Hi, On Fri, Jun 17, 2022 at 02:40:52PM +0800, Song Chen wrote: > static void usage(int error) > @@ -689,6 +697,7 @@ static void usage(int error) > " (default 500us).\n" > "-t NUM --threads The number of threads to run as deadline (default 1).\n" > "-q --quiet print a summary only on exit\n" > + "-b USEC --breaktrace=USEC send break trace command when latency > USEC\n" Please also consider to update the man pages. Daniel