On Mon, 13 Feb 2017 11:04:06 +
David Laight wrote:
> From: Nicholas Piggin
> > Sent: 10 February 2017 18:23
> > After bc3551257a ("powerpc/64: Allow for relocation-on interrupts from
> > guest to host"), a getppid() system call goes from 307 cycles to 358
> > cycles
From: Nicholas Piggin
> Sent: 10 February 2017 18:23
> After bc3551257a ("powerpc/64: Allow for relocation-on interrupts from
> guest to host"), a getppid() system call goes from 307 cycles to 358
> cycles (+17%). This is due significantly to the scratch SPR used by the
> hypercall.
>
> It turns