12 Apr
2011
12 Apr
'11
12:51 p.m.
On Tue, Apr 12, 2011 at 09:30:59AM -0400, Roland Haas wrote:
- RotatingSymmety90/180: Intel compilers seem to create faulty code when
using OpenMP for the count and icount reduction operations, the counts end up being number_of_threads*total_number_of_points
I tracked this down to the compiler options "-ip". After removing this option, the testsuites pass. Apparently, this option has been the cause of trouble several times in the past already (reading from several option list comments now), so be very careful when using it.
I am not sure if I should trust the icc help:
-[no-]ip enable(DEFAULT)/disable single-file IP optimization within files
Because it states that -ip would be on by default, but I do see, using the numrel-intel.cfg from simfactory, that the results change when I don't use the option.
Frank