linux-gen: timer: add possibility to profile inline timer performance

Add the branch to profile inline timer scan performance. Enable inline
timer scan performance test by setting CONFIG_TIMER_PROFILE_INLINE in
odp_config_internal.h.

Signed-off-by: Joyce Kong <joyce.kong@arm.com>
Reviewed-by: Petri Savolainen <petri.savolainen@nokia.com>

platform/linux-generic/include/odp_config_internal.h

@@ -190,6 +190,9 @@ extern "C" {
  */
 #define CONFIG_TIMER_128BIT_ATOMICS 1
 
+/* Enable timer scan performance benchmark. This works with inline enabled. */
+#define CONFIG_TIMER_PROFILE_INLINE 0
+
 #ifdef __cplusplus
 }
 #endif

platform/linux-generic/odp_system_info.c

@@ -611,5 +611,6 @@ void odp_sys_config_print(void)
 	_ODP_PRINT("CONFIG_POOL_MAX_NUM:         %i\n", CONFIG_POOL_MAX_NUM);
 	_ODP_PRINT("CONFIG_POOL_CACHE_MAX_SIZE:  %i\n", CONFIG_POOL_CACHE_MAX_SIZE);
 	_ODP_PRINT("CONFIG_TIMER_128BIT_ATOMICS: %i\n", CONFIG_TIMER_128BIT_ATOMICS);
+	_ODP_PRINT("CONFIG_TIMER_PROFILE_INLINE: %i\n", CONFIG_TIMER_PROFILE_INLINE);
 	_ODP_PRINT("\n");
 }

platform/linux-generic/odp_timer.c

@@ -235,7 +235,8 @@ typedef struct timer_local_t {
 	odp_time_t last_run;
 	int        run_cnt;
 	uint8_t    poll_shared;
-
+	uint64_t   prof_nsec;
+	uint64_t   prof_rounds;
 } timer_local_t;
 
 /* Points to timer global data */
@@ -872,7 +873,17 @@ void _odp_timer_run_inline(int dec)
 	}
 
 	/* Check the timer pools. */
-	timer_pool_scan_inline(num, now);
+	if (CONFIG_TIMER_PROFILE_INLINE) {
+		odp_time_t t1 = odp_time_local_strict();
+
+		timer_pool_scan_inline(num, now);
+		odp_time_t t2 = odp_time_local_strict();
+
+		timer_local.prof_nsec += odp_time_diff_ns(t2, t1);
+		timer_local.prof_rounds++;
+	} else {
+		timer_pool_scan_inline(num, now);
+	}
 }
 
 /******************************************************************************
@@ -2119,6 +2130,8 @@ int _odp_timer_init_local(void)
 	timer_local.last_run = odp_time_global_from_ns(0);
 	timer_local.run_cnt = 1;
 	timer_local.poll_shared = 0;
+	timer_local.prof_nsec = 0;
+	timer_local.prof_rounds = 0;
 
 	/* Timer feature disabled */
 	if (timer_global == NULL)
@@ -2140,5 +2153,16 @@ int _odp_timer_init_local(void)
 
 int _odp_timer_term_local(void)
 {
+	if (CONFIG_TIMER_PROFILE_INLINE) {
+		if (timer_local.prof_rounds) {
+			_ODP_PRINT("\n"
+				   "Inline timer profiling for thread %i:\n"
+				   "scan rounds:   %" PRIu64 "\n"
+				   "ave scan nsec: %.1f\n",
+				   odp_thread_id(), timer_local.prof_rounds,
+				   (double)timer_local.prof_nsec / timer_local.prof_rounds);
+		}
+	}
+
 	return 0;
 }