Not LinuxCNC specific, and going from the top of my head (it's been a long time since I hacked away at Linux kernel) -- booting in 3 seconds is a bit tough to do, even with SSD -- but the key thing is to strip as many services and dynamically loaded device drivers. If you can get the kernel image small enough, it *might* also be faster to have an uncompressed kernel (there's a disk I/O tradeoff versus the time spent unpacking the kernel).
Some architectures are able to "XIP" execute-in-place, running the kernel directly out of "ROM" (typically FLASH) - it eliminates a bulk of the setup time to get the kernel running, however, ROM/FLASH access has traditionally been slower than RAM, so there's performance tradeoffs to consider there as well. This elinux.org page can give you some ideas on the performance improvement for uncompressed, and XIP kernels. These are non-PC architectures, though. http://elinux.org/Kernel_XIP On Tue, Jun 12, 2012 at 9:16 AM, Stuart Stevenson <stus...@gmail.com> wrote: > Gentlemen, > What would it take to headless boot LinuxCNC in 3 seconds? > thanks > Stuart > > -- > dos centavos > > ------------------------------------------------------------------------------ > Live Security Virtual Conference > Exclusive live event will cover all the ways today's security and > threat landscape has changed and how IT managers can respond. Discussions > will include endpoint security, mobile security and the latest in malware > threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > > ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
