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perf tools: Add support for wildcard in tracepoint system name

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Adding support for wildcards '*?" in the tracepoint system part.

It's now possible to open all available tracepoints like:

  # perf stat -e '*:*' ls

You might need to increase limit for open files via ulimit.

If ftrace events tracepoints are configured in, the record command fails
on above event selection because of them.

The stat command disables counters that fails to open, the record
command fails completely. We probably want to be smarter here.

Signed-off-by: Jiri Olsa <jolsa@redhat.com>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1355749718-4355-3-git-send-email-jolsa@redhat.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Jiri Olsa 2012-12-17 14:08:37 +01:00 committed by Arnaldo Carvalho de Melo
parent 0bd3f0840b
commit f35488f97b
1 changed files with 46 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

51
tools/perf/util/parse-events.c
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@ -380,8 +380,8 @@ static int add_tracepoint(struct list_head **listp, int *idx,
return 0;
}
static int add_tracepoint_multi(struct list_head **list, int *idx,
char *sys_name, char *evt_name)
static int add_tracepoint_multi_event(struct list_head **list, int *idx,
char *sys_name, char *evt_name)
{
char evt_path[MAXPATHLEN];
struct dirent *evt_ent;
@ -412,6 +412,46 @@ static int add_tracepoint_multi(struct list_head **list, int *idx,
return ret;
}
static int add_tracepoint_event(struct list_head **list, int *idx,
char *sys_name, char *evt_name)
{
return strpbrk(evt_name, "*?") ?
add_tracepoint_multi_event(list, idx, sys_name, evt_name) :
add_tracepoint(list, idx, sys_name, evt_name);
}
static int add_tracepoint_multi_sys(struct list_head **list, int *idx,
char *sys_name, char *evt_name)
{
struct dirent *events_ent;
DIR *events_dir;
int ret = 0;
events_dir = opendir(tracing_events_path);
if (!events_dir) {
perror("Can't open event dir");
return -1;
}
while (!ret && (events_ent = readdir(events_dir))) {
if (!strcmp(events_ent->d_name, ".")
|| !strcmp(events_ent->d_name, "..")
|| !strcmp(events_ent->d_name, "enable")
|| !strcmp(events_ent->d_name, "header_event")
|| !strcmp(events_ent->d_name, "header_page"))
continue;
if (!strglobmatch(events_ent->d_name, sys_name))
continue;
ret = add_tracepoint_event(list, idx, events_ent->d_name,
evt_name);
}
closedir(events_dir);
return ret;
}
int parse_events_add_tracepoint(struct list_head **list, int *idx,
char *sys, char *event)
{
@ -421,9 +461,10 @@ int parse_events_add_tracepoint(struct list_head **list, int *idx,
if (ret)
return ret;
return strpbrk(event, "*?") ?
add_tracepoint_multi(list, idx, sys, event) :
add_tracepoint(list, idx, sys, event);
if (strpbrk(sys, "*?"))
return add_tracepoint_multi_sys(list, idx, sys, event);
else
return add_tracepoint_event(list, idx, sys, event);
}
static int