Re: 8aeb879baf12 - significant system call latency regression, bisected

[H. Peter Anvin]

On 2026-06-18 15:40, H. Peter Anvin wrote:
> On 2026-06-17 05:37, Peter Zijlstra wrote:
> > This builds with kcfi on and seems to do more or less do what is expected.
> >
> > I've not actually tried performance measurements on my IDT based system.
>
> I'm going to run this through its paces.

Well, isn't this cute.

It *does* indeed align x64_sys_call() now, but the performance is firmly 
in the "bad" bucket, higher variance and all...

	-hpa