-.. BSD LICENSE
- Copyright(c) 2015 Intel Corporation. All rights reserved.
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- distribution.
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- from this software without specific prior written permission.
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-
+.. SPDX-License-Identifier: BSD-3-Clause
+ Copyright(c) 2015 Intel Corporation.
RX/TX Callbacks Sample Application
==================================
packets to add a timestamp. A separate callback is applied to all packets
prior to transmission to calculate the elapsed time, in CPU cycles.
+If hardware timestamping is supported by the NIC, the sample application will
+also display the average latency since the packet was timestamped in hardware,
+on top of the latency since the packet was received and processed by the RX
+callback.
Compiling the Application
-------------------------
Running the Application
-----------------------
-To run the example in a ``linuxapp`` environment:
+To run the example in a ``linux`` environment:
.. code-block:: console
- ./build/rxtx_callbacks -l 1 -n 4
+ ./build/rxtx_callbacks -l 1 -n 4 -- [-t]
+
+Use -t to enable hardware timestamping. If not supported by the NIC, an error
+will be displayed.
Refer to *DPDK Getting Started Guide* for general information on running
applications and the Environment Abstraction Layer (EAL) options.
{
struct rte_eth_conf port_conf = port_conf_default;
const uint16_t rx_rings = 1, tx_rings = 1;
- struct ether_addr addr;
+ struct rte_ether_addr addr;
int retval;
uint16_t q;
- if (port >= rte_eth_dev_count())
- return -1;
-
/* Configure the Ethernet device. */
retval = rte_eth_dev_configure(port, rx_rings, tx_rings, &port_conf);
if (retval != 0)