Ethernet Performance

Table of Contents

• Introduction
• Setup Details
• Layer 2 Performance
  • Configuration Details
• TCP/IP Performance
  • Configuration Details
    • TCP Throughput
    • UDP Throughput
• See Also

Introduction

This section provides the performance numbers of Ethernet drivers using CPSW peripheral in MCU+ SDK

Setup Details

SOC Details	Values
Core	A53
Core Operating Speed	1 GHz
Memory Type	DDR
Cache status	Enabled
EVM Type	AM62x-SK

Layer 2 Performance

Latency defination

Configuration Details

Configuration	Value
Processing Core	Main A53 Core 0
Core Frequency	1 GHz
Ethernet Interface Type	RGMII at 1 Gbps
Packet buffer memory	DDR (uncached)
Scatter-gather TX	Yes
Scatter-gather RX	Yes
UDMA interrupt pacing	NO
RTOS	FreeRTOS
RTOS application	Modified Enet CPSW Loopback Example example
Host PC tool version	nload
Rx packet length	200 B
Tx packet length	200 B

TCP/IP Performance

Configuration Details

Configuration	Value
Processing Core	Main A53Core 0
Core Frequency	1 GHz
Ethernet Interface Type	RGMII at 1 Gbps
Packet buffer memory	DDR (cached)
Hardware checksum offload	Enabled on both Tx and Rx Side
Scatter-gather TX	Yes
Scatter-gather RX	Yes
UDMA interrupt pacing	Yes (realized with timer based interrupt pacing)
RTOS	FreeRTOS
RTOS application	Enet Lwip CPSW Example in examples
TCP/IP stack	LwIP version 2.12.2
Host PC tool version	iperf v2.0.10
Number of Rx packet buffers	32
Number of Tx packet buffers	16

TCP Throughput

Test	Bandwidth (Mbps)	CPU Load (%)
TCP RX	77	12
TCP TX	76.5	16
TCP Bidirectional	RX=51.4 TX=50	22

Host PC commands:

• TCP Rx and Tx (Sequential):
  $iperf -c <evm_ip> -r
  
• TCP Rx and Tx (Bidirectional):
  $iperf -c <evm_ip> -d
  

UDP Throughput

Test	Datagram Length = 256B			Datagram Length = 512B			Datagram Length = 1470B
	Bandwidth (Mbps)	CPU Load (%)	Packet Loss (%)	Bandwidth (Mbps)	CPU Load (%)	Packet Loss (%)	Bandwidth (Mbps)	CPU Load (%)	Packet Loss (%)
UDP RX	25	19	11	25	10	11	25	5	51
	50	36.26	11	50	20	11	50	9	52
UDP RX (Max)	100	69.6	12	100	39	11	100	16	53
UDP TX (Max)	25	100	0.0	50	100	0.0	100	100	0.0025

Host PC commands:

• Test with datagram length of 64B:
  $iperf -c <evm_ip> -u -l64 -b <bw> -r
  where <bw> is 5M, 10M, 15M, etc
  
• Test with datagram length of 256B:
  $iperf -c <evm_ip> -u -l 256 -b <bw> -r
  where <bw> is 25M, 50M, 100M, etc
  
• Test with datagram length of 512B:
  $iperf -c <evm_ip> -u -l 512 -b <bw> -r
  where <bw> is 25M, 50M, 100M, etc
  
• Test with datagram length of 1470B (max):
  $iperf -c <evm_ip> -u -b <bw> -r
  where <bw> is 25M, 50M, 100M, etc
  

See Also

Ethernet And Networking Enet Lwip CPSW Example