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

The ~200 Line Linux Kernel Patch That Does Wonders

Michael Larabel

Published on 16 November 2010
Written by Michael Larabel
Page 2 of 2 - 224 Comments

Below is the video of the Linux desktop when running the Linux Git kernel and the patch in question was applied but the auto-group scheduler was disabled via its sysfs interface.

As you can see, the experience when compiling the Linux kernel with so many jobs is rather troubling to the Linux desktop experience. At no point in the video was the 1080p sample video paused, but that was just where the current mainline Linux kernel is at with 2.6.37. There was also some stuttering with glxgears and some responsiveness elsewhere. This is even with all of the Linux 2.6.37 kernel improvements up to today. If recording a video of an older kernel release, the experience is even more horrific! Now let's see what happens when enabling the patch's new scheduler code.

It is truly a night and day difference. The 1080p Ogg video now played smoothly a majority of the time when still compiling the Linux kernel with 64 jobs. Glxgears was also better and the window movements and desktop interactivity was far better. When compiling the Linux kernel with 128 jobs or other workloads that apply even greater strain, the results are even more dramatic, but it is not great for a video demonstration; the first video recorded under greater strained made the "before look" appear as like a still photograph.

This patch truly does wonders to the Linux kernel in improving the desktop responsiveness / interactivity. This patch with improving his web-browsing experience and more, impresses even Linus Torvalds. The merge window is now closed for the Linux 2.6.37 kernel, but this should be an exciting improvement that should be found in the Linux 2.6.38 kernel and at least keep the people happy waiting around for Reiser4 / Open-Source VIA Graphics / Radeon HD 6000 Series DRM to arrive in the mainline kernel.

In related work while waiting for your kernel to build, you may be interested in reading the recent five years of Linux kernel benchmarks and GCC vs. LLVM compiler benchmarks with GCC 4.2/4.3/4.4/4.5/4.6, LLVM-GCC, Clang on LLVM 2.8, and DragonEgg on LLVM 2.8 with GCC 4.5.1.

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. AMD R600g/RadeonSI Performance On Linux 3.16 With Mesa 10.3-devel
  2. Intel Pentium G3258 On Linux
  3. SilverStone Precision PS10
  4. ASRock Z97 Extreme6
Latest Linux Articles
  1. KVM Benchmarks On Ubuntu 14.10
  2. X.Org Server 1.16 Officially Released With Terrific Features
  3. Ubuntu With Linux 3.16 Smashes OS X 10.9.4 On The MacBook Air
  4. Preview: Benchmarking CentOS 7.0 & Scientific Linux 7.0
Latest Linux News
  1. Ubuntu 14.04.1 LTS Released
  2. Linux Developers Jump Quickly On ACPI 5.1, Helps Out ARM
  3. Pkg 1.3.0 Released To Improve Package Management On FreeBSD
  4. GOG.com Officially Starts Rolling Out Linux Games
  5. Fedora 21 Has Been Delayed By Three Weeks
  6. Mono Begins To Focus On Performance, Assembles A Team
  7. Oracle Linux 7 Released Today As Its RHEL7 Clone
  8. Unigine Develops City Traffic System, A Driving Simulator
  9. Intel 3.0 X.Org Driver Still Baking, New Development Release
  10. Eric Anholt Makes Progress With Broadcom VC4 Graphics Driver
Latest Forum Discussions
  1. AMD "Hawaii" Open-Source GPU Acceleration Still Not Working Right
  2. Updated and Optimized Ubuntu Free Graphics Drivers
  3. Radeon related kernel bug??
  4. how the US intellegentia operates:
  5. AMD Publishes Open-Source Linux HSA Kernel Driver
  6. Next-Gen OpenGL To Be Announced Next Month
  7. Open-Source Radeon Performance Boosted By Linux 3.16
  8. Remote gui not accessible in Phoronix Test Suite 5.2