| // Copyright 2016 The Chromium Authors |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "chrome/browser/memory/memory_kills_monitor.h" |
| |
| #include "base/lazy_instance.h" |
| #include "base/logging.h" |
| #include "base/metrics/histogram_functions.h" |
| #include "base/threading/platform_thread.h" |
| #include "chrome/browser/browser_process.h" |
| #include "chrome/browser/memory/memory_kills_histogram.h" |
| #include "chrome/browser/memory/oom_kills_monitor.h" |
| #include "content/public/browser/browser_thread.h" |
| |
| namespace memory { |
| |
| namespace { |
| |
| base::LazyInstance<MemoryKillsMonitor>::Leaky g_memory_kills_monitor_instance = |
| LAZY_INSTANCE_INITIALIZER; |
| |
| } // namespace |
| |
| MemoryKillsMonitor::MemoryKillsMonitor() = default; |
| |
| MemoryKillsMonitor::~MemoryKillsMonitor() { |
| NOTREACHED(); |
| } |
| |
| // static |
| void MemoryKillsMonitor::Initialize() { |
| VLOG(2) << "MemoryKillsMonitor::Initializing on " |
| << base::PlatformThread::CurrentId(); |
| |
| DCHECK_CURRENTLY_ON(content::BrowserThread::UI); |
| |
| auto* login_state = ash::LoginState::Get(); |
| if (login_state) |
| login_state->AddObserver(g_memory_kills_monitor_instance.Pointer()); |
| else |
| LOG(ERROR) << "LoginState is not initialized"; |
| } |
| |
| // static |
| void MemoryKillsMonitor::LogLowMemoryKill(const std::string& type, |
| int estimated_freed_kb) { |
| DCHECK_CURRENTLY_ON(content::BrowserThread::UI); |
| |
| g_memory_kills_monitor_instance.Get().LogLowMemoryKillImpl( |
| type, estimated_freed_kb); |
| } |
| |
| void MemoryKillsMonitor::LoggedInStateChanged() { |
| VLOG(2) << "LoggedInStateChanged"; |
| auto* login_state = ash::LoginState::Get(); |
| if (login_state) { |
| // Note: LoginState never fires a notification when logged out. |
| if (login_state->IsUserLoggedIn()) { |
| VLOG(2) << "User logged in"; |
| StartMonitoring(); |
| } |
| } |
| } |
| |
| void MemoryKillsMonitor::StartMonitoring() { |
| VLOG(2) << "Starting monitor from thread " |
| << base::PlatformThread::CurrentId(); |
| |
| DCHECK_CURRENTLY_ON(content::BrowserThread::UI); |
| |
| if (monitoring_started_.IsSet()) { |
| LOG(WARNING) << "Monitoring has been started"; |
| return; |
| } |
| |
| // Insert a zero kill record at the begining of each login session for easy |
| // comparison to those with non-zero kill sessions. |
| base::UmaHistogramCustomCounts("Memory.LowMemoryKiller.Count", 0, 1, 1000, |
| 1001); |
| |
| monitoring_started_.Set(); |
| |
| // Starts the OOM kills monitor. |
| if (g_browser_process != nullptr && |
| g_browser_process->local_state() != nullptr) { |
| OOMKillsMonitor::GetInstance().Initialize(g_browser_process->local_state()); |
| } |
| } |
| |
| void MemoryKillsMonitor::LogLowMemoryKillImpl(const std::string& type, |
| int estimated_freed_kb) { |
| DCHECK_CURRENTLY_ON(content::BrowserThread::UI); |
| |
| if (!monitoring_started_.IsSet()) { |
| LOG(WARNING) << "LogLowMemoryKill before monitoring started, " |
| "skipped this log."; |
| return; |
| } |
| |
| VLOG(1) << "LOW_MEMORY_KILL_" << type; |
| |
| ++low_memory_kills_count_; |
| base::UmaHistogramCustomCounts("Memory.LowMemoryKiller.Count", |
| low_memory_kills_count_, 1, 1000, 1001); |
| |
| base::UmaHistogramMemoryKB("Memory.LowMemoryKiller.FreedSize", |
| estimated_freed_kb); |
| } |
| |
| MemoryKillsMonitor* MemoryKillsMonitor::GetForTesting() { |
| return g_memory_kills_monitor_instance.Pointer(); |
| } |
| |
| } // namespace memory |