Commit f2368a20 authored by Yicong Yang's avatar Yicong Yang Committed by Will Deacon
Browse files

drivers/perf: hisi: Don't update the associated_cpus on CPU offline 



Event will be scheduled on CPU of hisi_pmu::on_cpu which is selected
from the intersection of hisi_pmu::associated_cpus and online CPUs.
So the associated_cpus don't need to be maintained with online CPUs.
This will save one update operation if one associated CPU is offlined.

Signed-off-by: default avatarYicong Yang <yangyicong@hisilicon.com>
Link: https://lore.kernel.org/r/20241210141525.37788-3-yangyicong@huawei.com


Signed-off-by: default avatarWill Deacon <will@kernel.org>
parent 41729809

drivers/perf/hisilicon/hisi_uncore_pmu.c

+0 −3
Original line number Diff line number Diff line
@@ -492,9 +492,6 @@ int hisi_uncore_pmu_offline_cpu(unsigned int cpu, struct hlist_node *node) 
						     node);

	unsigned int target;



	if (!cpumask_test_and_clear_cpu(cpu, &hisi_pmu->associated_cpus))

		return 0;



	/* Nothing to do if this CPU doesn't own the PMU */

	if (hisi_pmu->on_cpu != cpu)

		return 0;