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perf test: Fix subtest status alignment for multi-digit indexes

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When running perf test, the status column (: Ok) became misaligned when
subtest indexes reached 2 or 3 digits (e.g. 9.100 vs 9.9 vs 10.1). This
occurred because the subtest description field width (subw) was
statically fixed to width - 2, assuming all subtest index prefixes were
exactly 7 characters wide.

Dynamically calculate subw based on the exact character length of the
test suite and subtest index prefix. This ensures the status column is
perfectly aligned vertically across all test outputs regardless of
subtest index digit count.

Assisted-by: Gemini-CLI:Google Gemini 3
Signed-off-by: Ian Rogers <irogers@google.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@linaro.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Ian Rogers 2026-06-02 10:41:22 -07:00 committed by Arnaldo Carvalho de Melo
parent 33f20342ba
commit 94ac3ce427
1 changed files with 5 additions and 3 deletions
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8
tools/perf/tests/builtin-test.c
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@ -376,10 +376,12 @@ static int print_test_result(struct test_suite *t, int curr_suite, int curr_test
int result, int width, int running)
{
if (test_suite__num_test_cases(t) > 1) {
int subw = width > 2 ? width - 2 : width;
char prefix[32];
int len = snprintf(prefix, sizeof(prefix), "%3d.%1d:",
curr_suite + 1, curr_test_case + 1);
int subw = len >= 4 ? width + 4 - len : width;
pr_info("%3d.%1d: %-*s:", curr_suite + 1, curr_test_case + 1, subw,
test_description(t, curr_test_case));
pr_info("%s %-*s:", prefix, subw, test_description(t, curr_test_case));
} else
pr_info("%3d: %-*s:", curr_suite + 1, width, test_description(t, curr_test_case));