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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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1378 | 1378 |
1379 inline void AllocationSite::IncrementMementoCreateCount() { | 1379 inline void AllocationSite::IncrementMementoCreateCount() { |
1380 ASSERT(FLAG_allocation_site_pretenuring); | 1380 ASSERT(FLAG_allocation_site_pretenuring); |
1381 int value = memento_create_count()->value(); | 1381 int value = memento_create_count()->value(); |
1382 set_memento_create_count(Smi::FromInt(value + 1)); | 1382 set_memento_create_count(Smi::FromInt(value + 1)); |
1383 } | 1383 } |
1384 | 1384 |
1385 | 1385 |
1386 inline bool AllocationSite::DigestPretenuringFeedback() { | 1386 inline bool AllocationSite::DigestPretenuringFeedback() { |
1387 bool decision_made = false; | 1387 bool decision_made = false; |
1388 if (!PretenuringDecisionMade()) { | 1388 int create_count = memento_create_count()->value(); |
1389 int create_count = memento_create_count()->value(); | 1389 if (create_count >= kPretenureMinimumCreated) { |
1390 if (create_count >= kPretenureMinimumCreated) { | 1390 int found_count = memento_found_count()->value(); |
1391 int found_count = memento_found_count()->value(); | 1391 double ratio = static_cast<double>(found_count) / create_count; |
1392 double ratio = static_cast<double>(found_count) / create_count; | 1392 if (FLAG_trace_track_allocation_sites) { |
1393 if (FLAG_trace_track_allocation_sites) { | 1393 PrintF("AllocationSite: %p (created, found, ratio) (%d, %d, %f)\n", |
1394 PrintF("AllocationSite: %p (created, found, ratio) (%d, %d, %f)\n", | 1394 static_cast<void*>(this), create_count, found_count, ratio); |
1395 static_cast<void*>(this), create_count, found_count, ratio); | 1395 } |
1396 } | 1396 int current_mode = GetPretenureMode(); |
1397 int result = ratio >= kPretenureRatio ? kTenure : kDontTenure; | 1397 int result = ratio >= kPretenureRatio ? kTenure : kDontTenure; |
1398 set_pretenure_decision(Smi::FromInt(result)); | 1398 set_pretenure_decision(Smi::FromInt(result)); |
1399 decision_made = true; | 1399 decision_made = true; |
1400 // TODO(mvstanton): if the decision represents a change, any dependent | 1400 if (current_mode != GetPretenureMode()) { |
1401 // code registered for pretenuring changes should be deopted. | 1401 dependent_code()->DeoptimizeDependentCodeGroup( |
| 1402 GetIsolate(), |
| 1403 DependentCode::kAllocationSiteTenuringChangedGroup); |
1402 } | 1404 } |
1403 } | 1405 } |
1404 | 1406 |
1405 // Clear feedback calculation fields until the next gc. | 1407 // Clear feedback calculation fields until the next gc. |
1406 set_memento_found_count(Smi::FromInt(0)); | 1408 set_memento_found_count(Smi::FromInt(0)); |
1407 set_memento_create_count(Smi::FromInt(0)); | 1409 set_memento_create_count(Smi::FromInt(0)); |
1408 return decision_made; | 1410 return decision_made; |
1409 } | 1411 } |
1410 | 1412 |
1411 | 1413 |
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6475 #undef WRITE_UINT32_FIELD | 6477 #undef WRITE_UINT32_FIELD |
6476 #undef READ_SHORT_FIELD | 6478 #undef READ_SHORT_FIELD |
6477 #undef WRITE_SHORT_FIELD | 6479 #undef WRITE_SHORT_FIELD |
6478 #undef READ_BYTE_FIELD | 6480 #undef READ_BYTE_FIELD |
6479 #undef WRITE_BYTE_FIELD | 6481 #undef WRITE_BYTE_FIELD |
6480 | 6482 |
6481 | 6483 |
6482 } } // namespace v8::internal | 6484 } } // namespace v8::internal |
6483 | 6485 |
6484 #endif // V8_OBJECTS_INL_H_ | 6486 #endif // V8_OBJECTS_INL_H_ |
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