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

Linux I/O Scheduler Comparison On The Linux 3.4 Desktop

Michael Larabel

Published on 11 May 2012
Written by Michael Larabel
Page 1 of 4 - 28 Comments

At the request of Phoronix readers, and that the default I/O scheduler may change, here's a comparison of the CFQ, Deadline, and Noop schedulers on three systems and covering both rotating media (HDD) and solid-state storage (SSDs).

The hardware used for the comparison was an Intel Core 2 Duo T9300 laptop with a 100GB Hitachi HTS72201 SATA HDD, an Intel Core i5 2520M Sandy Bridge system with a 160GB Intel SSD, and an Intel Core i7 720QM Clarksfield notebook also with an Intel 160GB X-25 SSD. This article is primarily about publishing Linux desktop scheduler results while, hardware permitting, in another article will be workstation/server scheduler results.

All three systems were running Ubuntu 12.04 (x86_64) and formatted to EXT4 while the Linux kernel was upgraded to a Linux 3.4 kernel development snapshot.

CFQ, the Completely Fair Queuing scheduler, is the default scheduler for the mainline Linux kernel is what most distributions honor as the default.

The Noop scheduler is the simplest scheduler and based upon a FIFO model.

The Deadline scheduler attempts to guarantee the service start time of I/O requests.

The possible change coming up would be to move the default from CFQ to Deadline for modern, speedy solid-state drives (e.g. PCI Express-based SSDs).

A variety of disk centric workloads were run via the Phoronix Test Suite to gauge the three systems' performance with the CFQ / Deadline / Noop schedulers on Linux 3.4.

<< Previous Page
1
Latest Linux Hardware Reviews
  1. Even With Re-Clocking, Nouveau Remains Behind NVIDIA's Proprietary Linux Driver
  2. The Power Consumption & Efficiency Of Open-Source GPU Drivers
  3. AMD R600g/RadeonSI Performance On Linux 3.16 With Mesa 10.3-devel
  4. Intel Pentium G3258 On Linux
Latest Linux Articles
  1. Updated Source Engine Benchmarks On The Latest AMD/NVIDIA Linux Drivers
  2. Nouveau vs. Radeon vs. Intel Tests On Linux 3.16, Mesa 10.3-devel
  3. KVM Benchmarks On Ubuntu 14.10
  4. X.Org Server 1.16 Officially Released With Terrific Features
Latest Linux News
  1. GStreamer VA-API Plug-In Update Adds New Features
  2. Qt 5.4 Going Into Feature Freeze Next Week With Exciting Changes
  3. OpenSUSE Factory Turns Into Rolling Release Distribution
  4. "The World's Most Highly-Assured OS" Kernel Open-Sourced
  5. NVIDIA Is Working Towards VDPAU H.265/HEVC Support
  6. Hawaii Bug-Fixes Start Hitting Mainline RadeonSI Gallium3D
  7. The FFmpeg vs. Libav War Continues In Debian Land
  8. Grand Theft Auto Running On Direct3D Natively On Linux Shows Gallium3D Potential
  9. GCC As A Just-In Time Compiler Is An Interesting Project
  10. Age Of Wonders III Is Still Being Ported To Linux
Latest Forum Discussions
  1. AMD Athlon 5350 APU On Linux
  2. Updated and Optimized Ubuntu Free Graphics Drivers
  3. Linus Torvalds On GCC 4.9: Pure & Utter Crap
  4. Debian + radeonsi
  5. Open-source drivers on ATI R7 260X
  6. List of Linux friendly Kickstarter projects
  7. Porting Mesa to the Playstation 2
  8. ASRock AM1H-ITX: One Of The Best AM1 Mini-ITX Motherboards