Date: Sun, 30 Sep 2001 23:18:27 +0200 From: Poul-Henning Kamp <phk@critter.freebsd.dk> To: Bart Kus <bsd@shell-server.com> Cc: hackers@freebsd.org Subject: Re: sio modification Message-ID: <7490.1001884707@critter> In-Reply-To: Your message of "Sun, 30 Sep 2001 16:04:50 CDT." <200109301600.21610@EO>
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In message <200109301600.21610@EO>, Bart Kus writes: >On Sunday 30 September 2001 13:18, you wrote: >> It's in sio.c already. > > Sorry to bug you again, but it seems that the PPS driver for sio doesn't >support PPS_CANWAIT. Am I correct in that assessment? Without blocking, I >don't see any other mechanism for event-driven execution. The RFC seems to Yes, you'll have to poll, sorry... >hint towards sampling at the Nyquist frequency in the case of a missing >PPS_CANWAIT. Establishing an 80kHz loop is pretty much impossible given the >100Hz resolution of nanosleep() and friends. > > --Bart > -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 phk@FreeBSD.ORG | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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