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解决ROIAlign_cuda.cu和ROIPool_cuda.cu编译错误（遇到的两个问题）
报错1：
D:/python/frankmocap-master/frankmocap-master/detectors/hand_object_detector/lib/model/csrc/cuda/ROIAlign_cuda.cu(275): error: no instance of function template "THCCeilDiv" matches the argument list
argument types are: (long long, long)
D:/python/frankmocap-master/frankmocap-master/detectors/hand_object_detector/lib/model/csrc/cuda/ROIAlign_cuda.cu(275): error: no instance of overloaded function "std::min" matches the argument list
argument types are: (<error-type>, long)
D:/python/frankmocap-master/frankmocap-master/detectors/hand_object_detector/lib/model/csrc/cuda/ROIAlign_cuda.cu(320): error: no instance of function template "THCCeilDiv" matches the argument list
argument types are: (int64_t, long)
D:/python/frankmocap-master/frankmocap-master/detectors/hand_object_detector/lib/model/csrc/cuda/ROIAlign_cuda.cu(320): error: no instance of overloaded function "std::min" matches the argument list
argument types are: (<error-type>, long)
4 errors detected in the compilation of "C:/Users/18295/AppData/Local/Temp/tmpxft_00003514_00000000-10_ROIAlign_cuda.cpp1.ii"
解决方法：
修改maskscoring_rcnn/maskrcnn_benchmark/csrc/cuda/ROIAlign_cuda.cu第275行：
//原代码： dim3 grid(std::min(THCCeilDiv(output_size, 512L), 4096L));
dim3 grid(std::min(((int)output_size + 512 -1) / 512, 4096));
修改maskscoring_rcnn/maskrcnn_benchmark/csrc/cuda/ROIAlign_cuda.cu第320行：
//原代码： dim3 grid(std::min(THCCeilDiv(grad.numel(), 512L), 4096L));
dim3 grid(std::min(((int)(grad.numel()) + 512 -1) / 512, 4096));
修改maskscoring_rcnn/maskrcnn_benchmark/csrc/cuda/ROIPool_cuda.cu第129行：
// dim3 grid(std::min(THCCeilDiv(output_size, 512L), 4096L));
dim3 grid(std::min(((int)output_size + 512 -1) / 512, 4096));
修改maskscoring_rcnn/maskrcnn_benchmark/csrc/cuda/ROIPool_cuda.cu第176行：
//dim3 grid(std::min(THCCeilDiv(grad.numel(), 512L), 4096L));
dim3 grid(std::min(((int)(grad.numel()) + 512 -1) / 512, 4096));
修改完毕后再执行python setup.py build develop即可
报错2：
error: ROIAlign_cuda.cu和ROIPool_cuda.cu文件中"__floorf"和"__ceilf"错误
error: calling a __host__ function("__floorf") from a __device__
function("get_coordinate_weight<float> ") is not allowed
error: identifier "__floorf" is undefined in device code
error: calling a __host__ function("__ceilf") from a __global__
function("detectron2::RoIAlignRotatedForward<float> ") is not allowed
error: identifier "__ceilf" is undefined in device code
解决方法：
找到ROIAlign_cuda.cu和ROIPool_cuda.cu文件，把里面的ceil和floor后面都加上f，即ceil改为ceilf、floor改为floorf
执行成功如下：
解决ROIAlign_cuda.cu和ROIPool_cuda.cu编译错误（遇到的两个问题）
报错1：
D:/python/frankmocap-master/frankmocap-master/detectors/hand_object_detector/lib/model/csrc/cuda/ROIAlign_cuda.cu(275): error: no instance of function template "THCCeilDiv" matches the argument list
argument types are: (long long, long)
D:/python/frankmocap-master/frankmocap-master/detectors/hand_object_detector/lib/model/csrc/cuda/ROIAlign_cuda.cu(275): error: no instance of overloaded function "std::min" matches the argument list
argument types are: (<error-type>, long)
D:/python/frankmocap-master/frankmocap-master/detectors/hand_object_detector/lib/model/csrc/cuda/ROIAlign_cuda.cu(320): error: no instance of function template "THCCeilDiv" matches the argument list
argument types are: (int64_t, long)
D:/python/frankmocap-master/frankmocap-master/detectors/hand_object_detector/lib/model/csrc/cuda/ROIAlign_cuda.cu(320): error: no instance of overloaded function "std::min" matches the argument list
argument types are: (<error-type>, long)
4 errors detected in the compilation of "C:/Users/18295/AppData/Local/Temp/tmpxft_00003514_00000000-10_ROIAlign_cuda.cpp1.ii"
解决方法：
修改maskscoring_rcnn/maskrcnn_benchmark/csrc/cuda/ROIAlign_cuda.cu第275行：
//原代码： dim3 grid(std::min(THCCeilDiv(output_size, 512L), 4096L));
dim3 grid(std::min(((int)output_size + 512 -1) / 512, 4096));
修改maskscoring_rcnn/maskrcnn_benchmark/csrc/cuda/ROIAlign_cuda.cu第320行：
//原代码： dim3 grid(std::min(THCCeilDiv(grad.numel(), 512L), 4096L));
dim3 grid(std::min(((int)(grad.numel()) + 512 -1) / 512, 4096));
修改maskscoring_rcnn/maskrcnn_benchmark/csrc/cuda/ROIPool_cuda.cu第129行：
// dim3 grid(std::min(THCCeilDiv(output_size, 512L), 4096L));
dim3 grid(std::min(((int)output_size + 512 -1) / 512, 4096));
修改maskscoring_rcnn/maskrcnn_benchmark/csrc/cuda/ROIPool_cuda.cu第176行：
//dim3 grid(std::min(THCCeilDiv(grad.numel(), 512L), 4096L));
dim3 grid(std::min(((int)(grad.numel()) + 512 -1) / 512, 4096));
修改完毕后再执行python setup.py build develop即可
报错2：
error: ROIAlign_cuda.cu和ROIPool_cuda.cu文件中"__floorf"和"__ceilf"错误
error: calling a __host__ function("__floorf") from a __device__
function("get_coordinate_weight<float> ") is not allowed
error: identifier "__floorf" is undefined in device code
error: calling a __host__ function("__ceilf") from a __global__
function("detectron2::RoIAlignRotatedForward<float> ") is not allowed
error: identifier "__ceilf" is undefined in device code
解决方法：
找到ROIAlign_cuda.cu和ROIPool_cuda.cu文件，把里面的ceil和floor后面都加上f，即ceil改为ceilf、floor改为floorf
执行成功如下：
本文标签： cuerrorROIAligncudaInstanceTHCCeilDiv
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