Mercurial > hg > graal-compiler
annotate src/share/vm/runtime/perfData.cpp @ 4712:e7dead7e90af
7117303: VM uses non-monotonic time source and complains that it is non-monotonic
Summary: Replaces calls to os::javaTimeMillis(), which does not (and cannot) guarantee monotonicity, in GC code to an equivalent expression that uses os::javaTimeNanos(). os::javaTimeNanos is guaranteed monotonically non-decreasing if the underlying platform provides a monotonic time source. Changes in OS files are to make use of the newly defined constants in globalDefinitions.hpp.
Reviewed-by: dholmes, ysr
author | johnc |
---|---|
date | Mon, 19 Dec 2011 10:02:05 -0800 |
parents | f95d63e2154a |
children | d2a62e0f25eb |
rev | line source |
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0 | 1 /* |
1972 | 2 * Copyright (c) 2001, 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
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "classfile/vmSymbols.hpp" | |
27 #include "oops/oop.inline.hpp" | |
28 #include "runtime/handles.inline.hpp" | |
29 #include "runtime/java.hpp" | |
30 #include "runtime/mutex.hpp" | |
31 #include "runtime/mutexLocker.hpp" | |
32 #include "runtime/os.hpp" | |
33 #include "runtime/perfData.hpp" | |
34 #include "utilities/exceptions.hpp" | |
35 #include "utilities/globalDefinitions.hpp" | |
0 | 36 |
37 PerfDataList* PerfDataManager::_all = NULL; | |
38 PerfDataList* PerfDataManager::_sampled = NULL; | |
39 PerfDataList* PerfDataManager::_constants = NULL; | |
40 | |
41 /* | |
42 * The jvmstat global and subsysem jvmstat counter name spaces. The top | |
43 * level name spaces imply the interface stability level of the counter, | |
44 * which generally follows the Java package, class, and property naming | |
45 * conventions. The CounterNS enumeration values should be used to index | |
46 * into this array. | |
47 */ | |
48 const char* PerfDataManager::_name_spaces[] = { | |
49 // top level name spaces | |
50 "java", // stable and supported name space | |
51 "com.sun", // unstable but supported name space | |
52 "sun", // unstable and unsupported name space | |
53 // subsystem name spaces | |
54 "java.gc", // Garbage Collection name spaces | |
55 "com.sun.gc", | |
56 "sun.gc", | |
57 "java.ci", // Compiler name spaces | |
58 "com.sun.ci", | |
59 "sun.ci", | |
60 "java.cls", // Class Loader name spaces | |
61 "com.sun.cls", | |
62 "sun.cls", | |
63 "java.rt", // Runtime name spaces | |
64 "com.sun.rt", | |
65 "sun.rt", | |
66 "java.os", // Operating System name spaces | |
67 "com.sun.os", | |
68 "sun.os", | |
69 "java.threads", // Threads System name spaces | |
70 "com.sun.threads", | |
71 "sun.threads", | |
72 "java.property", // Java Property name spaces | |
73 "com.sun.property", | |
74 "sun.property", | |
75 "", | |
76 }; | |
77 | |
78 PerfData::PerfData(CounterNS ns, const char* name, Units u, Variability v) | |
79 : _name(NULL), _u(u), _v(v), _valuep(NULL), | |
80 _on_c_heap(false) { | |
81 | |
82 const char* prefix = PerfDataManager::ns_to_string(ns); | |
83 | |
84 _name = NEW_C_HEAP_ARRAY(char, strlen(name) + strlen(prefix) + 2); | |
85 assert(_name != NULL && strlen(name) != 0, "invalid name"); | |
86 | |
87 if (ns == NULL_NS) { | |
88 // No prefix is added to counters with the NULL_NS namespace. | |
89 strcpy(_name, name); | |
90 // set the F_Supported flag based on the counter name prefix. | |
91 if (PerfDataManager::is_stable_supported(_name) || | |
92 PerfDataManager::is_unstable_supported(_name)) { | |
93 _flags = F_Supported; | |
94 } | |
95 else { | |
96 _flags = F_None; | |
97 } | |
98 } | |
99 else { | |
100 sprintf(_name, "%s.%s", prefix, name); | |
101 // set the F_Supported flag based on the given namespace. | |
