WARNING: Use of volatile is usually wrong: see Documentation/process/volatile-considered-harmful.rst
#78: FILE: tools/testing/selftests/bpf/bench_bpf_timing.h:23:
+	volatile __u32 *timing_enabled;		/* &skel->bss->timing_enabled */

WARNING: Use of volatile is usually wrong: see Documentation/process/volatile-considered-harmful.rst
#79: FILE: tools/testing/selftests/bpf/bench_bpf_timing.h:24:
+	volatile __u32 *batch_iters_bss;	/* &skel->bss->batch_iters */

WARNING: line length of 81 exceeds 80 columns
#101: FILE: tools/testing/selftests/bpf/bench_bpf_timing.h:46:
+void bpf_bench_timing_measure(struct bpf_bench_timing *t, struct bench_res *res);

WARNING: line length of 93 exceeds 80 columns
#102: FILE: tools/testing/selftests/bpf/bench_bpf_timing.h:47:
+void bpf_bench_timing_report(struct bpf_bench_timing *t, const char *name, const char *desc);

WARNING: line length of 89 exceeds 80 columns
#103: FILE: tools/testing/selftests/bpf/bench_bpf_timing.h:48:
+void bpf_bench_calibrate(struct bpf_bench_timing *t, bpf_bench_run_fn run_fn, void *ctx);

WARNING: line length of 87 exceeds 80 columns
#236: FILE: tools/testing/selftests/bpf/benchs/bench_bpf_timing.c:125:
+	if (total_samples >= (__u32)env.producer_cnt * t->target_samples && !t->done) {

WARNING: line length of 99 exceeds 80 columns
#243: FILE: tools/testing/selftests/bpf/benchs/bench_bpf_timing.c:132:
+void bpf_bench_timing_report(struct bpf_bench_timing *t, const char *name, const char *description)

WARNING: line length of 96 exceeds 80 columns
#267: FILE: tools/testing/selftests/bpf/benchs/bench_bpf_timing.c:156:
+		printf("RESULT scenario=%s samples=%d median=%.2f stddev=%.2f cv=%.2f min=%.2f "

WARNING: quoted string split across lines
#268: FILE: tools/testing/selftests/bpf/benchs/bench_bpf_timing.c:157:
+		printf("RESULT scenario=%s samples=%d median=%.2f stddev=%.2f cv=%.2f min=%.2f "
+		       "p99=%.2f max=%.2f\n", name, total, s.median, s.stddev,

WARNING: line length of 90 exceeds 80 columns
#269: FILE: tools/testing/selftests/bpf/benchs/bench_bpf_timing.c:158:
+		       s.mean > 0 ? s.stddev / s.mean * 100.0 : 0.0, s.min, s.p99, s.max);

WARNING: line length of 91 exceeds 80 columns
#271: FILE: tools/testing/selftests/bpf/benchs/bench_bpf_timing.c:160:
+		printf("%s: median %.2f ns/op, stddev %.2f, p99 %.2f (%d samples)\n", name,

WARNING: line length of 96 exceeds 80 columns
#292: FILE: tools/testing/selftests/bpf/benchs/bench_bpf_timing.c:181:
+static __u64 measure_elapsed(struct bpf_bench_timing *t, bpf_bench_run_fn run_fn, void *run_ctx,

WARNING: line length of 92 exceeds 80 columns
#349: FILE: tools/testing/selftests/bpf/benchs/bench_bpf_timing.c:238:
+void bpf_bench_calibrate(struct bpf_bench_timing *t, bpf_bench_run_fn run_fn, void *run_ctx)

WARNING: line length of 92 exceeds 80 columns
#355: FILE: tools/testing/selftests/bpf/benchs/bench_bpf_timing.c:244:
+	elapsed = measure_elapsed(t, run_fn, run_ctx, CALIBRATE_SEED_BATCH, CALIBRATE_RUNS);

WARNING: line length of 83 exceeds 80 columns
#357: FILE: tools/testing/selftests/bpf/benchs/bench_bpf_timing.c:246:
+		fprintf(stderr, "calibration: no timing samples, using default\n");

WARNING: line length of 85 exceeds 80 columns
#367: FILE: tools/testing/selftests/bpf/benchs/bench_bpf_timing.c:256:
+	time_n = measure_elapsed(t, run_fn, run_ctx, t->batch_iters, CALIBRATE_RUNS);

WARNING: line length of 90 exceeds 80 columns
#368: FILE: tools/testing/selftests/bpf/benchs/bench_bpf_timing.c:257:
+	time_2n = measure_elapsed(t, run_fn, run_ctx, t->batch_iters * 2, CALIBRATE_RUNS);

WARNING: quoted string split across lines
#376: FILE: tools/testing/selftests/bpf/benchs/bench_bpf_timing.c:265:
+				"WARNING: proportionality check failed (2N/N ratio=%.3f, "
+				"expected=2.000, error=%.1f%%)\n  System noise may be affecting "

WARNING: quoted string split across lines
#377: FILE: tools/testing/selftests/bpf/benchs/bench_bpf_timing.c:266:
+				"expected=2.000, error=%.1f%%)\n  System noise may be affecting "
+				"results.\n",

WARNING: Use of volatile is usually wrong: see Documentation/process/volatile-considered-harmful.rst
#412: FILE: tools/testing/selftests/bpf/progs/bench_bpf_timing.bpf.h:23:
+volatile __u32 batch_iters;

WARNING: Use of volatile is usually wrong: see Documentation/process/volatile-considered-harmful.rst
#413: FILE: tools/testing/selftests/bpf/progs/bench_bpf_timing.bpf.h:24:
+volatile __u32 timing_enabled;

total: 0 errors, 21 warnings, 0 checks, 405 lines checked

NOTE: For some of the reported defects, checkpatch may be able to
      mechanically convert to the typical style using --fix or --fix-inplace.

Commit a499708d368c ("selftests/bpf: Add BPF batch-timing library") has style problems, please review.

NOTE: Ignored message types: ALLOC_SIZEOF_STRUCT BAD_REPORTED_BY_LINK CAMELCASE COMMIT_LOG_LONG_LINE FILE_PATH_CHANGES GIT_COMMIT_ID MACRO_ARG_REUSE NO_AUTHOR_SIGN_OFF

NOTE: If any of the errors are false positives, please report
      them to the maintainer, see CHECKPATCH in MAINTAINERS.
total: 0 errors, 21 warnings, 0 checks, 405 lines checked