sched: fix wrong truncation of walt_avg

The result of "__entry->walt_avg = (__entry->demand << 10)" will exceed
the range of "unsigned int", which will be truncated and make the trace
looks like as follows:

UnityMain-4588  [004]  6029.645672: walt_update_history:  4588(UnityMain): runtime 9928307 samples 1 event 4
			demand 9928307 walt 157 pelt 870 (hist: 9928307 9604307 8440077 87392 34144328) cpu 4
UnityMain-4588  [004]  6029.653658: walt_update_history:  4588(UnityMain): runtime 10000000 samples 1 event 4
			demand 10000000 walt 165 pelt 886 (hist: 10000000 9955691 6549308 64000 34144328) cpu 4

Fix this by using a u64 type instead of unsgined int type and make the
trace as below:

UnityMain-4617  [004]   117.613558: walt_update_history:  4617(UnityMain): runtime 5770597 samples 1 event 4
			demand 7038739 walt 720 pelt 680 (hist: 5770597 7680001 8904509 65596 156) cpu 4
UnityMain-4617  [004]   117.633560: walt_update_history:  4617(UnityMain): runtime 9911238 samples 1 event 4
			demand 9911238 walt 1014 pelt 769 (hist: 9911238 5770597 7680001 0 1664188058) cpu 4

Signed-off-by: Ke Wang <ke.wang@spreadtrum.com>

diff --git a/include/trace/events/sched.h b/include/trace/events/sched.h
index dffaffab4bc88696b8c8d0cbb98f518341648fd7..c18d8c89bd12f9ef174f15ae3fba028ad32c3596 100644 (file)
--- a/include/trace/events/sched.h
+++ b/include/trace/events/sched.h
@@ -1044,7 +1044,7 @@ TRACE_EVENT(walt_update_history,
                __field(         int,   samples                 )
                __field(         int,   evt                     )
                __field(         u64,   demand                  )
-               __field(unsigned int,   walt_avg                )
+               __field(         u64,   walt_avg                )
                __field(unsigned int,   pelt_avg                )
                __array(         u32,   hist, RAVG_HIST_SIZE_MAX)
                __field(         int,   cpu                     )
@@ -1066,7 +1066,7 @@ TRACE_EVENT(walt_update_history,
        ),
 
        TP_printk("%d (%s): runtime %u samples %d event %d demand %llu"
-               " walt %u pelt %u (hist: %u %u %u %u %u) cpu %d",
+               " walt %llu pelt %u (hist: %u %u %u %u %u) cpu %d",
                __entry->pid, __entry->comm,
                __entry->runtime, __entry->samples, __entry->evt,
                __entry->demand,