When tracing host and guest machines, both should use the same
tracing clock for event timestamps. If a clock is specified
as host tracing argument, with option "-C clock_name", the same
is injected as guest tracing argument. If the user wants to use
different tracing clocks, it can specify it using "-C clock_name"
as guest tracing argument. In that case, the one specified by
the user has higher priority.
Signed-off-by: Tzvetomir Stoyanov (VMware) <tz.stoyanov@xxxxxxxxx>
---
tracecmd/trace-record.c | 19 +++++++++++++++++--
1 file changed, 17 insertions(+), 2 deletions(-)
diff --git a/tracecmd/trace-record.c b/tracecmd/trace-record.c
index 49730d6..e7fb1bd 100644
--- a/tracecmd/trace-record.c
+++ b/tracecmd/trace-record.c
@@ -5405,6 +5405,8 @@ static void parse_record_options(int argc,
char *sav;
int name_counter = 0;
int neg_event = 0;
+ struct buffer_instance *instance;
+ bool guest_config = false;
init_common_record_context(ctx, curr_cmd);
@@ -5562,6 +5564,7 @@ static void parse_record_options(int argc,
break;
case 'C':
ctx->instance->ftrace->clock = optarg;
+ guest_config = true;
break;
case 'v':
neg_event = 1;
@@ -5779,14 +5782,26 @@ static void parse_record_options(int argc,
/* If --date is specified, prepend it to all guest VM flags */
if (ctx->date) {
- struct buffer_instance *instance;
-
for_all_instances(instance) {
if (is_guest(instance))
add_argv(instance, "--date", true);
}
}
+ if (guest_config) {
+ /* If -C is specified, prepend clock to all guest VM flags */
+ for_all_instances(instance) {
+ if (top_instance.ftrace->clock) {
+ if (is_guest(instance)) {
+ add_argv(instance,
+ (char *)top_instance.ftrace->clock,
+ true);
+ add_argv(instance, "-C", true);
+ }
+ }
+ }
+ }
+
if (!ctx->filtered && ctx->instance->filter_mod)
add_func(&ctx->instance->filter_funcs,
ctx->instance->filter_mod, "*");
--
2.23.0
|