Re: [PATCH v2 11/19] sched/numa: Restrict migrating in parallel to the same node.

2018-07-23 Thread Srikar Dronamraju
* Peter Zijlstra [2018-07-23 12:38:30]: > On Wed, Jun 20, 2018 at 10:32:52PM +0530, Srikar Dronamraju wrote: > > Since task migration under numa balancing can happen in parallel, more > > than one task might choose to move to the same node at the same time. > > This can cause load imbalances at t

Re: [PATCH v2 11/19] sched/numa: Restrict migrating in parallel to the same node.

2018-07-23 Thread Peter Zijlstra
On Wed, Jun 20, 2018 at 10:32:52PM +0530, Srikar Dronamraju wrote: > Since task migration under numa balancing can happen in parallel, more > than one task might choose to move to the same node at the same time. > This can cause load imbalances at the node level. > > The problem is more likely if

[PATCH v2 11/19] sched/numa: Restrict migrating in parallel to the same node.

2018-06-20 Thread Srikar Dronamraju
Since task migration under numa balancing can happen in parallel, more than one task might choose to move to the same node at the same time. This can cause load imbalances at the node level. The problem is more likely if there are more cores per node or more nodes in system. Use a per-node variab