On Mon, Jan 30, 2012 at 5:11 PM, Richard Walsh <richard.wa...@csi.cuny.edu> wrote: > I have not seen this mpirun error with the OpenMPI version I have built > with Intel 12.1 and the mpicc fix: > openmpi-1.5.5rc1.tar.bz2
Hi, I haven't tried that version yet. I was trying to build a supplementary package to the openmpi 1.5.3 shipped with RHEL6.2, the same source, just built using the Intel compiler. > and from the looks of things, I wonder if your problem is related. The > solution in the original case was to conditionally dial-down optimization > when using the 12.1 compiler to prevent the compiler itself from crashing > during a compile. What you present is a failure during execution. Such > failures might be due to over zealous optimization, but there seems to be > little reason on the face of it to believe that there is a connection between > the former and the latter. Well, the similarity is that it is also a crash in the malloc routine. I don't know if my optflags are too high, I have derived them from Red Hat's, replacing the options unkown to icc: -O2 -g -pipe -Wall -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=pentium4 > Does this failure occur with all attempts to use 'mpirun' whatever the source? > My 'mpicc' problem did. If this is true and If you believe it is an > optimization > level issue you could try turning it off in the failing routine and see if > that > produces a remedy. I would also try things with the very latest release. Yes, the mpicc crash happened every time, I could reproduce that. I have only tested the most basic code, the cpi.c example. The funny thing is, that mpirun -np 8 cpi doesn't always crash, sometimes it finishes just fine. Regards, Götz Waschk
