Date: Thu, 20 Jul 2000 10:48:28 -0500 From: Karl Lehenbauer <karl@NeoSoft.com> To: freebsd-small@FreeBSD.ORG Subject: Re: Real Time FreeBSD ?? Message-ID: <39771F49.527C9E12@NeoSoft.com> References: <3976A75D.9935.2F629B@localhost>
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There is *some* realtime stuff in FreeBSD. Check out rtprio(1) and rtprio(2). "A realtime process can only be preempted by a process of equal or higher priority, or by an interrupt." Also check out posix1b(9), which documents kernel options for posix priority scheduling. Also the asynchronous I/O operations aio_write(2), aio_read(2) and friends support posix prioritized I/O. There is a warning in one of the pages that FreeBSD can't guarantee it won't take a page fault on a realtime process. Also, system calls are not preemptable. -- Karl Lehenbauer employee #0 procplace.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-small" in the body of the message
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