[dpdk-dev] [PATCH v8 2/5] eal: use wait event for read pflock

[Jerin Jacob]

On Fri, Oct 29, 2021 at 1:50 PM Feifei Wang <feifei.wang2 at arm.com> wrote:
>
> Instead of polling for read pflock update, use wait event scheme for
> this case.
>
> Signed-off-by: Feifei Wang <feifei.wang2 at arm.com>
> Reviewed-by: Ruifeng Wang <ruifeng.wang at arm.com>

Acked-by: Jerin Jacob <jerinj at marvell.com>


> ---
>  lib/eal/include/generic/rte_pflock.h | 4 +---
>  1 file changed, 1 insertion(+), 3 deletions(-)
>
> diff --git a/lib/eal/include/generic/rte_pflock.h b/lib/eal/include/generic/rte_pflock.h
> index e57c179ef2..7573b036bf 100644
> --- a/lib/eal/include/generic/rte_pflock.h
> +++ b/lib/eal/include/generic/rte_pflock.h
> @@ -121,9 +121,7 @@ rte_pflock_read_lock(rte_pflock_t *pf)
>                 return;
>
>         /* Wait for current write phase to complete. */
> -       while ((__atomic_load_n(&pf->rd.in, __ATOMIC_ACQUIRE)
> -               & RTE_PFLOCK_WBITS) == w)
> -               rte_pause();
> +       rte_wait_event(&pf->rd.in, RTE_PFLOCK_WBITS, ==, w, __ATOMIC_ACQUIRE);
>  }
>
>  /**
> --
> 2.25.1
>