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Aug 2024 03:02:42 +0000 Message-ID: Date: Wed, 14 Aug 2024 11:02:31 +0800 User-Agent: Mozilla Thunderbird Subject: Re: [linus:master] [mm] c0bff412e6: stress-ng.clone.ops_per_sec -2.9% regression To: Mateusz Guzik CC: David Hildenbrand , kernel test robot , Peter Xu , , , , Andrew Morton , Huacai Chen , Jason Gunthorpe , Matthew Wilcox , Nathan Chancellor , Ryan Roberts , WANG Xuerui , , , References: <202407301049.5051dc19-oliver.sang@intel.com> <193e302c-4401-4756-a552-9f1e07ecedcf@redhat.com> <439265d8-e71e-41db-8a46-55366fdd334e@intel.com> <90477952-fde2-41d7-8ff4-2102c45e341d@redhat.com> <6uxnuf2gysgabyai2r77xrqegb7t7cc2dlzjz6upwsgwrnfk3x@cjj6on3wqm4x> <5a67c103-1d9d-440d-8bed-bbfa7d3ecf71@redhat.com> <5c0979a2-9a56-4284-82d2-42da62bda4a5@redhat.com> <817150f2-abf7-430f-9973-540bd6cdd26f@intel.com> Content-Language: en-US From: Yin Fengwei In-Reply-To: Content-Type: text/plain; charset="UTF-8"; format=flowed Content-Transfer-Encoding: 7bit X-ClientProxiedBy: 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 YVszQhwF 75ZumrM731emNUVooDfpvaEF0FFVAU2Q9vEpouq2TZuZh4kVW4HJ//4rqiEMmThTzOELEegMY4k2tmf3bE/T5lvZMA2ppnfqLf++++o/IBYJtqLvFMmbiqkfjDzZg8L+bE1joPq/1/jjuCK2sAvl1G9lmCgv/Ff/9hH+S/coj0Q25RIaTdeXidP5MIPhahdxsCA6vdQPJRVTc4dAhEb2GO1o3QDIvruddOkbAbjXzpK8hLDTv3xvJCR4r68Eux9iVUgoB/V4vh3YZ1gro6+WdxqGhvrG2CNDv/MiWEJtj8jTUxweFEsk0bjO3XQdawjdaVgHQtwaOtJsfKa4lvw/FyOPvVEqRVuYgap+/wK7cXN8srLUGeQZ1oFZ0tkPIB1UQA79wcoq2ubcafTOwa2YuR5nh1LBwKdwZ5gQbthiCn0DvEMoe6y29I7hcFZQHrqkncaVw10I2jBt0XsQJ6I/GvPSeCG4EpNYcWTIWWSCbITLU75Y= 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 8/13/24 03:14, Mateusz Guzik wrote: > thanks for testing > > would you mind benchmarking the change which merely force-inlines _compund_page? > > https://lore.kernel.org/linux-mm/66c4fcc5-47f6-438c-a73a-3af6e19c3200@redhat.com/ This change can resolve the regression also: ========================================================================================= tbox_group/testcase/rootfs/kconfig/compiler/nr_threads/testtime/test/cpufreq_governor/debug-setup: lkp-icl-2sp8/stress-ng/debian-12-x86_64-20240206.cgz/x86_64-rhel-8.3/gcc-12/100%/60s/clone/performance/yfw_test2 commit: 9cb28da54643ad464c47585cd5866c30b0218e67 parent commit c0bff412e67b781d761e330ff9578aa9ed2be79e commit introduced regression 450b96d2c4f740152e03c6b79b484a10347b3ea9 the change proposed by David in above link 9cb28da54643ad46 c0bff412e67b781d761e330ff95 450b96d2c4f740152e03c6b79b4 ---------------- --------------------------- --------------------------- %stddev %change %stddev %change %stddev \ | \ | \ 2906 +3.5% 3007 +0.4% 2919 stress-ng.clone.microsecs_per_clone 562884 -2.9% 546575 -0.6% 559718 stress-ng.clone.ops 9295 -2.9% 9028 -0.5% 9248 stress-ng.clone.ops_per_sec Regards Yin, Fengwei