Re: [PATCH] ipc/msg.c: mitigate the lock contention with percpu counter

[Andrew Morton]

On Wed, 7 Sep 2022 17:39:47 +0800 "Sun, Jiebin" <jiebin.sun@xxxxxxxxx> wrote:

> I have sent out the patch v4 which use percpu_counter_add_batch. If we use
> a tuned large batch size (1024),

Oh.  Why not simply use a batch size of INT_MAX?

> the performance gain is 3.17x (patch v4)
> vs 3.38x (patch v3) previously in stress-ng -- message. It still has
> significant performance improvement and also good balance between
> performance gain and overflow issue.