From owner-freebsd-hackers Wed Jun 30 6:15:38 1999 Delivered-To: freebsd-hackers@freebsd.org Received: from gw-nl3.philips.com (gw-nl3.philips.com [192.68.44.35]) by hub.freebsd.org (Postfix) with ESMTP id 70CEA14E82 for ; Wed, 30 Jun 1999 06:15:31 -0700 (PDT) (envelope-from Jos.Backus@nl.origin-it.com) Received: from smtprelay-nl1.philips.com (localhost.philips.com [127.0.0.1]) by gw-nl3.philips.com with ESMTP id PAA23195 for ; Wed, 30 Jun 1999 15:15:30 +0200 (MEST) (envelope-from Jos.Backus@nl.origin-it.com) Received: from smtprelay-eur1.philips.com(130.139.36.3) by gw-nl3.philips.com via mwrap (4.0a) id xma023193; Wed, 30 Jun 99 15:15:30 +0200 Received: from hal.mpn.cp.philips.com (hal.mpn.cp.philips.com [130.139.64.195]) by smtprelay-nl1.philips.com (8.9.3/8.8.5-1.2.2m-19990317) with SMTP id PAA10011 for ; Wed, 30 Jun 1999 15:15:29 +0200 (MET DST) Received: (qmail 56265 invoked by uid 666); 30 Jun 1999 13:15:51 -0000 Date: Wed, 30 Jun 1999 15:15:51 +0200 From: Jos Backus To: freebsd-hackers@freebsd.org Subject: [tobi@caida.org: Re: [MRTG-DEV] CDEF's with LT and IF in .42] Message-ID: <19990630151551.C51182@hal.mpn.cp.philips.com> Reply-To: Jos Backus Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailer: Mutt 0.95.6i Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG Saw this on the MRTG-DEV list. NaN handling is perceived to be problematic, it seems. ----- Forwarded message from Tobi Oetiker ----- Date: Wed, 30 Jun 1999 02:16:55 +0200 (MET DST) From: Tobi Oetiker To: Jesper Skriver cc: mrtg-developers@list.ee.ethz.ch Subject: Re: [MRTG-DEV] CDEF's with LT and IF in .42 Today you sent me mail regarding Re: [MRTG-DEV] CDEF's with LT and IF in .42: *> On Tue, Jun 29, 1999 at 09:01:29PM +0200, Tobi Oetiker wrote: *> *> > aha ... thats in a perl context .. sorry I didn't realize ... could you send *> > me an example rrd and a short programm which demonstrates the problem ? *> *> Yes, this does the trick, it's very ugly code ... *> *> http://e.t.dk/test.pl test program, set $this_breaks to have it core dump *> http://e.t.dk/test.rrd FreeBSD 3.2-STABLE rrd *> http://e.t.dk/test.xml The above dump'ed into xml OK found your problem .... it is that old FreeBSD does no proper IEEE math ... for some comparison operations it raises an sigfpe if an NaN is involved ... the next release of rrdtool will come with a proper test to find the problem and a proper fix in the software to ignore sigfpe cheers tobi *> /Jesper *> *> -- ______ __ _ /_ __/_ / / (_) Oetiker, hacking RRDTOOL&MRTG @ Caida for the Summer / // _ \/ _ \/ / +1 619 822 0882 / tobi@caida.org / www.caida.org/~tobi /_/ \.__/_.__/_/ _______________________________________________________ -- * To unsubscribe from the mrtg-developers mailing list, send a message with the subject: unsubscribe to mrtg-developers-request@list.ee.ethz.ch * Mailing list archives are at http://www.ee.ethz.ch/~slist/mrtg-developers ----- End forwarded message ----- -- Jos Backus _/ _/_/_/ "Reliability means never _/ _/ _/ having to say you're sorry." _/ _/_/_/ -- D. J. Bernstein _/ _/ _/ _/ Jos.Backus@nl.origin-it.com _/_/ _/_/_/ use Std::Disclaimer; To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message