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

Full DynTicks Proposed For Linux Kernel Integration

Linux Kernel

Published on 05 May 2013 11:17 AM EDT
Written by Michael Larabel in Linux Kernel
6 Comments

Aside from the KVM pull request, another interesting proposed change for the Linux 3.10 kernel is the "full dynticks" support, also known as CONFIG_NO_HZ_FULL. Ingo Molnar is trying to get this brand new feature into the next Linux kernel release.

Ingo Molnar wrote a lengthy request to Torvalds to pull the Git feature branch that provides full dynticks / CONFIG_NO_HZ_FULL. This is the work largely done by Frederic Weisbecker as part of an adaptive tickless kernel and can yield performance improvements.

The "full dynticks" option is a core kernel feature and extends the earlier dynamic ticks feature to work on busy CPUs too rather than just those idling. This can yield a reduction in the number of timer interrupts that are generated by quite a lot.

This CONFIG_NO_HZ_FULL support is of interest in particular to real-time Linux users and also can be of great benefit to HPC (High Performance Computing) workloads where there is only one task running (performance improvements by maybe 1%), a reduction in real-time workload latency, and can also help desktop and mobile users where there is just one CPU task active on a given core. The only downside to this work is longer to-idle and from-idle latency.

Kernel developers are hoping to have this feature introduced into the Linux 3.10 kernel but there is still a bit uncertainty as there are some loose ends remaining and other small changes the developers are still looking at doing in the near future. Regardless, it should be an interesting kernel feature to benchmark once it's been merged to mainline.

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. 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