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feat(ldpc_cl): Remove ldpc_cl

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This commit is contained in:
Romain Beurdouche
2025-08-11 08:38:06 +00:00
parent a2c03f26e9
commit b9bed5838e
4 changed files with 0 additions and 897 deletions
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openair1/PHY/CODING/DOC/LDPCImplementation.md
-44
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@@ -107,40 +107,6 @@ loading `libldpc_orig.so` instead of `libldpc.so`:
./nr-softmodem -O libconfig:gnb.band78.tm1.106PRB.usrpx300.conf:dbgl5 --loader.ldpc.shlibversion _orig
```
loading `libldpc_cl.so` instead of `libldpc.so`:
`make ldpc_cl`
This command creates the `libldpc_cl.so` shared library. To perform this build successfully, only the OpenCL header `/usr/include/CL/opencl.h` and library `/usr/lib/x86_64-linux-gnu/libOpenCL.so` are required, they implement OpenCL API support which is not hardware dependent.
```
Scanning dependencies of target nrLDPC_decoder_kernels_CL
Built target nrLDPC_decoder_kernels_CL
Scanning dependencies of target ldpc_cl
Building C object CMakeFiles/ldpc_cl.dir/usr/local/oai/oai-develop/openairinterface5g/openair1/PHY/CODING/nrLDPC_decoder/nrLDPC_decoder_CL.c.o
In file included from /usr/include/CL/cl.h:32,
from /usr/include/CL/opencl.h:38,
from /usr/local/oai/oai-develop/openairinterface5g/openair1/PHY/CODING/nrLDPC_decoder/nrLDPC_decoder_CL.c:49:
/usr/include/CL/cl_version.h:34:9: note: #pragma message: cl_version.h: CL_TARGET_OPENCL_VERSION is not defined. Defaulting to 220 (OpenCL 2.2)
#pragma message("cl_version.h: CL_TARGET_OPENCL_VERSION is not defined. Defaulting to 220 (OpenCL 2.2)")
^~~~~~~
Building C object CMakeFiles/ldpc_cl.dir/usr/local/oai/oai-develop/openairinterface5g/openair1/PHY/CODING/nrLDPC_encoder/ldpc_encoder_optim8segmulti.c.o
Linking C shared module libldpc_cl.so
Built target ldpc_cl
```
At runtime, to successfully use hardware acceleration via OpenCL, you need to install vendor specific packages which deliver the required drivers and tools to make use of their GPU (Nvidia, Intel...) , fpga (Xilinx, Intel) or CPU (Intel, AMD, ARM...) through OpenCL.
```
./nr-softmodem -O libconfig:gnb.band78.sa.fr1.106PRB.usrpb210.conf:dbgl5 --rfsim --rfsimulator.serveraddr server --log_config.gtpu_log_level info --loader.ldpc.shlibversion _cl
```
```
./nr-uesoftmodem -r 106 --numerology 1 --band 78 -C 3619200000 --rfsim -O libconfig:/usr/local/oai/conf/nrue_sim.conf:dbgl5 --loader.ldpc.shlibversion _cl --log_config.hw_log_level inf
```
A mechanism to select ldpc implementation is also available in the `ldpctest` phy simulator via the `-v` option, which can be used to specify the version of the ldpc shared library to be used.
#### Examples of ldpc shared lib selection when running ldpctest:
@@ -151,14 +117,6 @@ Loading libldpc_cuda.so, the cuda implementation of the ldpc decoder:
$ ./ldpctest -v _cuda
```
Loading libldpc_cl.so, the opencl implementation of the ldpc decoder:
`make ldpc_cl`
```
$ ./ldpctest -v _cl
```
### LDPC libraries
The prototypes for the functions of the interface are defined in [nrLDPC_defs.h](file://nrLDPC_defs.h) as typedefs.
Libraries implementing the LDPC algorithms must be named `libldpc<_version>.so`, they must implement four functions with the names and types:
@@ -169,6 +127,4 @@ Libraries implementing the LDPC algorithms must be named `libldpc<_version>.so`,
`libldpc_cuda.so` has been tested with the `ldpctest` executable, usage from the softmodem's has to be tested.
`libldpc_cl.so` is under development.
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