Dear Jesper,
I also did similar experiment with running eddy more times on the same subject (the purpose was to test whether there is an effect of ECC on GPU, I did this both on GPU with ECC and without ECC to see whether there is a difference between runs done on GPU without ECC). I used --s2v and also --initrand. I compared difference between runs on the same GPU. With --initrand the results are much more similar (without --initrand the maximal voxel-wise difference was ~100) but still not the same as I expected (with --initrand the maximal voxel-wise difference was ~1 regardless of ECC). Is here another random factor present despite using --initrand?
Antonin
|