protozis / conformal_opencl

conformal_opencl

Input Points	Input STL Model	Output Points

Dependences

Most C programs are written in ISO C. However some of the environmental configuration would be nasty for clang when you are compiling OpenCL kernel program. glibc is recommended instead. As for the The OpenCL driver, it really depends on the platform you have. You should check your OS instruction for the driver packages needed. In Archlinux they are

Runtime

• OpenCL (For C binary)

  • Intel GPU: intel-compute-runtime
  • Intel CPU: intel-opencl-runtime<sup>AUR</sup>
  • Nvidia GPU: opencl-nvidia
  • AMD GPU: opencl-mesa
  • AMD CPU: Not supported anymore.

• Tools

  • clinfo: good for monitoring all possible platform properties of the system.

Development

• ICD loader: ocl-icd
• Headers: opencl-headers

Compile

> cd src
> make
gcc -g -m64 -c launcher.c -o launcher.c.o
gcc -g -m64 -c conformal.c -o conformal.c.o
gcc -std=c99 -Wall -DUNIX -g -DDBUG -o launcher launcher.c.o conformal.c.o   -lOpenCL -lm

Usage

1. Prepare data points file in src/data/points.txt as

105 //total number of points
1 2
1 5
3.4 5.6
...
..
.

2. Prepare STL model in src/data/input.stl
3. Check prefer platform and device with clinfo -l

> clinfo -l
Platform #0: Intel(R) OpenCL HD Graphics
 `-- Device #0: Intel(R) UHD Graphics 620 [0x3ea0]
Platform #1: Intel(R) OpenCL
 `-- Device #0: Intel(R) Core(TM) i7-8565U CPU @ 1.80GHz
Platform #2: NVIDIA CUDA
 `-- Device #0: NVIDIA GeForce MX150

4. To change platform and device being used, modify PLATFORM and DEVICE macross in src/luncher.c and re-compile.

#define PROGRAM_FILE "conformal_ocl.cl"

#define PLATFORM 1
#define DEVICE 0

int main(int argc, char *argv[])
{

5. Start conformal with src/luncher

[Opencl devices info]:
        Intel(R) UHD Graphics 620
                CL_DEVICE_MAX_WORK_ITEM_SIZES:  256/256/256
                CL_DEVICE_MAX_WORK_GROUP_SIZE:  256
                CL_DEVICE_MAX_COMPUTE_UNITS:  24
        Intel(R) Core(TM) i7-8565U CPU @ 1.80GHz
                CL_DEVICE_MAX_WORK_ITEM_SIZES:  8192/8192/8192
                CL_DEVICE_MAX_WORK_GROUP_SIZE:  8192
                CL_DEVICE_MAX_COMPUTE_UNITS:  8
[INPUT_DATA]:
        Number Triangles: 1996
        Number points: 1714

[Selected device]: Intel(R) Core(TM) i7-8565U CPU @ 1.80GHz
[Kernel info]:
        CL_KERNEL_WORK_GROUP_SIZE: 8
[RESULT]:
        Cal. time: 0.377547 secs
        Output file: data/output.txt