Introduce a new command line option --debug which enables the ftrace
log entries only if enabled. Currently, cyclicdeadline will log every
start of a cycle to kernel buffer, e.g. "cyclicdeadline -i 5000" gives
start at 30269625044 off=4 (period=30269625040 next=30269630040)
T: 0 (27109) I:5000 C: 230 Min: 2 Act: 2 Avg: 1 Max: 4
start at 30269635041 off=1 (period=30269635040 next=30269640040)
T: 0 (27109) I:5000 C: 232 Min: 1 Act: 1 Avg: 1 Max: 4
in case the kernel log levels are set higher which is usually the case
of CI systems.
Signed-off-by: Daniel Wagner <dwagner@xxxxxxx>
---
src/sched_deadline/cyclicdeadline.c | 13 ++++++++++---
1 file changed, 10 insertions(+), 3 deletions(-)
diff --git a/src/sched_deadline/cyclicdeadline.c b/src/sched_deadline/cyclicdeadline.c
index 4c81891bbe63..dea9800b6507 100644
--- a/src/sched_deadline/cyclicdeadline.c
+++ b/src/sched_deadline/cyclicdeadline.c
@@ -87,8 +87,9 @@ static int cpu_count;
static int all_cpus;
static int nr_threads;
static int use_nsecs;
-static int mark_fd;
+static int mark_fd = -1;
static int quiet;
+static int debug_enabled;
static char jsonfile[MAX_PATH];
static int find_mount(const char *mount, char *debugfs)
@@ -602,6 +603,7 @@ static void usage(int error)
"-D TIME --duration Specify a length for the test run.\n"
" Append 'm', 'h', or 'd' to specify minutes, hours or\n"
" days\n"
+ " --debug Enable ftrace logging\n"
"-h --help Show this help menu.\n"
"-i INTV --interval The shortest deadline for the tasks in us\n"
" (default 1000us).\n"
@@ -985,7 +987,7 @@ static void write_stats(FILE *f, void *data)
}
enum options_valud {
- OPT_AFFINITY=1, OPT_DURATION, OPT_HELP, OPT_INTERVAL,
+ OPT_AFFINITY=1, OPT_DURATION, OPT_DEBUG, OPT_HELP, OPT_INTERVAL,
OPT_JSON, OPT_STEP, OPT_THREADS, OPT_QUIET
};
@@ -1019,6 +1021,7 @@ int main(int argc, char **argv)
static struct option options[] = {
{ "affinity", optional_argument, NULL, OPT_AFFINITY },
{ "duration", required_argument, NULL, OPT_DURATION },
+ { "debug", no_argument, NULL, OPT_DEBUG },
{ "help", no_argument, NULL, OPT_HELP },
{ "interval", required_argument, NULL, OPT_INTERVAL },
{ "json", required_argument, NULL, OPT_JSON },
@@ -1062,6 +1065,9 @@ int main(int argc, char **argv)
case 'D':
duration = parse_time_string(optarg);
break;
+ case OPT_DEBUG:
+ debug_enabled = 1;
+ break;
case OPT_QUIET:
case 'q':
quiet = 1;
@@ -1106,7 +1112,8 @@ int main(int argc, char **argv)
if (mlockall(MCL_CURRENT|MCL_FUTURE) == -1)
warn("mlockall");
- setup_ftrace_marker();
+ if (debug_enabled)
+ setup_ftrace_marker();
thread = calloc(nr_threads, sizeof(*thread));
sched_data = calloc(nr_threads, sizeof(*sched_data));
--
2.31.1
