PGI User Forum

[mkcolg]

Hi David,


Unfortunately, I don't know why our openMP performance actually degrades at two threads. I've seen this issue on SuSE 9.0, but this is a problem with pthreads and occurs with all compilers. We'd need to work with the code in order to determine what's going on, since we've obviously got an issue. Admittedly, our C++ perfomance does lag. We've mostly focused our efforts on Fortran and C performance. You'll some gains with the upcoming 6.0 compiler, but even more with future releases. Granted, this doesn't help you now. We would appreciate if you would submit a bug report to trs@pgroup.com so we can diagnosis and fix the problem.

Thanks,
Mat