vcdbg is an application to help with debugging the VideoCore GPU from Linux running on the the ARM. It needs to be run as root. This application is mostly of use to Raspberry Pi engineers, although there are some commands that general users may find useful.
sudo vcdbg help will give a list of available commands.
Only options of use to end users have been described here.
Shows various items of version information from the VideoCore.
Dumps logs from the specified subsystem. Possible options are:
| log | Description |
|---|---|
| msg | Prints out the message log |
| assert | Prints out the assertion log |
| ex | Prints out the exception log |
| info | Prints out information from the logging headers |
| level | Sets the VCOS logging level for the specified category, n|e|w|i|t |
| list | List the VCOS logging levels |
e.g. To print out the current contents of the message log:
vcdbg log msg
List all memory allocations current in the VideoCore heap.
List the current status of the pool allocator
Without any further parameters, lists the current status of the relocatable allocator. Use sudo vcdbg reloc small to list small allocations as well.
Use the subcommand sudo vcdbg reloc stats to list statistics for the relocatable allocator.
Commands related to task history.
Use sudo vcdbg hist gnuplot to dump task history in gnuplot format to task.gpt and task.dat