Re: [PATCH RESEND v1 1/4] lib/vdso: Mark do_hres_timens() and do_coarse_timens() __always_inline()

Thomas Gleixner
2021-04-12T12:47:54Z

On Wed, Mar 31 2021 at 16:48, Christophe Leroy wrote:
> In the same spirit as commit c966533f8c6c ("lib/vdso: Mark do_hres()
> and do_coarse() as __always_inline"), mark do_hres_timens() and
> do_coarse_timens() __always_inline.
>
> The measurement below in on a non timens process, ie on the fastest path.
>
> On powerpc32, without the patch:
>
> clock-gettime-monotonic-raw: vdso: 1155 nsec/call
> clock-gettime-monotonic-coarse: vdso: 813 nsec/call
> clock-gettime-monotonic: vdso: 1076 nsec/call
>
> With the patch:
>
> clock-gettime-monotonic-raw: vdso: 1100 nsec/call
> clock-gettime-monotonic-coarse: vdso: 667 nsec/call
> clock-gettime-monotonic: vdso: 1025 nsec/call
>
> Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>

Reviewed-by: Thomas Gleixner <tglx@linutronix.de>