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authorArnaldo Carvalho de Melo <acme@redhat.com>2011-01-04 15:40:08 +0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2011-01-05 19:52:01 +0300
commit454a3bbe9b75eb8cbddffcf383fbb8e97ea78f52 (patch)
treed10cbe4a83a625908abf35581922b8ed3d6df2eb /tools
parent74d91e3c6a66359bb754fb5d8a5b54fb6ba2f9a6 (diff)
downloadlinux-454a3bbe9b75eb8cbddffcf383fbb8e97ea78f52.tar.xz
perf test: Clarify some error reports in the open syscall test
Rebooted my devel machine, first thing I ran was perf test, that expects debugfs to be mounted, test fails. Be more clear about it. Also add missing newlines and add more informative message when sys_perf_event_open fails. Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Tom Zanussi <tzanussi@gmail.com> LKML-Reference: <new-submission> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools')
-rw-r--r--tools/perf/builtin-test.c18
1 files changed, 11 insertions, 7 deletions
diff --git a/tools/perf/builtin-test.c b/tools/perf/builtin-test.c
index 6c991529f62b..1c984342a579 100644
--- a/tools/perf/builtin-test.c
+++ b/tools/perf/builtin-test.c
@@ -268,24 +268,26 @@ static int test__open_syscall_event(void)
int id = trace_event__id("sys_enter_open");
if (id < 0) {
- pr_debug("trace_event__id(\"sys_enter_open\") ");
+ pr_debug("is debugfs mounted on /sys/kernel/debug?\n");
return -1;
}
threads = thread_map__new(-1, getpid());
if (threads == NULL) {
- pr_debug("thread_map__new ");
+ pr_debug("thread_map__new\n");
return -1;
}
evsel = perf_evsel__new(PERF_TYPE_TRACEPOINT, id, 0);
if (evsel == NULL) {
- pr_debug("perf_evsel__new ");
+ pr_debug("perf_evsel__new\n");
goto out_thread_map_delete;
}
if (perf_evsel__open_per_thread(evsel, threads) < 0) {
- pr_debug("perf_evsel__open_per_thread ");
+ pr_debug("failed to open counter: %s, "
+ "tweak /proc/sys/kernel/perf_event_paranoid?\n",
+ strerror(errno));
goto out_evsel_delete;
}
@@ -295,13 +297,15 @@ static int test__open_syscall_event(void)
}
if (perf_evsel__read_on_cpu(evsel, 0, 0) < 0) {
- pr_debug("perf_evsel__open_read_on_cpu ");
+ pr_debug("perf_evsel__open_read_on_cpu\n");
goto out_close_fd;
}
- if (evsel->counts->cpu[0].val != nr_open_calls)
- pr_debug("perf_evsel__read_on_cpu: expected to intercept %d calls, got %Ld ",
+ if (evsel->counts->cpu[0].val != nr_open_calls) {
+ pr_debug("perf_evsel__read_on_cpu: expected to intercept %d calls, got %Ld\n",
nr_open_calls, evsel->counts->cpu[0].val);
+ goto out_close_fd;
+ }
err = 0;
out_close_fd: