From: "Steven Rostedt (Google)" <rostedt@xxxxxxxxxxx>
[
Note, this depends on libtracefs 1.8 and can not be added until
that's released.
]
Show the sub-buffer size if the file system supports it and it is different
than the architecture page size.
Signed-off-by: Steven Rostedt (Google) <rostedt@xxxxxxxxxxx>
---
tracecmd/trace-stat.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/tracecmd/trace-stat.c b/tracecmd/trace-stat.c
index 9a6e22254b48..1d95d9934b47 100644
--- a/tracecmd/trace-stat.c
+++ b/tracecmd/trace-stat.c
@@ -633,6 +633,8 @@ static void report_buffers(struct buffer_instance *instance)
char *str;
char *cont;
char file[FILE_SIZE];
+ int pagesize;
+ int bufsize;
int cpu;
str = tracefs_instance_file_read(instance->tracefs, "buffer_size_kb", NULL);
@@ -678,6 +680,11 @@ static void report_buffers(struct buffer_instance *instance)
printf("\nBuffer total size in kilobytes:\n");
printf(" %s\n", str);
+ pagesize = getpagesize();
+ bufsize = tracefs_instance_get_subbuf_size(instance->tracefs);
+ if (bufsize > 0 && bufsize * 1024 != pagesize)
+ printf("\nSub-buffer size in kilobytes:\n %d\n", bufsize);
+
out:
free(str);
}
--
2.42.0
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