[LTP] [PATCH] read_all: limit per cpu nodes to first ten cpus

[Petr Vorel]

Hi Jan,

> Some per cpu sysfs entries have high lock contention and when
> this is combined with systems which have many CPUs (meaning they
> also have many per cpu sysfs entries) the test spends most of
> time on these nodes and occasionally also hits timeout.

> For example, these entries are largest contributor on HPE Apollo 70
> (aarch64, 256 CPUs):
>   /sys/kernel/tracing/per_cpu/cpu247/*
>   /sys/devices/system/cpu/cpu239/acpi_cppc/*

Acked-by: Petr Vorel <petr.vorel@gmail.com>

Kind regards,
Petr