From: Gavin Hu <gavin.hu@arm.com>
To: dev@dpdk.org
Cc: nd@arm.com, Gavin Hu <gavin.hu@arm.com>,
thomas@monjalon.net, jerin.jacob@caviumnetworks.com,
hemant.agrawal@nxp.com, Honnappa.Nagarahalli@arm.com,
bruce.richardson@intel.com
Subject: [dpdk-dev] [PATCH v3 1/2] ring: add reset api to flush the ring when not in use
Date: Wed, 12 Dec 2018 19:15:24 +0800 [thread overview]
Message-ID: <20181212111525.22996-2-gavin.hu@arm.com> (raw)
In-Reply-To: <20181212111525.22996-1-gavin.hu@arm.com>
Currently, the flush is done by dequeuing the ring in a while loop. It is
much simpler to flush the queue by resetting the head and tail indices.
Signed-off-by: Gavin Hu <gavin.hu@arm.com>
Reviewed-by: Ruifeng Wang <Ruifeng.Wang@arm.com>
Reviewed-by: Honnappa Nagarahalli <Honnappa.Nagarahalli@arm.com>
---
lib/librte_ring/rte_ring.h | 20 ++++++++++++++++++++
lib/librte_ring/rte_ring_version.map | 7 +++++++
2 files changed, 27 insertions(+)
diff --git a/lib/librte_ring/rte_ring.h b/lib/librte_ring/rte_ring.h
index af5444a9f..283030011 100644
--- a/lib/librte_ring/rte_ring.h
+++ b/lib/librte_ring/rte_ring.h
@@ -671,6 +671,26 @@ rte_ring_dequeue(struct rte_ring *r, void **obj_p)
}
/**
+ * Flush a ring.
+ *
+ * This function flush all the elements in a ring
+ *
+ * @b EXPERIMENTAL: this API may change without prior notice
+ *
+ * @warning
+ * Make sure the ring is not in use while calling this function.
+ *
+ * @param r
+ * A pointer to the ring structure.
+ */
+static inline void __rte_experimental
+rte_ring_reset(struct rte_ring *r)
+{
+ r->prod.head = r->cons.head = 0;
+ r->prod.tail = r->cons.tail = 0;
+}
+
+/**
* Return the number of entries in a ring.
*
* @param r
diff --git a/lib/librte_ring/rte_ring_version.map b/lib/librte_ring/rte_ring_version.map
index d935efd0d..581d9cabe 100644
--- a/lib/librte_ring/rte_ring_version.map
+++ b/lib/librte_ring/rte_ring_version.map
@@ -17,3 +17,10 @@ DPDK_2.2 {
rte_ring_free;
} DPDK_2.0;
+
+EXPERIMENTAL {
+ global:
+
+ rte_ring_reset;
+
+};
--
2.11.0
next prev parent reply other threads:[~2018-12-12 11:15 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-12-12 11:15 [dpdk-dev] [PATCH v3 0/2] add rte ring reset api and use it to flush a ring by hash Gavin Hu
2018-12-12 11:15 ` Gavin Hu [this message]
2018-12-12 11:15 ` [dpdk-dev] [PATCH v3 2/2] hash: flush the rings instead of dequeuing one by one Gavin Hu
2018-12-19 21:59 ` [dpdk-dev] [PATCH v3 0/2] add rte ring reset api and use it to flush a ring by hash Thomas Monjalon
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