This section provides the performance numbers of Ethernet drivers using CPSW peripheral in MCU+ SDK
| SOC Details | Values |
|---|---|
| Core | R5F |
| Core Operating Speed | 400 MHz |
| Memory Type | MSS L2 RAM |
| Cache status | Enabled |
| Configuration | Value |
|---|---|
| Processing Core | Main R5F0 Core 0 |
| Core Frequency | 400 MHz |
| Ethernet Interface Type | RGMII at 100 mbps |
| Packet buffer memory | MSS L2 RAM (un-cached) |
| Scatter-gather TX | Yes |
| Scatter-gather RX | Yes |
| CPDMA interrupt pacing | Yes |
| 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 |
| Parameter | CPU<->CPSW Latency Value (ns) | PHY latency (from datasheet) in ns | Total Latency (ns) |
| RX Latency | 4000 | 193 | 4193 |
| TX Latency | 14000 | 384 | 14384 |
| Test | Bandwidth (Mbps) | CPU Load (%) | Packet Size (bytes) |
| Layer 2 Transmission | 950 | 24 | 1500 |
| Configuration | Value |
|---|---|
| Processing Core | Main R5F0 Core 0 |
| Core Frequency | 400 MHz |
| Ethernet Interface Type | RGMII at 100 Mbps |
| Packet buffer memory | MSS L2 RAM (cached) |
| Hardware checksum offload | Disabled on Tx side Disabled on Rx Side |
| Scatter-gather TX | Yes |
| Scatter-gather RX | Yes |
| CPDMA interrupt pacing | Yes |
| RTOS | FreeRTOS |
| RTOS application | Enet Lwip CPSW Example example |
| 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 |
| Test | Bandwidth (Mbps) | CPU Load (%) |
| TCP RX | 95 | 74.7 |
| TCP TX | 95 | 79.5 |
| TCP Bidirectional | RX=63 TX=63 | 100 |
Host PC commands:
iperf -c <evm_ip> -riperf -c <evm_ip> -d| 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 | 99 | 0.0 | 25 | 56 | 0.0 | 25 | 25 | 0.0 |
| 50 | 100 | 64 | 50 | 100 | 3.4 | 50 | 46 | 0.0 | |
| 96 | 100 | 80 | 96 | 100 | 100 | 96 | 81 | 0.0 | |
| UDP RX (Max) | Not Tested | - | - | Not Tested | - | - | 96 | 81 | 0.0 |
| UDP TX (Max) | Not Tested | - | - | Not Tested | - | - | 95.7 | 55 | 0.0 |
Host PC commands:
iperf -c <evm_ip> -u -l64 -b<bw> -riperf -c <evm_ip> -u -l256 -b<bw> -riperf -c <evm_ip> -u -l512 -b<bw> -riperf -c <evm_ip> -u -b<bw> -r