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perf test bpf: Improve message about expected samples

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When failing on one of the BPF tests we were just stating:

  BPF filter result incorrect

Add some more info to help figuring out the problem:

 BPF filter result incorrect, expected 56, got 0 samples

This came out while investigating this failure, first seen after
updating the kernel to the 4.15.0-rc6 tag:

  [root@jouet ~]# perf test bpf
  39: BPF filter               :
  39.1: Basic BPF filtering    : FAILED!
  39.2: BPF pinning            : Skip
  39.3: BPF prologue generation: Skip
  39.4: BPF relocation checker : Skip
  [root@jouet ~]#

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: https://lkml.kernel.org/n/tip-403npu7daupv6b2bmxliv5pk@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo 2018-01-02 14:59:21 -03:00
parent 9128d3ed9d
commit 6703c9771d
1 changed files with 1 additions and 1 deletions
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2
tools/perf/tests/bpf.c
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@ -190,7 +190,7 @@ static int do_test(struct bpf_object *obj, int (*func)(void),
}
if (count != expect) {
pr_debug("BPF filter result incorrect\n");
pr_debug("BPF filter result incorrect, expected %d, got %d samples\n", expect, count);
goto out_delete_evlist;
}