Introduction

The PCIe benchmark (EP) example benchmarks the buffer transfer speed between RC and EP device.

The RC device sends a 4MB buffer to the EP device. The EP device waits for the buffer to receive and acknowledges the reception of buffer by sending a legacy IRQ to the RC device. This is repeated multiple times using CPU transfer and UDMA and benchmarking is done from RC device.

Supported Combinations

Parameter	Value
CPU + OS	r5fss0-0_freertos
Toolchain	ti-arm-clang
Board	am243x-evm
Example folder	examples/drivers/pcie/pcie_benchmark/pcie_benchmark_ep

Steps to Run the Example

Build the example

When using CCS projects to build, import the CCS project for the required combination and build it using the CCS project menu (see Using SDK with CCS Projects).
When using makefiles to build, note the required combination and build using make command (see Using SDK with Makefiles)

HW Setup

Note: Make sure you have setup the EVM with cable connections as shown here, EVM Setup. In addition do below steps.

AM243-EVM

For connecting two board in RC and EP mode a specialized cable as below is required
This cable can be obtained from Adex Electronics (https://www.adexelec.com).
Modify the cable to remove resistors in CK+ and CK- in order to avoid ground loops (power) and smoking clock drivers (clk+/-).
The ends of the modified cable should look like below:
- A side
  
  PCIe cable A side end 1
  
  PCIe cable A side end 2
- B side
  
  PCIe cable B side end 1
  
  PCIe cable B side end 2

Run the example

Launch a CCS debug session and run the example executable, see CCS Launch, Load and Run
Run the PCIE Benchmark RC example on the other connected board
You will see logs in the UART terminal as shown in the next section.

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