Hou Tao 9c42652f8b selftests/bpf: Add benchmark for bpf_strncmp() helper ... Add benchmark to compare the performance between home-made strncmp() in bpf program and bpf_strncmp() helper. In summary, the performance win of bpf_strncmp() under x86-64 is greater than 18% when the compared string length is greater than 64, and is 179% when the length is 4095. Under arm64 the performance win is even bigger: 33% when the length is greater than 64 and 600% when the length is 4095. The following is the details: no-helper-X: use home-made strncmp() to compare X-sized string helper-Y: use bpf_strncmp() to compare Y-sized string Under x86-64: no-helper-1 3.504 ± 0.000M/s (drops 0.000 ± 0.000M/s) helper-1 3.347 ± 0.001M/s (drops 0.000 ± 0.000M/s) no-helper-8 3.357 ± 0.001M/s (drops 0.000 ± 0.000M/s) helper-8 3.307 ± 0.001M/s (drops 0.000 ± 0.000M/s) no-helper-32 3.064 ± 0.000M/s (drops 0.000 ± 0.000M/s) helper-32 3.253 ± 0.001M/s (drops 0.000 ± 0.000M/s) no-helper-64 2.563 ± 0.001M/s (drops 0.000 ± 0.000M/s) helper-64 3.040 ± 0.001M/s (drops 0.000 ± 0.000M/s) no-helper-128 1.975 ± 0.000M/s (drops 0.000 ± 0.000M/s) helper-128 2.641 ± 0.000M/s (drops 0.000 ± 0.000M/s) no-helper-512 0.759 ± 0.000M/s (drops 0.000 ± 0.000M/s) helper-512 1.574 ± 0.000M/s (drops 0.000 ± 0.000M/s) no-helper-2048 0.329 ± 0.000M/s (drops 0.000 ± 0.000M/s) helper-2048 0.602 ± 0.000M/s (drops 0.000 ± 0.000M/s) no-helper-4095 0.117 ± 0.000M/s (drops 0.000 ± 0.000M/s) helper-4095 0.327 ± 0.000M/s (drops 0.000 ± 0.000M/s) Under arm64: no-helper-1 2.806 ± 0.004M/s (drops 0.000 ± 0.000M/s) helper-1 2.819 ± 0.002M/s (drops 0.000 ± 0.000M/s) no-helper-8 2.797 ± 0.109M/s (drops 0.000 ± 0.000M/s) helper-8 2.786 ± 0.025M/s (drops 0.000 ± 0.000M/s) no-helper-32 2.399 ± 0.011M/s (drops 0.000 ± 0.000M/s) helper-32 2.703 ± 0.002M/s (drops 0.000 ± 0.000M/s) no-helper-64 2.020 ± 0.015M/s (drops 0.000 ± 0.000M/s) helper-64 2.702 ± 0.073M/s (drops 0.000 ± 0.000M/s) no-helper-128 1.604 ± 0.001M/s (drops 0.000 ± 0.000M/s) helper-128 2.516 ± 0.002M/s (drops 0.000 ± 0.000M/s) no-helper-512 0.699 ± 0.000M/s (drops 0.000 ± 0.000M/s) helper-512 2.106 ± 0.003M/s (drops 0.000 ± 0.000M/s) no-helper-2048 0.215 ± 0.000M/s (drops 0.000 ± 0.000M/s) helper-2048 1.223 ± 0.003M/s (drops 0.000 ± 0.000M/s) no-helper-4095 0.112 ± 0.000M/s (drops 0.000 ± 0.000M/s) helper-4095 0.796 ± 0.000M/s (drops 0.000 ± 0.000M/s) Signed-off-by: Hou Tao <houtao1@huawei.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20211210141652.877186-4-houtao1@huawei.com		2021-12-11 17:40:23 -08:00
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bench_bloom_filter_map.c	selftests/bpf: Fix a tautological-constant-out-of-range-compare compiler warning	2021-11-12 14:11:46 -08:00
bench_bpf_loop.c	selftest/bpf/benchs: Add bpf_loop benchmark	2021-11-30 10:56:28 -08:00
bench_count.c	selftests/bpf: Fix checkpatch error on empty function parameter	2021-12-11 17:40:23 -08:00
bench_rename.c	selftests/bpf: Fix checkpatch error on empty function parameter	2021-12-11 17:40:23 -08:00
bench_ringbufs.c	selftests/bpf: Fix checkpatch error on empty function parameter	2021-12-11 17:40:23 -08:00
bench_strncmp.c	selftests/bpf: Add benchmark for bpf_strncmp() helper	2021-12-11 17:40:23 -08:00
bench_trigger.c	selftests/bpf: Fix checkpatch error on empty function parameter	2021-12-11 17:40:23 -08:00
run_bench_bloom_filter_map.sh	bpf/benchs: Add benchmarks for comparing hashmap lookups w/ vs. w/out bloom filter	2021-10-28 13:22:49 -07:00
run_bench_bpf_loop.sh	selftest/bpf/benchs: Add bpf_loop benchmark	2021-11-30 10:56:28 -08:00
run_bench_rename.sh
run_bench_ringbufs.sh	bpf/benchs: Add benchmark tests for bloom filter throughput + false positive	2021-10-28 13:22:49 -07:00
run_bench_strncmp.sh	selftests/bpf: Add benchmark for bpf_strncmp() helper	2021-12-11 17:40:23 -08:00
run_bench_trigger.sh	selftest/bpf: Add BPF triggering benchmark	2020-05-13 12:19:38 -07:00
run_common.sh	selftest/bpf/benchs: Add bpf_loop benchmark	2021-11-30 10:56:28 -08:00