Re: [hwloc-users] unusual memory binding results

2019-01-21 Thread Biddiscombe, John A.
>One way to debug would be to disable touching in N-1 thread to check >that everything allocated in on the right node. I shall try that. Thanks ___ hwloc-users mailing list hwloc-users@lists.open-mpi.org

Re: [hwloc-users] unusual memory binding results

2019-01-21 Thread Biddiscombe, John A.
Brice Apologies, I didn't explain it very well, I do make sure that if the tile size 256*8 < 4096 (pagesize), then I double the number of tiles per page, I just wanted to keep the explanation simple. here are some code snippets to give you the flavour of it initializing the helper sruct

Re: [hwloc-users] unusual memory binding results

2019-01-21 Thread Brice Goglin
Le 21/01/2019 à 17:08, Biddiscombe, John A. a écrit : > Dear list, > > I'm allocating a matrix of size (say) 2048*2048 on a node with 2 numa domains > and initializing the matrix by using 2 threads, one pinned on each numa > domain - with the idea that I can create tiles of memory bound to each

[hwloc-users] unusual memory binding results

2019-01-21 Thread Biddiscombe, John A.
Dear list, I'm allocating a matrix of size (say) 2048*2048 on a node with 2 numa domains and initializing the matrix by using 2 threads, one pinned on each numa domain - with the idea that I can create tiles of memory bound to each numa domain rather than having pages assigned all to one,