With traditional interrupt-driven I/O, the CPU is either doing something useful or waiting. With Storage Performance Development Kit (SPDK) polled I/O the CPU is always 100% busy so traditional profiling techniques don’t work. Intel® VTune™ Amplifier can identify “empty” spinning so you can balance core loading, balance SSDs, see the throughput per device, PCIe traffic breakdown and lots of good stuff. Learn how to use Intel VTune Amplifier to optimize your I/O performance.