This patchset based on v4.17, provides few simple cleanups and fixes in the sched/numa_balancing code. Some of these fixes are specific to systems having more than 2 nodes. Few patches add per-rq and per-node complexities to solve what I feel are a fairness/correctness issues.
This version handles the comments given to some of the patches. It also provides specjbb2005 numbers on a patch basis on a 4 node and 16 node system. Running SPECjbb2005 on a 4 node machine and comparing bops/JVM (higher bops are better) JVMS v4.17 v4.17+patch %CHANGE 16 25705.2 26158.1 1.731 1 74433 72725 -2.34 Running SPECjbb2005 on a 16 node machine and comparing bops/JVM (higher bops are better) JVMS v4.17 v4.17+patch %CHANGE 8 96589.6 113992 15.26 1 181830 174947 -3.93 Only patches, 2, 4, 13 and 16 have changes. The rest of the patches are unchanged. r For overall numbers with v1 running perf-bench please look at https://lwn.net/ml/linux-kernel/[email protected] Srikar Dronamraju (19): sched/numa: Remove redundant field. sched/numa: Evaluate move once per node sched/numa: Simplify load_too_imbalanced sched/numa: Set preferred_node based on best_cpu sched/numa: Use task faults only if numa_group is not yet setup sched/debug: Reverse the order of printing faults sched/numa: Skip nodes that are at hoplimit sched/numa: Remove unused task_capacity from numa_stats sched/numa: Modify migrate_swap to accept additional params sched/numa: Stop multiple tasks from moving to the cpu at the same time sched/numa: Restrict migrating in parallel to the same node. sched/numa: Remove numa_has_capacity mm/migrate: Use xchg instead of spinlock sched/numa: Updation of scan period need not be in lock sched/numa: Use group_weights to identify if migration degrades locality sched/numa: Detect if node actively handling migration sched/numa: Pass destination cpu as a parameter to migrate_task_rq sched/numa: Reset scan rate whenever task moves across nodes sched/numa: Move task_placement closer to numa_migrate_preferred include/linux/mmzone.h | 4 +- include/linux/sched.h | 1 - kernel/sched/core.c | 11 +- kernel/sched/deadline.c | 2 +- kernel/sched/debug.c | 4 +- kernel/sched/fair.c | 325 +++++++++++++++++++++++------------------------- kernel/sched/sched.h | 6 +- mm/migrate.c | 20 ++- mm/page_alloc.c | 2 +- 9 files changed, 187 insertions(+), 188 deletions(-) -- 1.8.3.1
