Add the -e <sys:[event]> option. This option allows the timerlat top to
enable additional events to the trace instance. Multiple -e are enabled,
and it implies the -t option (if not already set).
Cc: Daniel Bristot de Oliveira <bristot@xxxxxxxxxx>
Cc: Steven Rostedt <rostedt@xxxxxxxxxxx>
Cc: Jonathan Corbet <corbet@xxxxxxx>
Cc: linux-trace-devel@xxxxxxxxxxxxxxx
Cc: linux-doc@xxxxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx
Signed-off-by: Daniel Bristot de Oliveira <bristot@xxxxxxxxxx>
---
tools/tracing/rtla/src/timerlat_top.c | 32 +++++++++++++++++++++++++--
1 file changed, 30 insertions(+), 2 deletions(-)
diff --git a/tools/tracing/rtla/src/timerlat_top.c b/tools/tracing/rtla/src/timerlat_top.c
index aef044832964..795dc0c673ad 100644
--- a/tools/tracing/rtla/src/timerlat_top.c
+++ b/tools/tracing/rtla/src/timerlat_top.c
@@ -30,6 +30,7 @@ struct timerlat_top_params {
int quiet;
int set_sched;
struct sched_attr sched_param;
+ struct trace_events *events;
};
struct timerlat_top_cpu {
@@ -267,7 +268,7 @@ static void timerlat_top_usage(char *usage)
static const char *const msg[] = {
"",
" usage: rtla timerlat [top] [-h] [-q] [-a us] [-d s] [-D] [-n] [-p us] [-i us] [-T us] [-s us] \\",
- " [[-t[=file]] -c cpu-list] [-P priority]",
+ " [[-t[=file]] [-e sys[:event]] [-c cpu-list] [-P priority]",
"",
" -h/--help: print this menu",
" -a/--auto: set automatic trace mode, stopping the session if argument in us latency is hit",
@@ -279,6 +280,7 @@ static void timerlat_top_usage(char *usage)
" -d/--duration time[m|h|d]: duration of the session in seconds",
" -D/--debug: print debug info",
" -t/--trace[=file]: save the stopped trace to [file|timerlat_trace.txt]",
+ " -e/--event <sys:event>: enable the <sys:event> in the trace instance, multiple -e are allowed",
" -n/--nano: display data in nanoseconds",
" -q/--quiet print only a summary at the end",
" -P/--priority o:prio|r:prio|f:prio|d:runtime:period : set scheduling parameters",
@@ -308,6 +310,7 @@ static struct timerlat_top_params
*timerlat_top_parse_args(int argc, char **argv)
{
struct timerlat_top_params *params;
+ struct trace_events *tevent;
long long auto_thresh;
int retval;
int c;
@@ -325,6 +328,7 @@ static struct timerlat_top_params
{"cpus", required_argument, 0, 'c'},
{"debug", no_argument, 0, 'D'},
{"duration", required_argument, 0, 'd'},
+ {"event", required_argument, 0, 'e'},
{"help", no_argument, 0, 'h'},
{"irq", required_argument, 0, 'i'},
{"nano", no_argument, 0, 'n'},
@@ -340,7 +344,7 @@ static struct timerlat_top_params
/* getopt_long stores the option index here. */
int option_index = 0;
- c = getopt_long(argc, argv, "a:c:d:Dhi:np:P:qs:t::T:",
+ c = getopt_long(argc, argv, "a:c:d:De:hi:np:P:qs:t::T:",
long_options, &option_index);
/* detect the end of the options. */
@@ -375,6 +379,21 @@ static struct timerlat_top_params
if (!params->duration)
timerlat_top_usage("Invalid -D duration\n");
break;
+ case 'e':
+ tevent = alloc_trace_event(optarg);
+ if (!tevent) {
+ err_msg("error alloc trace event");
+ exit(EXIT_FAILURE);
+ }
+
+ if (params->events)
+ tevent->next = params->events;
+ params->events = tevent;
+
+ /* if -e && !-t -> -t */
+ if (!params->trace_output)
+ params->trace_output = "timerlat_trace.txt";
+ break;
case 'h':
case '?':
timerlat_top_usage(NULL);
@@ -583,6 +602,13 @@ int timerlat_top_main(int argc, char *argv[])
err_msg("Failed to enable the trace instance\n");
goto out_top;
}
+
+ if (params->events) {
+ retval = enable_trace_events(&record->trace, params->events);
+ if (retval)
+ goto out_top;
+ }
+
trace_instance_start(&record->trace);
}
@@ -624,6 +650,8 @@ int timerlat_top_main(int argc, char *argv[])
}
out_top:
+ destroy_trace_events(&record->trace, params->events);
+ params->events = NULL;
timerlat_free_top(top->data);
osnoise_destroy_tool(record);
osnoise_destroy_tool(top);
--
2.34.1
