On 3 May 2017 at 19:07, Dan van der Ster <dan@xxxxxxxxxxxxxx> wrote: > Whether cpu_dma_latency should be 0 or 1, I'm not sure yet. I assume > your 30% boost was when going from throughput-performance to > dma_latency=0, right? I'm trying to understand what is the incremental > improvement from 1 to 0. Probably minimal given that represents a state transition latency taking only 1us. Presumably the main issue is when the CPU can drop into the lower states and the compounding impact of that over time. I will do some simple characterisation of that over the next couple of weeks and report back... -- Cheers, ~Blairo _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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