PAC Arria 10 GX, reconfiguration not working on 1.2PV

[HKim27]

Hi, all.

I'm using a pac_a10 board and recently upgraded it to 1.2 production version.

Since then, reprogramming (partial reconfiguration) is not working.

Scenario here:

1. I programmed the device with hello_world example.

aocl program acl0 $OPAE_PLATFORM_ROOT/opencl/hello_world.aocx

1. I ran vector_add example.

cd exm_opencl_vector_add_x64_linux/vector_add make cp $OPAE_PLATFORM_ROOT/opencl/vector_add.aocx bin ./bin/host

1. What I expect is, although the device is programmed with hello_world.aocx, it will be reprogrammed with vector_add.aocx and run smoothly, like the following sample output from https://www.intel.com/content/altera-www/global/en_us/index/documentation/fvf1521490619217.html#nms1523294913946

Initializing OpenCL Platform: Intel(R) FPGA SDK for OpenCL(TM) Using 1 device(s) pac_a10 : PAC Arria 10 Platform (pac_a10_f200000) Using AOCX: vector_add.aocx Reprogramming device [0] with handle 1 Launching for device 0 (1000000 elements)   Time: 8.046 ms Kernel time (device 0): 3.711 ms   Verification: PASS

Instead, however, it fails with the following error.

Initializing OpenCL Platform: Intel(R) FPGA SDK for OpenCL(TM) Using 1 device(s) pac_a10 : PAC Arria 10 Platform (pac_a10_eb00000) Using AOCX: vector_add.aocx Context callback: Specified kernel was not built for any devices ERROR: CL_INVALID_KERNEL_NAME Location: host/src/main.cpp:169 Failed to create kernel Segmentation fault (core dumped)

1. If I program the device with vector_add.aocx and run vector_add example, it runs well. So, my guess is that reprogramming is not working.

Anybody has some idea on this?

[Nooraini_Y_Intel]

Hi,

Currently I am reviewing the forum for any open questions and found this thread. I apologize that no one seems to answer this question that you posted. Since it has been a while you posted this question, I'm wondering if you have found the answer? If not, please let me know, I will try to assign/find someone to assist you. Thank you.

Regards,

Nooraini

[HKim27]

@NYusof​ 

Thank you for your attention.

I have not found the answer yet, so assist will be great. :)

[JonWay_C_Intel]

Hi @HKim27​ 

Do you mean you configured the FPGA with hello_world.aocx, and then run the vector_add example (WITHOUT performing aocl program <device> vector_add.aocx)?

[HKim27]

yes thats right

[HKim27]

@JwChin​ 

Is there any update on this?

[JonWay_C_Intel]

Hi @HKim27​ 

Sorry i missed your reply. Thank you for following up.

Could you run the below steps:

Could you reboot your system?

Source init_env.sh

aocl install

program a hello_world.aocx to initialize the board

aocl diagnose (it should show the status as "Passed")

Then go back to performing: https://www.intel.com/content/altera-www/global/en_us/index/documentation/fvf1521490619217.html#nms1523294913946

make sure you have copied the vector_add.aocx into the "bin" folder

cp $OPAE_PLATFORM_ROOT/opencl/vector_add.aocx ./bin

Also, check if you have set your hugepages.

If this still fails, please confirm you meet the system requirement: https://www.intel.com/content/www/us/en/programmable/documentation/iyu1522005567196.html#oeh1528996494398

[HKim27]

@JwChin​ 

I finally found the solution. (after 8 month!!!)

Initialization script inside Intel Acceleration Stack Version 1.2 (inteldevstack/init_env.sh) has this line:

export CL_CONTEXT_COMPILER_MODE_INTELFPGA=3

According to the documentation, this environment variable prevent reconfiguration during OpenCL host execution.

By unsetting this, reconfiguration works well.