diff --git a/examples/ethernet/iperf/sdkconfig.defaults b/examples/ethernet/iperf/sdkconfig.defaults
index ac3bc061a40..d04d2474f4c 100644
--- a/examples/ethernet/iperf/sdkconfig.defaults
+++ b/examples/ethernet/iperf/sdkconfig.defaults
@@ -11,6 +11,8 @@ CONFIG_PARTITION_TABLE_FILENAME="partitions_example.csv"
 CONFIG_FREERTOS_USE_TRACE_FACILITY=y
 CONFIG_FREERTOS_USE_STATS_FORMATTING_FUNCTIONS=y
 
+CONFIG_FREERTOS_IN_IRAM=y
+
 # --------------------------------
 # Performance optimization options
 # --------------------------------
diff --git a/examples/wifi/iperf/sdkconfig.defaults b/examples/wifi/iperf/sdkconfig.defaults
index 6296ca93314..e16dfaf25e4 100644
--- a/examples/wifi/iperf/sdkconfig.defaults
+++ b/examples/wifi/iperf/sdkconfig.defaults
@@ -2,6 +2,7 @@ CONFIG_ESP_SYSTEM_EVENT_TASK_STACK_SIZE=4096
 
 CONFIG_FREERTOS_UNICORE=n
 CONFIG_FREERTOS_HZ=1000
+CONFIG_FREERTOS_IN_IRAM=y
 
 CONFIG_ESP_INT_WDT=n
 CONFIG_ESP_TASK_WDT_EN=n