Merge "Keep the sched policy for a thread of low priority" (ccad0bb9) · Commits · e / os / android_frameworks_base

core/jni/android_util_Process.cpp

+40 −18

Original line number	Diff line number	Diff line
		@@ -247,10 +247,8 @@ void android_os_Process_setProcessGroup(JNIEnv* env, jobject clazz, int pid, jin
		return;
		}

		bool isDefault = false;
		if (grp < 0) {
		grp = SP_FOREGROUND;
		isDefault = true;
		}

		if (kDebugPolicy) {
		@@ -285,7 +283,7 @@ void android_os_Process_setProcessGroup(JNIEnv* env, jobject clazz, int pid, jin
		while ((de = readdir(d))) {
		int t_pid;
		int t_pri;
		int err;
		std::string taskprofile;

		if (de->d_name[0] == '.')
		continue;
		@@ -307,25 +305,49 @@ void android_os_Process_setProcessGroup(JNIEnv* env, jobject clazz, int pid, jin
		}
		}

		if (isDefault) {
		if (t_pri >= ANDROID_PRIORITY_BACKGROUND) {
		// This task wants to stay at background
		// update its cpuset so it doesn't only run on bg core(s)
		err = SetTaskProfiles(t_pid, {get_cpuset_policy_profile_name((SchedPolicy)grp)}, true) ? 0 : -1;
		if (err != NO_ERROR) {
		signalExceptionForGroupError(env, -err, t_pid);
		errno = 0;
		// grp == SP_BACKGROUND. Set background cpuset policy profile for all threads.
		if (grp == SP_BACKGROUND) {
		if (!SetTaskProfiles(t_pid, {"CPUSET_SP_BACKGROUND"}, true)) {
		signalExceptionForGroupError(env, errno ? errno : EPERM, t_pid);
		break;
		}
		continue;
		}
		}

		err = SetTaskProfiles(t_pid, {get_cpuset_policy_profile_name((SchedPolicy)grp)}, true) ? 0 : -1;
		if (err != NO_ERROR) {
		signalExceptionForGroupError(env, -err, t_pid);
		// grp != SP_BACKGROUND. Only change the cpuset cgroup for low priority thread, so it could
		// preserve it sched policy profile setting.
		if (t_pri >= ANDROID_PRIORITY_BACKGROUND) {
		switch (grp) {
		case SP_SYSTEM:
		taskprofile = "ServiceCapacityLow";
		break;
		case SP_RESTRICTED:
		taskprofile = "ServiceCapacityRestricted";
		break;
		case SP_FOREGROUND:
		case SP_AUDIO_APP:
		case SP_AUDIO_SYS:
		taskprofile = "ProcessCapacityHigh";
		break;
		case SP_TOP_APP:
		taskprofile = "ProcessCapacityMax";
		break;
		default:
		taskprofile = "ProcessCapacityNormal";
		break;
		}

		if (!SetTaskProfiles(t_pid, {taskprofile}, true)) {
		signalExceptionForGroupError(env, errno ? errno : EPERM, t_pid);
		break;
		}
		// Change the cpuset policy profile for non-low priority thread according to the grp
		} else {
		if (!SetTaskProfiles(t_pid, {get_cpuset_policy_profile_name((SchedPolicy)grp)}, true)) {
		signalExceptionForGroupError(env, errno ? errno : EPERM, t_pid);
		break;
		}
		}
		}
		closedir(d);
		}