Hello Ralph, wow, that's not good to hear. I knew the perl ithreads implementation wasn't all that efficient, but causing a deadlock sounds like you have more trouble than just perl; at least I hope so. For reference, can you send 'perl -V' output (if you like, to the bug-automake at gnu.org list).
Thanks, Ralf * Ralph Castain wrote on Fri, Sep 24, 2010 at 03:12:16AM CEST: > I found one major negative to this change - it assumes that my build is > being done in exclusion of anything else on my computer. Unfortunately, this > is never true. > > So my laptop hemorrhaged itself into frozen silence, overheated to the point > of being burning hot, and had to have its battery yanked to stop the runaway > behavior. Not a really good thing. > > I would suggest you default this "heuristic" out, and let someone set it to > use multiple runs if-and-only-if they want it. Hate to cite the lowest > common denominator, but this was a very nasty surprise. > > > > On Wed, Sep 22, 2010 at 7:50 AM, Jeff Squyres <jsquy...@cisco.com> wrote: > > > Some of you may be unaware that recent versions of automake can run in > > parallel. That is, automake will run in parallel with a degree of (at most) > > $AUTOMAKE_JOBS. This can speed up the execution time of autogen.pl quite > > a bit on some platforms. On my cluster at cisco, here's a few quick timings > > of the entire autogen.pl process (of which, automake is the bottleneck): > > > > $AUTOMAKE_JOBS Total wall time > > value of autogen.pl > > 8 3:01.46 > > 4 2:55.57 > > 2 3:28.09 > > 1 4:38.44 > > > > This is an older Xeon machine with 2 sockets, each with 2 cores. > > > > There's a nice performance jump from 1 to 2, and a smaller jump from 2 to > > 4. 4 and 8 are close enough to not matter. YMMV. > > > > I just committed a heuristic to autogen.pl to setenv AUTOMAKE_JOBS if it > > is not already set (https://svn.open-mpi.org/trac/ompi/changeset/23788): > > > > - If lstopo is found in your $PATH, runs it and count how many PU's > > (processing units) you have. It'll set AUTOMAKE_JOBS to that number, or a > > maximum of 4 (which is admittedly a further heuristic). > > - If lstopo is not found, it just sets AUTOMAKE_JOBS to 2. > > > > Enjoy. > > > > -- > > Jeff Squyres > > jsquy...@cisco.com > > For corporate legal information go to: > > http://www.cisco.com/web/about/doing_business/legal/cri/
