TDA4VM: Throughput of Ethernet ports

Kuerbis

Expert 4145 points

Part Number: TDA4VM

Hi Team,

When we use five ports of a wired LAN, What is throughput for each Ethernet ports?

If you don't have actual measurements, the calculated values are Ok. . Please tell me.

In the data sheet

– up to eight 2.5Gb SGMII

– up to eight RMII (10/100) or RGMII (10/100/1000)

– up to two QSGMII

Is it possible that SGMII and RGMII can be behaved as fast as 1 GHz on all 8 ports?

I am concerned that using a lot of ports will reduce throughput.

Thanks and Best regards,

Kuerbis

over 5 years ago

0 Dave Bell over 5 years ago

TI__Genius 14680 points

Kuerbis,

You have a correct summary of the available port configurations on the switch. The CPSW9G, and the associated chip architecture, is designed to support line-rate port-to-port switching as well as high-throughput host termination.

For the port-to-port switching, this is accommodated within the CPSW itself, without relying on internal DMA or CPU resources.

For host termination, the architecture does support the bandwidth required across the link configurations. Actual speeds that will be achievable in-system will be a function of the CPU loading and DMA sharing with other high-bandwidth peripherals that use resources, and may involve tradeoffs depending on your product requirements to maximize bandwidth and CPU loading. We don't yet have a software test framework set up to demonstrate multi-link termination profiling data, but this will come in the future.

Best regards,

Dave

0 Kuerbis over 5 years ago in reply to Dave Bell

TI__Expert 4145 points

Hi Dave,

Thanks!

Best regards,

Kuerbis

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TDA4VM: Throughput of Ethernet ports