| 70 static pthread_t _main_thread; | |
| 71 static Mutex* _createThread_lock; | |
| 72 static int _page_size; | |
| 73 | |
| 74 static julong available_memory(); | |
| 75 static julong physical_memory() { return _physical_memory; } | |
| 76 static void initialize_system_info(); | |
| 77 | |
|
199
f139919897d2
6681796: hotspot build failure on gcc 4.2.x (ubuntu 8.04) w/ openjdk 6
xlu
parents:
141
diff
changeset
|
78 static void set_glibc_version(const char *s) { _glibc_version = s; } |
|
f139919897d2
6681796: hotspot build failure on gcc 4.2.x (ubuntu 8.04) w/ openjdk 6
xlu
parents:
141
diff
changeset
|
79 static void set_libpthread_version(const char *s) { _libpthread_version = s; } |
| 0 | 80 |
| 81 static bool supports_variable_stack_size(); | |
| 82 | |
| 83 static void set_is_NPTL() { _is_NPTL = true; } | |
| 84 static void set_is_LinuxThreads() { _is_NPTL = false; } | |
| 85 static void set_is_floating_stack() { _is_floating_stack = true; } | |
| 86 | |
| 141 | 87 static void rebuild_cpu_to_node_map(); |
| 88 static GrowableArray<int>* cpu_to_node() { return _cpu_to_node; } | |
|
3286
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
1972
diff
changeset
|
89 |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
1972
diff
changeset
|
90 static bool hugetlbfs_sanity_check(bool warn, size_t page_size); |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
1972
diff
changeset
|
91 |
| 0 | 92 public: |
| 93 static void init_thread_fpu_state(); | |
| 94 static int get_fpu_control_word(); | |
| 95 static void set_fpu_control_word(int fpu_control); | |
| 96 static pthread_t main_thread(void) { return _main_thread; } | |
| 97 // returns kernel thread id (similar to LWP id on Solaris), which can be | |
| 98 // used to access /proc | |
| 99 static pid_t gettid(); | |
| 100 static void set_createThread_lock(Mutex* lk) { _createThread_lock = lk; } | |
| 101 static Mutex* createThread_lock(void) { return _createThread_lock; } | |
| 102 static void hotspot_sigmask(Thread* thread); | |
| 103 | |
| 104 static address initial_thread_stack_bottom(void) { return _initial_thread_stack_bottom; } | |
| 105 static uintptr_t initial_thread_stack_size(void) { return _initial_thread_stack_size; } | |
| 106 static bool is_initial_thread(void); | |
| 107 | |
| 108 static int page_size(void) { return _page_size; } | |
| 109 static void set_page_size(int val) { _page_size = val; } | |
| 110 | |
| 111 static address ucontext_get_pc(ucontext_t* uc); | |
| 112 static intptr_t* ucontext_get_sp(ucontext_t* uc); | |
| 113 static intptr_t* ucontext_get_fp(ucontext_t* uc); | |
| 114 | |
| 115 // For Analyzer Forte AsyncGetCallTrace profiling support: | |
| 116 // | |
| 117 // This interface should be declared in os_linux_i486.hpp, but | |
| 118 // that file provides extensions to the os class and not the | |
| 119 // Linux class. | |
| 120 static ExtendedPC fetch_frame_from_ucontext(Thread* thread, ucontext_t* uc, | |
| 121 intptr_t** ret_sp, intptr_t** ret_fp); | |
| 122 | |
| 123 // This boolean allows users to forward their own non-matching signals | |
| 124 // to JVM_handle_linux_signal, harmlessly. | |
| 125 static bool signal_handlers_are_installed; | |
| 126 | |
| 127 static int get_our_sigflags(int); | |
| 128 static void set_our_sigflags(int, int); | |
| 129 static void signal_sets_init(); | |
| 130 static void install_signal_handlers(); | |
