루프를 위해 여러 커널 호출을 수행하려고합니다. 시도한 코드는 다음과 같습니다.다중 커널 호출 for 루프
id<MTLDevice> device = MTLCreateSystemDefaultDevice();
NSLog(@"Device: %@", [device name]);
id<MTLCommandQueue> commandQueue = [device newCommandQueue];
NSError * ns_error = nil;
//id<MTLLibrary> defaultLibrary = [device newDefaultLibrary];
id<MTLLibrary>defaultLibrary = [device newLibraryWithFile:@"/Users/i/tmp/tmp6/s.metallib" error:&ns_error];
//get fuction
id<MTLFunction> newfunc = [ defaultLibrary newFunctionWithName:@"sigmoid" ];
// Buffer for storing encoded commands that are sent to GPU
id<MTLCommandBuffer> commandBuffer = [commandQueue commandBuffer];
//set input and output data
float tmpbuf[2][1000];
float outbuf[2][1000];
float final_out[2][1000];
for(int i = 0; i < 1000; i++)
{
tmpbuf[0][i] = i;
outbuf[0][i] = 0;
tmpbuf[1][i] = 10*i;
outbuf[1][i] = 0;
}
int tmp_length = 1000*sizeof(float);
//get pipelinestat
id<MTLComputePipelineState> cpipeline[2];
cpipeline[0] = [device newComputePipelineStateWithFunction: newfunc error:&ns_error ];
cpipeline[1] = [device newComputePipelineStateWithFunction: newfunc error:&ns_error ];
id<MTLBuffer> inVectorBuffer[2];
id<MTLBuffer> outVectorBuffer[2];
id <MTLComputeCommandEncoder> computeCommandEncoder[2];
computeCommandEncoder[0] = [commandBuffer computeCommandEncoder];
computeCommandEncoder[1] = [commandBuffer computeCommandEncoder];
MTLSize ts= {10, 1, 1};
MTLSize numThreadgroups = {100, 1, 1};
for(int k = 0; k < 2; k++)
{
inVectorBuffer[k] = [device newBufferWithBytes: tmpbuf[k] length: tmp_length options: MTLResourceOptionCPUCacheModeDefault ];
[computeCommandEncoder[k] setBuffer: inVectorBuffer[k] offset: 0 atIndex: 0 ];
outVectorBuffer[k] = [device newBufferWithBytes: outbuf[k] length: tmp_length options: MTLResourceOptionCPUCacheModeDefault ];
[computeCommandEncoder[k] setBuffer: outVectorBuffer[k] offset: 0 atIndex: 1 ];
[computeCommandEncoder[k] setComputePipelineState:cpipeline[k] ];
[computeCommandEncoder[k] dispatchThreadgroups:numThreadgroups threadsPerThreadgroup:ts];
[computeCommandEncoder[k] endEncoding ];
}
[ commandBuffer commit];
[ commandBuffer waitUntilCompleted];enter code here
제대로 작동하지 않습니다. 그것이 실행되었을 때, 다음 정보가 reproted되었습니다.
아무도 문제를 지적 할 수 있습니다. 미리 감사드립니다.
루프 내에서 각 반복마다 인코딩을 끝내지 만 루프 외부에서는 한 번만 커밋하지 않습니다. – Marius