Ethernet Performance

Table of Contents

• Introduction
• Setup Details
• Layer 2 Performance
  • Configuration Details
  • Layer 2 Latency
• 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	R5F
Core Operating Speed	800 MHz
Memory Type	MSRAM
Cache status	Enabled
EVM Type	AM243x-LP E3 / AM64X-EVM

SOC Details	Values
Core	A53
Core Operating Speed	1 GHz
Memory Type	DDR
Cache status	Enabled
EVM Type	AM64X-EVM

Layer 2 Performance

Latency defination

Configuration Details

Configuration	Value
Processing Core	Main R5F0 Core 0
Core Frequency	800 MHz
Ethernet Interface Type	RGMII at 1 Gbps
Packet buffer memory	MSRAM
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

Configuration	Value
Processing Core	Main A53S0 Core 0
Core Frequency	1 MGz
Ethernet Interface Type	RGMII at 1 Gbps
Packet buffer memory	DDR (uncached)
Scatter-gather TX	Yes
Scatter-gather RX	Yes
UDMA interrupt pacing	NO (UDMA is polled)
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

Layer 2 Latency

Parameter	CPU<->CPSW Latency Value (ns)	PHY Latency (from datasheet) in ns	Total Latency (ns)
RX Latency	14000	193	14193
TX Latency	7000	384	7384

TCP/IP Performance

Configuration Details

Configuration	Value
Processing Core	Main R5F0 Core 0
Core Frequency	800 MHz
Ethernet Interface Type	RGMII at 1 Gbps
Packet buffer memory	MSRAM (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 STABLE-2_2_0_RELEASE
Host PC tool version	iperf v2.0.10
Number of Rx packet buffers	32
Number of Tx packet buffers	16

Configuration	Value
Processing Core	Main A53S0 Core 0
Core Frequency	1 GHz
Ethernet Interface Type	RGMII at 1 Gbps
Packet buffer memory	DDR
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 STABLE-2_2_0_RELEASE
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	93	34
TCP TX	93	34
TCP Bidirectional	RX=93 TX=93	63

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 = 64B			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 (%)	Bandwidth (Mbps)	CPU Load (%)	Packet Loss (%)
UDP RX	5	25	0.0	5	7	0.0	25	18	0.0	50	16	0.0
	10	36	22	15	19	0.0	50	34	0.1	65	21	0.0
	15	36	48	25	31	0	65	42	4.6	95	68	0.0
UDP RX (Max)	7	32	0.8	32	37	0.9	61	41	0.8	110	78	2.4
UDP TX (Max)	40	100	0.0	90	100	0.0	161	100	0.0	535	100	0.0

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 -l256 -b <bw> -r
  where <bw> is 25M, 50M, 100M, etc
  
• Test with datagram length of 512B:
  $iperf -c <evm_ip> -u -l512 -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