[PATCH 33/34] perf, tools: Default to cpu// for events v2

Andi Kleen
2012-10-18T23:20:00Z

When an event fails to parse and it's not in a new style format,
try to parse it again as a cpu event.

This allows to use sysfs exported events directly without //, so I can use

perf record -e tx-aborts ...

instead of

perf record -e cpu/tx-aborts/

v2: Handle multiple events
Signed-off-by: Andi Kleen <ak@linux.intel.com>
---
tools/perf/util/parse-events.c | 37 +++++++++++++++++++++++++++++++++++++
1 files changed, 37 insertions(+), 0 deletions(-)

diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index de1cb9e..8b08140 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -765,6 +765,23 @@ int parse_events_name(struct list_head *list, char *name)
return 0;
}

+static void str_append(char **s, int *len, const char *a)
+{
+ int olen = *s ? strlen(*s) : 0;
+ int nlen = olen + strlen(a) + 1;
+ if (*len < nlen) {
+ *len = *len * 2;
+ if (*len < nlen)
+ *len = nlen;
+ *s = realloc(*s, *len);
+ if (!*s)
+ exit(ENOMEM);
+ if (olen == 0)
+ **s = 0;
+ }
+ strcat(*s, a);
+}
+
static int parse_events__scanner(const char *str, void *data, int start_token)
{
YY_BUFFER_STATE buffer;
@@ -785,6 +802,26 @@ static int parse_events__scanner(const char *str, void *data, int start_token)
parse_events__flush_buffer(buffer, scanner);
parse_events__delete_buffer(buffer, scanner);
parse_events_lex_destroy(scanner);
+
+ if (ret && !strchr(str, '/')) {
+ char *o = strdup(str);
+ char *s = NULL;
+ char *t = o;
+ char *p;
+ int len = 0;
+
+ if (!o)
+ return ret;
+ while ((p = strsep(&t, ",")) != NULL) {
+ if (s)
+ str_append(&s, &len, ",");
+ str_append(&s, &len, "cpu/");
+ str_append(&s, &len, p);
+ str_append(&s, &len, "/");
+ }
+ free(o);
+ ret = parse_events__scanner(s, data, start_token);
+ }
return ret;
}

--
1.7.7.6