Cross-platform libraries and tools for NVMe devices¶
xNVMe provides the means to program and interact with NVMe devices from user space.
The foundation of xNVMe is
libxnvme, a user space library for working
with NVMe devices. It provides a C API for memory management, that is, for
allocating physical / DMA transferable memory when needed. An NVMe command
interface allowing you to submit and complete NVMe commands in a synchronous as
well as an asynchronous manner.
Convenience functions are built-in for common operations and retrieving parameters essential for I/O applications. Such as your maximum data transfer size and introducing the concept of a device geometry.
The foundation is as such fairly low-level, sitting right on top of a NVMe
driver. The actual NVMe driver being used by
libxnvme is re-targetable and
can be any one of the GNU/Linux Kernel NVMe driver via
io_uring, the SPDK NVMe driver, or your own custom NVMe driver.
libxnvme provides a unifying
C API for NVMe tool builders,
application developers, and for anyone wanting their host-defined software to
run on more than a single platform.
On top of
libxnvme a suite of tools and libraries are provided, that is, a
command-line interface for managing your NVMe device named
lblk for commands specific to NVM Namespaces.
For the Zoned Command Set a command-line interface designed specifically for
convenient management of Zoned NVMe devices named
zoned and a C API
To evaluate the performance of abstractions introduced by
xNVMe a Fio IO
engine is provided, supporting conventional NVMe devices, as well as
- Getting Started
- C API
- C API: Examples