Merge "Scheduling group cleanup - add comment, SP_DEFAULT" (de930063) · Commits · e / os / android_system_core

include/cutils/sched_policy.h

+5 −0

Original line number	Diff line number	Diff line
		@@ -21,21 +21,26 @@
		extern "C" {
		#endif

		/* 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_CNT,
		SP_MAX = SP_CNT - 1,
		SP_SYSTEM_DEFAULT = SP_FOREGROUND,
		} SchedPolicy;

		/* 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);

+21 −0

Original line number	Diff line number	Diff line
		@@ -189,6 +189,11 @@ static int getSchedulerGroup(int tid, char* buf, size_t bufLen)

		int get_sched_policy(int tid, SchedPolicy *policy)
		{
		#ifdef HAVE_GETTID
		if (tid == 0) {
		tid = gettid();
		}
		#endif
		pthread_once(&the_once, __initialize);

		if (__sys_supports_schedgroups) {
		@@ -219,8 +224,23 @@ int get_sched_policy(int tid, SchedPolicy *policy)
		return 0;
		}

		/* Re-map SP_DEFAULT to the system default policy, and leave other values unchanged.
		* Call this any place a SchedPolicy is used as an input parameter.
		* Returns the possibly re-mapped policy.
		*/
		static inline SchedPolicy _policy(SchedPolicy p)
		{
		return p == SP_DEFAULT ? SP_SYSTEM_DEFAULT : p;
		}

		int set_sched_policy(int tid, SchedPolicy policy)
		{
		#ifdef HAVE_GETTID
		if (tid == 0) {
		tid = gettid();
		}
		#endif
		policy = _policy(policy);
		pthread_once(&the_once, __initialize);

		#if POLICY_DEBUG
		@@ -275,6 +295,7 @@ int set_sched_policy(int tid, SchedPolicy policy)

		const char *get_sched_policy_name(SchedPolicy policy)
		{
		policy = _policy(policy);
		static const char * const strings[SP_CNT] = {
		[SP_BACKGROUND] = "bg",
		[SP_FOREGROUND] = "fg",