Re: [PATCH v4] kprobes,lib: kretprobe scalability improvement

[wuqiang]

On 2022/11/3 05:33, Andrew Morton wrote:
> On Wed,  2 Nov 2022 10:30:12 +0800 wuqiang <wuqiang.matt@xxxxxxxxxxxxx> wrote:
>
> > Tests of
> > kretprobe throughput show the biggest ratio as 333.9x of the original
> > freelist.
>
> Seriously.
>
> I'll add this for some runtime testing.

Thanks.

> Are you able to identify other parts of the kernel which could use
> (and benefit from) the new objpool?

The scalability issue is caused by freelist. Currently kretprobe and rethook 
are the only use cases.

I'm working on the evaluation of bpf percpu-freelist, which scales well but 
uses raw_spinlock and needs local irq disabled.