| 131 static void set_signal_handler(int, bool); | |
| 132 static bool is_sig_ignored(int sig); | |
| 133 | |
| 134 static sigset_t* unblocked_signals(); | |
| 135 static sigset_t* vm_signals(); | |
| 136 static sigset_t* allowdebug_blocked_signals(); | |
| 137 | |
| 138 // For signal-chaining | |
| 139 static struct sigaction *get_chained_signal_action(int sig); | |
| 140 static bool chained_handler(int sig, siginfo_t* siginfo, void* context); | |
| 141 | |
| 142 // GNU libc and libpthread version strings | |
|
199
f139919897d2
6681796: hotspot build failure on gcc 4.2.x (ubuntu 8.04) w/ openjdk 6
xlu
parents:
141
diff
changeset
|
143 static const char *glibc_version() { return _glibc_version; } |
|
f139919897d2
6681796: hotspot build failure on gcc 4.2.x (ubuntu 8.04) w/ openjdk 6
xlu
parents:
141
diff
changeset
|
144 static const char *libpthread_version() { return _libpthread_version; } |
| 0 | 145 |
| 146 // NPTL or LinuxThreads? | |
| 147 static bool is_LinuxThreads() { return !_is_NPTL; } | |
| 148 static bool is_NPTL() { return _is_NPTL; } | |
| 149 | |
| 150 // NPTL is always floating stack. LinuxThreads could be using floating | |
| 151 // stack or fixed stack. | |
| 152 static bool is_floating_stack() { return _is_floating_stack; } | |
| 153 | |
| 154 static void libpthread_init(); | |
|
462
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
235
diff
changeset
|
155 static bool libnuma_init(); |
|
763
cf71f149d7ae
6840196: NUMA allocator: crash in fastdebug during startup on Linux
iveresov
parents:
462
diff
changeset
|
156 static void* libnuma_dlsym(void* handle, const char* name); |
| 0 | 157 // Minimum stack size a thread can be created with (allowing |
| 158 // the VM to completely create the thread and enter user code) | |
| 159 static size_t min_stack_allowed; | |
| 160 | |
| 161 // Return default stack size or guard size for the specified thread type | |
| 162 static size_t default_stack_size(os::ThreadType thr_type); | |
| 163 static size_t default_guard_size(os::ThreadType thr_type); | |
| 164 | |
| 165 static void capture_initial_stack(size_t max_size); | |
| 166 | |
| 167 // Stack overflow handling | |
| 168 static bool manually_expand_stack(JavaThread * t, address addr); | |
| 169 static int max_register_window_saves_before_flushing(); | |
| 170 | |
| 171 // Real-time clock functions | |
| 172 static void clock_init(void); | |
| 173 | |
| 174 // fast POSIX clocks support | |
| 175 static void fast_thread_clock_init(void); | |
| 176 | |
| 177 static bool supports_monotonic_clock() { | |
| 178 return _clock_gettime != NULL; | |
| 179 } | |
| 180 | |
| 181 static int clock_gettime(clockid_t clock_id, struct timespec *tp) { | |
| 182 return _clock_gettime ? _clock_gettime(clock_id, tp) : -1; | |
| 183 } | |
| 184 | |
| 185 static int pthread_getcpuclockid(pthread_t tid, clockid_t *clock_id) { | |
| 186 return _pthread_getcpuclockid ? _pthread_getcpuclockid(tid, clock_id) : -1; | |
| 187 } | |
| 188 | |
| 189 static bool supports_fast_thread_cpu_time() { | |
| 190 return _supports_fast_thread_cpu_time; | |
| 191 } | |
| 192 | |
| 193 static jlong fast_thread_cpu_time(clockid_t clockid); | |
| 194 | |
| 195 // Stack repair handling | |
| 196 | |
| 197 // none present | |
| 198 | |
| 199 // LinuxThreads work-around for 6292965 | |
| 200 static int safe_cond_timedwait(pthread_cond_t *_cond, pthread_mutex_t *_mutex, const struct timespec *_abstime); | |
