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The perf.data file may contain a bpf_prog_info or bpf_btf feature. If the contents of these are empty then nothing is displayed. Rather than display nothing and not account for the file space, display an empty message. Signed-off-by: Ian Rogers <irogers@google.com> Link: https://lore.kernel.org/r/20250617223356.2752099-4-irogers@google.com Signed-off-by: Namhyung Kim <namhyung@kernel.org>