Export job release time and job sequence number in ctrl page

2 files changed, 13 insertions, 4 deletions

diff --git a/include/litmus/rt_param.h b/include/litmus/rt_param.h
index ebbc93632c94..db133ac0e237 100644
--- a/include/litmus/rt_param.h
+++ b/include/litmus/rt_param.h
@@ -121,8 +121,11 @@ struct control_page {
         uint64_t irq_syscall_start; /* Snapshot of irq_count when the syscall
                                      * started. */
 
-        /* to be extended */
         lt_t deadline; /* Deadline for the currently executing job */
+        lt_t release;  /* Release time of current job */
+        uint64_t job_index; /* Job sequence number of current job */
+
+        /* to be extended */
 };
 
 /* Expected offsets within the control page. */
@@ -132,6 +135,8 @@ struct control_page {
 #define LITMUS_CP_OFFSET_TS_SC_START    16
 #define LITMUS_CP_OFFSET_IRQ_SC_START   24
 #define LITMUS_CP_OFFSET_DEADLINE       32
+#define LITMUS_CP_OFFSET_RELEASE        40
+#define LITMUS_CP_OFFSET_JOB_INDEX      48
 
 /* don't export internal data structures to user space (liblitmus) */
 #ifdef __KERNEL__
diff --git a/litmus/jobs.c b/litmus/jobs.c
index 3f1cb0e2327e..3a6a14f9121c 100644
--- a/litmus/jobs.c
+++ b/litmus/jobs.c
@@ -18,9 +18,13 @@ static inline void setup_release(struct task_struct *t, lt_t release)
         /* update job sequence number */
         t->rt_param.job_params.job_no++;
 
-        /* add the deadline to */
-        if(has_control_page(t))
-                get_control_page(t)->deadline = t->rt_param.job_params.deadline;
+        /* expose to user space */
+        if (has_control_page(t)) {
+                struct control_page* cp = get_control_page(t);
+                cp->deadline = t->rt_param.job_params.deadline;
+                cp->release = get_release(t);
+                cp->job_index = t->rt_param.job_params.job_no;
+        }
 }
 
 void prepare_for_next_period(struct task_struct *t)