| 201 | |
| 202 | |
| 203 // Linux suspend/resume support - this helper is a shadow of its former | |
| 204 // self now that low-level suspension is barely used, and old workarounds | |
| 205 // for LinuxThreads are no longer needed. | |
| 206 class SuspendResume { | |
| 207 private: | |
| 208 volatile int _suspend_action; | |
| 209 // values for suspend_action: | |
| 210 #define SR_NONE (0x00) | |
| 211 #define SR_SUSPEND (0x01) // suspend request | |
| 212 #define SR_CONTINUE (0x02) // resume request | |
| 213 | |
| 214 volatile jint _state; | |
| 215 // values for _state: + SR_NONE | |
| 216 #define SR_SUSPENDED (0x20) | |
| 217 public: | |
| 218 SuspendResume() { _suspend_action = SR_NONE; _state = SR_NONE; } | |
| 219 | |
| 220 int suspend_action() const { return _suspend_action; } | |
| 221 void set_suspend_action(int x) { _suspend_action = x; } | |
| 222 | |
| 223 // atomic updates for _state | |
| 224 void set_suspended() { | |
| 225 jint temp, temp2; | |
| 226 do { | |
| 227 temp = _state; | |
| 228 temp2 = Atomic::cmpxchg(temp | SR_SUSPENDED, &_state, temp); | |
| 229 } while (temp2 != temp); | |
| 230 } | |
| 231 void clear_suspended() { | |
| 232 jint temp, temp2; | |
| 233 do { | |
| 234 temp = _state; | |
| 235 temp2 = Atomic::cmpxchg(temp & ~SR_SUSPENDED, &_state, temp); | |
| 236 } while (temp2 != temp); | |
| 237 } | |
| 238 bool is_suspended() { return _state & SR_SUSPENDED; } | |
| 239 | |
| 240 #undef SR_SUSPENDED | |
| 241 }; | |
| 141 | 242 |
| 243 private: | |
| 244 typedef int (*sched_getcpu_func_t)(void); | |
| 245 typedef int (*numa_node_to_cpus_func_t)(int node, unsigned long *buffer, int bufferlen); | |
| 246 typedef int (*numa_max_node_func_t)(void); | |
| 247 typedef int (*numa_available_func_t)(void); | |
| 248 typedef int (*numa_tonode_memory_func_t)(void *start, size_t size, int node); | |
|
462
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
235
diff
changeset
|
249 typedef void (*numa_interleave_memory_func_t)(void *start, size_t size, unsigned long *nodemask); |
| 141 | 250 |
| 251 static sched_getcpu_func_t _sched_getcpu; | |
| 252 static numa_node_to_cpus_func_t _numa_node_to_cpus; | |
| 253 static numa_max_node_func_t _numa_max_node; | |
| 254 static numa_available_func_t _numa_available; | |
| 255 static numa_tonode_memory_func_t _numa_tonode_memory; | |
|
462
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
235
diff
changeset
|
256 static numa_interleave_memory_func_t _numa_interleave_memory; |
|
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
235
diff
changeset
|
257 static unsigned long* _numa_all_nodes; |
| 141 | 258 |
| 259 static void set_sched_getcpu(sched_getcpu_func_t func) { _sched_getcpu = func; } | |
| 260 static void set_numa_node_to_cpus(numa_node_to_cpus_func_t func) { _numa_node_to_cpus = func; } | |
| 261 static void set_numa_max_node(numa_max_node_func_t func) { _numa_max_node = func; } | |
| 262 static void set_numa_available(numa_available_func_t func) { _numa_available = func; } | |
| 263 static void set_numa_tonode_memory(numa_tonode_memory_func_t func) { _numa_tonode_memory = func; } | |
|
462
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
235
diff
changeset
|
264 static void set_numa_interleave_memory(numa_interleave_memory_func_t func) { _numa_interleave_memory = func; } |
|
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