102 if (PerfDataManager::is_stable_supported(ns) || | |
103 PerfDataManager::is_unstable_supported(ns)) { | |
104 _flags = F_Supported; | |
105 } | |
106 else { | |
107 _flags = F_None; | |
108 } | |
109 } | |
110 } | |
111 | |
112 PerfData::~PerfData() { | |
113 if (_name != NULL) { | |
114 FREE_C_HEAP_ARRAY(char, _name); | |
115 } | |
116 if (is_on_c_heap()) { | |
117 FREE_C_HEAP_ARRAY(PerfDataEntry, _pdep); | |
118 } | |
119 } | |
120 | |
121 void PerfData::create_entry(BasicType dtype, size_t dsize, size_t vlen) { | |
122 | |
123 size_t dlen = vlen==0 ? 1 : vlen; | |
124 | |
125 size_t namelen = strlen(name()) + 1; // include null terminator | |
126 size_t size = sizeof(PerfDataEntry) + namelen; | |
127 size_t pad_length = ((size % dsize) == 0) ? 0 : dsize - (size % dsize); | |
128 size += pad_length; | |
129 size_t data_start = size; | |
130 size += (dsize * dlen); | |
131 | |
132 // align size to assure allocation in units of 8 bytes | |
133 int align = sizeof(jlong) - 1; | |
134 size = ((size + align) & ~align); | |
135 char* psmp = PerfMemory::alloc(size); | |
136 | |
137 if (psmp == NULL) { | |
138 // out of PerfMemory memory resources. allocate on the C heap | |
139 // to avoid vm termination. | |
140 psmp = NEW_C_HEAP_ARRAY(char, size); | |
141 _on_c_heap = true; | |
142 } | |
143 | |
144 // compute the addresses for the name and data | |
145 char* cname = psmp + sizeof(PerfDataEntry); | |
146 | |
147 // data is in the last dsize*dlen bytes of the entry | |
148 void* valuep = (void*) (psmp + data_start); | |
149 | |
150 assert(is_on_c_heap() || PerfMemory::contains(cname), "just checking"); | |
151 assert(is_on_c_heap() || PerfMemory::contains((char*)valuep), "just checking"); | |
152 | |
153 // copy the name, including null terminator, into PerfData memory | |
154 strcpy(cname, name()); | |
155 | |
156 | |
157 // set the header values in PerfData memory | |
158 PerfDataEntry* pdep = (PerfDataEntry*)psmp; | |
159 pdep->entry_length = (jint)size; | |
160 pdep->name_offset = (jint) ((uintptr_t) cname - (uintptr_t) psmp); | |
161 pdep->vector_length = (jint)vlen; | |
162 pdep->data_type = (jbyte) type2char(dtype); | |
163 pdep->data_units = units(); | |
164 pdep->data_variability = variability(); | |
165 pdep->flags = (jbyte)flags(); | |
166 pdep->data_offset = (jint) data_start; | |
167 | |
168 if (PerfTraceDataCreation) { | |
169 tty->print("name = %s, dtype = %d, variability = %d," | |
170 " units = %d, dsize = %d, vlen = %d," | |
171 " pad_length = %d, size = %d, on_c_heap = %s," | |
172 " address = " INTPTR_FORMAT "," | |
173 " data address = " INTPTR_FORMAT "\n", | |
174 cname, dtype, variability(), | |
175 units(), dsize, vlen, | |
176 pad_length, size, is_on_c_heap() ? "TRUE":"FALSE", | |
177 psmp, valuep); | |
178 } | |
179 | |
180 // record the start of the entry and the location of the data field. | |
181 _pdep = pdep; | |
182 _valuep = valuep; | |
183 | |
184 // mark the PerfData memory region as having been updated. | |
185 PerfMemory::mark_updated(); | |
186 } | |
187 | |
188 PerfLong::PerfLong(CounterNS ns, const char* namep, Units u, Variability v) | |
189 : PerfData(ns, namep, u, v) { | |
190 | |
191 create_entry(T_LONG, sizeof(jlong)); | |
192 } | |
193 | |
194 int PerfLong::format(char* buffer, int length) { | |
195 return jio_snprintf(buffer, length,"%lld", *(jlong*)_valuep); | |
196 } | |
197 | |
198 PerfLongVariant::PerfLongVariant(CounterNS ns, const char* namep, Units u, | |
199 Variability v, jlong* sampled) | |
200 : PerfLong(ns, namep, u, v), | |
201 _sampled(sampled), _sample_helper(NULL) { | |
202 | |
203 sample(); | |
204 } | |
205 | |
206 PerfLongVariant::PerfLongVariant(CounterNS ns, const char* namep, Units u, | |
