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. Rosewill RS-MI-01: An Ultra Low-Cost Mini-ITX Chassis
  2. D-Link DCS-2330L HD Wireless Network Camera
  3. Gigabyte AM1M-S2H
  4. AMD's New Athlon/Semprons Give Old Phenom CPUs A Big Run For The Money
Latest Linux Articles
  1. AMD Catalyst 14.4 On Linux With Radeon R3 APU Graphics
  2. Red Hat Enterprise Linux 7.0 RC Benchmarks
  3. AMD Catalyst 14.4 Brings Few Linux Performance Improvements
  4. The Performance Of Fedora 20 Updated
Latest Linux News
  1. R600 Gallium3D Lands Many OpenGL Fixes
  2. LLVMpipe Gallium3D Now Exposes GLSL 3.30
  3. NGINX 1.6 Brings SPDY 3.1 & Other New Features
  4. Linux Foundation Announces A Core Infrastructure Initiative
  5. More Steam Linux Tests/Benchmarks Might Be Coming
  6. NVIDIA's Amazing Single-Board ARM Computer Might Be Delayed
  7. Fedora 21 To Get A Playground, New Features
  8. PC-BSD Is Developing Its Own Desktop Environment
  9. Valve Is Bringing VOGL To Windows & Working On Regression Tests
  10. Canonical Is Taking Over Linux 3.13 Kernel Maintenance
  11. Google Web Designer Is Now Natively Available On Linux
  12. Ubuntu 14.10 Is Codenamed The Utopic Unicorn
Latest Forum Discussions
  1. Linux Kernel Developers Fed Up With Ridiculous Bugs In Systemd
  2. HTPC-upgrade advice: AMD Richland A8-7600 or Kaveri A10-6700T ???
  3. What Else Would You Like To See On Phoronix This Spring?
  4. The GNOME Foundation Is Running Short On Money
  5. The Most Amazing OpenGL Tech Demo In 64kb
  6. Announcing radeontop, a tool for viewing the GPU usage
  7. New card. Open source drivers only.
  8. Script for Fan Speed Control