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 Articles & Reviews
  1. Samsung 850 EVO SSD Linux Benchmarks
  2. Kubuntu 15.04 Is Turning Out Quite Nice, Good Way To Try Out The Latest KDE
  3. 5-Way Linux Distribution Comparison On The Core i3 NUC
  4. OCZ ARC 100 Linux SSD Benchmarks
  5. Lenovo ThinkPad X1 Carbon Works Great As A Linux Ultrabook
  6. Transcend SSD370 256GB
Latest Linux News
  1. Kdenlive Ported To Qt5/KF5, Coming To KDE Applications 15.04
  2. HTC & Valve Partnered Up For The Steam VR Headset
  3. 8cc: A Small C11 Compiler
  4. Not Everyone Likes The Possible "VULKAN" Name For Next-Gen OpenGL
  5. The Binary Blobs Making Up Coreboot
  6. Linux 4.0 & LLVM vs. GCC Yielded Much Interest This Month
  7. XBMC/Kodi 15.0 Alpha 1 Released
  8. Xfce 4.12 Released After Nearly Three Years Of Work
  9. The Khronos Group Filed A Trademark On "Vulkan" API
  10. Mozilla Thunderbird Adoption Climbs, Thunderbird 38 In May
Most Viewed News This Week
  1. Screenshots Of The GNOME 3.16 Changes
  2. More Proof That Allwinner Is Violating The GPL
  3. The Tremendous Features Of Fedora 22
  4. Krita 2.9 Released, Their Biggest Release Ever
  5. A Single UEFI Executable With The Linux Kernel, Initrd & Command Line
  6. Linux 4.0 Doesn't Have The Weirdest Codename
  7. Canonical Comes Up With Its Own FUSE Filesystem For Linux Containers
  8. Firefox 36 Brings Full HTTP/2 Support
%%CLICK_URL_UNESC%%