On 01/05/2018 02:44 PM, Michal Hocko wrote: > On Fri 05-01-18 09:22:22, Anshuman Khandual wrote: > [...] >> Hi Michal, >> >> After slightly modifying your test case (like fixing the page size for >> powerpc and just doing simple migration from node 0 to 8 instead of the >> interleaving), I tried to measure the migration speed with and without >> the patches on mainline. Its interesting.... >> >> 10000 pages | 100000 pages >> -------------------------- >> Mainline 165 ms 1674 ms >> Mainline + first patch (move_pages) 191 ms 1952 ms >> Mainline + all three patches 146 ms 1469 ms >> >> Though overall it gives performance improvement, some how it slows >> down migration after the first patch. Will look into this further. > > What are you measuring actually? All pages migrated to the same node?
The mount of time move_pages() system call took to move these many pages from node 0 to node 8. Yeah they migrated to the same node. > Do you have any profiles? How stable are the results? No, are you referring to perf record kind profile ? Results were repeating.
