Make the iteration loop zero-based, otherwise we write past the samples
array boundary and waste the first cell.
Signed-off-by: Sebastien Dugue <[EMAIL PROTECTED]>
Acked-by: Darren Hart <[EMAIL PROTECTED]>
Cc: Tim Chavez <[EMAIL PROTECTED]>
---
.../realtime/func/sched_latency/sched_latency.c | 10 +++++-----
1 files changed, 5 insertions(+), 5 deletions(-)
diff --git a/testcases/realtime/func/sched_latency/sched_latency.c
b/testcases/realtime/func/sched_latency/sched_latency.c
index 9c6514f..a121545 100644
--- a/testcases/realtime/func/sched_latency/sched_latency.c
+++ b/testcases/realtime/func/sched_latency/sched_latency.c
@@ -136,7 +136,7 @@ void *periodic_thread(void *arg)
latency_trace_enable();
latency_trace_start();
}
- for (i = 1; i <= iterations; i++) {
+ for (i = 0; i < iterations; i++) {
/* wait for the period to start */
next += period;
prev = now;
@@ -166,7 +166,7 @@ void *periodic_thread(void *arg)
/* start of period */
now = rt_gettime();
- delay = (now - start - (nsec_t)i*period)/NS_PER_US;
+ delay = (now - start - (nsec_t)(i+1)*period)/NS_PER_US;
dat.records[i].x = i;
dat.records[i].y = delay;
if (delay < min_delay)
@@ -189,11 +189,11 @@ void *periodic_thread(void *arg)
}
if (latency_threshold) {
latency_trace_stop();
- if (i != (iterations + 1)) {
+ if (i != iterations) {
printf("Latency threshold (%lluus) exceeded at
iteration %d\n",
latency_threshold, i);
latency_trace_print();
- stats_container_resize(&dat, i);
+ stats_container_resize(&dat, i+1);
}
}
@@ -204,7 +204,7 @@ void *periodic_thread(void *arg)
stats_container_save("hist", "Periodic Scheduling Latency Histogram",\
"Iteration", "Latency (us)", &hist, "steps");
- avg_delay /= (i - 1);
+ avg_delay /= (i + 1);
printf("\n\n");
printf("Start: %4llu us: %s\n", start_delay,
start_delay < PASS_US ? "PASS" : "FAIL");
--
1.5.4.rc2.84.gf85fd-dirty
-------------------------------------------------------------------------
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