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lSY6eKzHgfkHOdVFvj//5kUqClYTLYTETyUeY8fAoNkS83LWp/u4SZqrYVyL8tZwLRrwnz+0yVM2qZpeS0BbGik0H5M8aLwG+b+opXPeYBJvGAZ1nS4K2dCmq2NAKpTsjnk8Ut0aX9l27hKrm5LaW1rC08g43cXmPaEwi2owxkYKhKQzDs5cpN8GwI7rCEOwT8eCD+PhAvlP+x1EIWYxjj865PhEtRkRg8PAFlBsqY6EN2rUfEwhGLL+djkioeqiBrso9GkXFsqrIMK0QLju17A/FzWEbkv/YGezfY0U1o/fz+XiOEP+xzmkaQhuzEcAUfwYmyUGlON44HAwjDj8PI83V6gsbAz4LLTvqMhuve2jx0cAU7ABwx+mlTg== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 12/21/2023 8:58 AM, Yin Fengwei wrote: > But what I am not sure was whether it's worthy to do such kind of change > as the regression only is seen obviously in micro-benchmark. No evidence > showed the other regressionsin this report is related with madvise. At > least from the perf statstics. Need to check more on stream/ramspeed. > Thanks. With debugging patch (filter out the stack mapping from THP aligned), the result of stream can be restored to around 2%: commit: 30749e6fbb3d391a7939ac347e9612afe8c26e94 1111d46b5cbad57486e7a3fab75888accac2f072 89f60532d82b9ecd39303a74589f76e4758f176f -> 1111d46b5cbad with debugging patch 30749e6fbb3d391a 1111d46b5cbad57486e7a3fab75 89f60532d82b9ecd39303a74589 ---------------- --------------------------- --------------------------- 350993 -15.6% 296081 ± 2% -1.5% 345689 stream.add_bandwidth_MBps 349830 -16.1% 293492 ± 2% -2.3% 341860 ± 2% stream.add_bandwidth_MBps_harmonicMean 333973 -20.5% 265439 ± 3% -1.7% 328403 stream.copy_bandwidth_MBps 332930 -21.7% 260548 ± 3% -2.5% 324711 ± 2% stream.copy_bandwidth_MBps_harmonicMean 302788 -16.2% 253817 ± 2% -1.4% 298421 stream.scale_bandwidth_MBps 302157 -17.1% 250577 ± 2% -2.0% 296054 stream.scale_bandwidth_MBps_harmonicMean 339047 -12.1% 298061 -1.4% 334206 stream.triad_bandwidth_MBps 338186 -12.4% 296218 -2.0% 331469 stream.triad_bandwidth_MBps_harmonicMean The regression of ramspeed is still there. Regards Yin, Fengwei