SK-AM62A-LP: Need expected command and throughput numbers for TCP and UDP

SAICHARAN TENEPALLI

Part Number: SK-AM62A-LP
Other Parts Discussed in Thread: CC3351, CC3551

Tool/software:

Hi Team,
I am planning to run UDP and TCP traffics after CC3351 WLAN associated with an AP. Please review my queries and let me know.

Could you please let me know -b (bandwidth) for UDP and -w (window size) for TCP?
Why application speed shows only 50Mbps? the link is giving Tx 73 and Rx is 86 Mbps
Is there any expected throughput numbers of TCP and UDP for Tx and Rx?

Using tool: IPERF3
SDK Ver:
root@am62axx-evm:/usr/share/cc33xx#uname -a
Linux am62axx-evm 6.6.58-ti-01497-ga7758da17c28-dirty #1 SMP PREEMPT Wed Nov 27 13:23:15 UTC 2024 aarch64 GNU/Linux
root@am62axx-evm:/usr/share/cc33xx# iw dev wlan0 link
Connected to 08:bf:b8:8f:64:a8 (on wlan0)
SSID: ASUS_GTAXE16000_2G
freq: 2437.0
RX: 867296160 bytes (4879924 packets)
TX: 2034052918 bytes (1358407 packets)
signal: -33 dBm
rx bitrate: 86.0 MBit/s HE-MCS 7 HE-NSS 1 HE-GI 0 HE-DCM 0
tx bitrate: 73.1 MBit/s HE-MCS 7 HE-NSS 1 HE-GI 2 HE-DCM 0
bss flags: short-slot-time
dtim period: 1
beacon int: 100

6 months ago

0 Pekka Varis 6 months ago

TI__Mastermind 27050 points

SAICHARAN TENEPALLI said:
Could you please let me know -b (bandwidth) for UDP

I don't understand the question. UDP is an unreliable protocol that will send any bandwidth you want. For basic UDP performance testing I'd recommend running iperf3.

SAICHARAN TENEPALLI said:
-w (window size) for TCP

In all modern systems by default window scaling is used, so the window size changes dynamically. This is not anything TI specific. You can configure this, see for example https://serverfault.com/questions/1039212/how-to-adjust-tcp-window-size?newreg=bd7ff87b566f495784084d005a145692 .

SAICHARAN TENEPALLI said:
Why application speed shows only 50Mbps? the link is giving Tx 73 and Rx is 86 Mbps

Achieving 50MBit/s application using IP networking at a real application level seems reasonable with the lower level driver reporting cahnnel bitrates in the 70-80 MBit/s range. Adding IP, UDP or TCP and

SAICHARAN TENEPALLI said:
Is there any expected throughput numbers of TCP and UDP for Tx and Rx?

I'm guessing this is referring to your specific setup with an M.2 card? Probably the weakest link will be the radio link from the CC3351 or the connection if SPI from the chipset to the processor. If you have it connected with SDIO will probably perform better. TCP and UDP with large packets will reach at least 1Gbit/s if the underlying physical layer supports that https://software-dl.ti.com/processor-sdk-linux/esd/AM62AX/latest/exports/docs/devices/AM62AX/linux/Linux_Performance_Guide.html#cpsw-cpsw2g-cpsw3g-ethernet-driver . I would suggest to isolate the radio channel by using a cable if you plan to test the limits of the non-radio side.

For example for this module https://www.bdecomm.com/en/show_info.asp?id=474 the statement is to expect up to 50 MBit/s throughput at the application level.

Pekka

0 SAICHARAN TENEPALLI 6 months ago in reply to Pekka Varis

Prodigy 20 points

Hi Pekka Varis,
Thanks for the response.

Pekka Varis said:
SAICHARAN TENEPALLI said:
Could you please let me know -b (bandwidth) for UDP

I don't understand the question. UDP is an unreliable protocol that will send any bandwidth you want. For basic UDP performance testing I'd recommend running iperf3.

I am using below commands to check the Tput after WLAN connected with Ax router on 2G-chan 6 + WPA2.
UDP:
iperf3 -s -p 5001 --> on Server side
iperf3 -c IP -p 5001 -u -b 50M --> Client side. --> Getting 1Mbps Tput without -b 50M

TCP:
iperf3 -s -p 5001 --> on Server side
iperf3 -c IP -p 5001 --> on Client side

Pekka Varis said:
SAICHARAN TENEPALLI said:
Is there any expected throughput numbers of TCP and UDP for Tx and Rx?

I'm guessing this is referring to your specific setup with an M.2 card? Probably the weakest link will be the radio link from the CC3551 or the connection if SPI from the chipset to the processor. If you have it connected with SDIO will probably perform better. TCP and UDP with large packets will reach at least 1Gbit/s if the underlying physical layer supports that https://software-dl.ti.com/processor-sdk-linux/esd/AM62AX/latest/exports/docs/devices/AM62AX/linux/Linux_Performance_Guide.html#cpsw-cpsw2g-cpsw3g-ethernet-driver . I would suggest to isolate the radio channel by using a cable if you plan to test the limits of the non-radio side.

Yes, I am using M.2 card (https://www.ti.com/lit/pdf/swau133) and in closed environment with conducted (RF wired). Actually, i am getting Low Rx Tput in both TCP and UDP. like

RSSI = -36dBm
TCP Tx: 41 Mbps
TCP Rx: 29 Mbps
UDP Tx: 49 Mbps (when i used -b 50M on client side)
UDP Rx: 35 Mbps

Are these Tput numbers expected?

Thanks,
SAI

0 Pekka Varis 6 months ago in reply to SAICHARAN TENEPALLI

TI__Mastermind 27050 points

SAICHARAN TENEPALLI said:
Are these Tput numbers expected?

They seem realistic, signal strength is strong so I don't think radio conditions will be limiting.

Pekka

0 SAICHARAN TENEPALLI 6 months ago in reply to Pekka Varis

Prodigy 20 points

Thanks for confirmation Pekka Varis.

SAI

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SK-AM62A-LP: Need expected command and throughput numbers for TCP and UDP