"trace-cmd reset" command should put all ftrace config to its default
state, but trace cpumask was not reseted. The patch sets cpumask to
its default value - all CPUs are enabled for tracing.
Signed-off-by: Tzvetomir Stoyanov (VMware) <tz.stoyanov@xxxxxxxxx>
---
tracecmd/trace-record.c | 35 +++++++++++++++++++++++++++++++++++
1 file changed, 35 insertions(+)
diff --git a/tracecmd/trace-record.c b/tracecmd/trace-record.c
index 69de82a..6f3520c 100644
--- a/tracecmd/trace-record.c
+++ b/tracecmd/trace-record.c
@@ -4096,6 +4096,40 @@ static void reset_clock(void)
write_instance_file(instance, "trace_clock", "local", "clock");
}
+static void reset_cpu_mask(void)
+{
+ struct buffer_instance *instance;
+ int cpus = count_cpus();
+ int fullwords;
+ char *buf;
+ int bits;
+ int len;
+
+ fullwords = cpus / 32;
+ bits = cpus % 32;
+ len = (fullwords + 1) * 9;
+
+ buf = malloc(len + 1);
+ if (!buf) {
+ warning("Unable to allocate %d bytes for cpu mask", len + 1);
+ return;
+ }
+ buf[0] = '\0';
+ if (bits) {
+ sprintf(buf, "%x", (1 << bits) - 1);
+ } else if (fullwords) {
+ strcat(buf, "ffffffff");
+ fullwords--;
+ }
+ while (fullwords-- > 0)
+ strcat(buf, ",ffffffff");
+
+ for_all_instances(instance)
+ write_instance_file(instance, "tracing_cpumask", buf, "cpumask");
+
+ free(buf);
+}
+
static void reset_event_pid(void)
{
add_event_pid("");
@@ -4808,6 +4842,7 @@ void trace_reset(int argc, char **argv)
reset_clock();
reset_event_pid();
reset_max_latency_instance();
+ reset_cpu_mask();
tracecmd_remove_instances();
clear_func_filters();
/* restore tracing_on to 1 */
--
2.21.0
|