Wireshark I/O Graphs#

The Wireshark I/O graph displays the traffic present in a capture file, which is measured in bytes per second. The x-axis represents the time in seconds, and the y-axis represents the Bytes per second.

Steps to Trace an I/O Graph:

Open the required Wireshark capture and apply the filter like TCP or UDP.
Now click on Statistics→ I/O Graph menu or toolbar item.

Wireshark I/O Graph

If UDP_Rx capture is considered, the following graph conveys that the transfer rate of the UDP packets is ~16 Mbps per second.

UDP Tx#

UDP Tx – Wireshark I/O Graph

UDP Rx#

UDP Rx – Wireshark I/O Graph

TCP Tx#

TCP Tx – Wireshark I/O Graph

TCP Rx#

TCP Rx – Wireshark I/O Graph

TLS Tx#

TLS Tx – Wireshark I/O Graph

TLS Rx#

TLS Rx – Wireshark I/O Graph

All the throughput numbers mentioned below are with the SiWN917 NCP module using STM32F411RE as the host MCU and are for reference purposes only.

Note: Currently, we don’t have BRD8045C Adapter boards for STM32 host MCU. Please reach out to sales team for more information on board availability.

Test Configurations#

Device	BRD4346A
Memory Configuration	672K
Access Point used	Model: ASUS AC1900 Channel: 1 Security Mode: WPA2-PSK
Environment	Shield Room
Host	STM32 (F411RE)
Interface	SPI
Mode	Non-Bypass
Power Save	Disabled

Test Results#


S. No	Throughput Type	Test Tool	Throughput (Mbps)
1	UDP Tx	iPerf	22 Mbps
2	UDP Rx	iPerf	22 Mbps
3	TCP Tx	iPerf	20 Mbps
4	TCP Rx	iPerf	20 Mbps
5	TLS Tx	iPerf	20 Mbps
6	TLS Rx	iPerf	13 Mbps

Note: We also have a Throughput example with EFR32xG24 as the host MCU available in the SDK at\examples\featured\wlan_throughput. The throughput observed with EFR32xG24 host MCU are less compared to STM32F411RE host MCU.