Re: [linus:master] [iov_iter] c9eec08bac: vm-scalability.throughput -16.9% regression

[David Howells]

Borislav Petkov <bp@xxxxxxxxx> wrote:

> Hmm, stupid question: are those results better than without that
> oneliner?

Without any changes, I see something like:

 iov_kunit_benchmark_bvec: avg 3185 uS, stddev 19 uS
 iov_kunit_benchmark_bvec: avg 3186 uS, stddev 9 uS
 iov_kunit_benchmark_bvec: avg 3244 uS, stddev 153 uS
 iov_kunit_benchmark_bvec_split: avg 3397 uS, stddev 16 uS
 iov_kunit_benchmark_bvec_split: avg 3400 uS, stddev 16 uS
 iov_kunit_benchmark_bvec_split: avg 3402 uS, stddev 34 uS
 iov_kunit_benchmark_kvec: avg 2818 uS, stddev 550 uS
 iov_kunit_benchmark_kvec: avg 2906 uS, stddev 21 uS
 iov_kunit_benchmark_kvec: avg 2923 uS, stddev 1496 uS
 iov_kunit_benchmark_xarray: avg 3564 uS, stddev 6 uS
 iov_kunit_benchmark_xarray: avg 3573 uS, stddev 17 uS
 iov_kunit_benchmark_xarray: avg 3575 uS, stddev 58 uS
 iov_kunit_benchmark_xarray_to_bvec: avg 3929 uS, stddev 9 uS
 iov_kunit_benchmark_xarray_to_bvec: avg 3930 uS, stddev 6 uS
 iov_kunit_benchmark_xarray_to_bvec: avg 3930 uS, stddev 7 uS

David