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From: Gavin Hu <gavin.hu@arm.com>
To: dev@dpdk.org
Cc: nd@arm.com, thomas@monjalon.net, jerinj@marvell.com,
	hemant.agrawal@nxp.com, nipun.gupta@nxp.com,
	Honnappa.Nagarahalli@arm.com, gavin.hu@arm.com,
	i.maximets@samsung.com, olivier.matz@6wind.com, stable@dpdk.org
Subject: [dpdk-dev] [PATCH v9 1/2] ring: add reset API to flush the ring when not in use
Date: Fri, 12 Jul 2019 23:54:36 +0800
Message-ID: <1562946877-50963-2-git-send-email-gavin.hu@arm.com> (raw)
In-Reply-To: <20181212062404.30243-1-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.

Fixes: af75078fece3 ("first public release")
Cc: stable@dpdk.org

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.c           |  7 +++++++
 lib/librte_ring/rte_ring.h           | 17 +++++++++++++++++
 lib/librte_ring/rte_ring_version.map |  7 +++++++
 3 files changed, 31 insertions(+)

diff --git a/lib/librte_ring/rte_ring.c b/lib/librte_ring/rte_ring.c
index b30b2aa..d9b3080 100644
--- a/lib/librte_ring/rte_ring.c
+++ b/lib/librte_ring/rte_ring.c
@@ -63,6 +63,13 @@ rte_ring_get_memsize(unsigned count)
 	return sz;
 }
 
+void
+rte_ring_reset(struct rte_ring *r)
+{
+	r->prod.head = r->cons.head = 0;
+	r->prod.tail = r->cons.tail = 0;
+}
+
 int
 rte_ring_init(struct rte_ring *r, const char *name, unsigned count,
 	unsigned flags)
diff --git a/lib/librte_ring/rte_ring.h b/lib/librte_ring/rte_ring.h
index e5a175c..2a9f768 100644
--- a/lib/librte_ring/rte_ring.h
+++ b/lib/librte_ring/rte_ring.h
@@ -669,6 +669,23 @@ 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.
+ */
+__rte_experimental
+void
+rte_ring_reset(struct rte_ring *r);
+
+/**
  * 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 d935efd..581d9ca 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;
+
+};
-- 
2.7.4


  parent reply index

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-12-12  6:24 [PATCH v1 0/2] add rte_ring_reset and use it to flush a ring Gavin Hu
2018-12-12  6:24 ` [PATCH v1 1/2] ring: add rte_ring_reset api to flush the ring Gavin Hu
2018-12-12  6:24 ` [PATCH v1 2/2] hash: flush the rings instead of dequeuing one by one Gavin Hu
2018-12-12  6:47 ` [PATCH v2 0/2] add rte ring reset api and use it to flush a ring by hash Gavin Hu
2018-12-12  6:47   ` [PATCH v2 1/2] ring: add reset api to flush the ring when not in use Gavin Hu
2018-12-12  6:47   ` [PATCH v2 2/2] hash: flush the rings instead of dequeuing one by one Gavin Hu
2018-12-12 10:15     ` Bruce Richardson
2018-12-12 19:28     ` Mattias Rönnblom
2019-03-15  3:31 ` [PATCH v7 0/2] new ring reset api and use it by hash Gavin Hu
2019-03-15  3:31 ` [PATCH v7 1/2] ring: add reset API to flush the ring when not in use Gavin Hu
2019-03-29 14:17   ` Olivier Matz
2019-07-04 14:42     ` [dpdk-dev] " Thomas Monjalon
2019-07-12  9:32       ` Gavin Hu (Arm Technology China)
2019-07-12  9:53         ` Olivier Matz
2019-07-12 11:06           ` Gavin Hu (Arm Technology China)
2019-07-12 11:48             ` Olivier Matz
2019-07-12 15:07               ` Gavin Hu (Arm Technology China)
2019-07-12 15:40                 ` Honnappa Nagarahalli
2019-07-12 16:01                   ` Gavin Hu (Arm Technology China)
2019-03-15  3:31 ` [PATCH v7 2/2] hash: flush the rings instead of dequeuing one by one Gavin Hu
2019-07-12  9:26 ` [dpdk-dev] [PATCH v8 0/2] new ring reset api and use it by hash Gavin Hu
2019-07-12  9:26 ` [dpdk-dev] [PATCH v8 1/2] ring: add reset API to flush the ring when not in use Gavin Hu
2019-07-12  9:26 ` [dpdk-dev] [PATCH v8 2/2] hash: flush the rings instead of dequeuing one by one Gavin Hu
2019-07-12 15:54 ` [dpdk-dev] [PATCH v9 0/2] new ring reset api and use it by hash Gavin Hu
2019-07-12 15:54 ` Gavin Hu [this message]
2019-07-12 15:54 ` [dpdk-dev] [PATCH v9 2/2] hash: flush the rings instead of dequeuing one by one Gavin Hu

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