perf_counter: Add scale information to the mmap control page

Add the needed time scale to the self-profile mmap information.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

2 files changed, 9 insertions, 1 deletions

diff --git a/include/linux/perf_counter.h b/include/linux/perf_counter.h
index 489d5cbfbcca..bcbf1c43ed42 100644
--- a/include/linux/perf_counter.h
+++ b/include/linux/perf_counter.h
@@ -232,12 +232,14 @@ struct perf_counter_mmap_page {
         __u32   lock;                   /* seqlock for synchronization */
         __u32   index;                  /* hardware counter identifier */
         __s64   offset;                 /* add to hardware counter value */
+        __u64   time_enabled;           /* time counter active */
+        __u64   time_running;           /* time counter on cpu */
 
                 /*
                  * Hole for extension of the self monitor capabilities
                  */
 
-        __u64   __reserved[125];        /* align to 1k */
+        __u64   __reserved[123];        /* align to 1k */
 
         /*
          * Control data for the mmap() data buffer.
diff --git a/kernel/perf_counter.c b/kernel/perf_counter.c
index c2b19c111718..23614adab475 100644
--- a/kernel/perf_counter.c
+++ b/kernel/perf_counter.c
@@ -1782,6 +1782,12 @@ void perf_counter_update_userpage(struct perf_counter *counter)
         if (counter->state == PERF_COUNTER_STATE_ACTIVE)
                 userpg->offset -= atomic64_read(&counter->hw.prev_count);
 
+        userpg->time_enabled = counter->total_time_enabled +
+                        atomic64_read(&counter->child_total_time_enabled);
+
+        userpg->time_running = counter->total_time_running +
+                        atomic64_read(&counter->child_total_time_running);
+
         barrier();
         ++userpg->lock;
         preempt_enable();