> Instead of polling for cbi->use to be updated, use wait event scheme.
>
> Signed-off-by: Feifei Wang <feifei.wa...@arm.com>
> Reviewed-by: Ruifeng Wang <ruifeng.w...@arm.com>
> ---
> lib/bpf/bpf_pkt.c | 9 +++------
> 1 file changed, 3 insertions(+), 6 deletions(-)
>
> diff --git a/lib/bpf/bpf_pkt.c b/lib/bpf/bpf_pkt.c
> index 6e8248f0d6..c8a1cd1eb8 100644
> --- a/lib/bpf/bpf_pkt.c
> +++ b/lib/bpf/bpf_pkt.c
> @@ -113,7 +113,7 @@ bpf_eth_cbi_unuse(struct bpf_eth_cbi *cbi)
> static void
> bpf_eth_cbi_wait(const struct bpf_eth_cbi *cbi)
> {
> - uint32_t nuse, puse;
> + uint32_t puse;
>
> /* make sure all previous loads and stores are completed */
> rte_smp_mb();
> @@ -122,11 +122,8 @@ bpf_eth_cbi_wait(const struct bpf_eth_cbi *cbi)
>
> /* in use, busy wait till current RX/TX iteration is finished */
> if ((puse & BPF_ETH_CBI_INUSE) != 0) {
> - do {
> - rte_pause();
> - rte_compiler_barrier();
> - nuse = cbi->use;
> - } while (nuse == puse);
> + rte_wait_event((uint32_t *)(uintptr_t)&cbi->use, UINT32_MAX,
> + ==, puse, __ATOMIC_RELAXED);
> }
> }
>
> --
Acked-by: Konstantin Ananyev <konstantin.anan...@intel.com>
> 2.25.1
