Re: more on proff crash building native

["Michael L. Hitch" <mhitch%lightning.msu.montana.edu@localhost>]

On Sat, 14 Feb 2009, Greg Oster wrote:

> >    Native builds (when continued several times after the above problem)
> > will hang the machine when it tries compiling libm/catan.ln.  I'm trying
> > to collect some more information on that and will submit a PR.
>
> Hmm.. I'm not quite up to that point yet (but have restarted the
> build often enough to be past the pic/grops/groff/whatever issue),
> but I see I'm using some 69MB of swap right now.. (the machine has 32MB).
> I've added an extra 500MB swap -- could your box be running out of
> memory/swap when it gets to working on libm/catan.ln ?

  Hmmm, I'll guess this has something to do with it:

lib/libm/complex/catan.c:41:#define MAXNUM 1.0e308
lib/libm/complex/catan.c:77:    w = MAXNUM + MAXNUM * I;

  I got this by doing one single step in DDB after it hung:

/home/mhitch/NetBSD-5/src/lib/libm/complex/catan.c(77): warning: 
floating-point constant out of range [248]
/home/mhitch/NetBSD-5/src/lib/libm/complex/catan.c(77): warning: 
floating-point constant out of range [248]
lint: /usr/libexec/lint1 got SIGTRAP

  The complex routines were added 17 months ago, and probably without 
knowing or realizing that vax floating point is different.

  Doing a show uvmexp prior to running the lint command and a couple of
times during the run shows that the trap count is increasing rapidly:

  faults=736035, traps=1495911, intrs=9165866, ctxswitch=1024010
  faults=736760, traps=1653997, intrs=9169457, ctxswitch=1024510
  faults=736760, traps=2074777, intrs=9172623, ctxswitch=1024530


--
Michael L. Hitch                        mhitch%montana.edu@localhost
Computer Consultant
Information Technology Center
Montana State University        Bozeman, MT     USA