On Wednesday, December 12, 2012 14:34:33, Maxim Shkurygin wrote: > I used a minimal debian environment with a precompiled RT kernel for a > robotics project. However, I really don't see why you would need a > real time OS outside of robotics. > > More on RT Linux community: https://rt.wiki.kernel.org/index.php/Main_Page
Right... Real Time (RT) kernels are used for only specific situations where very low latency in the kernel response is necessary -- most likely relating to an interrupt-driven device driver / module. Occasionally I hear this come up in relation to DJing, because the typical latency of aduio in a typical Linux distro is a bit too high for some of the thigns DJs typically do. ... > >> On Dec 12, 2012, at 1:55 PM, WestHurley ComputerReCycling > >> > >> <[email protected]> wrote: > >>> A friend asked what is the best RealTime Lightweight Linux Distro? I > >>> said "Do not know but will try to get some answers. The use only needs > >>> a command line rather than a GUI interface. You can probably get a RealTime kernel for the distribution of your choice. For instance Debian includes several versions of -rt kernels in their main tree: # apt-cache search real time | egrep "^linux" linux-image-3.2.0-4-rt-686-pae - Linux 3.2 for modern PCs, PREEMPT_RT linux-image-3.2.0-4-rt-amd64 - Linux 3.2 for 64-bit PCs, PREEMPT_RT linux-image-rt-686-pae - Linux for modern PCs (meta-package), PREEMPT_RT linux-image-rt-amd64 - Linux for 64-bit PCs (meta-package), PREEMPT_RT linux-image-3.6-trunk-rt-686-pae - Linux 3.6 for modern PCs, PREEMPT_RT linux-image-3.6-trunk-rt-amd64 - Linux 3.6 for 64-bit PCs, PREEMPT_RT I had a brief look, but from what I can tell Ubuntu don't have -rt kernels available in the main distro. However if you had a ditro you really liked and wanted a -rt kernel, you could compile a custom one and thus get one that way. > >>> Any experience with these or any other RealTime Lightweight Linux > >>> Distros? I haven't done this myself, as I haven't had the need. -- Chris -- Chris Knadle [email protected] _______________________________________________ Mid-Hudson Valley Linux Users Group http://mhvlug.org http://mhvlug.org/cgi-bin/mailman/listinfo/mhvlug Upcoming Meetings (6pm - 8pm) Vassar College Jan 9 - High Performance Computing at a Small Scale Feb 6 - Raspberry Pi Mar 6 - 10th Anniversary Meeting!
