1 // Copyright 2015 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef BASE_TRACE_EVENT_PROCESS_MEMORY_TOTALS_H_ 6 #define BASE_TRACE_EVENT_PROCESS_MEMORY_TOTALS_H_ 7 8 #include <stdint.h> 9 10 #include <map> 11 12 #include "base/base_export.h" 13 #include "base/macros.h" 14 15 namespace base { 16 namespace trace_event { 17 18 class TracedValue; 19 20 // Data model for process-wide memory stats. 21 class BASE_EXPORT ProcessMemoryTotals { 22 public: 23 ProcessMemoryTotals(); 24 ~ProcessMemoryTotals(); 25 26 // Called at trace generation time to populate the TracedValue. 27 void AsValueInto(TracedValue* value) const; 28 29 // Clears up all the data collected. 30 void Clear(); 31 resident_set_bytes()32 uint64_t resident_set_bytes() const { return resident_set_bytes_; } set_resident_set_bytes(uint64_t value)33 void set_resident_set_bytes(uint64_t value) { resident_set_bytes_ = value; } 34 peak_resident_set_bytes()35 uint64_t peak_resident_set_bytes() const { return peak_resident_set_bytes_; } set_peak_resident_set_bytes(uint64_t value)36 void set_peak_resident_set_bytes(uint64_t value) { 37 peak_resident_set_bytes_ = value; 38 } 39 40 // On some platforms (recent linux kernels, see goo.gl/sMvAVz) the peak rss 41 // can be reset. When is_peak_rss_resettable == true, the peak refers to 42 // peak from the previous measurement. When false, it is the absolute peak 43 // since the start of the process. is_peak_rss_resetable()44 bool is_peak_rss_resetable() const { return is_peak_rss_resetable_; } set_is_peak_rss_resetable(bool value)45 void set_is_peak_rss_resetable(bool value) { is_peak_rss_resetable_ = value; } 46 47 void SetExtraFieldInBytes(const char* name, uint64_t value); 48 49 private: 50 uint64_t resident_set_bytes_; 51 uint64_t peak_resident_set_bytes_; 52 bool is_peak_rss_resetable_; 53 54 // Extra metrics for OS-specific statistics. 55 std::map<const char*, uint64_t> extra_fields_; 56 57 DISALLOW_COPY_AND_ASSIGN(ProcessMemoryTotals); 58 }; 59 60 } // namespace trace_event 61 } // namespace base 62 63 #endif // BASE_TRACE_EVENT_PROCESS_MEMORY_TOTALS_H_ 64