207 Variability v, PerfLongSampleHelper* helper) | |
208 : PerfLong(ns, namep, u, v), | |
209 _sampled(NULL), _sample_helper(helper) { | |
210 | |
211 sample(); | |
212 } | |
213 | |
214 void PerfLongVariant::sample() { | |
215 | |
216 assert(_sample_helper != NULL || _sampled != NULL, "unexpected state"); | |
217 | |
218 if (_sample_helper != NULL) { | |
219 *(jlong*)_valuep = _sample_helper->take_sample(); | |
220 } | |
221 else if (_sampled != NULL) { | |
222 *(jlong*)_valuep = *_sampled; | |
223 } | |
224 } | |
225 | |
226 PerfByteArray::PerfByteArray(CounterNS ns, const char* namep, Units u, | |
227 Variability v, jint length) | |
228 : PerfData(ns, namep, u, v), _length(length) { | |
229 | |
230 create_entry(T_BYTE, sizeof(jbyte), (size_t)_length); | |
231 } | |
232 | |
233 void PerfString::set_string(const char* s2) { | |
234 | |
235 // copy n bytes of the string, assuring the null string is | |
236 // copied if s2 == NULL. | |
237 strncpy((char *)_valuep, s2 == NULL ? "" : s2, _length); | |
238 | |
239 // assure the string is null terminated when strlen(s2) >= _length | |
240 ((char*)_valuep)[_length-1] = '\0'; | |
241 } | |
242 | |
243 int PerfString::format(char* buffer, int length) { | |
244 return jio_snprintf(buffer, length, "%s", (char*)_valuep); | |
245 } | |
246 | |
247 PerfStringConstant::PerfStringConstant(CounterNS ns, const char* namep, | |
248 const char* initial_value) | |
249 : PerfString(ns, namep, V_Constant, | |
250 initial_value == NULL ? 1 : | |
251 MIN2((jint)(strlen((char*)initial_value)+1), | |
252 (jint)(PerfMaxStringConstLength+1)), | |
253 initial_value) { | |
254 | |
255 if (PrintMiscellaneous && Verbose) { | |
256 if (is_valid() && initial_value != NULL && | |
257 ((jint)strlen(initial_value) > (jint)PerfMaxStringConstLength)) { | |
258 | |
259 warning("Truncating PerfStringConstant: name = %s," | |
260 " length = " INT32_FORMAT "," | |
261 " PerfMaxStringConstLength = " INT32_FORMAT "\n", | |
262 namep, | |
263 (jint)strlen(initial_value), | |
264 (jint)PerfMaxStringConstLength); | |
265 } | |
266 } | |
267 } | |
268 | |
269 | |
270 | |
271 | |
272 | |
273 | |
274 void PerfDataManager::destroy() { | |
275 | |
276 if (_all == NULL) | |
277 // destroy already called, or initialization never happened | |
278 return; | |
279 | |
280 for (int index = 0; index < _all->length(); index++) { | |
281 PerfData* p = _all->at(index); | |
282 delete p; | |
283 } | |
284 | |
285 delete(_all); | |
286 delete(_sampled); | |
287 delete(_constants); | |
288 | |
289 _all = NULL; | |
290 _sampled = NULL; | |
291 _constants = NULL; | |
292 } | |
293 | |
294 void PerfDataManager::add_item(PerfData* p, bool sampled) { | |
295 | |
296 MutexLocker ml(PerfDataManager_lock); | |
297 | |
298 if (_all == NULL) { | |
299 _all = new PerfDataList(100); | |
300 } | |
301 | |
302 assert(!_all->contains(p->name()), "duplicate name added"); | |
303 | |
304 // add to the list of all perf data items | |
305 _all->append(p); | |
306 | |
307 if (p->variability() == PerfData::V_Constant) { | |
308 if (_constants == NULL) { | |
309 _constants = new PerfDataList(25); | |
310 } | |
311 _constants->append(p); | |
312 return; | |
313 } | |
314 | |
315 if (sampled) { | |
316 if (_sampled == NULL) { | |
317 _sampled = new PerfDataList(25); | |
318 } | |
319 _sampled->append(p); | |
320 } | |
321 } | |
322 | |
323 PerfDataList* PerfDataManager::all() { | |
324 | |
325 MutexLocker ml(PerfDataManager_lock); | |
326 | |
327 if (_all == NULL) | |
328 return NULL; | |
329 | |
330 PerfDataList* clone = _all->clone(); | |
331 return clone; | |
332 } | |
333 | |
334 PerfDataList* PerfDataManager::sampled() { | |
335 | |
336 MutexLocker ml(PerfDataManager_lock); | |
337 | |
