1 /* 2 * Copyright (C) 2020 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 #ifndef SRC_TRACE_PROCESSOR_IMPORTERS_FTRACE_THREAD_STATE_TRACKER_H_ 17 #define SRC_TRACE_PROCESSOR_IMPORTERS_FTRACE_THREAD_STATE_TRACKER_H_ 18 19 #include "src/trace_processor/storage/trace_storage.h" 20 #include "src/trace_processor/types/destructible.h" 21 #include "src/trace_processor/types/trace_processor_context.h" 22 23 namespace perfetto { 24 namespace trace_processor { 25 26 // Responsible for filling the Thread State table by analysing sched switches, 27 // waking events and blocking reasons. 28 class ThreadStateTracker : public Destructible { 29 public: 30 explicit ThreadStateTracker(TraceStorage*); 31 ThreadStateTracker(const ThreadStateTracker&) = delete; 32 ThreadStateTracker& operator=(const ThreadStateTracker&) = delete; 33 ~ThreadStateTracker() override; GetOrCreate(TraceProcessorContext * context)34 static ThreadStateTracker* GetOrCreate(TraceProcessorContext* context) { 35 if (!context->thread_state_tracker) { 36 context->thread_state_tracker.reset( 37 new ThreadStateTracker(context->storage.get())); 38 } 39 return static_cast<ThreadStateTracker*>( 40 context->thread_state_tracker.get()); 41 } 42 43 // Will cause addition of state and update of the previous state for next_utid 44 // and prev_utid. 45 void PushSchedSwitchEvent(int64_t event_ts, 46 uint32_t cpu, 47 UniqueTid prev_utid, 48 StringId prev_state, 49 UniqueTid next_utid); 50 51 // Will add a runnable state for utid and close the previously blocked one. 52 void PushWakingEvent(int64_t event_ts, UniqueTid utid, UniqueTid waker_utid); 53 54 // Will add a runnable state for utid. For a new task there are no previous 55 // states to close. 56 void PushNewTaskEvent(int64_t event_ts, UniqueTid utid, UniqueTid waker_utid); 57 58 // Updates the current blocked state for utid with blocked reason. 59 void PushBlockedReason(UniqueTid utid, 60 std::optional<bool> io_wait, 61 std::optional<StringId> blocked_function); 62 63 private: 64 void AddOpenState(int64_t ts, 65 UniqueTid utid, 66 StringId state, 67 std::optional<uint32_t> cpu = std::nullopt, 68 std::optional<UniqueTid> waker_utid = std::nullopt); 69 void ClosePendingState(int64_t end_ts, UniqueTid utid, bool data_loss); 70 71 bool IsRunning(StringId state); 72 bool IsBlocked(StringId state); 73 bool IsRunnable(StringId state); 74 HasPreviousRowNumbersForUtid(UniqueTid utid)75 bool HasPreviousRowNumbersForUtid(UniqueTid utid) { 76 return utid < prev_row_numbers_for_thread_.size() && 77 prev_row_numbers_for_thread_[utid].has_value(); 78 } 79 RowNumToRef(tables::ThreadStateTable::RowNumber row_number)80 tables::ThreadStateTable::RowReference RowNumToRef( 81 tables::ThreadStateTable::RowNumber row_number) { 82 return row_number.ToRowReference(storage_->mutable_thread_state_table()); 83 } 84 85 TraceStorage* const storage_; 86 87 // Strings 88 StringId running_string_id_; 89 StringId runnable_string_id_; 90 91 struct RelatedRows { 92 std::optional<tables::ThreadStateTable::RowNumber> last_blocked_row; 93 tables::ThreadStateTable::RowNumber last_row; 94 }; 95 96 std::vector<std::optional<RelatedRows>> prev_row_numbers_for_thread_; 97 }; 98 } // namespace trace_processor 99 } // namespace perfetto 100 101 #endif // SRC_TRACE_PROCESSOR_IMPORTERS_FTRACE_THREAD_STATE_TRACKER_H_ 102