diff options
| author | Ingo Molnar <mingo@elte.hu> | 2009-06-07 17:46:24 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-06-07 17:46:24 +0200 |
| commit | 30c806a094493beb7691bc7957dfa02dee96230a (patch) | |
| tree | 050253f0a69d5fab3cee07c07061e1468ac3c4f1 /tools/perf/builtin-top.c | |
| parent | 3da297a60f7e8840f79f7d0b343af078890939ea (diff) | |
perf_counter tools: Handle kernels with !CONFIG_PERF_COUNTER
If perf is run on a !CONFIG_PERF_COUNTER kernel right now it
bails out with no messages or with confusing messages.
Standardize this case some more and explain the situation.
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'tools/perf/builtin-top.c')
| -rw-r--r-- | tools/perf/builtin-top.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c index 1f8c97d5c32..be1698f1189 100644 --- a/tools/perf/builtin-top.c +++ b/tools/perf/builtin-top.c @@ -551,10 +551,6 @@ try_again: if (fd[i][counter] < 0) { int err = errno; - if (verbose) - error("sys_perf_counter_open() syscall returned with %d (%s)\n", - fd[i][counter], strerror(err)); - if (err == EPERM) die("No permission - are you root?\n"); /* @@ -572,6 +568,10 @@ try_again: attr->config = PERF_COUNT_CPU_CLOCK; goto try_again; } + printf("\n"); + error("perfcounter syscall returned with %d (%s)\n", + fd[i][counter], strerror(err)); + die("No CONFIG_PERF_COUNTERS=y kernel support configured?\n"); exit(-1); } assert(fd[i][counter] >= 0); |