Messages in this thread | | | Date | Mon, 2 Nov 2020 11:02:47 +0100 | From | Michal Hocko <> | Subject | Re: [LKP] Re: [mm/memcg] bd0b230fe1: will-it-scale.per_process_ops -22.7% regression |
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On Mon 02-11-20 17:53:14, Rong Chen wrote: > > > On 11/2/20 5:27 PM, Michal Hocko wrote: > > On Mon 02-11-20 17:15:43, kernel test robot wrote: > > > Greeting, > > > > > > FYI, we noticed a -22.7% regression of will-it-scale.per_process_ops due to commit: > > > > > > > > > commit: bd0b230fe14554bfffbae54e19038716f96f5a41 ("mm/memcg: unify swap and memsw page counters") > > > https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master > > I really fail to see how this can be anything else than a data structure > > layout change. There is one counter less. > > > > btw. are cgroups configured at all? What would be the configuration? > > Hi Michal, > > We used the default configure of cgroups, not sure what configuration you > want, > could you give me more details? and here is the cgroup info of will-it-scale > process: > > $ cat /proc/3042/cgroup > 12:hugetlb:/ > 11:memory:/system.slice/lkp-bootstrap.service
OK, this means that memory controler is enabled and in use. Btw. do you get the original performance if you add one phony page_counter after the union? -- Michal Hocko SUSE Labs
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