Date: Mon, 22 Sep 1997 18:38:17 -0700 (PDT) From: 0000-Administrator <root@counterintelligence.ml.org> To: dufault@hda.com Cc: freebsd-hackers@freebsd.org Subject: Re: LABPC Driver Message-ID: <Pine.BSF.3.96.970922183800.1407A-100000@counterintelligence.ml.org> In-Reply-To: <Pine.BSF.3.96.970922182408.1380A-100000@counterintelligence.ml.org>
next in thread | previous in thread | raw e-mail | index | archive | help
On Mon, 22 Sep 1997, 0000-Administrator wrote: > > What capacity are you using this board in, in particular is it possible > with the labpc to have it scan the 8 analog channels at a high freq (like > 1000hz) and interrupt after each scan then if you open a /dev/ad7 or what > not you will just get more or less continuos output so you can sit > blocked at a select() call with no timeout and basically get stuff run at > the freq of input (more or less) or are you still limited to the 100hz > scheduling clock (what if you are running under realtime priorities). > > HACKERS? ---------\ > | > \/ > > In particular what happens when you are stopped (such as at a select() > call) in a rtprioed process, when interrupts occur and I/O comes in that > would unblock you if you are the highest (actually lowest numbered) > rtprioed process do you pretty much immediately get unblocked and excuted > or do you have to wait until the next scheduling clock tick? > > > >
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?Pine.BSF.3.96.970922183800.1407A-100000>