LoongArch: KVM: Make vcpu_is_preempted() as a macro rather than function

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vcpu_is_preempted() is performance sensitive that called in function
osq_lock(), here make it as a macro. So that parameter is not parsed
at most time, it can avoid cache line thrashing across numa nodes.

Here is part of UnixBench result on Loongson-3C5000 DualWay machine with
32 cores and 2 numa nodes.

          original    inline   macro
execl     7025.7      6991.2   7242.3
fstime    474.6       703.1    1071

From the test result, making vcpu_is_preempted() as a macro is the best,
and there is some improvment compared with the original function method.

Signed-off-by: Bibo Mao <maobibo@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>

...

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Bibo Mao 2026-04-09 18:56:36 +08:00 • committed by Huacai Chen

parent aac656857e

commit c43dce6f13

2 changed files with 24 additions and 18 deletions

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26

arch/loongarch/include/asm/qspinlock.h

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16

arch/loongarch/kernel/paravirt.c

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