Windows 7 Professional 64-bit
Service Pack 1
VDSP Product version: 184.108.40.206, IDDE Ver 220.127.116.11 (July 5, 2011).
I read about the PGO linker in this article:
I have a project group consisting of several projects. One project is the start-up project and the other projects are library projects.
I have run profile guided optimization on one of the library projects in a simulator (a software audio codec). I then used the .pgo file to optimize that library project.
Now I want to make sure that code and data is placed in an optimal way, and that's when I stumbled into the above mentioned note about the PGO linker. How do I use the PGO linker to make sure that the code and data in the library project is placed optimally in memory ?
The code in the project group normally runs on a hardware board. One of the projects in the project group is a proprietary RTOS. The project that I want to optimize is used by some of the other projects in the project group when audio has to be encoded/decoded.
I followed these instructions in the EE-note, but I couldn't get it to work. It also seems that the instructions are outdated ?? I uploaded the DXE to H/W and ran the code for a while and then I manually halted the CPU and proceeded to step 5. I'm not sure if the PGO linker can only be used for code running in a simulator??
1. Load the program in VisualDSP++.
2. Choose Tools->Profiler to open the
Profiler window. (Not present in my version of VDSP. Why?)
3. Run the program with a sample input data
set. (Does this mean that the DXE has to be executed in a simulator???)
4. Wait until the program halts or is halted
manually. (I halted it manually)
5. Open a Windows Command Prompt window. (OK)
6. Execute the PGO Linker utility with the
appropriate command-line arguments
(Listing 1). The tool produces an .asm file. (Tool hangs)
7. Include the generated .asm file in the project.
8. Rebuild the project.
Here's the console output:
C:\Program Files (x86)\Analog Devices\VisualDSP 5.0>PGOLinker.exe "C:\code\program.dxe" "program.asm"
The command line options are configured as follows:-
DSP Executable --> C:\code\program.dxe
Linker directive Map File --> program.asm
Minimum L1 size selected --> 4
Maximum L1 size selected --> 80
L1 memory incremented in steps of --> 4
Algorithm Selected--> O2
Connecting to the IDDE and loading Program
This application has requested the Runtime to terminate it in an unusual way.
Please contact the application's support team for more information.