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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, Honnappa.Nagarahalli@arm.com,
	gavin.hu@arm.com, olivier.matz@6wind.com,
	bruce.richardson@intel.com
Subject: [dpdk-dev] [PATCH v6 2/3] ring: add reset API to flush the ring when not in use
Date: Wed,  9 Jan 2019 19:31:41 +0800	[thread overview]
Message-ID: <1547033502-3167-3-git-send-email-gavin.hu@arm.com> (raw)
In-Reply-To: <1547033502-3167-1-git-send-email-gavin.hu@arm.com>
In-Reply-To: <1546483094-29712-2-git-send-email-gavin.hu@arm.com>

From: Gavin Hu <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 af5444a..2830300 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 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	other threads:[~2019-01-09 11:32 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-01-02  0:55 [dpdk-dev] [PATCH v4 0/3] add rte ring reset api and use it to flush a ring by hash Gavin Hu
2019-01-02  0:55 ` [dpdk-dev] [PATCH v4 1/3] test/ring: ring perf test case enhancement Gavin Hu
2019-01-02 12:49   ` Thomas Monjalon
2019-01-03  2:40     ` Gavin Hu (Arm Technology China)
2019-01-02  0:55 ` [dpdk-dev] [PATCH v4 2/3] ring: add reset api to flush the ring when not in use Gavin Hu
2019-01-02  0:55 ` [dpdk-dev] [PATCH v4 3/3] hash: flush the rings instead of dequeuing one by one Gavin Hu
2019-01-02 12:50 ` [dpdk-dev] [PATCH v4 0/3] add rte ring reset api and use it to flush a ring by hash Thomas Monjalon
2019-01-02 18:40   ` Honnappa Nagarahalli
2019-01-03  2:43     ` Gavin Hu (Arm Technology China)
2019-01-03  2:38 ` [dpdk-dev] [PATCH v5 0/3] ring test enhancement and new ring reset api and use it " gavin hu
2019-01-03  2:38   ` [dpdk-dev] [PATCH v5 1/3] test/ring: ring perf test case enhancement gavin hu
2019-01-03  7:39     ` Thomas Monjalon
2019-01-03  8:22       ` Gavin Hu (Arm Technology China)
2019-01-09 11:31     ` [dpdk-dev] [PATCH v6 0/3] ring test enhancement and new ring reset api and use it by hash gavin hu
2019-01-09 11:31     ` [dpdk-dev] [PATCH v6 1/3] test/ring: ring perf test case enhancement gavin hu
2019-09-09  5:19       ` [dpdk-dev] [PATCH v7] " Joyce Kong
2019-10-08  8:07         ` Olivier Matz
2019-10-24  7:56           ` David Marchand
2019-01-09 11:31     ` gavin hu [this message]
2019-01-09 11:31     ` [dpdk-dev] [PATCH v6 3/3] hash: flush the rings instead of dequeuing one by one gavin hu
2019-01-09 18:53       ` Wang, Yipeng1
2019-01-03  2:38   ` [dpdk-dev] [PATCH v5 2/3] ring: add reset API to flush the ring when not in use gavin hu
2019-01-03  2:38   ` [dpdk-dev] [PATCH v5 3/3] hash: flush the rings instead of dequeuing one by one gavin hu

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