Scalability issue with multiple NVMe Devices with one core

Keith Busch keith.busch at
Thu Oct 13 07:18:21 PDT 2016

On Thu, Oct 13, 2016 at 08:44:37AM +0300, Roy Shterman wrote:
> scenario is when running traffic over 1 NVMe Device with 1 core I'm getting
> X IOPS and Y% core utilization.
> In my perception, when adding more NVMe Devices I should see some linearity
> of the above results, but I'm getting only a small improvement in IOPS and
> still not getting 100% (or closer ) in CPU utilization.
> Any suggestions?

How are you generating IO?

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