Mercurial > jdk8-mips64-public > hotspot / file comparison

comparison: src/share/vm/runtime/perfData.cpp

src/share/vm/runtime/perfData.cpp

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1 /*
2 * Copyright (c) 2001, 2014, Oracle and/or its affiliates. All rights reserved.
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 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
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"
36
37 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
38
39 PerfDataList* PerfDataManager::_all = NULL;
40 PerfDataList* PerfDataManager::_sampled = NULL;
41 PerfDataList* PerfDataManager::_constants = NULL;
42
43 /*
44 * The jvmstat global and subsysem jvmstat counter name spaces. The top
45 * level name spaces imply the interface stability level of the counter,
46 * which generally follows the Java package, class, and property naming
47 * conventions. The CounterNS enumeration values should be used to index
48 * into this array.
49 */
50 const char* PerfDataManager::_name_spaces[] = {
51 // top level name spaces
52 "java", // stable and supported name space
53 "com.sun", // unstable but supported name space
54 "sun", // unstable and unsupported name space
55 // subsystem name spaces
56 "java.gc", // Garbage Collection name spaces
57 "com.sun.gc",
58 "sun.gc",
59 "java.ci", // Compiler name spaces
60 "com.sun.ci",
61 "sun.ci",
62 "java.cls", // Class Loader name spaces
63 "com.sun.cls",
64 "sun.cls",
65 "java.rt", // Runtime name spaces
66 "com.sun.rt",
67 "sun.rt",
68 "java.os", // Operating System name spaces
69 "com.sun.os",
70 "sun.os",
71 "java.threads", // Threads System name spaces
72 "com.sun.threads",
73 "sun.threads",
74 "java.property", // Java Property name spaces
75 "com.sun.property",
76 "sun.property",
77 "",
78 };
79
80 PerfData::PerfData(CounterNS ns, const char* name, Units u, Variability v)
81 : _name(NULL), _u(u), _v(v), _valuep(NULL),
82 _on_c_heap(false) {
83
84 const char* prefix = PerfDataManager::ns_to_string(ns);
85
86 _name = NEW_C_HEAP_ARRAY(char, strlen(name) + strlen(prefix) + 2, mtInternal);
87 assert(_name != NULL && strlen(name) != 0, "invalid name");
88
89 if (ns == NULL_NS) {
90 // No prefix is added to counters with the NULL_NS namespace.
91 strcpy(_name, name);
92 // set the F_Supported flag based on the counter name prefix.
93 if (PerfDataManager::is_stable_supported(_name) ||
94 PerfDataManager::is_unstable_supported(_name)) {
95 _flags = F_Supported;
96 }
97 else {
98 _flags = F_None;
99 }
100 }
101 else {
102 sprintf(_name, "%s.%s", prefix, name);
103 // set the F_Supported flag based on the given namespace.
104 if (PerfDataManager::is_stable_supported(ns) ||
105 PerfDataManager::is_unstable_supported(ns)) {
106 _flags = F_Supported;
107 }
108 else {
109 _flags = F_None;
110 }
111 }
112 }
113
114 PerfData::~PerfData() {
115 if (_name != NULL) {
116 FREE_C_HEAP_ARRAY(char, _name, mtInternal);
117 }
118 if (is_on_c_heap()) {
119 FREE_C_HEAP_ARRAY(PerfDataEntry, _pdep, mtInternal);
120 }
121 }
122
123 void PerfData::create_entry(BasicType dtype, size_t dsize, size_t vlen) {
124
125 size_t dlen = vlen==0 ? 1 : vlen;
126
127 size_t namelen = strlen(name()) + 1; // include null terminator
128 size_t size = sizeof(PerfDataEntry) + namelen;
129 size_t pad_length = ((size % dsize) == 0) ? 0 : dsize - (size % dsize);
130 size += pad_length;
131 size_t data_start = size;
132 size += (dsize * dlen);
133
134 // align size to assure allocation in units of 8 bytes
135 int align = sizeof(jlong) - 1;
136 size = ((size + align) & ~align);
137 char* psmp = PerfMemory::alloc(size);
138
139 if (psmp == NULL) {
140 // out of PerfMemory memory resources. allocate on the C heap
141 // to avoid vm termination.
