[PATCH bpf-next 4/5] selftests/bpf: Add benchmark for bpf_csum_diff() helper

[Daniel Borkmann]

On 10/21/24 2:21 PM, Puranjay Mohan wrote:
> Add a microbenchmark for bpf_csum_diff() helper. This benchmark works by
> filling a 4KB buffer with random data and calculating the internet
> checksum on different parts of this buffer using bpf_csum_diff().
> 
> Example run using ./benchs/run_bench_csum_diff.sh on x86_64:
> 
> [bpf]$ ./benchs/run_bench_csum_diff.sh
> 4                    2.296 ± 0.066M/s (drops 0.000 ± 0.000M/s)
> 8                    2.320 ± 0.003M/s (drops 0.000 ± 0.000M/s)
> 16                   2.315 ± 0.001M/s (drops 0.000 ± 0.000M/s)
> 20                   2.318 ± 0.001M/s (drops 0.000 ± 0.000M/s)
> 32                   2.308 ± 0.003M/s (drops 0.000 ± 0.000M/s)
> 40                   2.300 ± 0.029M/s (drops 0.000 ± 0.000M/s)
> 64                   2.286 ± 0.001M/s (drops 0.000 ± 0.000M/s)
> 128                  2.250 ± 0.001M/s (drops 0.000 ± 0.000M/s)
> 256                  2.173 ± 0.001M/s (drops 0.000 ± 0.000M/s)
> 512                  2.023 ± 0.055M/s (drops 0.000 ± 0.000M/s)
> 
> Signed-off-by: Puranjay Mohan <puranjay at kernel.org>

Acked-by: Daniel Borkmann <daniel at iogearbox.net>