Date: Sat, 6 Jun 1998 05:15:19 -0400 (EDT) From: Peter Dufault <dufault@hda.com> To: julian@whistle.com (Julian Elischer) Cc: hackers@FreeBSD.ORG, calebm@uspaceware.com Subject: Re: [Fwd: FW: Adapting FreeBSD to be a RTOS] Message-ID: <199806060915.FAA09885@hda.hda.com> In-Reply-To: <35782846.ABD322C@whistle.com> from Julian Elischer at "Jun 5, 98 10:17:58 am"
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> Caleb R. Miller wrote: > > > > What I was looking for was a version of FreeBSD that had > > preemptive multitasking such that processes can run at > > different rates and get preempted if they don't complete > > within the assigned time. I did find a version of Linux > > that has a real-time kernel and that runs Linux as a process. > > I was wondering if anyone had done a similar thing with > > FreeBSD or had modified the FreeBSD kernel to do > > preemptive multitasking. There is nothing yet except "rtprio" / POSIX fixed priority scheduler. The processes will preempt, but the kernel is not reentrant. I don't know if this is what you want. I'm sketching out something for SMP or a time multiplexed kernel. Peter -- Peter Dufault (dufault@hda.com) Realtime development, Machine control, HD Associates, Inc. Safety critical systems, Agency approval To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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