[dpdk-dev] [PATCH] eventdev: configure the Rx event buffer size

[Ganapati Kundapura]

As of now Rx event buffer size is static and set to 128.

This patch sets the Rx event buffer size to 192, configurable
at compile time and also errors out at run time if Rx event
buffer size is configured more than 16 bits.

Signed-off-by: Ganapati Kundapura <ganapati.kundap...@intel.com>
---
 config/rte_config.h                     |  1 +
 lib/eventdev/rte_event_eth_rx_adapter.c | 14 +++++++++++++-
 2 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/config/rte_config.h b/config/rte_config.h
index 590903c..3d938c8 100644
--- a/config/rte_config.h
+++ b/config/rte_config.h
@@ -77,6 +77,7 @@
 #define RTE_EVENT_ETH_INTR_RING_SIZE 1024
 #define RTE_EVENT_CRYPTO_ADAPTER_MAX_INSTANCE 32
 #define RTE_EVENT_ETH_TX_ADAPTER_MAX_INSTANCE 32
+#define RTE_EVENT_ETH_RX_ADAPTER_BUFFER_SIZE 128
 
 /* rawdev defines */
 #define RTE_RAWDEV_MAX_DEVS 64
diff --git a/lib/eventdev/rte_event_eth_rx_adapter.c 
b/lib/eventdev/rte_event_eth_rx_adapter.c
index 13dfb28..0fe265e 100644
--- a/lib/eventdev/rte_event_eth_rx_adapter.c
+++ b/lib/eventdev/rte_event_eth_rx_adapter.c
@@ -25,7 +25,12 @@
 
 #define BATCH_SIZE             32
 #define BLOCK_CNT_THRESHOLD    10
-#define ETH_EVENT_BUFFER_SIZE  (4*BATCH_SIZE)
+
+#define ETH_EVENT_BUFFER_SIZE \
+               (RTE_EVENT_ETH_RX_ADAPTER_BUFFER_SIZE + BATCH_SIZE + BATCH_SIZE)
+
+#define MAX_ETH_EVENT_BUFFER_SIZE (USHRT_MAX - BATCH_SIZE - BATCH_SIZE)
+
 #define MAX_VECTOR_SIZE                1024
 #define MIN_VECTOR_SIZE                4
 #define MAX_VECTOR_NS          1E9
@@ -2165,6 +2170,13 @@ rte_event_eth_rx_adapter_create_ext(uint8_t id, uint8_t 
dev_id,
                return -EEXIST;
        }
 
+       if (RTE_DIM(rx_adapter->event_enqueue_buffer.events) > USHRT_MAX) {
+               RTE_EDEV_LOG_ERR("CONFIG_RTE_ADPTR_ETH_EVENT_BUFFER_SIZE is "
+                                "greater than max allowed value %u",
+                                MAX_ETH_EVENT_BUFFER_SIZE);
+               return -EINVAL;
+       }
+
        socket_id = rte_event_dev_socket_id(dev_id);
        snprintf(mem_name, ETH_RX_ADAPTER_MEM_NAME_LEN,
                "rte_event_eth_rx_adapter_%d",
-- 
2.6.4