Date: Wed, 2 Jun 1999 15:13:27 -0400 (EDT) From: Garrett Wollman <wollman@khavrinen.lcs.mit.edu> To: Bruce Evans <bde@zeta.org.au> Cc: dfr@nlsystems.com, wollman@khavrinen.lcs.mit.edu, current@FreeBSD.ORG, newton@atdot.dotat.org Subject: Re: IRQ sharing with newbus Message-ID: <199906021913.PAA24696@khavrinen.lcs.mit.edu> In-Reply-To: <199906020617.QAA17171@godzilla.zeta.org.au> References: <199906020617.QAA17171@godzilla.zeta.org.au>
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<<On Wed, 2 Jun 1999 16:17:36 +1000, Bruce Evans <bde@zeta.org.au> said: >> But the sio non-multiport stuff should be able to use RF_TIMESHARE. -- >> If I'm not using my serial port, I should be able to use my >> infrared.... > Preemptive timesharing would be hard to implement reasonably for irqs. > A uniform timeslice would have to be 86 usec to work properly for > unbuffered sio devices at 115200 bps. You're talking intervals about six orders of magnitude smaller than I am. -GAWollman -- Garrett A. Wollman | O Siem / We are all family / O Siem / We're all the same wollman@lcs.mit.edu | O Siem / The fires of freedom Opinions not those of| Dance in the burning flame MIT, LCS, CRS, or NSA| - Susan Aglukark and Chad Irschick To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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