sched_trace: add sched_trace_weight_error()

Export the accuracy of the error prediction to user space.

1 files changed, 22 insertions, 10 deletions

diff --git a/include/linux/sched_trace.h b/include/linux/sched_trace.h
index 76e149b36c..88d19e2903 100644
--- a/include/linux/sched_trace.h
+++ b/include/linux/sched_trace.h
@@ -6,16 +6,17 @@
 #include <linux/sched.h>
 
 typedef enum {
-        ST_INVOCATION           = 0,
-        ST_ARRIVAL              = 1,
-        ST_DEPARTURE            = 2,
-        ST_PREEMPTION           = 3,
-        ST_SCHEDULED            = 4,
-        ST_JOB_RELEASE          = 5,
-        ST_JOB_COMPLETION       = 6,
-        ST_CAPACITY_RELEASE     = 7,
-        ST_CAPACITY_ALLOCATION  = 8,
-        ST_SERVICE_LEVEL_CHANGE = 9
+        ST_INVOCATION           =  0,
+        ST_ARRIVAL              =  1,
+        ST_DEPARTURE            =  2,
+        ST_PREEMPTION           =  3,
+        ST_SCHEDULED            =  4,
+        ST_JOB_RELEASE          =  5,
+        ST_JOB_COMPLETION       =  6,
+        ST_CAPACITY_RELEASE     =  7,
+        ST_CAPACITY_ALLOCATION  =  8,
+        ST_SERVICE_LEVEL_CHANGE =  9,
+        ST_WEIGHT_ERROR         = 10,
 } trace_type_t;
 
 typedef struct {
@@ -95,6 +96,13 @@ typedef struct {
         service_level_t         new_level;
 } service_level_change_record_t;
 
+typedef struct {
+        trace_header_t          header;
+        pid_t                   task;
+        fp_t                    estimate;
+        fp_t                    actual;
+} weight_error_record_t;
+
 #ifdef CONFIG_SCHED_TASK_TRACE
 void sched_trace_scheduler_invocation(void);
 
@@ -128,6 +136,7 @@ void sched_trace_server_scheduled(int id, task_class_t class,
 
 void sched_trace_service_level_change(struct task_struct* t);
                                       
+void sched_trace_weight_error(struct task_struct* t, fp_t actual);
 
 #else
 #define sched_trace_scheduler_invocation(x)
@@ -148,6 +157,9 @@ void sched_trace_service_level_change(struct task_struct* t);
 
 #define sched_trace_service_level_change(t)
 
+#define sched_trace_weight_error(x, y)
+
+
 #endif