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 3.15 Can Resume From Suspend 7~12x Faster

Linux Kernel

Published on 12 April 2014 08:17 AM EDT
Written by Michael Larabel in Linux Kernel
17 Comments

Early on in the Linux 3.15 merge window there were improvements to significantly speed-up suspend and resume for systems, but now there's another late merge of a patch that has the capability of speeding up the resume time from suspend by 7~12x for at least some laptop/desktop systems.

The work that was merged about two weeks ago for speeding up suspend and resume came down to enabling more asynchronous threads within the ACPI / power management code for different phases. By using more async threads, the time to both suspend and resume is dropped significantly.

The work that was merged on Friday night for the Linux 3.15 kernel primarily benefits the resume process. With work done by Intel, there's a much faster resume process due to async SCSI resume support. This work allows for disks and other devices to resume in parallel and yields performance benefits for real hardware.

Up to now the kernel resume process has been blocked by waiting for ATA devices to come online before resuming the boot process, but now with this merged patch the wakeup command is fired off and then returned immediately. This allows multiple ATA devices to be waked up concurrently. The rest of the kernel can also continue resuming while any commands sent to ATA/SCSI hardware is queued up until the device has notified the kernel that it's awake.

Linux 3.15 Can Resume From Suspend 7~12x Faster


This resume benefit is written about at length on Intel's 01.org. Results shared by the developer show a 10.5x speedup for an Intel Core i7 3960X system resuming now in 1.1 seconds compared to 11.6 seconds previously, a 12x speed-up for an Intel Core i7 3770 system resuming in 0.45 seconds compared to 5.4 seconds in the past, and a 7.8x speedup for an Intel Core i7 4770S system resuming in 0.69 seconds compared to 5.4 seconds with the unpatched 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 Linux Hardware Reviews
  1. A Walkthrough Of The New 32 System Open-Source Linux Benchmarking Test Farm
  2. Habey MITX-6771: Mini-ITX Board With Quad-Core J1900 Bay Trail
  3. OCZ Vector 150 SSD On Linux
  4. Noctua i4 CPU Cooler: Great For Cooling High-End LGA-2011v3 CPUs
Latest Linux Articles
  1. 17-Way Linux Graphics Card Comparison With Civilization Beyond Earth
  2. AMD Kaveri: Open-Source Radeon Gallium3D vs. Catalyst 14.12 Omega Driver
  3. 12-Way AMD Catalyst 14.12 vs. NVIDIA 346 Series Linux GPU Comparison
  4. AMD Catalyst 14.12 Omega Driver Brings Mixed Results For Linux Users
Latest Linux News
  1. Fedora Doesn't Yet Enable F2FS File-System Support
  2. XZ 5.2 Adds New Multi-Threaded Options
  3. Intel 2.99.917 X.Org Driver Released, 3.0 Release Finally Near
  4. Server-Side XCB Is Being Discussed For The X.Org Server
  5. Adreno A4xx Rendering With Freedreno Takes Shape
  6. Linux 3.19-rc1 Kernel Released Ahead Of Schedule
  7. X.Org Server 1.16.3 Released To Fix Security Issues
  8. Linux 3.19 Merge Window Closes Ahead Of Schedule
  9. MIPS R6 Architecture Now Supported By GCC
  10. LowRISC To Feature Tagged Memory & Minion Cores
Latest Forum Discussions
  1. FPS capped on Linux (AMD fglrx drivers)
  2. Maker3D - create your 3D RPG
  3. Need some hand holding with upgrading xserver
  4. Speeding up systemd networking service
  5. Major Performance Breakthrough Discovered For Intel's Mesa Driver
  6. Looking for an nVidia GPU, but not sure how well they are supported.
  7. Are there an app using HSA ?
  8. The New SuperTuxKart Looks Better, But Can Cause GPU/Driver Problems