Hi, I'm not sure it's related to this bug http://tracker.ceph.com/issues/9513 But, when with this fio-rbd benchmark [global] ioengine=rbd clientname=admin pool=test rbdname=test invalidate=0 rw=randread bs=4k direct=1 numjobs=8 group_reporting=1 size=10G [rbd_iodepth32] iodepth=32 I have around 40000iops (cpu bound on client) with rbd_cache=false vs 13000iops (40%cpu usage on client) with rbd_cache=true (Note that it should be direct ios, so It should bypass the cache). Seem to be a lock or something like that, as the cpu usage is a lot lower too. Is it the expected behavior ? -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
