On 03/11/2022 05:55 PM, David Hildenbrand wrote: > On 11.03.22 10:51, maobibo wrote: >> >> >> On 03/11/2022 05:20 PM, David Hildenbrand wrote: >>> On 11.03.22 10:01, Bibo Mao wrote: >>>> collapse huge page is slow, specially when khugepaged daemon runs >>>> on different numa node with that of huge page. It suffers from >>>> huge page copying across nodes, also cache is not used for target >>>> node. With this patch, khugepaged daemon switches to the same numa >>>> node with huge page. It saves copying time and makes use of local >>>> cache better. >>> >>> Hi, >>> >>> just the usual question, do you have any performance numbers to back >>> your claims (e.g., "is slow, specially when") and proof that this patch >>> does the trick? >> With specint 2006 on loongarch 3C5000L 32core numa system, it improves >> about 6%. The page size is 16K and pmd page size is 32M, memory performance >> across numa node is obvious different. However I do not test it on x86 box. >> > > Thanks, can you add these details to the patch description? Surely, will do in next patch. regards bibo, mao > >
