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Commit f9478fd6 authored by Kishore Sri venkata Ganesh Bolisetty's avatar Kishore Sri venkata Ganesh Bolisetty
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binder: update latency_sensitive flag for binder transactions 



To minimize wake up latency for binder transactions,
set low_latency flag.

Change-Id: If103199fc96e35d90b0eaaf32da38ae135976658
Signed-off-by: default avatarKishore Sri venkata Ganesh Bolisetty <bsrivenk@codeaurora.org>
parent 8410be1f

drivers/android/binder.c

+20 −0
Original line number Diff line number Diff line
@@ -979,6 +979,11 @@ static void binder_wakeup_poll_threads_ilocked(struct binder_proc *proc, 
		thread = rb_entry(n, struct binder_thread, rb_node);

		if (thread->looper & BINDER_LOOPER_STATE_POLL &&

		    binder_available_for_proc_work_ilocked(thread)) {

#ifdef CONFIG_SCHED_WALT

			if (sync && thread->task && thread->task->signal &&

				(thread->task->signal->oom_score_adj <= 0))

				thread->task->wts.low_latency = true;

#endif

			if (sync)

				wake_up_interruptible_sync(&thread->wait);

			else
@@ -1038,6 +1043,11 @@ static void binder_wakeup_thread_ilocked(struct binder_proc *proc, 
	assert_spin_locked(&proc->inner_lock);



	if (thread) {

#ifdef CONFIG_SCHED_WALT

		if (sync && thread->task && thread->task->signal &&

			(thread->task->signal->oom_score_adj <= 0))

			thread->task->wts.low_latency = true;

#endif

		if (sync)

			wake_up_interruptible_sync(&thread->wait);

		else
@@ -3598,6 +3608,12 @@ static void binder_transaction(struct binder_proc *proc, 
		binder_pop_transaction_ilocked(target_thread, in_reply_to);

		binder_enqueue_thread_work_ilocked(target_thread, &t->work);

		binder_inner_proc_unlock(target_proc);

#ifdef CONFIG_SCHED_WALT

		if (target_thread->task && target_thread->task->signal &&

			(target_thread->task->signal->oom_score_adj <= 0)) {

			target_thread->task->wts.low_latency = true;

		}

#endif

		wake_up_interruptible_sync(&target_thread->wait);

		binder_restore_priority(current, in_reply_to->saved_priority);

		binder_free_transaction(in_reply_to);
@@ -4690,6 +4706,10 @@ static int binder_thread_read(struct binder_proc *proc, 
		ptr += trsize;



		trace_binder_transaction_received(t);

#ifdef CONFIG_SCHED_WALT

		if (current->wts.low_latency)

			current->wts.low_latency = false;

#endif

		binder_stat_br(proc, thread, cmd);

		binder_debug(BINDER_DEBUG_TRANSACTION,

			     "%d:%d %s %d %d:%d, cmd %d size %zd-%zd ptr %016llx-%016llx\n",