142 psmp = NEW_C_HEAP_ARRAY(char, size, mtInternal);
143 _on_c_heap = true;
144 }
145
146 // compute the addresses for the name and data
147 char* cname = psmp + sizeof(PerfDataEntry);
148
149 // data is in the last dsize*dlen bytes of the entry
150 void* valuep = (void*) (psmp + data_start);
151
152 assert(is_on_c_heap() || PerfMemory::contains(cname), "just checking");
153 assert(is_on_c_heap() || PerfMemory::contains((char*)valuep), "just checking");
154
155 // copy the name, including null terminator, into PerfData memory
156 strcpy(cname, name());
157
158
159 // set the header values in PerfData memory
160 PerfDataEntry* pdep = (PerfDataEntry*)psmp;
161 pdep->entry_length = (jint)size;
162 pdep->name_offset = (jint) ((uintptr_t) cname - (uintptr_t) psmp);
163 pdep->vector_length = (jint)vlen;
164 pdep->data_type = (jbyte) type2char(dtype);
165 pdep->data_units = units();
166 pdep->data_variability = variability();
167 pdep->flags = (jbyte)flags();
168 pdep->data_offset = (jint) data_start;
169
170 if (PerfTraceDataCreation) {
171 tty->print("name = %s, dtype = %d, variability = %d,"
172 " units = %d, dsize = %d, vlen = %d,"
173 " pad_length = %d, size = %d, on_c_heap = %s,"
174 " address = " INTPTR_FORMAT ","
175 " data address = " INTPTR_FORMAT "\n",
176 cname, dtype, variability(),
177 units(), dsize, vlen,
178 pad_length, size, is_on_c_heap() ? "TRUE":"FALSE",
179 psmp, valuep);
180 }
181
182 // record the start of the entry and the location of the data field.
183 _pdep = pdep;
184 _valuep = valuep;
185
186 // mark the PerfData memory region as having been updated.
187 PerfMemory::mark_updated();
188 }
189
190 PerfLong::PerfLong(CounterNS ns, const char* namep, Units u, Variability v)
191 : PerfData(ns, namep, u, v) {
192
193 create_entry(T_LONG, sizeof(jlong));
194 }
195
196 int PerfLong::format(char* buffer, int length) {
197 return jio_snprintf(buffer, length, JLONG_FORMAT, *(jlong*)_valuep);
198 }
199
200 PerfLongVariant::PerfLongVariant(CounterNS ns, const char* namep, Units u,
201 Variability v, jlong* sampled)
202 : PerfLong(ns, namep, u, v),
203 _sampled(sampled), _sample_helper(NULL) {
204
205 sample();
206 }
207
208 PerfLongVariant::PerfLongVariant(CounterNS ns, const char* namep, Units u,
209 Variability v, PerfLongSampleHelper* helper)
210 : PerfLong(ns, namep, u, v),
211 _sampled(NULL), _sample_helper(helper) {
212
213 sample();
214 }
215
216 void PerfLongVariant::sample() {
217
218 // JJJ - This should not happen. Maybe the first sample is taken
219 // while the _sample_helper is being null'ed out.
220 // assert(_sample_helper != NULL || _sampled != NULL, "unexpected state");
221 if (_sample_helper == NULL) return;
222
223 if (_sample_helper != NULL) {
224 *(jlong*)_valuep = _sample_helper->take_sample();
225 }
226 else if (_sampled != NULL) {
227 *(jlong*)_valuep = *_sampled;
228 }
229 }
230
231 PerfByteArray::PerfByteArray(CounterNS ns, const char* namep, Units u,
232 Variability v, jint length)
233 : PerfData(ns, namep, u, v), _length(length) {
234
235 create_entry(T_BYTE, sizeof(jbyte), (size_t)_length);
236 }
237
238 void PerfString::set_string(const char* s2) {
239
240 // copy n bytes of the string, assuring the null string is
241 // copied if s2 == NULL.
