cc: Set ui/gpu/cc/ipc/upload/raster thread priorities.

content/common/child_process.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.
 
 #include "content/common/child_process.h"
 
 #if defined(OS_POSIX) && !defined(OS_ANDROID)
 #include <signal.h>  // For SigUSR1Handler below.
 #endif
 
 #include "base/message_loop.h"
 #include "base/metrics/statistics_recorder.h"
 #include "base/process_util.h"
 #include "base/string_number_conversions.h"
 #include "base/threading/thread.h"
 #include "base/utf_string_conversions.h"
 #include "content/common/child_thread.h"
 
 #if defined(OS_ANDROID)
 #include "base/debug/debugger.h"
+// TODO(epenner): Move thread priorities to base. (crbug.com/170549)
+#include <sys/resource.h>
 #endif
 
 #if defined(OS_POSIX) && !defined(OS_ANDROID)
 static void SigUSR1Handler(int signal) { }
 #endif
 
 namespace content {
 
 ChildProcess* ChildProcess::child_process_;
 
+#if defined(OS_ANDROID)
+// TODO(epenner): Move thread priorities to base. (crbug.com/170549)
+namespace {
+void SetHighThreadPriority() {
+  int nice_value = -6; // High priority.
+  setpriority(PRIO_PROCESS, base::PlatformThread::CurrentId(), nice_value);
+}
+}
+#endif
+
 ChildProcess::ChildProcess()
     : ref_count_(0),
       shutdown_event_(true, false),
       io_thread_("Chrome_ChildIOThread") {
   DCHECK(!child_process_);
   child_process_ = this;
 
   base::StatisticsRecorder::Initialize();
 
   // We can't recover from failing to start the IO thread.
   CHECK(io_thread_.StartWithOptions(
             base::Thread::Options(MessageLoop::TYPE_IO, 0)));
+
+#if defined(OS_ANDROID)
+  // TODO(epenner): Move thread priorities to base. (crbug.com/170549)
+  io_thread_.message_loop()->PostTask(FROM_HERE,
+                                      base::Bind(&SetHighThreadPriority));
+#endif
 }
 
 ChildProcess::~ChildProcess() {
   DCHECK(child_process_ == this);
 
   // Signal this event before destroying the child process.  That way all
   // background threads can cleanup.
   // For example, in the renderer the RenderThread instances will be able to
   // notice shutdown before the render process begins waiting for them to exit.
   shutdown_event_.Signal();
@@ skipping 68 matching lines @@
   memset(&sa, 0, sizeof(sa));
   sa.sa_handler = SigUSR1Handler;
   sigaction(SIGUSR1, &sa, NULL);
 
   pause();
 #endif  // defined(OS_ANDROID)
 #endif  // defined(OS_POSIX)
 }
 
 }  // namespace content