We made the mistake of setting TaskAffinity=yes, though I'm not sure why we did that. There seems to be a bug where the first node has cgroup/cpuset and task affinity set correctly, but subsequent nodes set task affinity for *all* tasks to be CPU 0. We hadn't gotten around to reporting it yet but it's worth checking out.
Ryan On 08/05/2013 05:52 PM, Kevin Abbey wrote:
Hi , I started using cgroups for control memory usage last week. One user reported his application takes 4 times longer to complete. I read elsewhere that cgroup mem. control can reduce performance. Is this amount realistic? Is there a more efficient method to control memory usage on nodes which are shared? Thank you for any advice, Kevin
-- Ryan Cox Operations Director Fulton Supercomputing Lab Brigham Young University
