1. Computers
  2. Display Drivers
  3. Graphics Cards
  4. Memory
  5. Motherboards
  6. Processors
  7. Software
  8. Storage
  9. Operating Systems


Facebook RSS Twitter Twitter Google Plus


Phoronix Test Suite

OpenBenchmarking.org

An In-Kernel Virtio Block Device Accelerator For Linux

Linux Kernel

Published on 02 December 2012 05:42 AM EST
Written by Michael Larabel in Linux Kernel
2 Comments

For the past several months there has been work on vhost-blk, an in-kernel virito-blk device accelerator. This kernel-based accelerator can provide measurable speed-ups for disk/block device access by virtualized guest machines.

From the latest vhost-blk patch: "Due to lack of proper in-kernel AIO interface, this version converts guest's I/O request to bio and use submit_bio() to submit I/O directly. So this version any supports raw block device as guest's disk image, e.g. /dev/sda, /dev/ram0. We can add file based image support to vhost-blk once we have in-kernel AIO interface."

In terms of handling an in-kernel AIO interface, there's also patches floating around.

The original vhost-blk support patch, which amounts to a few hundred lines of new code in the Linux kernel, amounted to 5~15% performance improvements compared to the user-space virtio-blk implementation. Performance results on the latest vhost-blk v6 patch indicate performance improvements from +13~108% on a Fusion I/O device or up to a 216% performance improvement when dealing with a Ramdisk device.

It's possible we could see vhost-blk support merged into the Linux 3.8 kernel.

About The Author
Michael Larabel is the principal author of Phoronix.com and founded the web-site in 2004 with a focus on enriching the Linux hardware experience and being the largest web-site devoted to Linux hardware reviews, particularly for products relevant to Linux gamers and enthusiasts but also commonly reviewing servers/workstations and embedded Linux devices. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics hardware drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated testing software. He can be followed via and or contacted via .
Latest Linux Hardware Reviews
  1. ASRock X99 Extreme3 Is An Affordable Choice For Linux Users
  2. A Walkthrough Of The New 32 System Open-Source Linux Benchmarking Test Farm
  3. Habey MITX-6771: Mini-ITX Board With Quad-Core J1900 Bay Trail
  4. OCZ Vector 150 SSD On Linux
Latest Linux Articles
  1. 17-Way Linux Graphics Card Comparison With Civilization Beyond Earth
  2. AMD Kaveri: Open-Source Radeon Gallium3D vs. Catalyst 14.12 Omega Driver
  3. 12-Way AMD Catalyst 14.12 vs. NVIDIA 346 Series Linux GPU Comparison
  4. AMD Catalyst 14.12 Omega Driver Brings Mixed Results For Linux Users
Latest Linux News
  1. Live Patching Support Planned For Linux 3.20/4.0 Kernel
  2. Features Of The Linux 3.19 Kernel: Graphics & Disks Rule
  3. Orange Pi Is The Latest Raspberry Pi Inspired ARM Board
  4. An Open-Source Hardware Ambient Light Sensor Is Brought Up
  5. Heterogeneous Memory Management Is Coming Along For The Linux Kernel
  6. NTP Is The Latest Project Struck By Security Issues
  7. LDC 0.15.1 Released For A D Compiler In LLVM
  8. Fedora Doesn't Yet Enable F2FS File-System Support
  9. XZ 5.2 Adds New Multi-Threaded Options
  10. Intel 2.99.917 X.Org Driver Released, 3.0 Release Finally Near
Latest Forum Discussions
  1. Looking for an nVidia GPU, but not sure how well they are supported.
  2. No OpenCL with latest driver updates on Ubuntu?
  3. Need some hand holding with upgrading xserver
  4. Maker3D - create your 3D RPG
  5. FPS capped on Linux (AMD fglrx drivers)
  6. Speeding up systemd networking service
  7. Major Performance Breakthrough Discovered For Intel's Mesa Driver
  8. Are there an app using HSA ?