add interrupt latency printout command and mean/variance to interval performance counter

1 files changed, 8 insertions, 1 deletions

diff --git a/src/modules/systemlib/perf_counter.h b/src/modules/systemlib/perf_counter.h
index 668d9dfdf..d06606a5d 100644
--- a/src/modules/systemlib/perf_counter.h
+++ b/src/modules/systemlib/perf_counter.h
@@ -94,7 +94,7 @@ __EXPORT extern void		perf_begin(perf_counter_t handle);
  * End a performance event.
  *
  * This call applies to counters that operate over ranges of time; PC_ELAPSED etc.
- * If a call is made without a corresopnding perf_begin call, or if perf_cancel
+ * If a call is made without a corresponding perf_begin call, or if perf_cancel
  * has been called subsequently, no change is made to the counter.
  *
  * @param handle		The handle returned from perf_alloc.
@@ -143,6 +143,13 @@ __EXPORT extern void		perf_print_counter_fd(int fd, perf_counter_t handle);
 __EXPORT extern void		perf_print_all(int fd);
 
 /**
+ * Print hrt latency counters.
+ *
+ * @param fd			File descriptor to print to - e.g. 0 for stdout
+ */
+__EXPORT extern void		perf_print_latency(int fd);
+
+/**
  * Reset all of the performance counters.
  */
 __EXPORT extern void		perf_reset_all(void);