From 3b2a793ea70fd14136b442df31e53935e8095034 Mon Sep 17 00:00:00 2001 From: Swapnil Sapkal Date: Fri, 20 Dec 2024 06:32:21 +0000 Subject: sched: Report the different kinds of imbalances in /proc/schedstat In /proc/schedstat, lb_imbalance reports the sum of imbalances discovered in sched domains with each call to sched_balance_rq(), which is not very useful because lb_imbalance does not mention whether the imbalance is due to load, utilization, nr_tasks or misfit_tasks. Remove this field from /proc/schedstat. Currently there is no field in /proc/schedstat to report different types of imbalances. Introduce new fields in /proc/schedstat to report the total imbalances in load, utilization, nr_tasks or misfit_tasks. Added fields to /proc/schedstat: - lb_imbalance_load: Total imbalance due to load. - lb_imbalance_util: Total imbalance due to utilization. - lb_imbalance_task: Total imbalance due to number of tasks. - lb_imbalance_misfit: Total imbalance due to misfit tasks. Signed-off-by: Swapnil Sapkal Signed-off-by: Peter Zijlstra (Intel) Reviewed-by: Shrikanth Hegde Link: https://lore.kernel.org/r/20241220063224.17767-4-swapnil.sapkal@amd.com --- kernel/sched/stats.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) (limited to 'kernel/sched/stats.c') diff --git a/kernel/sched/stats.c b/kernel/sched/stats.c index eb0cdcd4d921..802bd9398a2e 100644 --- a/kernel/sched/stats.c +++ b/kernel/sched/stats.c @@ -141,11 +141,14 @@ static int show_schedstat(struct seq_file *seq, void *v) seq_printf(seq, "domain%d %*pb", dcount++, cpumask_pr_args(sched_domain_span(sd))); for (itype = 0; itype < CPU_MAX_IDLE_TYPES; itype++) { - seq_printf(seq, " %u %u %u %u %u %u %u %u", + seq_printf(seq, " %u %u %u %u %u %u %u %u %u %u %u", sd->lb_count[itype], sd->lb_balanced[itype], sd->lb_failed[itype], - sd->lb_imbalance[itype], + sd->lb_imbalance_load[itype], + sd->lb_imbalance_util[itype], + sd->lb_imbalance_task[itype], + sd->lb_imbalance_misfit[itype], sd->lb_gained[itype], sd->lb_hot_gained[itype], sd->lb_nobusyq[itype], -- cgit v1.2.3