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 Zswap Still Aiming For Compressed Swap Caching

Linux Kernel

Published on 09 January 2013 02:23 PM EST
Written by Michael Larabel in Linux Kernel
6 Comments

A second version of the Zswap patch-set for the Linux kernel was published this week. The Zswap patches provide compressed swap caching support to compress pages in the process of being swapped and compresses them into a dynamically allocated RAM-backed memory pool.

Zswap attempts to avoid writing back to the swap device in order to reduce I/O and yielding greater performance in scenarios where swapping does take place. When building the Linux kernel under heavy memory pressure, it's been reported by the lead Zswap developer that using the new technology can lead to a runtime reduction of 53% and an I/O reduction by nearly 80%.

The lead use-cases for Linux Zswap are systems with limited amounts of system memory, virtualization where VM guests are sharing common I/O resources, and systems backed by solid-state drives where reducing the number of writes to the disk can increase the SSD's life-span.

In Zswap v2, the set of nine patches have been re-based to the latest Linux "-next" kernel and there's various technical fixes to the code.

More information on the latest state of Zswap is available from this kernel mailing list post for the newest patches. Zswap is a possible candidate for merging into the Linux 3.9 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. Ubuntu 15.04 Is The Easy Path To Better Performance On Intel Broadwell
  2. NVIDIA's Latest Maxwell Line-Up Against AMD With Catalyst On Linux
  3. Preliminary Tests Of Intel Sandy Bridge & Ivy Bridge vs. Broadwell
  4. AMD FX-8320E Performance On Linux
  5. Linux Compiler Benchmarks Of LLVM Clang 3.5 vs. LLVM Clang 3.6-rc1
  6. Intel Broadwell HD Graphics 5500: Windows 8.1 vs. Linux
Latest Linux News
  1. Atomic Mode-Setting/Display Support Progresses In Linux 3.20
  2. NVIDIA 340.76 Brings Three Stable Fixes
  3. Intel Broadwell-U P-State vs. ACPI CPUFreq Scaling Linux Performance
  4. DragonFlyBSD Is Almost To Linux 3.10 Era Intel Graphics Support
  5. New Beta Of Witcher 2 Aims For Greater Performance
  6. NVIDIA Tegra DRM Driver Supports Atomic Mode-Setting In Linux 3.20
  7. Linux "GHOST" Vulnerability Hits Glibc Systems
  8. Linux Game Publishing Remains Offline, Three Years After The CEO Shakeup
  9. PlayStation 4 System Compiler Support Landing In LLVM
  10. Now-Closed KDE Vulnerabilities Remind Us X11 Screen Locks / Screensavers Are Insecure
Most Viewed News This Week
  1. Windows 10 To Be A Free Upgrade: What Linux Users Need To Know
  2. LibreOffice 4.4 Is Coming Soon With New Features
  3. TraceFS: The Newest Linux File-System
  4. My Initial Intel Broadwell Linux Experience With The ThinkPad X1 Carbon
  5. Broadwell Linux Ultrabook Running MUCH Cooler Than Haswell
  6. LZHAM 1.0 Lossless Data Compression Codec Released
  7. Interstellar Marines On Linux With Catalyst: Bull S*#@
  8. Linux Users Upset By Chromium's Busted HiDPI Support