[PATCH 2/6] perf header: Display missing features

From: Jiri Olsa
Date: Tue Oct 11 2016 - 08:14:55 EST


Display missing features in header info, like:

$ perf report --header-only
# ========
# captured on: Mon Oct 10 09:39:47 2016
...
# missing features: HEADER_TRACING_DATA HEADER_CPU_TOPOLOGY ...

Link: http://lkml.kernel.org/n/tip-bh5gp84gobdmyl345dcp64se@xxxxxxxxxxxxxx
Signed-off-by: Jiri Olsa <jolsa@xxxxxxxxxx>
---
tools/perf/util/header.c | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
index b227dfab56c3..59b67aefa8b2 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -2251,7 +2251,7 @@ int perf_header__fprintf_info(struct perf_session *session, FILE *fp, bool full)
struct perf_header *header = &session->header;
int fd = perf_data_file__fd(session->file);
struct stat st;
- int ret;
+ int ret, bit;

hd.fp = fp;
hd.full = full;
@@ -2264,6 +2264,14 @@ int perf_header__fprintf_info(struct perf_session *session, FILE *fp, bool full)

perf_header__process_sections(header, fd, &hd,
perf_file_section__fprintf_info);
+
+ fprintf(fp, "# missing features: ");
+ for_each_clear_bit(bit, header->adds_features, HEADER_LAST_FEATURE) {
+ if (bit)
+ fprintf(fp, "%s ", feat_ops[bit].name);
+ }
+
+ fprintf(fp, "\n");
return 0;
}

--
2.7.4