Date: Mon, 22 Dec 1997 19:14:48 +1030 From: Mike Smith <mike@smith.net.au> To: "J. Weatherbee - Senior Systems Architect" <jamil@acroal.com> Cc: hackers@FreeBSD.ORG Subject: Re: Am I off my rocker? (/dev/tick device) Message-ID: <199712220844.TAA00494@word.smith.net.au> In-Reply-To: Your message of "Mon, 22 Dec 1997 00:08:48 -0800." <Pine.BSF.3.96.971221234402.2497A-100000@acroal.com>
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> for read. I may be dealing with 64 or so descriptors, but I thought it > might be useful to have a /dev/tick pseudo device that would come ready > for i/o say 10-100 times a second (depending on an ioctl). So suppose you > open this device, and ioctl() it to 10 hertz, if you went into select() it > would return ~100ms after opening the read ready on the /dev/tick fd. When > you call read on /dev/tick, you get a unsigned int representing the number > of microseconds (or alternately milliseconds) elapsed since the descriptor > was opened. Try 'man setitimer' and 'man gettimeofday'. There's nothing you're suggesting that can't already be done with those two. mikehelp
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