On Wed, May 3, 2017 at 10:52 AM, Blair Bethwaite <blair.bethwaite@xxxxxxxxx> wrote: > On 3 May 2017 at 18:38, Dan van der Ster <dan@xxxxxxxxxxxxxx> wrote: >> Seems to work for me, or? > > Yeah now that I read the code more I see it is opening and > manipulating /dev/cpu_dma_latency in response to that option, so the > TODO comment seems to be outdated. I verified tuned > latency-performance _is_ doing this properly on our RHEL7.3 nodes > (maybe I first tested this on 7.2 or just missed something then). In > any case, I think we're agreed that Ceph should recommend that > profile. latency-performance <-- yes 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. -- Dan _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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