Debugging - XAPP1372

Hardware Environment Setup

1. Some PCs might require Above 4G Memory Assignment and Resizable BAR Support to be set in the BIOS Configuration tab.
   
   
2. Build the VCK190 project (refer to the readme.txt file in the reference design to build the VCK190 project). Download the PDI file through the Vivado hardware manager and check the PCIe link status.
   
   
3. On the host side, use the lspci command to get the BAR address. Then use the devmem command to try to read and write the BAR spaces successfully.

Software Debugging

To compile the host application, select a directory and launch the application source code to this directory. Then compile the application by running the Makefile on an X86 host.

> make

Three objects are generated, as shown in the following table.

Then run the executable files on the host. The following figure shows the log for the programming and verification of the 128 MB flash.

The following figure shows the log from programming the 128 MB flash.

Performance

Programming the 128 MB image takes 193 seconds, which is 3 minutes 13 seconds. Comparing the two sets of performance results shown in the following table, it can be determined that there is a linear relation between time and programming size. For example, 48s x 4 = 192s, which is almost 193s.

Thus, 128 MB flash programming takes four times as long as 32 MB flash programming.

Programming + verify takes more time during this process. It is obvious that the verify time increases in a linear manner with the programming size.