-----Original Message-----
From: dev <redacted> On Behalf Of Naga Harish K S V
Sent: Tuesday, September 21, 2021 2:52 PM
To: Jerin Jacob Kollanukkaran <redacted>;
jay.jayatheerthan@intel.com
Cc: dev@dpdk.org
Subject: [EXT] [dpdk-dev] [PATCH v2 3/5] eventdev/rx_adapter:add per
queue event buffer configure support

External Email

----------------------------------------------------------------------
To configure per queue event buffer size, applications sets
``rte_event_eth_rx_adapter_params::use_queue_event_buf`` flag
as true and is passed to
``rte_event_eth_rx_adapter_create_with_params``
api.

The per queue event buffer size is populated  in
``rte_event_eth_rx_adapter_queue_conf::event_buf_size`` and
passed
to ``rte_event_eth_rx_adapter_queue_add`` api.

Signed-off-by: Naga Harish K S V <redacted>
---
.../prog_guide/event_ethernet_rx_adapter.rst  | 19 ++++++++++++---
----
lib/eventdev/rte_event_eth_rx_adapter.h       |  4 ++++
2 files changed, 16 insertions(+), 7 deletions(-)

diff --git a/doc/guides/prog_guide/event_ethernet_rx_adapter.rst

b/doc/guides/prog_guide/event_ethernet_rx_adapter.rst
index dd753613bd..333e6f8192 100644

--- a/doc/guides/prog_guide/event_ethernet_rx_adapter.rst
+++ b/doc/guides/prog_guide/event_ethernet_rx_adapter.rst

@@ -62,12 +62,14 @@ service function and needs to create an event

port for it. The callback is
expected to fill the ``struct rte_event_eth_rx_adapter_conf structure``
passed to it.

-If the application desires to control the event buffer size, it can use the
-``rte_event_eth_rx_adapter_create_with_params()`` api. The event
buffer size is
-specified using ``struct
rte_event_eth_rx_adapter_params::event_buf_size``.
-The function is passed the event device to be associated with the
adapter
-and port configuration for the adapter to setup an event port if the
-adapter needs to use a service function.
+If the application desires to control the event buffer size at adapter
level,
+it can use the ``rte_event_eth_rx_adapter_create_with_params()``
api. The event
+buffer size is specified using ``struct
rte_event_eth_rx_adapter_params::
+event_buf_size``. To configure the event buffer size at queue level,
the boolean
+flag ``struct
rte_event_eth_rx_adapter_params::use_queue_event_buf`` need to
be
+set to true. The function is passed the event device to be associated
with
+the adapter and port configuration for the adapter to setup an event
port
+if the adapter needs to use a service function.

Adding Rx Queues to the Adapter Instance
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

@@ -79,7 +81,9 @@ parameter. Event information for packets from this

Rx queue is encoded in the
``ev`` field of ``struct rte_event_eth_rx_adapter_queue_conf``. The
servicing_weight member of the struct
rte_event_eth_rx_adapter_queue_conf
is the relative polling frequency of the Rx queue and is applicable when
the
-adapter uses a service core function.
+adapter uses a service core function. The applications can configure
queue
+event buffer size in ``struct
rte_event_eth_rx_adapter_queue_conf::event_buf_size``
+parameter.

.. code-block:: c

@@ -90,6 +94,7 @@ adapter uses a service core function.
        queue_config.rx_queue_flags = 0;
        queue_config.ev = ev;
        queue_config.servicing_weight = 1;
+	queue_config.event_buf_size = 1024;

        err = rte_event_eth_rx_adapter_queue_add(id,
                                                eth_dev_id,

diff --git a/lib/eventdev/rte_event_eth_rx_adapter.h

b/lib/eventdev/rte_event_eth_rx_adapter.h
index a7881097b4..b9f0563244 100644

--- a/lib/eventdev/rte_event_eth_rx_adapter.h
+++ b/lib/eventdev/rte_event_eth_rx_adapter.h

@@ -199,6 +199,8 @@ struct rte_event_eth_rx_adapter_queue_conf {

	 * Valid when
RTE_EVENT_ETH_RX_ADAPTER_QUEUE_EVENT_VECTOR flag is set in
	 * @see
rte_event_eth_rx_adapter_queue_conf::rx_queue_flags.
	 */
+	uint16_t event_buf_size;
+	/**< event buffer size for this queue */
};

/**

@@ -265,6 +267,8 @@ struct rte_event_eth_rx_adapter_params {

	/**< size of event buffer for the adapter.
	 * the size is aligned to BATCH_SIZE and added (2 * BATCH_SIZE)
	 */
+	bool use_queue_event_buf;
+	/**< flag to indicate that event buffer is separate for each
queue */
};

/**
--
2.25.1