Reduce GPU watchdog polling frequency

content/gpu/gpu_watchdog_thread.cc

 // Copyright (c) 2012 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.
 
 #if defined(OS_WIN)
 #include <windows.h>
 #endif
 
 #include "content/gpu/gpu_watchdog_thread.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/command_line.h"
 #include "base/compiler_specific.h"
 #include "base/files/file_util.h"
 #include "base/power_monitor/power_monitor.h"
 #include "base/process/process.h"
 #include "build/build_config.h"
 #include "content/public/common/content_switches.h"
 #include "content/public/common/result_codes.h"
 
 namespace content {
 namespace {
-const int64 kCheckPeriodMs = 2000;
 #if defined(OS_CHROMEOS)
 const base::FilePath::CharType
     kTtyFilePath[] = FILE_PATH_LITERAL("/sys/class/tty/tty0/active");
 #endif
 #if defined(USE_X11)
 const unsigned char text[20] = "check";
 #endif
 }  // namespace
 
 GpuWatchdogThread::GpuWatchdogThread(int timeout)
@@ skipping 71 matching lines @@
 GpuWatchdogThread::GpuWatchdogTaskObserver::~GpuWatchdogTaskObserver() {
 }
 
 void GpuWatchdogThread::GpuWatchdogTaskObserver::WillProcessTask(
     const base::PendingTask& pending_task) {
   watchdog_->CheckArmed();
 }
 
 void GpuWatchdogThread::GpuWatchdogTaskObserver::DidProcessTask(
     const base::PendingTask& pending_task) {
-  watchdog_->CheckArmed();
 }
 
 GpuWatchdogThread::~GpuWatchdogThread() {
   // Verify that the thread was explicitly stopped. If the thread is stopped
   // implicitly by the destructor, CleanUp() will not be called.
   DCHECK(!weak_factory_.HasWeakPtrs());
 
 #if defined(OS_WIN)
   CloseHandle(watched_thread_handle_);
 #endif
@@ skipping 34 matching lines @@
 
   // If it took a long time for the acknowledgement, assume the computer was
   // recently suspended.
   bool was_suspended = (base::Time::Now() > suspension_timeout_);
 
   // The monitored thread has responded. Post a task to check it again.
   message_loop()->PostDelayedTask(
       FROM_HERE,
       base::Bind(&GpuWatchdogThread::OnCheck, weak_factory_.GetWeakPtr(),
           was_suspended),
-      base::TimeDelta::FromMilliseconds(kCheckPeriodMs));
+      0.5 * timeout_);
 }
 
 void GpuWatchdogThread::OnCheck(bool after_suspend) {
   CHECK(base::PlatformThread::CurrentId() == thread_id());
 
   // Do not create any new termination tasks if one has already been created
   // or the system is suspended.
   if (armed_ || suspended_)
     return;
 
@@ skipping 215 matching lines @@
   // not increasing. The other is where either the kernel hangs and never
   // returns to user level or where user level code
   // calls into kernel level repeatedly, giving up its quanta before it is
   // tracked, for example a loop that repeatedly Sleeps.
   return base::TimeDelta::FromMilliseconds(static_cast<int64>(
       (user_time64.QuadPart + kernel_time64.QuadPart) / 10000));
 }
 #endif
 
 }  // namespace content