A SNIA event
September 15-17, 2025

xNVMe and io_uring NVMe Passthrough – What does it Mean for the SPDK NVMe Driver?

Mon Sep 18 | 9:30am
Location:
Salon V
Abstract

Almost 10 years ago, the SPDK userspace polled mode nvme driver showed performance and efficiency far surpassing what was capable with the Linux kernel. But in recent years, Linux has responded with io_uring and asynchronous NVMe passthrough interfaces. The xNVMe project has also helped storage projects and applications adapt to the ever-growing list of Linux storage interfaces. This talk will compare the strengths of the SPDK and Linux NVMe drivers, explain how xNVMe has enabled io_uring NVMe passthrough in SPDK, and share some early performance results.

Learning Objectives

  • Differences between operating system and user space driven I/O
  • Obstables to achieving high performance with io_uring and io_uring command
  • Obstables to achieving high performance with user space drivers

Download the Presentation

---

Simon Lund
Samsung
Related Sessions
NVM Express
NVM Express State of the Union – 2023 NVMe® Annual Update

NVM Express® (NVMe®) technology has become synonymous with high-performance storage seeing widespread adoption in client, cloud and enterprise applications.

Favorites
NVM Express
libvfn: A Low-level NVMe Application and VFIO Driver Framework

This talk presents the design and implementation of libvfn, a new open-source library for interacting with PCIe-based NVMe devices from user-space using VFIO.

Klaus Jensen
Samsung Electronics
Favorites