08158c111d7d87d88269d9f873a2fc54b87bcb99 - selftests/bpf: Add BPF batch-timing library

Tue, 28 Apr 2026 01:22:59 +0200

selftests/bpf: Add BPF batch-timing libraryAdd a reusable timing library for BPF benchmarks that need to measureBPF program execution time.The BPF side (progs/bench_bpf_timing.bpf.h) provides per-CPU samplearrays and BENCH_BPF_LOOP(), a macro that brackets batch_itersiterations with bpf_ktime_get_ns() reads and records the elapsed time.One extra untimed iteration runs afterward for output validation.The userspace side (benchs/bench_bpf_timing.c) collects samples fromthe skeleton BSS, computes percentile statistics, and auto-calibratesbatch_iters to target ~10 ms per batch.Signed-off-by: Puranjay Mohan Link: https://lore.kernel.org/r/20260427232313.1582588-3-puranjay@kernel.orgSigned-off-by: Alexei Starovoitov List of files: /linux/tools/testing/selftests/bpf/bench_bpf_timing.h

Changes in bench_bpf_timing.h

08158c111d7d87d88269d9f873a2fc54b87bcb99 - selftests/bpf: Add BPF batch-timing library