242 strncpy((char *)_valuep, s2 == NULL ? "" : s2, _length);
243
244 // assure the string is null terminated when strlen(s2) >= _length
245 ((char*)_valuep)[_length-1] = '\0';
246 }
247
248 int PerfString::format(char* buffer, int length) {
249 return jio_snprintf(buffer, length, "%s", (char*)_valuep);
250 }
251
252 PerfStringConstant::PerfStringConstant(CounterNS ns, const char* namep,
253 const char* initial_value)
254 : PerfString(ns, namep, V_Constant,
255 initial_value == NULL ? 1 :
256 MIN2((jint)(strlen((char*)initial_value)+1),
257 (jint)(PerfMaxStringConstLength+1)),
258 initial_value) {
259
260 if (PrintMiscellaneous && Verbose) {
261 if (is_valid() && initial_value != NULL &&
262 ((jint)strlen(initial_value) > (jint)PerfMaxStringConstLength)) {
263
264 warning("Truncating PerfStringConstant: name = %s,"
265 " length = " INT32_FORMAT ","
266 " PerfMaxStringConstLength = " INT32_FORMAT "\n",
267 namep,
268 (jint)strlen(initial_value),
269 (jint)PerfMaxStringConstLength);
270 }
271 }
272 }
273
274
275
276
277
278
279 void PerfDataManager::destroy() {
280
281 if (_all == NULL)
282 // destroy already called, or initialization never happened
283 return;
284
285 for (int index = 0; index < _all->length(); index++) {
286 PerfData* p = _all->at(index);
287 delete p;
288 }
289
290 delete(_all);
291 delete(_sampled);
292 delete(_constants);
293
294 _all = NULL;
295 _sampled = NULL;
296 _constants = NULL;
297 }
298
299 void PerfDataManager::add_item(PerfData* p, bool sampled) {
300
301 MutexLocker ml(PerfDataManager_lock);
302
303 if (_all == NULL) {
304 _all = new PerfDataList(100);
305 }
306
307 assert(!_all->contains(p->name()), "duplicate name added");
308
309 // add to the list of all perf data items
310 _all->append(p);
311
312 if (p->variability() == PerfData::V_Constant) {
313 if (_constants == NULL) {
314 _constants = new PerfDataList(25);
315 }
316 _constants->append(p);
317 return;
318 }
319
320 if (sampled) {
321 if (_sampled == NULL) {
322 _sampled = new PerfDataList(25);
323 }
324 _sampled->append(p);
325 }
326 }
327
328 PerfData* PerfDataManager::find_by_name(const char* name) {
329 return _all->find_by_name(name);
330 }
331
332 PerfDataList* PerfDataManager::all() {
333
334 MutexLocker ml(PerfDataManager_lock);
335
336 if (_all == NULL)
337 return NULL;
338
339 PerfDataList* clone = _all->clone();
340 return clone;
341 }
342
343 PerfDataList* PerfDataManager::sampled() {
344
345 MutexLocker ml(PerfDataManager_lock);
346
347 if (_sampled == NULL)
348 return NULL;
349
350 PerfDataList* clone = _sampled->clone();
351 return clone;
352 }
353
354 PerfDataList* PerfDataManager::constants() {
355
356 MutexLocker ml(PerfDataManager_lock);
357
358 if (_constants == NULL)
359 return NULL;
360
361 PerfDataList* clone = _constants->clone();
362 return clone;
363 }
364
365 char* PerfDataManager::counter_name(const char* ns, const char* name) {
366 assert(ns != NULL, "ns string required");
367 assert(name != NULL, "name string required");
368
369 size_t len = strlen(ns) + strlen(name) + 2;
370 char* result = NEW_RESOURCE_ARRAY(char, len);
371 sprintf(result, "%s.%s", ns, name);
372 return result;
373 }
374
375 char* PerfDataManager::name_space(const char* ns, const char* sub,
376 int instance) {
377 char intbuf[40];
378 jio_snprintf(intbuf, 40, UINT32_FORMAT, instance);
379 return name_space(ns, name_space(sub, intbuf));
380 }
381
382 char *PerfDataManager::name_space(const char* ns, int instance) {
383 char intbuf[40];
384 jio_snprintf(intbuf, 40, UINT32_FORMAT, instance);
385 return name_space(ns, intbuf);
386 }
387
388 PerfStringConstant* PerfDataManager::create_string_constant(CounterNS ns,
389 const char* name,
390 const char* s,
391 TRAPS) {
392
393 PerfStringConstant* p = new PerfStringConstant(ns, name, s);
394
395 if (!p->is_valid()) {
396 // allocation of native resources failed.
397 delete p;
398 THROW_0(vmSymbols::java_lang_OutOfMemoryError());
399 }
400
401 add_item(p, false);
402
403 return p;
404 }
405
406 PerfLongConstant* PerfDataManager::create_long_constant(CounterNS ns,
407 const char* name,
408 PerfData::Units u,
409 jlong val, TRAPS) {
410
411 PerfLongConstant* p = new PerfLongConstant(ns, name, u, val);
412
413 if (!p->is_valid()) {
414 // allocation of native resources failed.
415 delete p;
416 THROW_0(vmSymbols::java_lang_OutOfMemoryError());
417 }
418
419 add_item(p, false);
420
421 return p;
422 }
423
424 PerfStringVariable* PerfDataManager::create_string_variable(CounterNS ns,
425 const char* name,
426 jint max_length,
427 const char* s,
428 TRAPS) {
429
430 if (max_length == 0 && s != NULL) max_length = (jint)strlen(s);
431
432 assert(max_length != 0, "PerfStringVariable with length 0");
433
434 PerfStringVariable* p = new PerfStringVariable(ns, name, max_length, s);
435
436 if (!p->is_valid()) {
437 // allocation of native resources failed.
438 delete p;
439 THROW_0(vmSymbols::java_lang_OutOfMemoryError());
440 }
441
442 add_item(p, false);
443
444 return p;
445 }
446
447 PerfLongVariable* PerfDataManager::create_long_variable(CounterNS ns,
448 const char* name,
449 PerfData::Units u,
450 jlong ival, TRAPS) {
451
452 PerfLongVariable* p = new PerfLongVariable(ns, name, u, ival);
453
454 if (!p->is_valid()) {
455 // allocation of native resources failed.