338 if (_sampled == NULL) | |
339 return NULL; | |
340 | |
341 PerfDataList* clone = _sampled->clone(); | |
342 return clone; | |
343 } | |
344 | |
345 PerfDataList* PerfDataManager::constants() { | |
346 | |
347 MutexLocker ml(PerfDataManager_lock); | |
348 | |
349 if (_constants == NULL) | |
350 return NULL; | |
351 | |
352 PerfDataList* clone = _constants->clone(); | |
353 return clone; | |
354 } | |
355 | |
356 char* PerfDataManager::counter_name(const char* ns, const char* name) { | |
357 assert(ns != NULL, "ns string required"); | |
358 assert(name != NULL, "name string required"); | |
359 | |
360 size_t len = strlen(ns) + strlen(name) + 2; | |
361 char* result = NEW_RESOURCE_ARRAY(char, len); | |
362 sprintf(result, "%s.%s", ns, name); | |
363 return result; | |
364 } | |
365 | |
366 char* PerfDataManager::name_space(const char* ns, const char* sub, | |
367 int instance) { | |
368 char intbuf[40]; | |
369 jio_snprintf(intbuf, 40, UINT32_FORMAT, instance); | |
370 return name_space(ns, name_space(sub, intbuf)); | |
371 } | |
372 | |
373 char *PerfDataManager::name_space(const char* ns, int instance) { | |
374 char intbuf[40]; | |
375 jio_snprintf(intbuf, 40, UINT32_FORMAT, instance); | |
376 return name_space(ns, intbuf); | |
377 } | |
378 | |
379 PerfStringConstant* PerfDataManager::create_string_constant(CounterNS ns, | |
380 const char* name, | |
381 const char* s, | |
382 TRAPS) { | |
383 | |
384 PerfStringConstant* p = new PerfStringConstant(ns, name, s); | |
385 | |
386 if (!p->is_valid()) { | |
387 // allocation of native resources failed. | |
388 delete p; | |
389 THROW_0(vmSymbols::java_lang_OutOfMemoryError()); | |
390 } | |
391 | |
392 add_item(p, false); | |
393 | |
394 return p; | |
395 } | |
396 | |
397 PerfLongConstant* PerfDataManager::create_long_constant(CounterNS ns, | |
398 const char* name, | |
399 PerfData::Units u, | |
400 jlong val, TRAPS) { | |
401 | |
402 PerfLongConstant* p = new PerfLongConstant(ns, name, u, val); | |
403 | |
404 if (!p->is_valid()) { | |
405 // allocation of native resources failed. | |
406 delete p; | |
407 THROW_0(vmSymbols::java_lang_OutOfMemoryError()); | |
408 } | |
409 | |
410 add_item(p, false); | |
411 | |
412 return p; | |
413 } | |
414 | |
415 PerfStringVariable* PerfDataManager::create_string_variable(CounterNS ns, | |
416 const char* name, | |
417 jint max_length, | |
418 const char* s, | |
419 TRAPS) { | |
420 | |
421 if (max_length == 0 && s != NULL) max_length = (jint)strlen(s); | |
422 | |
423 assert(max_length != 0, "PerfStringVariable with length 0"); | |
424 | |
425 PerfStringVariable* p = new PerfStringVariable(ns, name, max_length, s); | |
426 | |
427 if (!p->is_valid()) { | |
428 // allocation of native resources failed. | |
429 delete p; | |
430 THROW_0(vmSymbols::java_lang_OutOfMemoryError()); | |
431 } | |
432 | |
433 add_item(p, false); | |
434 | |
435 return p; | |
436 } | |
437 | |
438 PerfLongVariable* PerfDataManager::create_long_variable(CounterNS ns, | |
439 const char* name, | |
440 PerfData::Units u, | |
441 jlong ival, TRAPS) { | |
442 | |
443 PerfLongVariable* p = new PerfLongVariable(ns, name, u, ival); | |
444 | |
445 if (!p->is_valid()) { | |
446 // allocation of native resources failed. | |
447 delete p; | |
448 THROW_0(vmSymbols::java_lang_OutOfMemoryError()); | |
449 } | |
450 | |
451 add_item(p, false); | |
452 | |
453 return p; | |
454 } | |
455 | |
456 PerfLongVariable* PerfDataManager::create_long_variable(CounterNS ns, | |
457 const char* name, | |
458 PerfData::Units u, | |
459 jlong* sp, TRAPS) { | |
460 | |
461 // Sampled counters not supported if UsePerfData is false | |
462 if (!UsePerfData) return NULL; | |
463 | |
464 PerfLongVariable* p = new PerfLongVariable(ns, name, u, sp); | |
