Date: Wed, 2 Feb 2005 09:44:05 -0800 (PST) From: Julian Elischer <julian@elischer.org> To: Garrett Wollman <wollman@khavrinen.lcs.mit.edu> Cc: current@freebsd.org Subject: Re: cynchronised sleep capbilty.. Message-ID: <20050202094256.K88344@localhost> In-Reply-To: <200502011913.j11JDXsf084862@khavrinen.lcs.mit.edu> References: <20050201101113.J572@localhost> <20050201190318.GE45608@cirb503493.alcatel.com.au> <200502011913.j11JDXsf084862@khavrinen.lcs.mit.edu>
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very clever! however it doesn't phaselock to teh time and still drifts. I need to trigger on (for example) 10 second boundaries across 50 synchronised machines.. (so thatthe machines agree about the sampling period.) -- +------------------------------------+ ______ _ __ | __--_|\ Julian Elischer | \ U \/ / hard at work in | / \ julian@elischer.org +------>x USA \ a very strange | ( OZ ) \___ ___ | country ! +- X_.---._/ presently in San Francisco \_/ \\ v On Tue, 1 Feb 2005, Garrett Wollman wrote: > <<On Wed, 2 Feb 2005 06:03:18 +1100, Peter Jeremy <PeterJeremy@optushome.com.au> said: > > > 2) <kludge>Write a small C program that uses setitimer() and signals > > its parent whenever the timer triggers. Run it in the background > > and just pause within the sh loop.</kludge> > > SIGCHLD is good enough. > > while :; do > sleep 10 & > do_something > wait > done > > -GAWollman > > _______________________________________________ > freebsd-current@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-current > To unsubscribe, send any mail to "freebsd-current-unsubscribe@freebsd.org" >
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