Re: [PATCH 3/4] sched/numa: Allow a floating imbalance between NUMA nodes

2020-11-20 Thread Vincent Guittot
On Fri, 20 Nov 2020 at 10:06, Mel Gorman wrote: > > Currently, an imbalance is only allowed when a destination node > is almost completely idle. This solved one basic class of problems > and was the cautious approach. > > This patch revisits the possibility that NUMA nodes can be imbalanced >

[PATCH 3/4] sched/numa: Allow a floating imbalance between NUMA nodes

2020-11-20 Thread Mel Gorman
Currently, an imbalance is only allowed when a destination node is almost completely idle. This solved one basic class of problems and was the cautious approach. This patch revisits the possibility that NUMA nodes can be imbalanced until 25% of the CPUs are occupied. The reasoning behind 25% is

[PATCH 3/4] sched/numa: Allow a floating imbalance between NUMA nodes

2020-11-19 Thread Mel Gorman
Currently, an imbalance is only allowed when a destination node is almost completely idle. This solved one basic class of problems and was the cautious approach. This patch revisits the possibility that NUMA nodes can be imbalanced until 25% of the CPUs are occupied. The reasoning behind 25% is