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

base/threading/platform_thread_posix.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 "base/threading/platform_thread.h"
 
 #include <errno.h>
 #include <sched.h>
 
 #include "base/lazy_instance.h"
@@ skipping 11 matching lines @@
 
 #if defined(OS_LINUX)
 #include <sys/prctl.h>
 #include <sys/resource.h>
 #include <sys/syscall.h>
 #include <sys/time.h>
 #include <unistd.h>
 #endif
 
 #if defined(OS_ANDROID)
+#include <sys/resource.h>
 #include "base/android/jni_android.h"
 #endif
 
 // TODO(bbudge) Use time.h when NaCl toolchain supports _POSIX_TIMERS
 #if defined(OS_NACL)
 #include <sys/nacl_syscalls.h>
 #endif
 
 namespace base {
 
 #if defined(OS_MACOSX)
 void InitThreading();
 #endif
 
 namespace {
 
 #if !defined(OS_MACOSX)
 // Mac name code is in in platform_thread_mac.mm.
 LazyInstance<ThreadLocalPointer<char> >::Leaky
     current_thread_name = LAZY_INSTANCE_INITIALIZER;
 #endif
 
 struct ThreadParams {
   PlatformThread::Delegate* delegate;
   bool joinable;
 };
 
 void* ThreadFunc(void* params) {
+#if defined(OS_ANDROID)
+  // Threads on linux/android may inherit their priority from the thread
+  // where they were created. This sets all threads to the default.
+  // TODO(epenner): Move thread priorities to base. (crbug.com/170549)
+  if (setpriority(PRIO_PROCESS, PlatformThread::CurrentId(), 0))
+    DVLOG(1) << "Failed to reset initial thread nice value to zero.";
+#endif
   ThreadParams* thread_params = static_cast<ThreadParams*>(params);
   PlatformThread::Delegate* delegate = thread_params->delegate;
   if (!thread_params->joinable)
     base::ThreadRestrictions::SetSingletonAllowed(false);
   delete thread_params;
   delegate->ThreadMain();
 #if defined(OS_ANDROID)
   base::android::DetachFromVM();
 #endif
   return NULL;
@@ skipping 207 matching lines @@
 #if !defined(OS_MACOSX)
 // Mac OS X uses lower-level mach APIs.
 
 // static
 void PlatformThread::SetThreadPriority(PlatformThreadHandle, ThreadPriority) {
   // TODO(crogers): Implement, see http://crbug.com/116172
 }
 #endif
 
 }  // namespace base