Index: base/timer/hi_res_timer_manager_win.cc |
diff --git a/base/timer/hi_res_timer_manager_win.cc b/base/timer/hi_res_timer_manager_win.cc |
index 692f72b4e594481897bf022e256d51bb65b1f1b9..5474373e1bd935129bde3c1dcf11a6d132205d8e 100644 |
--- a/base/timer/hi_res_timer_manager_win.cc |
+++ b/base/timer/hi_res_timer_manager_win.cc |
@@ -4,21 +4,44 @@ |
#include "base/timer/hi_res_timer_manager.h" |
+#include <algorithm> |
+ |
+#include "base/atomicops.h" |
+#include "base/metrics/histogram_macros.h" |
#include "base/power_monitor/power_monitor.h" |
+#include "base/task_scheduler/post_task.h" |
#include "base/time/time.h" |
namespace base { |
+namespace { |
+ |
+constexpr TimeDelta kUsageSampleInterval = TimeDelta::FromMinutes(10); |
+ |
+void ReportHighResolutionTimerUsage() { |
+ UMA_HISTOGRAM_PERCENTAGE("Windows.HighResolutionTimerUsage", |
+ Time::GetHighResolutionTimerUsage()); |
+ // Reset usage for the next interval. |
+ Time::ResetHighResolutionTimerUsage(); |
+} |
+ |
+} // namespace |
+ |
HighResolutionTimerManager::HighResolutionTimerManager() |
: hi_res_clock_available_(false) { |
- base::PowerMonitor* power_monitor = base::PowerMonitor::Get(); |
+ PowerMonitor* power_monitor = PowerMonitor::Get(); |
DCHECK(power_monitor != NULL); |
power_monitor->AddObserver(this); |
UseHiResClock(!power_monitor->IsOnBatteryPower()); |
+ |
+ // Start polling the high resolution timer usage. |
+ Time::ResetHighResolutionTimerUsage(); |
+ timer_.Start(FROM_HERE, kUsageSampleInterval, |
+ Bind(&ReportHighResolutionTimerUsage)); |
} |
HighResolutionTimerManager::~HighResolutionTimerManager() { |
- base::PowerMonitor::Get()->RemoveObserver(this); |
+ PowerMonitor::Get()->RemoveObserver(this); |
UseHiResClock(false); |
} |
@@ -26,11 +49,22 @@ void HighResolutionTimerManager::OnPowerStateChange(bool on_battery_power) { |
UseHiResClock(!on_battery_power); |
} |
+void HighResolutionTimerManager::OnSuspend() { |
+ // Stop polling the usage to avoid including the standby time. |
+ timer_.Stop(); |
+} |
+ |
+void HighResolutionTimerManager::OnResume() { |
+ // Resume polling the usage. |
+ Time::ResetHighResolutionTimerUsage(); |
+ timer_.Reset(); |
+} |
+ |
void HighResolutionTimerManager::UseHiResClock(bool use) { |
if (use == hi_res_clock_available_) |
return; |
hi_res_clock_available_ = use; |
- base::Time::EnableHighResolutionTimer(use); |
+ Time::EnableHighResolutionTimer(use); |
} |
} // namespace base |