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perf tools: Make perf aware of tracefs

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As tracefs may be mounted instead of debugfs to get to the event
directories, have perf know about tracefs, and use that file system over
debugfs if it is present.

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: http://lkml.kernel.org/r/20150202193553.340946602@goodmis.org
[ Fixed up error messages about tracefs pointed out by Namhyung ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Steven Rostedt (Red Hat) 2015-02-02 14:35:07 -05:00 • committed by Arnaldo Carvalho de Melo
parent dd6dda27a8
commit 23773ca18b
9 changed files with 91 additions and 25 deletions
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7
tools/perf/tests/open-syscall.c
View file

@ -18,7 +18,12 @@ int test__open_syscall_event(void)
evsel = perf_evsel__newtp("syscalls", "sys_enter_open");
if (evsel == NULL) {
pr_debug("is debugfs mounted on /sys/kernel/debug?\n");
if (tracefs_configured())
pr_debug("is tracefs mounted on /sys/kernel/tracing?\n");
else if (debugfs_configured())
pr_debug("is debugfs mounted on /sys/kernel/debug?\n");
else
pr_debug("Neither tracefs or debugfs is enabled in this kernel\n");
goto out_thread_map_delete;
}