From: "Steven Rostedt (Google)" <rostedt@xxxxxxxxxxx>
If the time synchronization protocol for the recorder to a agent proxy is
KVM, then it means that the TSC clock must be used. Force it when this is
discovered.
Signed-off-by: Steven Rostedt (Google) <rostedt@xxxxxxxxxxx>
---
tracecmd/trace-record.c | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/tracecmd/trace-record.c b/tracecmd/trace-record.c
index ce20402af7c2..169836bd493c 100644
--- a/tracecmd/trace-record.c
+++ b/tracecmd/trace-record.c
@@ -3849,16 +3849,29 @@ static int open_guest_fifos(const char *guest, int **fds)
return i;
}
+static bool clock_is_supported(struct tracefs_instance *instance, const char *clock);
+
static int host_tsync(struct common_record_context *ctx,
struct buffer_instance *instance,
unsigned int tsync_port, char *proto)
{
+ struct buffer_instance *iter_instance;
int guest_id = -1;
int fd;
if (!proto)
return -1;
+ /* If connecting to a proxy, the clock may still need to be set */
+ if (strcmp(proto, "kvm") == 0 &&
+ clock_is_supported(NULL, TSC_CLOCK)) {
+ ctx->clock = TSC_CLOCK;
+ for_all_instances(iter_instance) {
+ iter_instance->clock = TSC_CLOCK;
+ set_clock(ctx, iter_instance);
+ }
+ }
+
if (is_network(instance)) {
fd = connect_port(instance->name, tsync_port,
instance->port_type);
--
2.35.1
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