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authorJiri Olsa <jolsa@kernel.org>2015-08-26 16:46:44 +0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2015-08-28 20:53:51 +0300
commit9f44f0cc1c32f1542071447a9493652bbc03facb (patch)
tree9297db712188a22d7339b286610f2fd6d409fc0f /tools
parent0b5a7935f3b5b7d40293b02c3e552f3d67af208b (diff)
downloadlinux-9f44f0cc1c32f1542071447a9493652bbc03facb.tar.xz
perf tools: Add tracing_path and remove unneeded functions
There's no need for find_tracing_dir, because perf already searches for debugfs/tracefs mount on start and populate tracing_events_path. Adding tracing_path to carry tracing dir string to be used in get_tracing_file instead of calling find_tracing_dir. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: Raphael Beamonte <raphael.beamonte@gmail.com> Cc: David Ahern <dsahern@gmail.com> Cc: Matt Fleming <matt@codeblueprint.co.uk> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1440596813-12844-3-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools')
-rw-r--r--tools/perf/util/util.c56
-rw-r--r--tools/perf/util/util.h2
2 files changed, 5 insertions, 53 deletions
diff --git a/tools/perf/util/util.c b/tools/perf/util/util.c
index f7adf1203df1..d33c34196a5a 100644
--- a/tools/perf/util/util.c
+++ b/tools/perf/util/util.c
@@ -34,6 +34,7 @@ bool test_attr__enabled;
bool perf_host = true;
bool perf_guest = false;
+char tracing_path[PATH_MAX + 1] = "/sys/kernel/debug/tracing";
char tracing_events_path[PATH_MAX + 1] = "/sys/kernel/debug/tracing/events";
void event_attr_init(struct perf_event_attr *attr)
@@ -391,6 +392,8 @@ void set_term_quiet_input(struct termios *old)
static void set_tracing_events_path(const char *tracing, const char *mountpoint)
{
+ snprintf(tracing_path, sizeof(tracing_path), "%s/%s",
+ mountpoint, tracing);
snprintf(tracing_events_path, sizeof(tracing_events_path), "%s/%s%s",
mountpoint, tracing, "events");
}
@@ -440,62 +443,11 @@ void perf_debugfs_set_path(const char *mntpt)
set_tracing_events_path("tracing/", mntpt);
}
-static const char *find_tracefs(void)
-{
- const char *path = __perf_tracefs_mount(NULL);
-
- return path;
-}
-
-static const char *find_debugfs(void)
-{
- const char *path = __perf_debugfs_mount(NULL);
-
- if (!path)
- fprintf(stderr, "Your kernel does not support the debugfs filesystem");
-
- return path;
-}
-
-/*
- * Finds the path to the debugfs/tracing
- * Allocates the string and stores it.
- */
-const char *find_tracing_dir(void)
-{
- const char *tracing_dir = "";
- static char *tracing;
- static int tracing_found;
- const char *debugfs;
-
- if (tracing_found)
- return tracing;
-
- debugfs = find_tracefs();
- if (!debugfs) {
- tracing_dir = "/tracing";
- debugfs = find_debugfs();
- if (!debugfs)
- return NULL;
- }
-
- if (asprintf(&tracing, "%s%s", debugfs, tracing_dir) < 0)
- return NULL;
-
- tracing_found = 1;
- return tracing;
-}
-
char *get_tracing_file(const char *name)
{
- const char *tracing;
char *file;
- tracing = find_tracing_dir();
- if (!tracing)
- return NULL;
-
- if (asprintf(&file, "%s/%s", tracing, name) < 0)
+ if (asprintf(&file, "%s/%s", tracing_path, name) < 0)
return NULL;
return file;
diff --git a/tools/perf/util/util.h b/tools/perf/util/util.h
index 88a891562a47..291be1d84bc3 100644
--- a/tools/perf/util/util.h
+++ b/tools/perf/util/util.h
@@ -83,10 +83,10 @@
extern const char *graph_line;
extern const char *graph_dotted_line;
extern char buildid_dir[];
+extern char tracing_path[];
extern char tracing_events_path[];
extern void perf_debugfs_set_path(const char *mountpoint);
const char *perf_debugfs_mount(const char *mountpoint);
-const char *find_tracing_dir(void);
char *get_tracing_file(const char *name);
void put_tracing_file(char *file);