[dpdk-dev] [PATCH v8 5/5] lib/distributor: use wait event scheme
From: Feifei Wang <hidden>
Date: 2021-10-29 08:21:02
Subsystem:
library code, the rest · Maintainers:
Andrew Morton, Linus Torvalds
Instead of polling for bufptr64 to be updated, use wait event for this case. Signed-off-by: Feifei Wang <redacted> Reviewed-by: Ruifeng Wang <redacted> --- lib/distributor/rte_distributor_single.c | 10 ++++------ 1 file changed, 4 insertions(+), 6 deletions(-)
diff --git a/lib/distributor/rte_distributor_single.c b/lib/distributor/rte_distributor_single.c
index f4725b1d0b..d52b24a453 100644
--- a/lib/distributor/rte_distributor_single.c
+++ b/lib/distributor/rte_distributor_single.c@@ -33,9 +33,8 @@ rte_distributor_request_pkt_single(struct rte_distributor_single *d, union rte_distributor_buffer_single *buf = &d->bufs[worker_id]; int64_t req = (((int64_t)(uintptr_t)oldpkt) << RTE_DISTRIB_FLAG_BITS) | RTE_DISTRIB_GET_BUF; - while (unlikely(__atomic_load_n(&buf->bufptr64, __ATOMIC_RELAXED) - & RTE_DISTRIB_FLAGS_MASK)) - rte_pause(); + rte_wait_event(&buf->bufptr64, RTE_DISTRIB_FLAGS_MASK, + !=, 0, __ATOMIC_RELAXED); /* Sync with distributor on GET_BUF flag. */ __atomic_store_n(&(buf->bufptr64), req, __ATOMIC_RELEASE);
@@ -74,9 +73,8 @@ rte_distributor_return_pkt_single(struct rte_distributor_single *d, union rte_distributor_buffer_single *buf = &d->bufs[worker_id]; uint64_t req = (((int64_t)(uintptr_t)oldpkt) << RTE_DISTRIB_FLAG_BITS) | RTE_DISTRIB_RETURN_BUF; - while (unlikely(__atomic_load_n(&buf->bufptr64, __ATOMIC_RELAXED) - & RTE_DISTRIB_FLAGS_MASK)) - rte_pause(); + rte_wait_event(&buf->bufptr64, RTE_DISTRIB_FLAGS_MASK, + !=, 0, __ATOMIC_RELAXED); /* Sync with distributor on RETURN_BUF flag. */ __atomic_store_n(&(buf->bufptr64), req, __ATOMIC_RELEASE);
--
2.25.1