Re: [Freesurfer] Building FreeSurfer with OpenMP enabled

2012-06-14 Thread Nick Schmansky
Aiko, Per question (1), there will always be slight differences due to the nature of our algorithms, but the thing to do to convince yourself that the differences are not significant is to conduct a group analysis (following the procedures we describe in our tutorials) comparing say 4threads to 8t

Re: [Freesurfer] Building FreeSurfer with OpenMP enabled

2012-06-14 Thread Bruce Fischl
Hi Akio we are going to work our way through the time-intensive binaries and parallelize them, but it will take us time to get to them. cheers Bruce On Thu, 14 Jun 2012, Akio Yamamoto wrote: > Hi Nick, > > I confirmed that the program run in multi-thread mode by adding the > "-openmp" flag. Th

Re: [Freesurfer] Building FreeSurfer with OpenMP enabled

2012-06-14 Thread Akio Yamamoto
Hi Nick, I confirmed that the program run in multi-thread mode by adding the "-openmp" flag. Thank you so much for your help. May I ask a few more questions? (1) Again, I find minor difference between the two results obtained by running in single-thread and multi-thread mode (say, numthreads i

Re: [Freesurfer] Building FreeSurfer with OpenMP enabled

2012-06-12 Thread Nick Schmansky
Akio, the results of our dev tree will be different from the stable branch (as we are continually incorporating improvements in the dev tree which eventually make their way into the public stable release). The new OpenMP code will also change the results, but we have found not significant differe

[Freesurfer] Building FreeSurfer with OpenMP enabled

2012-06-12 Thread Akio Yamamoto
Hi all, I'm attempting to build FreeSurfer with OpenMP enabled. After checking out a copy of the main dev trunk from the CVS repository, I did the configuration with "--enable-openmp" option and run 'make'. Compilation successfully finished and all of 'make check' tests passed. Now I have two qu