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