@@ -28,6 +28,10 @@ sub directory. Thus for the Silvermont X86 CPU:
Cache.json Memory.json Virtual-Memory.json
Frontend.json Pipeline.json
+The JSONs folder for a CPU model/family may be placed in the root arch
+folder, or may be placed in a vendor sub-folder under the arch folder
+for instances where the arch and vendor are not the same.
+
Using the JSON files and the mapfile, 'jevents' generates the C source file,
'pmu-events.c', which encodes the two sets of tables:
@@ -572,7 +572,7 @@ static char *file_name_to_table_name(char *fname)
* Derive rest of table name from basename of the JSON file,
* replacing hyphens and stripping out .json suffix.
*/
- n = asprintf(&tblname, "pme_%s", basename(fname));
+ n = asprintf(&tblname, "pme_%s", fname);
if (n < 0) {
pr_info("%s: asprintf() error %s for file %s\n", prog,
strerror(errno), fname);
@@ -582,7 +582,7 @@ static char *file_name_to_table_name(char *fname)
for (i = 0; i < strlen(tblname); i++) {
c = tblname[i];
- if (c == '-')
+ if (c == '-' || c == '/')
tblname[i] = '_';
else if (c == '.') {
tblname[i] = '\0';
@@ -739,25 +739,77 @@ static int get_maxfds(void)
static FILE *eventsfp;
static char *mapfile;
+static int is_leaf_dir(const char *fpath)
+{
+ DIR *d;
+ struct dirent *dir;
+ int res = 1;
+
+ d = opendir(fpath);
+ if (!d)
+ return 0;
+
+ while ((dir = readdir(d)) != NULL) {
+ if (dir->d_type == DT_DIR && dir->d_name[0] != '.') {
+ res = 0;
+ break;
+ } else if (dir->d_type == DT_UNKNOWN) {
+ char path[PATH_MAX];
+ struct stat st;
+
+ sprintf(path, "%s/%s", fpath, dir->d_name);
+ if (stat(path, &st))
+ break;
+
+ if (S_ISDIR(st.st_mode)) {
+ res = 0;
+ break;
+ }
+ }
+ }
+
+ closedir(d);
+
+ return res;
+}
+
static int process_one_file(const char *fpath, const struct stat *sb,
int typeflag, struct FTW *ftwbuf)
{
- char *tblname, *bname = (char *) fpath + ftwbuf->base;
+ char *tblname, *bname;
int is_dir = typeflag == FTW_D;
int is_file = typeflag == FTW_F;
int level = ftwbuf->level;
int err = 0;
+ if (level == 2 && is_dir) {
+ /*
+ * For level 2 directory, bname will include parent name,
+ * like vendor/platform. So search back from platform dir
+ * to find this.
+ */
+ bname = (char *) fpath + ftwbuf->base - 2;
+ for (;;) {
+ if (*bname == '/')
+ break;
+ bname--;
+ }
+ bname++;
+ } else
+ bname = (char *) fpath + ftwbuf->base;
+
pr_debug("%s %d %7jd %-20s %s\n",
is_file ? "f" : is_dir ? "d" : "x",
level, sb->st_size, bname, fpath);
- /* base dir */
- if (level == 0)
+ /* base dir or too deep */
+ if (level == 0 || level > 3)
return 0;
+
/* model directory, reset topic */
- if (level == 1 && is_dir) {
+ if ((level == 1 && is_dir && is_leaf_dir(fpath)) ||
+ (level == 2 && is_dir)) {
if (close_table)
print_events_table_suffix(eventsfp);
For some architectures (like arm), it is required to support a vendor subdirectory and not locate all the JSONs for a specific vendor in the same folder. This is because all the events for the same vendor will be placed in the same pmu events table, which may cause conflict. This conflict would be in the instance that a vendor's custom implemented events do have the same meaning on different platforms, so events in the pmu table would conflict. In addition, per list command may show events which are not even supported for a given platform. This patch adds support for a arch/vendor/platform directory hierarchy, while maintaining backwards-compatibility for existing arch/platform structure. In this, each platform would always have its own pmu events table. In generated file pmu_events.c, each platform table name is in the format pme{_vendor}_platform, like this: struct pmu_events_map pmu_events_map[] = { { .cpuid = "0x00000000420f5160", .version = "v1", .type = "core", .table = pme_cavium_thunderx2 }, { .cpuid = 0, .version = 0, .type = 0, .table = 0, }, }; Signed-off-by: John Garry <john.garry@huawei.com> Acked-by: Jiri Olsa <jolsa@kernel.org> --- tools/perf/pmu-events/README | 4 +++ tools/perf/pmu-events/jevents.c | 64 +++++++++++++++++++++++++++++++++++++---- 2 files changed, 62 insertions(+), 6 deletions(-)