From 388bee69a5465d2401ea0054461c190160528e32 Mon Sep 17 00:00:00 2001 From: Feifei Wang Date: Mon, 1 Nov 2021 14:00:06 +0800 Subject: [PATCH] bpf: use wait until scheme for Rx/Tx iteration Instead of polling for cbi->use to be updated, use wait until scheme. Signed-off-by: Feifei Wang Reviewed-by: Ruifeng Wang Acked-by: Konstantin Ananyev --- 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..08eebd99b3 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_UNTIL_MASKED((uint32_t *)(uintptr_t)&cbi->use, + UINT32_MAX, !=, puse, __ATOMIC_RELAXED); } } -- 2.39.5