465 | |
466 if (!p->is_valid()) { | |
467 // allocation of native resources failed. | |
468 delete p; | |
469 THROW_0(vmSymbols::java_lang_OutOfMemoryError()); | |
470 } | |
471 | |
472 add_item(p, true); | |
473 | |
474 return p; | |
475 } | |
476 | |
477 PerfLongVariable* PerfDataManager::create_long_variable(CounterNS ns, | |
478 const char* name, | |
479 PerfData::Units u, | |
480 PerfSampleHelper* sh, | |
481 TRAPS) { | |
482 | |
483 // Sampled counters not supported if UsePerfData is false | |
484 if (!UsePerfData) return NULL; | |
485 | |
486 PerfLongVariable* p = new PerfLongVariable(ns, name, u, sh); | |
487 | |
488 if (!p->is_valid()) { | |
489 // allocation of native resources failed. | |
490 delete p; | |
491 THROW_0(vmSymbols::java_lang_OutOfMemoryError()); | |
492 } | |
493 | |
494 add_item(p, true); | |
495 | |
496 return p; | |
497 } | |
498 | |
499 PerfLongCounter* PerfDataManager::create_long_counter(CounterNS ns, | |
500 const char* name, | |
501 PerfData::Units u, | |
502 jlong ival, TRAPS) { | |
503 | |
504 PerfLongCounter* p = new PerfLongCounter(ns, name, u, ival); | |
505 | |
506 if (!p->is_valid()) { | |
507 // allocation of native resources failed. | |
508 delete p; | |
509 THROW_0(vmSymbols::java_lang_OutOfMemoryError()); | |
510 } | |
511 | |
512 add_item(p, false); | |
513 | |
514 return p; | |
515 } | |
516 | |
517 PerfLongCounter* PerfDataManager::create_long_counter(CounterNS ns, | |
518 const char* name, | |
519 PerfData::Units u, | |
520 jlong* sp, TRAPS) { | |
521 | |
522 // Sampled counters not supported if UsePerfData is false | |
523 if (!UsePerfData) return NULL; | |
524 | |
525 PerfLongCounter* p = new PerfLongCounter(ns, name, u, sp); | |
526 | |
527 if (!p->is_valid()) { | |
528 // allocation of native resources failed. | |
529 delete p; | |
530 THROW_0(vmSymbols::java_lang_OutOfMemoryError()); | |
531 } | |
532 | |
533 add_item(p, true); | |
534 | |
535 return p; | |
536 } | |
537 | |
538 PerfLongCounter* PerfDataManager::create_long_counter(CounterNS ns, | |
539 const char* name, | |
540 PerfData::Units u, | |
541 PerfSampleHelper* sh, | |
542 TRAPS) { | |
543 | |
544 // Sampled counters not supported if UsePerfData is false | |
545 if (!UsePerfData) return NULL; | |
546 | |
547 PerfLongCounter* p = new PerfLongCounter(ns, name, u, sh); | |
548 | |
549 if (!p->is_valid()) { | |
550 // allocation of native resources failed. | |
551 delete p; | |
552 THROW_0(vmSymbols::java_lang_OutOfMemoryError()); | |
553 } | |
554 | |
555 add_item(p, true); | |
556 | |
557 return p; | |
558 } | |
559 | |
560 PerfDataList::PerfDataList(int length) { | |
561 | |
562 _set = new(ResourceObj::C_HEAP) PerfDataArray(length, true); | |
563 } | |
564 | |
565 PerfDataList::PerfDataList(PerfDataList* p) { | |
566 | |
567 _set = new(ResourceObj::C_HEAP) PerfDataArray(p->length(), true); | |
568 | |
569 _set->appendAll(p->get_impl()); | |
570 } | |
571 | |
572 PerfDataList::~PerfDataList() { | |
573 | |
574 delete _set; | |
575 | |
576 } | |
577 | |
578 bool PerfDataList::by_name(void* name, PerfData* pd) { | |
579 | |
580 if (pd == NULL) | |
581 return false; | |
582 | |
583 return strcmp((const char*)name, pd->name()) == 0; | |
584 } | |
585 | |
586 PerfData* PerfDataList::find_by_name(const char* name) { | |
587 | |
588 int i = _set->find((void*)name, PerfDataList::by_name); | |
589 | |
590 if (i >= 0 && i <= _set->length()) | |
591 return _set->at(i); | |
592 else | |
593 return NULL; | |
594 } | |
595 | |
596 PerfDataList* PerfDataList::clone() { | |
597 | |
598 PerfDataList* copy = new PerfDataList(this); | |
599 | |
600 assert(copy != NULL, "just checking"); | |
601 | |
602 return copy; | |
603 } |