235
diff
changeset
|
265 static void set_numa_all_nodes(unsigned long* ptr) { _numa_all_nodes = ptr; } |
| 141 | 266 public: |
| 267 static int sched_getcpu() { return _sched_getcpu != NULL ? _sched_getcpu() : -1; } | |
| 268 static int numa_node_to_cpus(int node, unsigned long *buffer, int bufferlen) { | |
| 269 return _numa_node_to_cpus != NULL ? _numa_node_to_cpus(node, buffer, bufferlen) : -1; | |
| 270 } | |
| 271 static int numa_max_node() { return _numa_max_node != NULL ? _numa_max_node() : -1; } | |
| 272 static int numa_available() { return _numa_available != NULL ? _numa_available() : -1; } | |
| 273 static int numa_tonode_memory(void *start, size_t size, int node) { | |
| 274 return _numa_tonode_memory != NULL ? _numa_tonode_memory(start, size, node) : -1; | |
| 275 } | |
|
462
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
235
diff
changeset
|
276 static void numa_interleave_memory(void *start, size_t size) { |
|
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
235
diff
changeset
|
277 if (_numa_interleave_memory != NULL && _numa_all_nodes != NULL) { |
|
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
235
diff
changeset
|
278 _numa_interleave_memory(start, size, _numa_all_nodes); |
|
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
235
diff
changeset
|
279 } |
|
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
235
diff
changeset
|
280 } |
| 141 | 281 static int get_node_by_cpu(int cpu_id); |
| 0 | 282 }; |
| 283 | |
| 284 | |
| 285 class PlatformEvent : public CHeapObj { | |
| 286 private: | |
| 287 double CachePad [4] ; // increase odds that _mutex is sole occupant of cache line | |
| 288 volatile int _Event ; | |
| 289 volatile int _nParked ; | |
| 290 pthread_mutex_t _mutex [1] ; | |
| 291 pthread_cond_t _cond [1] ; | |
| 292 double PostPad [2] ; | |
| 293 Thread * _Assoc ; | |
| 294 | |
| 295 public: // TODO-FIXME: make dtor private | |
| 296 ~PlatformEvent() { guarantee (0, "invariant") ; } | |
| 297 | |
| 298 public: | |
| 299 PlatformEvent() { | |
| 300 int status; | |
| 301 status = pthread_cond_init (_cond, NULL); | |
| 302 assert_status(status == 0, status, "cond_init"); | |
| 303 status = pthread_mutex_init (_mutex, NULL); | |
| 304 assert_status(status == 0, status, "mutex_init"); | |
| 305 _Event = 0 ; | |
| 306 _nParked = 0 ; | |
| 307 _Assoc = NULL ; | |
| 308 } | |
| 309 | |
| 310 // Use caution with reset() and fired() -- they may require MEMBARs | |
| 311 void reset() { _Event = 0 ; } | |
| 312 int fired() { return _Event; } | |
| 313 void park () ; | |
| 314 void unpark () ; | |
| 315 int TryPark () ; | |
| 316 int park (jlong millis) ; | |
| 317 void SetAssociation (Thread * a) { _Assoc = a ; } | |
| 318 } ; | |
| 319 | |
| 320 class PlatformParker : public CHeapObj { | |
| 321 protected: | |
| 322 pthread_mutex_t _mutex [1] ; | |
| 323 pthread_cond_t _cond [1] ; | |
| 324 | |
| 325 public: // TODO-FIXME: make dtor private | |
| 326 ~PlatformParker() { guarantee (0, "invariant") ; } | |
| 327 | |
| 328 public: | |
| 329 PlatformParker() { | |
| 330 int status; | |
| 331 status = pthread_cond_init (_cond, NULL); | |
| 332 assert_status(status == 0, status, "cond_init"); | |
| 333 status = pthread_mutex_init (_mutex, NULL); | |
| 334 assert_status(status == 0, status, "mutex_init"); | |
| 335 } | |
| 336 } ; | |
| 1972 | 337 |
| 338 #endif // OS_LINUX_VM_OS_LINUX_HPP |