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Received: by minnie.vk1xwt.ampr.org with NNTP id AA1191 ; Tue, 23 Feb 93 14:29:33 EST Path: sserve!manuel.anu.edu.au!munnari.oz.au!spool.mu.edu!howland.reston.ans.net!usc!cs.utexas.edu!not-for-mail From: vazquez@iqm.unicamp.br (Pedro A.M. Vazquez) Newsgroups: comp.unix.bsd Subject: [386bsd] npx-0.1 causes lockup in npxprobe() - now what? ( Date: 12 Feb 1993 08:47:00 -0600 Organization: UTexas Mail-to-News Gateway Lines: 52 Sender: daemon@cs.utexas.edu Message-ID: <9302121437.AA09426@styx.iqm.unicamp.br> NNTP-Posting-Host: cs.utexas.edu > >Newsgroups: comp.unix.bsd > >Path: ccsun.unicamp.br!dcc.unicamp.br!agate!spool.mu.edu!decwrl!pacbell.com!UB.com!quack!dfox > >From: dfox@quack.sac.ca.us (David Fox) > >Subject: [386bsd] npx-0.1 causes lockup in npxprobe() - now what? > >Message-ID: <fZaiZXG@quack.sac.ca.us> > >Keywords: npx cyrix npxprobe ndp > >Organization: The Duck Pond public unix: +1 408 249 9630, log in as 'guest'. > >Date: 11 Feb 1993 08:38:16 UTC > >Lines: 60 > > > > Subsequent postings (which I replied to by email) suggested I could > comment out the fp_divideby0() and/or the npxprobe() routine. I tried > the first, didn't want to do the second, but did comment out a small > section where it was looking for irq16 (this applies only for 486s which > I don't have, it seems). > I have a similar problem: I'm unable to run two (or more) fpu intensive applications because a panic:npxintr crashes the system. This ocurred before applying patch-kit0.2 and less frequently after applying it. But a new problem came with patch-kit0.2: I can't display images with xv, it allways occur a fp overflow and the program aborts. The same kernel runs xv without this problem in another machine without a fpu unit. I applied npx-0.3-diff with the same results of David Fox, the system hangs on boot. Then I comented out the fp_divideby0() as sugested and the new kernel booted ok but issued the follow message: npx0<Error reporting broken (no IRQ13)> at 0xf0 on isa With this kernel I started my torture test: I put an molecular eletronic structure abinitio program to run in background, then started a rayshade and a raypaint of the same scene description file and checked if the clinpack and flops20 benchmarks would give diferent results from the previous kernel. No problems! Wonderfull! :-) Then I called xv to display a gif image and the system hang :-( After rebooting I tried to run paranoia on the console (no X) and the system hanged again when the program was looking for the overflow limit. Many resets after I confirmed the problem has to do with fp overflows, I hope this does not implies an incompatibility of IIT fpus with 386bsd as occurred with the ULSI chips (I was one of those ULSI unhappy owners ). Pedro