Store multiplier and shift, required for TSC clock to nanosecond
conversion in the metadata of the trace file.
Signed-off-by: Tzvetomir Stoyanov (VMware) <tz.stoyanov@xxxxxxxxx>
---
tracecmd/trace-record.c | 30 ++++++++++++++++++++++++++++++
1 file changed, 30 insertions(+)
diff --git a/tracecmd/trace-record.c b/tracecmd/trace-record.c
index 15521d0d..1313af03 100644
--- a/tracecmd/trace-record.c
+++ b/tracecmd/trace-record.c
@@ -666,6 +666,17 @@ static void delete_thread_data(void)
}
}
+static void
+add_tsc2nsec(struct tracecmd_output *handle, struct buffer_instance *instance)
+{
+ int array[] = { instance->tsc2nsec.mult,
+ instance->tsc2nsec.shift,
+ instance->tsc2nsec.offset};
+
+ tracecmd_add_option(handle, TRACECMD_OPTION_TSC2NSEC,
+ sizeof(array), array);
+}
+
static void host_tsync_complete(struct buffer_instance *instance)
{
struct tracecmd_output *handle = NULL;
@@ -680,6 +691,16 @@ static void host_tsync_complete(struct buffer_instance *instance)
handle = tracecmd_get_output_handle_fd(fd);
if (!handle)
die("cannot create output handle");
+
+ /*
+ * If TSC is used as current trace clock and there is
+ * information for tsc to nanosecond conversion, store it
+ * in the trace file
+ */
+ if (instance->tsc2nsec.mult && instance->clock &&
+ !strncmp(top_instance.clock, TSC_CLOCK, strlen(TSC_CLOCK)))
+ add_tsc2nsec(handle, instance);
+
tracecmd_write_guest_time_shift(handle, instance->tsync);
tracecmd_append_options(handle);
tracecmd_output_close(handle);
@@ -4269,6 +4290,15 @@ static void record_data(struct common_record_context *ctx)
add_guest_info(handle, instance);
}
+ /*
+ * If TSC is used as current trace clock and there is
+ * information for tsc to nanosecond conversion, store it
+ * in the trace file
+ */
+ if (top_instance.tsc2nsec.mult && top_instance.clock &&
+ !strncmp(top_instance.clock, TSC_CLOCK, strlen(TSC_CLOCK)))
+ add_tsc2nsec(handle, &top_instance);
+
if (tracecmd_write_cmdlines(handle))
die("Writing cmdlines");
--
2.29.2
|