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authorPaul Selkirk <paul@psgd.org>2017-05-03 16:38:09 -0400
committerPaul Selkirk <paul@psgd.org>2017-09-07 18:10:32 -0400
commit12585a41bbf124ff8204fc1b538b9796812db747 (patch)
tree970b416b03fedeedddd0212bb9d0981a1c166d74 /task.c
parentceee42024b728a878063548ea245c47a951be29f (diff)
Add some task metrics.
Diffstat (limited to 'task.c')
-rw-r--r--task.c48
1 files changed, 48 insertions, 0 deletions
diff --git a/task.c b/task.c
index 2e2ddec..e156940 100644
--- a/task.c
+++ b/task.c
@@ -81,6 +81,14 @@ static tcb_t *cur_task = NULL;
#define STACK_GUARD_WORD 0x55AA5A5A
+#ifdef TASK_METRICS
+static uint32_t tick_start = 0;
+static uint32_t tick_prev = 0;
+static uint32_t tick_idle = 0;
+static uint32_t tick_max = 0;
+static uint32_t nyield = 0;
+#endif
+
/* Add a task.
*/
tcb_t *task_add(char *name, funcp_t func, void *cookie, void *stack, size_t stack_len)
@@ -180,6 +188,10 @@ void task_yield(void)
if (tail == NULL)
return;
+#ifdef TASK_METRICS
+ uint32_t tick0 = HAL_GetTick();
+#endif
+
/* Find the next runnable task. Loop if every task is waiting. */
while (1) {
next = next_task();
@@ -197,6 +209,20 @@ void task_yield(void)
* } while (next == NULL);
*/
+#ifdef TASK_METRICS
+ uint32_t tick = HAL_GetTick();
+ tick_idle += (tick - tick0);
+ if (tick_start == 0)
+ tick_start = tick;
+ if (tick_prev != 0) {
+ uint32_t duration = tick0 - tick_prev;
+ if (duration > tick_max)
+ tick_max = duration;
+ }
+ tick_prev = tick;
+ ++nyield;
+#endif
+
/* If there are no other runnable tasks (and cur_task is runnable),
* we don't need to context-switch.
*/
@@ -354,3 +380,25 @@ void task_mutex_unlock(task_mutex_t *mutex)
if (mutex != NULL)
mutex->locked = 0;
}
+
+#ifdef TASK_METRICS
+void task_get_metrics(struct task_metrics *tm)
+{
+ if (tm != NULL) {
+ tm->avg.tv_sec = 0;
+ tm->avg.tv_usec = (HAL_GetTick() - tick_start - tick_idle) * 1000 / nyield;
+ if (tm->avg.tv_usec > 1000000) {
+ tm->avg.tv_sec = tm->avg.tv_usec / 1000000;
+ tm->avg.tv_usec = tm->avg.tv_usec % 1000000;
+ }
+ tm->max.tv_sec = tick_max / 1000;
+ tm->max.tv_usec = (tick_max % 1000) * 1000;
+ }
+}
+
+void task_reset_metrics(void)
+{
+ tick_start = HAL_GetTick();
+ tick_prev = tick_idle = tick_max = nyield = 0;
+}
+#endif