| // Copyright 2018 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef CHROME_BROWSER_METRICS_TAB_FOOTPRINT_AGGREGATOR_H_ |
| #define CHROME_BROWSER_METRICS_TAB_FOOTPRINT_AGGREGATOR_H_ |
| |
| #include <map> |
| #include <vector> |
| |
| #include "base/process/process_handle.h" |
| #include "services/metrics/public/cpp/ukm_source_id.h" |
| |
| namespace ukm { |
| class UkmRecorder; |
| } |
| |
| // Given information about which render processes are responsible for hosting |
| // the main- and sub-frames of a page instance, this class produces |
| // |Memory_TabFootprint| UKM records. |Memory_TabFootprint| records can be used |
| // to analyze and monitor the effective memory footprints that real world sites |
| // impose. |
| class TabFootprintAggregator { |
| public: |
| TabFootprintAggregator(); |
| ~TabFootprintAggregator(); |
| |
| typedef uint64_t PageId; |
| |
| // Tracks the process identified by |pid| as the host of the main-frame for |
| // the tab identified by |page_id|. |pmf_kb| should be the private memory |
| // footprint of the process. |sid| should be the source id of the tab's |
| // top-level navigation. |
| void AssociateMainFrame(ukm::SourceId sid, |
| base::ProcessId pid, |
| PageId page_id, |
| uint64_t pmf_kb); |
| |
| // Tracks the process identified by |pid| as the host of one or more |
| // sub-frames for the tab identified by |page_id|. |pmf_kb| should be the |
| // private memory footprint of the process. |sid| should be the source id of |
| // the tab's top-level navigation. |
| void AssociateSubFrame(ukm::SourceId sid, |
| base::ProcessId pid, |
| PageId page_id, |
| uint64_t pmf_kb); |
| |
| // Serializes this aggregator's current state as a collection of |
| // |Memory_TabFootprint| events which get written to the given recorder. |
| void RecordPmfs(ukm::UkmRecorder* ukm_recorder) const; |
| |
| private: |
| void AssociateFrame(ukm::SourceId sid, |
| base::ProcessId pid, |
| PageId page_id, |
| uint64_t pmf_kb); |
| |
| private: |
| // For a given tab, this tracks what renderer process hosts the main frame. |
| std::map<PageId, base::ProcessId> page_to_main_frame_process_; |
| |
| // This tracks the tabs who have a frame hosted by a given process. |
| std::map<base::ProcessId, std::vector<PageId>> process_to_pages_; |
| |
| // For a given tab, this tracks which processes host some frame in the tab. |
| std::map<PageId, std::vector<base::ProcessId>> page_to_processes_; |
| |
| // Tracks the pmf (in kilobytes) of a given process. |
| std::map<base::ProcessId, uint64_t> process_to_pmf_; |
| |
| // Tracks the main frame's |ukm::SourceId| for a given tab. Conceptually, |
| // distinct |ukm::SourceId|s correspond to distinct URLs. Note that, although |
| // multiple tabs can navigate to the same top-level URL, an individual tab |
| // can only be at a single URL at a time. |
| std::map<PageId, ukm::SourceId> page_to_source_id_; |
| }; |
| |
| #endif // CHROME_BROWSER_METRICS_TAB_FOOTPRINT_AGGREGATOR_H_ |