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perf util: Use evsel->name to get tracepoint_paths

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Most tracepoint events already have their system and event name in
->name field so that searching whole event tracing directory for each
evsel to match given id is suboptimal.

Factor out this routine into tracepoint_name_to_path().  In case of en
invalid name, it'll try to find path using id again.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/r/1372230862-15861-3-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Namhyung Kim 2013-06-26 16:14:05 +09:00 committed by Arnaldo Carvalho de Melo
parent 167aedc44e
commit e7c93f09b8
3 changed files with 39 additions and 0 deletions
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23
tools/perf/util/parse-events.c
View File

@ -217,6 +217,29 @@ struct tracepoint_path *tracepoint_id_to_path(u64 config)
return NULL;
}
struct tracepoint_path *tracepoint_name_to_path(const char *name)
{
struct tracepoint_path *path = zalloc(sizeof(*path));
char *str = strchr(name, ':');
if (path == NULL || str == NULL) {
free(path);
return NULL;
}
path->system = strndup(name, str - name);
path->name = strdup(str+1);
if (path->system == NULL || path->name == NULL) {
free(path->system);
free(path->name);
free(path);
path = NULL;
}
return path;
}
const char *event_type(int type)
{
switch (type) {

1
tools/perf/util/parse-events.h
View File

@ -23,6 +23,7 @@ struct tracepoint_path {
};
extern struct tracepoint_path *tracepoint_id_to_path(u64 config);
extern struct tracepoint_path *tracepoint_name_to_path(const char *name);
extern bool have_tracepoints(struct list_head *evlist);
const char *event_type(int type);

15
tools/perf/util/trace-event-info.c
View File

@ -414,12 +414,27 @@ get_tracepoints_path(struct list_head *pattrs)
if (pos->attr.type != PERF_TYPE_TRACEPOINT)
continue;
++nr_tracepoints;
if (pos->name) {
ppath->next = tracepoint_name_to_path(pos->name);
if (ppath->next)
goto next;
if (strchr(pos->name, ':') == NULL)
goto try_id;
goto error;
}
try_id:
ppath->next = tracepoint_id_to_path(pos->attr.config);
if (!ppath->next) {
error:
pr_debug("No memory to alloc tracepoints list\n");
put_tracepoints_path(&path);
return NULL;
}
next:
ppath = ppath->next;
}