diff options
| author | Andrii Nakryiko <andrii@kernel.org> | 2022-10-05 19:14:49 +0300 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2022-10-06 02:55:11 +0300 |
| commit | 6df2eb45e378f38ca42776276e7bb5b5078c12cf (patch) | |
| tree | 3c04a3c7e55fd98857faae8eaffcf55ded9633fc /tools/testing/selftests/bpf/veristat.c | |
| parent | 2a72f5951ac6d613216a93ae3e172cabb04aaefc (diff) | |
| download | linux-6df2eb45e378f38ca42776276e7bb5b5078c12cf.tar.xz | |
selftests/bpf: avoid reporting +100% difference in veristat for actual 0%
In special case when both base and comparison values are 0, veristat
currently reports "+0 (+100%)" difference, which is quite confusing. Fix
it up to be "+0 (+0%)".
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/r/20221005161450.1064469-2-andrii@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'tools/testing/selftests/bpf/veristat.c')
| -rw-r--r-- | tools/testing/selftests/bpf/veristat.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/tools/testing/selftests/bpf/veristat.c b/tools/testing/selftests/bpf/veristat.c index b0d83a28e348..38f678122a7d 100644 --- a/tools/testing/selftests/bpf/veristat.c +++ b/tools/testing/selftests/bpf/veristat.c @@ -1104,17 +1104,21 @@ static void output_comp_stats(const struct verif_stats *base, const struct verif else snprintf(diff_buf, sizeof(diff_buf), "%s", "MISMATCH"); } else { + double p = 0.0; + snprintf(base_buf, sizeof(base_buf), "%ld", base_val); snprintf(comp_buf, sizeof(comp_buf), "%ld", comp_val); diff_val = comp_val - base_val; if (base == &fallback_stats || comp == &fallback_stats || base_val == 0) { - snprintf(diff_buf, sizeof(diff_buf), "%+ld (%+.2lf%%)", - diff_val, comp_val < base_val ? -100.0 : 100.0); + if (comp_val == base_val) + p = 0.0; /* avoid +0 (+100%) case */ + else + p = comp_val < base_val ? -100.0 : 100.0; } else { - snprintf(diff_buf, sizeof(diff_buf), "%+ld (%+.2lf%%)", - diff_val, diff_val * 100.0 / base_val); + p = diff_val * 100.0 / base_val; } + snprintf(diff_buf, sizeof(diff_buf), "%+ld (%+.2lf%%)", diff_val, p); } switch (fmt) { |