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1 // Copyright 2012 the V8 project authors. All rights reserved. | 1 // Copyright 2012 the V8 project authors. All rights reserved. |
2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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365 } | 365 } |
366 | 366 |
367 | 367 |
368 void ProfileTree::ShortPrint() { | 368 void ProfileTree::ShortPrint() { |
369 OS::Print("root: %u %u %.2fms %.2fms\n", | 369 OS::Print("root: %u %u %.2fms %.2fms\n", |
370 root_->total_ticks(), root_->self_ticks(), | 370 root_->total_ticks(), root_->self_ticks(), |
371 root_->GetTotalMillis(), root_->GetSelfMillis()); | 371 root_->GetTotalMillis(), root_->GetSelfMillis()); |
372 } | 372 } |
373 | 373 |
374 | 374 |
375 CpuProfile::CpuProfile(const char* title, unsigned uid, bool record_samples) | |
376 : title_(title), | |
377 uid_(uid), | |
378 record_samples_(record_samples), | |
379 start_time_ms_(OS::TimeCurrentMillis()), | |
380 end_time_ms_(0) { | |
381 } | |
382 | |
383 | |
384 void CpuProfile::AddPath(const Vector<CodeEntry*>& path) { | 375 void CpuProfile::AddPath(const Vector<CodeEntry*>& path) { |
385 ProfileNode* top_frame_node = top_down_.AddPathFromEnd(path); | 376 ProfileNode* top_frame_node = top_down_.AddPathFromEnd(path); |
386 if (record_samples_) samples_.Add(top_frame_node); | 377 if (record_samples_) samples_.Add(top_frame_node); |
387 } | 378 } |
388 | 379 |
389 | 380 |
390 void CpuProfile::CalculateTotalTicksAndSamplingRate() { | 381 void CpuProfile::CalculateTotalTicks() { |
391 end_time_ms_ = OS::TimeCurrentMillis(); | |
392 top_down_.CalculateTotalTicks(); | 382 top_down_.CalculateTotalTicks(); |
393 | |
394 double duration = end_time_ms_ - start_time_ms_; | |
395 if (duration < 1) duration = 1; | |
396 unsigned ticks = top_down_.root()->total_ticks(); | |
397 double rate = ticks / duration; | |
398 top_down_.SetTickRatePerMs(rate); | |
399 } | 383 } |
400 | 384 |
401 | 385 |
| 386 void CpuProfile::SetActualSamplingRate(double actual_sampling_rate) { |
| 387 top_down_.SetTickRatePerMs(actual_sampling_rate); |
| 388 } |
| 389 |
| 390 |
402 void CpuProfile::ShortPrint() { | 391 void CpuProfile::ShortPrint() { |
403 OS::Print("top down "); | 392 OS::Print("top down "); |
404 top_down_.ShortPrint(); | 393 top_down_.ShortPrint(); |
405 } | 394 } |
406 | 395 |
407 | 396 |
408 void CpuProfile::Print() { | 397 void CpuProfile::Print() { |
409 OS::Print("[Top down]:\n"); | 398 OS::Print("[Top down]:\n"); |
410 top_down_.Print(); | 399 top_down_.Print(); |
411 } | 400 } |
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533 current_profiles_semaphore_->Signal(); | 522 current_profiles_semaphore_->Signal(); |
534 return false; | 523 return false; |
535 } | 524 } |
536 } | 525 } |
537 current_profiles_.Add(new CpuProfile(title, uid, record_samples)); | 526 current_profiles_.Add(new CpuProfile(title, uid, record_samples)); |
538 current_profiles_semaphore_->Signal(); | 527 current_profiles_semaphore_->Signal(); |
539 return true; | 528 return true; |
540 } | 529 } |
541 | 530 |
542 | 531 |
543 CpuProfile* CpuProfilesCollection::StopProfiling(const char* title) { | 532 CpuProfile* CpuProfilesCollection::StopProfiling(const char* title, |
| 533 double actual_sampling_rate) { |
544 const int title_len = StrLength(title); | 534 const int title_len = StrLength(title); |
545 CpuProfile* profile = NULL; | 535 CpuProfile* profile = NULL; |
546 current_profiles_semaphore_->Wait(); | 536 current_profiles_semaphore_->Wait(); |
547 for (int i = current_profiles_.length() - 1; i >= 0; --i) { | 537 for (int i = current_profiles_.length() - 1; i >= 0; --i) { |
548 if (title_len == 0 || strcmp(current_profiles_[i]->title(), title) == 0) { | 538 if (title_len == 0 || strcmp(current_profiles_[i]->title(), title) == 0) { |
