Re: [LSF/MM TOPIC][LSF/MM ATTEND] NAPI polling for block drivers

2017-01-18 Thread Andrey Kuzmin
On Wed, Jan 18, 2017 at 5:27 PM, Sagi Grimberg wrote: > >> So what you say is you saw a consomed == 1 [1] most of the time? >> >> [1] from >> http://git.infradead.org/nvme.git/commitdiff/eed5a9d925c59e43980047059fde29e3aa0b7836 > > > Exactly. By processing 1 completion per interrupt it makes perfe

Re: [LSF/MM TOPIC][LSF/MM ATTEND] NAPI polling for block drivers

2017-01-18 Thread Andrey Kuzmin
On Wed, Jan 18, 2017 at 5:40 PM, Sagi Grimberg wrote: > >> Your report provided this stats with one-completion dominance for the >> single-threaded case. Does it also hold if you run multiple fio >> threads per core? > > > It's useless to run more threads on that core, it's already fully > utilize