From: Arnaldo Carvalho de Melo <[email protected]> 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 <[email protected]> Cc: David Ahern <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Namhyung Kim <[email protected]> Cc: Wang Nan <[email protected]> Link: https://lkml.kernel.org/n/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]> --- tools/perf/tests/bpf.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/perf/tests/bpf.c b/tools/perf/tests/bpf.c index c433dd30975a..057c6b8fdb53 100644 --- a/tools/perf/tests/bpf.c +++ b/tools/perf/tests/bpf.c @@ -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; } -- 2.14.3
