[PATCH RFC 1/7] perf jevents: Add support for an extra directory level

John Garry
2020-01-24T14:39:16Z

Currently we support upto a level 2 directory, and level 2 would be in the
form vendor/platform.

Add support for a further level, to hold specific categories of events for
when we want to segregate them for matching purposes.

Signed-off-by: John Garry <john.garry@huawei.com>
---
tools/perf/pmu-events/jevents.c | 11 ++++++++---
1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/tools/perf/pmu-events/jevents.c b/tools/perf/pmu-events/jevents.c
index 079c77b6a2fd..8af05b94a37d 100644
--- a/tools/perf/pmu-events/jevents.c
+++ b/tools/perf/pmu-events/jevents.c
@@ -960,15 +960,20 @@ static int process_one_file(const char *fpath, const struct stat *sb,
int level = ftwbuf->level;
int err = 0;

- if (level == 2 && is_dir) {
+ if (level >= 2 && is_dir) {
+ int count = 0;
/*
* For level 2 directory, bname will include parent name,
* like vendor/platform. So search back from platform dir
* to find this.
+ * Something similar for level 3 directory, but we're a PMU
+ * category folder, like vendor/platform/cpu.
*/
bname = (char *) fpath + ftwbuf->base - 2;
for (;;) {
if (*bname == '/')
+ count++;
+ if (count == level - 1)
break;
bname--;
}
@@ -981,13 +986,13 @@ static int process_one_file(const char *fpath, const struct stat *sb,
level, sb->st_size, bname, fpath);

/* base dir or too deep */
- if (level == 0 || level > 3)
+ if (level == 0 || level > 4)
return 0;

/* model directory, reset topic */
if ((level == 1 && is_dir && is_leaf_dir(fpath)) ||
- (level == 2 && is_dir)) {
+ (level >= 2 && is_dir && is_leaf_dir(fpath))) {
if (close_table)
print_events_table_suffix(eventsfp);

--
2.17.1