| /* |
| * Copyright (C) 2007 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #ifndef __CUTILS_SCHED_POLICY_H |
| #define __CUTILS_SCHED_POLICY_H |
| |
| #include <stdbool.h> |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| /* |
| * Check if Linux kernel enables CPUSETS feature. |
| * |
| * Return value: 1 if Linux kernel CONFIG_CPUSETS=y; 0 otherwise. |
| */ |
| extern bool cpusets_enabled(); |
| |
| /* |
| * Check if Linux kernel enables SCHEDTUNE feature (only available in Android |
| * common kernel or Linaro LSK, not in mainline Linux as of v4.9) |
| * |
| * Return value: 1 if Linux kernel CONFIG_SCHEDTUNE=y; 0 otherwise. |
| */ |
| extern bool schedboost_enabled(); |
| |
| /* Keep in sync with THREAD_GROUP_* in frameworks/base/core/java/android/os/Process.java */ |
| typedef enum { |
| SP_DEFAULT = -1, |
| SP_BACKGROUND = 0, |
| SP_FOREGROUND = 1, |
| SP_SYSTEM = 2, // can't be used with set_sched_policy() |
| SP_AUDIO_APP = 3, |
| SP_AUDIO_SYS = 4, |
| SP_TOP_APP = 5, |
| SP_RT_APP = 6, |
| SP_CNT, |
| SP_MAX = SP_CNT - 1, |
| SP_SYSTEM_DEFAULT = SP_FOREGROUND, |
| } SchedPolicy; |
| |
| extern int set_cpuset_policy(int tid, SchedPolicy policy); |
| |
| /* Assign thread tid to the cgroup associated with the specified policy. |
| * If the thread is a thread group leader, that is it's gettid() == getpid(), |
| * then the other threads in the same thread group are _not_ affected. |
| * On platforms which support gettid(), zero tid means current thread. |
| * Return value: 0 for success, or -errno for error. |
| */ |
| extern int set_sched_policy(int tid, SchedPolicy policy); |
| |
| /* Return the policy associated with the cgroup of thread tid via policy pointer. |
| * On platforms which support gettid(), zero tid means current thread. |
| * Return value: 0 for success, or -1 for error and set errno. |
| */ |
| extern int get_sched_policy(int tid, SchedPolicy *policy); |
| |
| /* Return a displayable string corresponding to policy. |
| * Return value: non-NULL NUL-terminated name of unspecified length; |
| * the caller is responsible for displaying the useful part of the string. |
| */ |
| extern const char *get_sched_policy_name(SchedPolicy policy); |
| |
| #ifdef __cplusplus |
| } |
| #endif |
| |
| #endif /* __CUTILS_SCHED_POLICY_H */ |