diff mbox series

[v4,12/25] trace-cmd library: Do not write CPUs with empty trace data

Message ID 20211008041958.976309-13-tz.stoyanov@gmail.com (mailing list archive)
State Superseded
Headers show
Series Trace file version 7 - sections | expand

Commit Message

Tzvetomir Stoyanov (VMware) Oct. 8, 2021, 4:19 a.m. UTC 
Trace file version 7 has more flexible design, which allows to write only
CPUs with trace data in the file. If a CPU has no recorded trace data,
do not put it in the trace file version 7.

Signed-off-by: Tzvetomir Stoyanov (VMware) <tz.stoyanov@gmail.com>
---
 lib/trace-cmd/trace-output.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/lib/trace-cmd/trace-output.c b/lib/trace-cmd/trace-output.c
index ebe5b179..ffcc62e1 100644
--- a/lib/trace-cmd/trace-output.c
+++ b/lib/trace-cmd/trace-output.c
@@ -2076,8 +2076,10 @@  int tracecmd_write_cpu_data(struct tracecmd_output *handle,
 
 	if (i < cpus)
 		ret = -1;
-	else
+	else if (size || !HAS_SECTIONS(handle))
 		ret = out_write_cpu_data(handle, cpus, data, buff_name);
+	else
+		ret = 0;
 
 	for (i--; i >= 0; i--)
 		close(data[i].fd);