[v4,23/25] trace-cmd report: Use the new latency API to read data

Commit Message

Tzvetomir Stoyanov (VMware) Oct. 8, 2021, 4:19 a.m. UTC

When reading latency trace data, use the new API
 tracecmd_latency_data_read()
It handles reading latency trace data from both version 6 and 7 trace
files.

Signed-off-by: Tzvetomir Stoyanov (VMware) <[e-mail]>
---
 tracecmd/trace-read.c | 18 ++++++++++--------
 1 file changed, 10 insertions(+), 8 deletions(-)

Patch

diff --git a/tracecmd/trace-read.c b/tracecmd/trace-read.c
index f7ffb89e..cafceffe 100644
--- a/tracecmd/trace-read.c
+++ b/tracecmd/trace-read.c
@@ -948,18 +948,20 @@  void trace_show_data(struct tracecmd_input *handle, struct tep_record *record)
 	printf("\n");
 }
 
-static void read_rest(void)
+static void read_latency(struct tracecmd_input *handle)
 {
-	char buf[BUFSIZ + 1];
+	char *buf = NULL;
+	size_t size = 0;
 	int r;
 
 	do {
-		r = read(input_fd, buf, BUFSIZ);
-		if (r > 0) {
-			buf[r] = 0;
-			printf("%s", buf);
-		}
+		r = tracecmd_latency_data_read(handle, &buf, &size);
+		if (r > 0)
+			printf("%.*s", r, buf);
 	} while (r > 0);
+
+	printf("\n");
+	free(buf);
 }
 
 static int
@@ -1243,7 +1245,7 @@  static void read_data_info(struct list_head *handle_list, enum output_type otype
 		if (ret > 0) {
 			if (multi_inputs)
 				die("latency traces do not work with multiple inputs");
-			read_rest();
+			read_latency(handles->handle);
 			return;
 		}