lib: Incorporate Wall and Cpu warning into `show thread cpu`

Incorporate into the `show thread cpu` the number of times
we have issued warnings about a particular thread being
too slow.

Signed-off-by: Donald Sharp <sharpd@nvidia.com>

3 files changed, 21 insertions, 8 deletions

diff --git a/lib/thread.c b/lib/thread.c
index 7a3d50419..567516300 100644
--- a/lib/thread.c
+++ b/lib/thread.c
@@ -124,11 +124,12 @@ static void cpu_record_hash_free(void *a)
 static void vty_out_cpu_thread_history(struct vty *vty,
 				       struct cpu_thread_history *a)
 {
-	vty_out(vty, "%5zu %10zu.%03zu %9zu %8zu %9zu %8zu %9zu",
+	vty_out(vty, "%5zu %10zu.%03zu %9zu %8zu %9zu %8zu %9zu %9zu %9zu",
 		a->total_active, a->cpu.total / 1000, a->cpu.total % 1000,
-		a->total_calls,	(a->cpu.total / a->total_calls), a->cpu.max,
-		(a->real.total / a->total_calls), a->real.max);
-	vty_out(vty, " %c%c%c%c%c  %s\n",
+		a->total_calls, (a->cpu.total / a->total_calls), a->cpu.max,
+		(a->real.total / a->total_calls), a->real.max,
+		a->total_cpu_warn, a->total_wall_warn);
+	vty_out(vty, "  %c%c%c%c%c  %s\n",
 		a->types & (1 << THREAD_READ) ? 'R' : ' ',
 		a->types & (1 << THREAD_WRITE) ? 'W' : ' ',
 		a->types & (1 << THREAD_TIMER) ? 'T' : ' ',
@@ -149,6 +150,10 @@ static void cpu_record_hash_print(struct hash_bucket *bucket, void *args[])
 		atomic_load_explicit(&a->total_active, memory_order_seq_cst);
 	copy.total_calls =
 		atomic_load_explicit(&a->total_calls, memory_order_seq_cst);
+	copy.total_cpu_warn =
+		atomic_load_explicit(&a->total_cpu_warn, memory_order_seq_cst);
+	copy.total_wall_warn =
+		atomic_load_explicit(&a->total_wall_warn, memory_order_seq_cst);
 	copy.cpu.total =
 		atomic_load_explicit(&a->cpu.total, memory_order_seq_cst);
 	copy.cpu.max = atomic_load_explicit(&a->cpu.max, memory_order_seq_cst);
@@ -165,6 +170,8 @@ static void cpu_record_hash_print(struct hash_bucket *bucket, void *args[])
 	vty_out_cpu_thread_history(vty, &copy);
 	totals->total_active += copy.total_active;
 	totals->total_calls += copy.total_calls;
+	totals->total_cpu_warn += copy.total_cpu_warn;
+	totals->total_wall_warn += copy.total_wall_warn;
 	totals->real.total += copy.real.total;
 	if (totals->real.max < copy.real.max)
 		totals->real.max = copy.real.max;
@@ -202,7 +209,7 @@ static void cpu_record_print(struct vty *vty, uint8_t filter)
 			vty_out(vty,
 				"Active   Runtime(ms)   Invoked Avg uSec Max uSecs");
 			vty_out(vty, " Avg uSec Max uSecs");
-			vty_out(vty, "  Type  Thread\n");
+			vty_out(vty, "  CPU_Warn Wall_Warn  Type   Thread\n");
 
 			if (m->cpu_record->count)
 				hash_iterate(
@@ -223,7 +230,7 @@ static void cpu_record_print(struct vty *vty, uint8_t filter)
 	vty_out(vty, "%30s %18s %18s\n", "",
 		"CPU (user+system):", "Real (wall-clock):");
 	vty_out(vty, "Active   Runtime(ms)   Invoked Avg uSec Max uSecs");
-	vty_out(vty, " Avg uSec Max uSecs");
+	vty_out(vty, " Avg uSec Max uSecs  CPU_Warn Wall_Warn");
 	vty_out(vty, "  Type  Thread\n");
 
 	if (tmp.total_calls > 0)
@@ -1858,6 +1865,8 @@ void thread_call(struct thread *thread)
 		 * Whinge about it now, so we're aware this is yet another task
 		 * to fix.
 		 */
+		atomic_fetch_add_explicit(&thread->hist->total_cpu_warn,
+					  1, memory_order_seq_cst);
 		flog_warn(
 			EC_LIB_SLOW_THREAD_CPU,
 			"CPU HOG: task %s (%lx) ran for %lums (cpu time %lums)",
@@ -1870,6 +1879,8 @@ void thread_call(struct thread *thread)
 		 * about this because this could imply some sort of
 		 * scheduling issue.
 		 */
+		atomic_fetch_add_explicit(&thread->hist->total_wall_warn,
+					  1, memory_order_seq_cst);
 		flog_warn(
 			EC_LIB_SLOW_THREAD_WALL,
 			"STARVATION: task %s (%lx) ran for %lums (cpu time %lums)",
diff --git a/lib/thread.h b/lib/thread.h
index af6833113..fee728dbf 100644
--- a/lib/thread.h
+++ b/lib/thread.h
@@ -119,6 +119,8 @@ struct thread {
 
 struct cpu_thread_history {
 	int (*func)(struct thread *);
+	atomic_size_t total_cpu_warn;
+	atomic_size_t total_wall_warn;
 	atomic_size_t total_calls;
 	atomic_size_t total_active;
 	struct time_stats {
diff --git a/lib/vty.c b/lib/vty.c
index 05e495c45..bc4b34063 100644
--- a/lib/vty.c
+++ b/lib/vty.c
@@ -517,12 +517,12 @@ static int vty_command(struct vty *vty, char *buf)
 			/* Warn about CPU hog that must be fixed. */
 			flog_warn(
 				EC_LIB_SLOW_THREAD_CPU,
-				"SLOW COMMAND: command took %lums (cpu time %lums): %s",
+				"CPU HOG: command took %lums (cpu time %lums): %s",
 				realtime / 1000, cputime / 1000, buf);
 		} else if (realtime > CONSUMED_TIME_CHECK) {
 			flog_warn(
 				EC_LIB_SLOW_THREAD_WALL,
-				"SLOW COMMAND: command took %lums (cpu time %lums): %s",
+				"STARVATION: command took %lums (cpu time %lums): %s",
 				realtime / 1000, cputime / 1000, buf);
 		}
 	}