Language Selection

English French German Italian Portuguese Spanish

A Good Reason to Use PCLinuxOS 2010

Filed under

The search for the perfect kernel scheduler is like searching for the Holy Grail. Linux 2.6 started with the O(1) scheduler, which solved a lot of issues for real-time processes. However, it didn’t scale to large NUMA (non-uniform memory access) machines. The Linux kernel can scale to 4096 processors. Not all the processors have to share the same bus architecture and memory. Rather, a machine could consist of multiple 16 to 24 processor systems connected by a high-speed bus. This is the world of NUMA, as each sysem has its own memory that can be shared with other systems. The Completely Fair Scheduler (CFS) scaled to large NUMA machines, but created problems with systems that had less than 16 cores. CFS also scales well to the high core count of new GPUs (Graphic Processing Unit), which can also run non-graphical processes. For mobile devices with less than 16 cores, it creates problems with heating.

CFS trades higher kernel overhead for maximizing interactive performance. On mobile devices, the higher overhead means running the processor at higher speeds, which builds more heat. Heat is the enemy of every mobile device.

rest here

More in Tux Machines

OSS Leftovers

  • DataBasin - object inspector and updates
    First, the underlying DataBasinKit framework got an important update.
  • In-demand dev skills, understanding licensing, and more open source news
  • Higher ed systems expanding access to open-source materials
    Open-source learning technology is at the core of higher education for institutions that want to reach broader audiences with very strict ideas about how convenient learning should be. But developing these initiatives does not happen quickly or easily. It requires strong leadership in information technology, expertise to determine which solutions work best for a campus, and a financial commitment to making sure the technology is sustainable.
  • Proxmark Pro Proxmark3 Standalone Open Source RFID Tester (video)
    Rysc Corp has unveiled a new open source board in the form of the Proxmark Pro which now offers a true standalone client and RFID test instrument, check out the video below to learn more. The Proxmark Pro will feature an FPGA with 5 times the logic cells of the Proxmark3 and will remove the need to switch between HF and LF bit streams during operation, to use developers.
  • ErupteD Brings Vulkan To The D Programming Language
    The D programming language is just the latest to have support for Vulkan alongside C++, Rust (via Vulkano, if you missed that project), Go, and many other modern languages getting bindings for this Khronos Group high performance graphics API. Should you not be familiar with the D language, see Wikipedia.

Leftovers: Security