Merge "Use SetProcessProfilesCached in android_os_Process_setProcessGroup" (5591435b) · Commits · e / os / android_frameworks_base

core/jni/android_util_Process.cpp

+2 −80

Original line number	Diff line number	Diff line
		@@ -235,9 +235,7 @@ void android_os_Process_setThreadGroupAndCpuset(JNIEnv* env, jobject clazz, int
		void android_os_Process_setProcessGroup(JNIEnv* env, jobject clazz, int pid, jint grp)
		{
		ALOGV("%s pid=%d grp=%" PRId32, __func__, pid, grp);
		DIR *d;
		char proc_path[255];
		struct dirent *de;

		if (!verifyGroup(env, grp)) {
		return;
		@@ -277,84 +275,8 @@ void android_os_Process_setProcessGroup(JNIEnv* env, jobject clazz, int pid, jin
		}
		}

		sprintf(proc_path, "/proc/%d/task", pid);
		if (!(d = opendir(proc_path))) {
		// If the process exited on us, don't generate an exception
		if (errno != ENOENT)
		signalExceptionForGroupError(env, errno, pid);
		return;
		}

		while ((de = readdir(d))) {
		int t_pid;
		int t_pri;
		std::string taskprofile;

		if (de->d_name[0] == '.')
		continue;
		t_pid = atoi(de->d_name);

		if (!t_pid) {
		ALOGE("Error getting pid for '%s'\n", de->d_name);
		continue;
		}

		t_pri = getpriority(PRIO_PROCESS, t_pid);

		if (t_pri <= ANDROID_PRIORITY_AUDIO) {
		int scheduler = sched_getscheduler(t_pid) & ~SCHED_RESET_ON_FORK;
		if ((scheduler == SCHED_FIFO) \|\| (scheduler == SCHED_RR)) {
		// This task wants to stay in its current audio group so it can keep its budget
		// don't update its cpuset or cgroup
		continue;
		}
		}

		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;
		}

		// 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);
		if (!SetProcessProfilesCached(0, pid, {get_cpuset_policy_profile_name((SchedPolicy)grp)}))
		signalExceptionForGroupError(env, errno ? errno : EPERM, pid);
		}

		void android_os_Process_setProcessFrozen(