sched/psi: Remove NR_ONCPU task accounting

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We put all fields updated by the scheduler in the first cacheline of
struct psi_group_cpu for performance.

Since we want add another PSI_IRQ_FULL to track IRQ/SOFTIRQ pressure,
we need to reclaim space first. This patch remove NR_ONCPU task accounting
in struct psi_group_cpu, use one bit in state_mask to track instead.

Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Chengming Zhou <zhouchengming@bytedance.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Chengming Zhou <zhouchengming@bytedance.com>
Tested-by: Chengming Zhou <zhouchengming@bytedance.com>
Link: https://lore.kernel.org/r/20220825164111.29534-7-zhouchengming@bytedance.com

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Johannes Weiner 2022-08-26 00:41:07 +08:00 • committed by Peter Zijlstra

parent 65176f59a1

commit 71dbdde791

2 changed files with 37 additions and 20 deletions

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16

include/linux/psi_types.h

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41

kernel/sched/psi.c

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