samples: net: zperf: Add nRF7002DK support

Add settings to get peak throughputs for nRF7002DK, this relies on the
overlay-wifi-nm-hostap.conf.

Signed-off-by: Chaitanya Tata <Chaitanya.Tata@nordicsemi.no>

samples/net/zperf/README.rst

@@ -61,3 +61,9 @@ Usage
 
 See :ref:`zperf library documentation <zperf>` for more information about
 the library usage.
+
+Wi-Fi
+=====
+
+The IPv4 Wi-Fi support can be enabled in the sample with
+:ref:`Wi-Fi snippet <snippet-wifi-ipv4>`.

samples/net/zperf/boards/nrf7002dk_nrf5340_cpuapp.conf

@@ -0,0 +1,25 @@
+# Optimized networking settings for performance
+CONFIG_NET_PKT_RX_COUNT=28
+CONFIG_NET_PKT_TX_COUNT=27
+CONFIG_NET_BUF_RX_COUNT=28
+CONFIG_NET_BUF_TX_COUNT=54
+CONFIG_NET_BUF_DATA_SIZE=1100
+CONFIG_HEAP_MEM_POOL_SIZE=260000
+CONFIG_NRF70_MAX_TX_AGGREGATION=4
+CONFIG_NRF70_QSPI_LOW_POWER=n
+
+# For speed optimizations
+CONFIG_PICOLIBC_USE_MODULE=y
+
+# Consumes more memory
+CONFIG_WIFI_CREDENTIALS=n
+CONFIG_FLASH=n
+CONFIG_NVS=n
+CONFIG_SETTINGS=n
+
+# Debugging
+CONFIG_NRF70_UTIL=y
+CONFIG_SYS_HEAP_RUNTIME_STATS=y
+CONFIG_NET_STATISTICS=y
+CONFIG_NET_STATISTICS_WIFI=y
+CONFIG_NET_STATISTICS_USER_API=y

samples/net/zperf/sample.yaml

@@ -123,3 +123,8 @@ tests:
   sample.net.zperf.802154.subg:
     extra_args: EXTRA_CONF_FILE="overlay-802154-subg.conf"
     platform_allow: beagleconnect_freedom
+  sample.net.zperf.nrf7002dk:
+    extra_args: SNIPPET=wifi-ipv4
+    extra_configs:
+      - CONFIG_BUILD_ONLY_NO_BLOBS=y
+    platform_allow: nrf7002dk/nrf5340/cpuapp