Re: parallel make hangs

On Wed, Nov 22, 2017 at 9:38 AM, John W. Eaton <address@hidden> wrote:

On 11/22/2017 09:03 AM, Dmitri A. Sergatskov wrote:

On Tue, Nov 21, 2017 at 9:06 PM, Daniel J Sebald <address@hidden <mailto:address@hidden>> wrote:

On 11/21/2017 07:01 PM, Dmitri A. Sergatskov wrote:

Every now and then parallel make (make -j8 in my case) hangs at
....
   GEN doc/interpreter/octave.html/splinefit3.png
   GEN doc/interpreter/octave.html/splinefit4.png
   GEN doc/interpreter/octave.html/splinefit6.png
   GEN doc/interpreter/octave.html/octave.css
(with octave process running at 100% cpu load)
Killing it with Ctrl-C results in:

^Cmake[2]: *** Deleting file 'doc/interpreter/convhull.eps'
^C^Cfatal: caught signal Interrupt -- stopping myself...
attempting to save variables to 'octave-workspace'...
octave exited with signal 11
make[1]: *** [Makefile:26595: all-recursive] Interrupt
make: *** [Makefile:10262: all] Interrupt

After that i can just issue simple make and it will finish no
problem.
It looks to me there are some race conditions...

Those happen sometimes. Here the make process hangs on voronoi.eps
(regardless of parallel build or not), but I think that is a
long-standing bug with osmesa and nVidia drivers. convhull and
voronoi figures are challenging for

   print (outfile, d_typ);

for some reason. Didn't simply running "make -j8" a second time
succeed?

This all sounds plausible.

Are you using a Mesa libGL on this system, or do you have the nvidia libGL? If it is not Mesa by default, are you preloading the Mesa library?

I am preloading mesa. I do not use nvidia libGL. The computer used to hang intermittently when running

dump plot demos. I guess I got misled by what appears to be happening during building of octave.css.

It does not happen too often (fortunately/unfortunately).

jwe

Dmitri.

--

From:	Dmitri A. Sergatskov
Subject:	Re: parallel make hangs
Date:	Wed, 22 Nov 2017 09:45:46 -0600