diff options
Diffstat (limited to 'kernel/trace/trace_osnoise.c')
| -rw-r--r-- | kernel/trace/trace_osnoise.c | 22 |
1 files changed, 19 insertions, 3 deletions
diff --git a/kernel/trace/trace_osnoise.c b/kernel/trace/trace_osnoise.c index afb92e2f0aea..313439920a8c 100644 --- a/kernel/trace/trace_osnoise.c +++ b/kernel/trace/trace_osnoise.c @@ -1578,11 +1578,27 @@ static enum hrtimer_restart timerlat_irq(struct hrtimer *timer) trace_timerlat_sample(&s); - notify_new_max_latency(diff); + if (osnoise_data.stop_tracing) { + if (time_to_us(diff) >= osnoise_data.stop_tracing) { + + /* + * At this point, if stop_tracing is set and <= print_stack, + * print_stack is set and would be printed in the thread handler. + * + * Thus, print the stack trace as it is helpful to define the + * root cause of an IRQ latency. + */ + if (osnoise_data.stop_tracing <= osnoise_data.print_stack) { + timerlat_save_stack(0); + timerlat_dump_stack(time_to_us(diff)); + } - if (osnoise_data.stop_tracing) - if (time_to_us(diff) >= osnoise_data.stop_tracing) osnoise_stop_tracing(); + notify_new_max_latency(diff); + + return HRTIMER_NORESTART; + } + } wake_up_process(tlat->kthread); |