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? -- Thanks, David / dhildenb