549 profile = current_profiles_.Remove(i); | 539 profile = current_profiles_.Remove(i); |
550 break; | 540 break; |
551 } | 541 } |
552 } | 542 } |
553 current_profiles_semaphore_->Signal(); | 543 current_profiles_semaphore_->Signal(); |
554 | 544 |
555 if (profile == NULL) return NULL; | 545 if (profile == NULL) return NULL; |
556 profile->CalculateTotalTicksAndSamplingRate(); | 546 profile->CalculateTotalTicks(); |
| 547 profile->SetActualSamplingRate(actual_sampling_rate); |
557 finished_profiles_.Add(profile); | 548 finished_profiles_.Add(profile); |
558 return profile; | 549 return profile; |
559 } | 550 } |
560 | 551 |
561 | 552 |
562 bool CpuProfilesCollection::IsLastProfile(const char* title) { | 553 bool CpuProfilesCollection::IsLastProfile(const char* title) { |
563 // Called from VM thread, and only it can mutate the list, | 554 // Called from VM thread, and only it can mutate the list, |
564 // so no locking is needed here. | 555 // so no locking is needed here. |
565 if (current_profiles_.length() != 1) return false; | 556 if (current_profiles_.length() != 1) return false; |
566 return StrLength(title) == 0 | 557 return StrLength(title) == 0 |
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603 CodeEntry* code_entry = new CodeEntry(tag, | 594 CodeEntry* code_entry = new CodeEntry(tag, |
604 name, | 595 name, |
605 name_prefix, | 596 name_prefix, |
606 resource_name, | 597 resource_name, |
607 line_number); | 598 line_number); |
608 code_entries_.Add(code_entry); | 599 code_entries_.Add(code_entry); |
609 return code_entry; | 600 return code_entry; |
610 } | 601 } |
611 | 602 |
612 | 603 |
| 604 void SampleRateCalculator::Tick() { |
| 605 if (--wall_time_query_countdown_ == 0) |
| 606 UpdateMeasurements(OS::TimeCurrentMillis()); |
| 607 } |
| 608 |
| 609 |
| 610 void SampleRateCalculator::UpdateMeasurements(double current_time) { |
| 611 if (measurements_count_++ != 0) { |
| 612 const double measured_ticks_per_ms = |
| 613 (kWallTimeQueryIntervalMs * ticks_per_ms_) / |
| 614 (current_time - last_wall_time_); |
| 615 // Update the average value. |
| 616 ticks_per_ms_ += |
| 617 (measured_ticks_per_ms - ticks_per_ms_) / measurements_count_; |
| 618 // Update the externally accessible result. |
| 619 result_ = static_cast<AtomicWord>(ticks_per_ms_ * kResultScale); |
| 620 } |
| 621 last_wall_time_ = current_time; |
| 622 wall_time_query_countdown_ = |
| 623 static_cast<unsigned>(kWallTimeQueryIntervalMs * ticks_per_ms_); |
| 624 } |
| 625 |
| 626 |
613 const char* const ProfileGenerator::kAnonymousFunctionName = | 627 const char* const ProfileGenerator::kAnonymousFunctionName = |
614 "(anonymous function)"; | 628 "(anonymous function)"; |
615 const char* const ProfileGenerator::kProgramEntryName = | 629 const char* const ProfileGenerator::kProgramEntryName = |
616 "(program)"; | 630 "(program)"; |
617 const char* const ProfileGenerator::kGarbageCollectorEntryName = | 631 const char* const ProfileGenerator::kGarbageCollectorEntryName = |
618 "(garbage collector)"; | 632 "(garbage collector)"; |
619 const char* const ProfileGenerator::kUnresolvedFunctionName = | 633 const char* const ProfileGenerator::kUnresolvedFunctionName = |
620 "(unresolved function)"; | 634 "(unresolved function)"; |
621 | 635 |
622 | 636 |
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703 if (no_symbolized_entries) { | 717 if (no_symbolized_entries) { |
704 *entry++ = EntryForVMState(sample.state); | 718 *entry++ = EntryForVMState(sample.state); |
705 } | 719 } |
706 } | 720 } |
707 | 721 |
708 profiles_->AddPathToCurrentProfiles(entries); | 722 profiles_->AddPathToCurrentProfiles(entries); |
709 } | 723 } |
710 | 724 |
711 | 725 |
712 } } // namespace v8::internal | 726 } } // namespace v8::internal |
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