On Fri, Jan 3, 2020 at 5:29 PM Bart Van Assche <bvanassche@xxxxxxx> wrote: > > On 1/3/20 4:39 AM, Jinpu Wang wrote: > > Performance results for the v5.5-rc1 kernel are here: > > link: https://github.com/ionos-enterprise/ibnbd/tree/develop/performance/v5-v5.5-rc1 > > > > Some workloads RNBD are faster, some workloads NVMeoF are faster. > > Thank you for having shared these graphs. > > Do the graphs in RNBD-SinglePath.pdf show that NVMeOF achieves similar > or higher IOPS, higher bandwidth and lower latency than RNBD for > workloads with a block size of 4 KB and also for mixed workloads with > less than 20 disks, whether or not invalidation is enabled for RNBD? Hi Bart, Yes, that's the result on one pair of Server with Connect X4 HCA, I did another test on another 2 servers with Connect X5 HCA, results are quite different, we will double-check the performance results also on old machines, will share new results later. > > Is it already clear why NVMeOF performance drops if the number of disks > is above 25? Is that perhaps caused by contention on the block layer tag > allocator because multiple NVMe namespaces share a tag set? Can that > contention be avoided by increasing the NVMeOF queue depth further? No yet, will check. > > Thanks, > > Bart. > > Thanks