456 delete p;
457 THROW_0(vmSymbols::java_lang_OutOfMemoryError());
458 }
459
460 add_item(p, false);
461
462 return p;
463 }
464
465 PerfLongVariable* PerfDataManager::create_long_variable(CounterNS ns,
466 const char* name,
467 PerfData::Units u,
468 jlong* sp, TRAPS) {
469
470 // Sampled counters not supported if UsePerfData is false
471 if (!UsePerfData) return NULL;
472
473 PerfLongVariable* p = new PerfLongVariable(ns, name, u, sp);
474
475 if (!p->is_valid()) {
476 // allocation of native resources failed.
477 delete p;
478 THROW_0(vmSymbols::java_lang_OutOfMemoryError());
479 }
480
481 add_item(p, true);
482
483 return p;
484 }
485
486 PerfLongVariable* PerfDataManager::create_long_variable(CounterNS ns,
487 const char* name,
488 PerfData::Units u,
489 PerfSampleHelper* sh,
490 TRAPS) {
491
492 // Sampled counters not supported if UsePerfData is false
493 if (!UsePerfData) return NULL;
494
495 PerfLongVariable* p = new PerfLongVariable(ns, name, u, sh);
496
497 if (!p->is_valid()) {
498 // allocation of native resources failed.
499 delete p;
500 THROW_0(vmSymbols::java_lang_OutOfMemoryError());
501 }
502
503 add_item(p, true);
504
505 return p;
506 }
507
508 PerfLongCounter* PerfDataManager::create_long_counter(CounterNS ns,
509 const char* name,
510 PerfData::Units u,
511 jlong ival, TRAPS) {
512
513 PerfLongCounter* p = new PerfLongCounter(ns, name, u, ival);
514
515 if (!p->is_valid()) {
516 // allocation of native resources failed.
517 delete p;
518 THROW_0(vmSymbols::java_lang_OutOfMemoryError());
519 }
520
521 add_item(p, false);
522
523 return p;
524 }
525
526 PerfLongCounter* PerfDataManager::create_long_counter(CounterNS ns,
527 const char* name,
528 PerfData::Units u,
529 jlong* sp, TRAPS) {
530
531 // Sampled counters not supported if UsePerfData is false
532 if (!UsePerfData) return NULL;
533
534 PerfLongCounter* p = new PerfLongCounter(ns, name, u, sp);
535
536 if (!p->is_valid()) {
537 // allocation of native resources failed.
538 delete p;
539 THROW_0(vmSymbols::java_lang_OutOfMemoryError());
540 }
541
542 add_item(p, true);
543
544 return p;
545 }
546
547 PerfLongCounter* PerfDataManager::create_long_counter(CounterNS ns,
548 const char* name,
549 PerfData::Units u,
550 PerfSampleHelper* sh,
551 TRAPS) {
552
553 // Sampled counters not supported if UsePerfData is false
554 if (!UsePerfData) return NULL;
555
556 PerfLongCounter* p = new PerfLongCounter(ns, name, u, sh);
557
558 if (!p->is_valid()) {
559 // allocation of native resources failed.
560 delete p;
561 THROW_0(vmSymbols::java_lang_OutOfMemoryError());
562 }
563
564 add_item(p, true);
565
566 return p;
567 }
568
569 PerfDataList::PerfDataList(int length) {
570
571 _set = new(ResourceObj::C_HEAP, mtInternal) PerfDataArray(length, true);
572 }
573
574 PerfDataList::PerfDataList(PerfDataList* p) {
575
576 _set = new(ResourceObj::C_HEAP, mtInternal) PerfDataArray(p->length(), true);
577
578 _set->appendAll(p->get_impl());
579 }
580
581 PerfDataList::~PerfDataList() {
582
583 delete _set;
584
585 }
586
587 bool PerfDataList::by_name(void* name, PerfData* pd) {
588
589 if (pd == NULL)
590 return false;
591
592 return strcmp((const char*)name, pd->name()) == 0;
593 }
594
595 PerfData* PerfDataList::find_by_name(const char* name) {
596
597 // if add_item hasn't been called the list won't be initialized
598 if (this == NULL)
599 return NULL;
600
601 int i = _set->find((void*)name, PerfDataList::by_name);
602
603 if (i >= 0 && i <= _set->length())
604 return _set->at(i);
605 else
606 return NULL;
607 }
608
609 PerfDataList* PerfDataList::clone() {
610
611 PerfDataList* copy = new PerfDataList(this);
612
613 assert(copy != NULL, "just checking");
614
615 return copy;
616 }

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