On Tue, Dec 08, 2020 at 12:49:36PM +0100, Sebastian Andrzej Siewior wrote: > On 2020-12-08 12:36:53 [+0100], Daniel Wagner wrote: > > Obvious in this configuration there are no remote completions (verified > > it). > > do you complete on a remote CPU if you limit the queues to one (this is > untested of course)? nvme0n1/ completed 11913011 remote 6718563 56.40% yes, but how is this relevant? I thought Jens complain was about the additional indirection via the softirq context - rq->q->mq_ops->complete(rq); + blk_mq_trigger_softirq(rq); and not the remote completion path. I can benchmark it out but I don't know if it's really helping in the discussion.
