Re: Excluding one of n Cores
"Lennart Sorensen" <[email protected]>
| Newsgroups | gmane.linux.uclinux.devel |
|---|---|
| Message-ID | <[email protected]> |
On Mon, Jul 29, 2013 at 12:51:31PM +0200, Michael Schnell wrote: > Hi Experts. > > Is there a kind of "official" way to set aside one of the available > cores in an SMP system from the Linux OS to do deeply embedded > extremely-low-latency stuff in a kind of single task "main loop" > type environment ? I.e. creating a true coprocessor from an SMP > hardware. > > Some of the problems that come in ind here include: > > - how to make the Linux initialization ignore one of the available > cores or free a core later on ? > - how to have a Linux task start the free running main loop ? > - how to assign certain interrupts to that core and have ISRs run > there only dedicatedly interrupting the "main loop" and not ever > being blocked by any Linux activity ? > - what about MMU issues ? > > For example I (e.g.) would like a (now rather cheap) standard > quadcore ARM Cortex A9 processor chip and modify a Debian > distribution in a way that support this stuff. Something like this: http://lwn.net/Articles/464391/ -- Len Sorensen _______________________________________________ uClinux-dev mailing list [email protected] http://mailman.uclinux.org/mailman/listinfo/uclinux-dev This message was resent by [email protected] To unsubscribe see: http://mailman.uclinux.org/mailman/options/uclinux-dev