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Date:      Fri, 5 Jun 1998 13:45:08 -0600
From:      "Caleb R. Miller" <calebm@uspaceware.com>
To:        "'hackers@freebsd.org'" <hackers@FreeBSD.ORG>
Subject:   FreeBSD as a RTOS
Message-ID:  <01BD9088.27E19890@CALEBM>

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Hello,

Does anyone know of a FreeBSD port that supports RTOS functionality such as preemptive multitasking?  What I hoping for was a scheduler that would enforce time constraints on processes.  For instance, I want to schedule some processes to be allowed to run 4 times/sec, some 2 times/sec and some once/sec.  The scheduler would let give the highest rate process time, then the next higher rate, and so on with the caveat that a process gets no more cpu time than it's scheduled for, i.e. if process A is scheduled for every 30 seconds and process B for every 15 seconds, if A is not done by the next 15 second interval it is preempted and B is allowed to run.

Thanks for the help!
Caleb 




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