[dpdk-dev] [PATCH 2/2] eventdev: add dropped count to Rx adapter stats

[Nikhil Rao <nikhil.rao@intel.com>]

The application can install a callback invoked by
the Rx adapter. The callback can drop packets and populate
a callback argument with the number of dropped packets.
Add a Rx adapter stats field to keep track of the total
number of dropped packets.

Signed-off-by: Nikhil Rao <nikhil.rao@intel.com>
---
 lib/librte_eventdev/rte_event_eth_rx_adapter.h | 2 ++
 lib/librte_eventdev/rte_event_eth_rx_adapter.c | 3 +++
 2 files changed, 5 insertions(+)

diff --git a/lib/librte_eventdev/rte_event_eth_rx_adapter.h b/lib/librte_eventdev/rte_event_eth_rx_adapter.h
index a64eed0..4ea5a53 100644
--- a/lib/librte_eventdev/rte_event_eth_rx_adapter.h
+++ b/lib/librte_eventdev/rte_event_eth_rx_adapter.h
@@ -197,6 +197,8 @@ struct rte_event_eth_rx_adapter_stats {
 	/**< Eventdev enqueue count */
 	uint64_t rx_enq_retry;
 	/**< Eventdev enqueue retry count */
+	uint64_t rx_dropped;
+	/**< Received packet dropped count */
 	uint64_t rx_enq_start_ts;
 	/**< Rx enqueue start timestamp */
 	uint64_t rx_enq_block_cycles;
diff --git a/lib/librte_eventdev/rte_event_eth_rx_adapter.c b/lib/librte_eventdev/rte_event_eth_rx_adapter.c
index ab4e3cf..4d41aa7 100644
--- a/lib/librte_eventdev/rte_event_eth_rx_adapter.c
+++ b/lib/librte_eventdev/rte_event_eth_rx_adapter.c
@@ -807,6 +807,7 @@ static uint16_t rxa_gcd_u16(uint16_t a, uint16_t b)
 
 	if (dev_info->cb_fn) {
 
+		dropped = 0;
 		nb_cb = dev_info->cb_fn(eth_dev_id,
 					rx_queue_id,
 					ETH_EVENT_BUFFER_SIZE,
@@ -820,6 +821,8 @@ static uint16_t rxa_gcd_u16(uint16_t a, uint16_t b)
 				nb_cb, num);
 		else
 			num = nb_cb;
+		if (dropped)
+			rx_adapter->stats.rx_dropped += dropped;
 	}
 
 	buf->count += num;
-- 
1.8.3.1