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. Intel Xeon E5-1680 v3 & E5-2687W v3 Compared To The Core i7 5960X On Linux
  2. Intel 120GB 530 Series SSD Linux Performance
  3. Btrfs/EXT4/XFS/F2FS RAID 0/1/5/6/10 Linux Benchmarks On Four SSDs
  4. AMD's Windows Catalyst Driver Remains Largely Faster Than Linux Drivers
Latest Linux Articles
  1. Apple OS X 10.10 vs. Ubuntu 14.10 Performance
  2. Mesa 10.5-devel Brings Some Intel Haswell HD Graphics Changes Over Mesa 10.3
  3. NVIDIA vs. Nouveau Drivers With Linux 3.18 + Mesa 10.4-devel
  4. Is The Open-Source NVIDIA Driver Fast Enough For Steam On Linux Gaming?
Latest Linux News
  1. Meizu's Ubuntu Phone Not Expected Until Early Next Year
  2. DragonFlyBSD 4.0 Drops i386 Support, Improves Graphics
  3. Expensive "Free/Libre Software Laptop" Uses A NVIDIA GPU
  4. QEMU 2.2-rc3 Released, Final Release Pushed Back By Couple Days
  5. 64-bit ARM FreeBSD Support Is Taking Shape
  6. GCW Zero Starts Seeing New Game Releases
  7. Intel's Cherry Trail Delayed To Next Year
  8. Bq Introduces More Android Devices, But Still No Ubuntu Phones
  9. Qt 5.4 Release Candidate Expected Later This Week
  10. ArrayFire Accelerated Compute Library Open-Sourced
Latest Forum Discussions
  1. Updated and Optimized Ubuntu Free Graphics Drivers
  2. Hurrican SDL Port
  3. Roadmap to Catalyst 14.10 ?
  4. how to configure module phoromatic ?
  5. PulseAudio 6.0 Is Coming & Other Linux Audio Plans For The Future
  6. Debian Developer Resigns From The Systemd Maintainership Team
  7. Cant get working Kaveri APU - A10-7850k
  8. Script for Fan Speed Control