Re: Feedback on 4.9 performance after PTI fixes

[Willy Tarreau]

On Mon, Jan 08, 2018 at 09:26:10PM +0100, Yves-Alexis Perez wrote:
> On Mon, 2018-01-08 at 19:26 +0100, Willy Tarreau wrote:
> > You're totally right, I discovered during my later developments that
> > indeed PCID is not exposed there. So we take the hit of a full TLB
> > flush twice per syscall.
> 
> So I really think it might make sense to redo the tests with PCID, because the
>  assumptions you're basing your patch series on might actually not hold.

I'll have to do it on the bare-metal server soon anyway.

Cheers,
Willy