322 questions
0
votes
1
answer
34
views
How to avoid find_package_handle_standard_args package name warning
In LibTorch 2.0.1 I was able to use the library without installing it (download library and set CMAKE_PREFIX_PATH to allow CMake to find the library). Using LibTorch 2.5.1 and CUDA 12.6 I have to ...
0
votes
0
answers
19
views
Simulating a file that includes libtorch with gem5
I successfully built libtorch and generated the binary for the following simple function (torch::rand({2, 3});) to simulate it with gem5 in SE mode. However, the simulation takes a very long time, so ...
- 1
0
votes
0
answers
132
views
Building PyTorch 2.5.1 (libtorch + main PyTorch) with CUDA 12.6.3 and cuDNN 9.5.1
My goal is to build PyTorch from source for use in image generation AI workflows (e.g., ComfyUI).
I would like to request guidance on the correct method to build PyTorch 2.5.1 (both libtorch and the ...
1
vote
0
answers
60
views
std::bad_alloc when loading PyTorch model in C++ using LibTorch
I'm trying to load a traced PyTorch model in C++ using LibTorch but encountering a std::bad_alloc error. I've set up a minimal example to demonstrate the issue.
The Problem:
When running my C++ ...
- 107
1
vote
1
answer
50
views
Use Boost python with libtorch
I am trying to create a python package from C++ code with Boost python. However when including libtorchin the code, the resulting python package shows strange errors such as
Boost.Python....
- 91
0
votes
0
answers
65
views
How do you optimize inference batch size in c++ pytorch libtorch?
I have an inference service using cpu (will migrate to gpu later but right now I am stuck with cpu) that is taking request through thrift and returning inference result
Right now its doing inference 1 ...
- 63
1
vote
0
answers
46
views
How does batch inference work in pytorch c++
I am looking for ways to batch inference instead of inference one request at a time in c++
For example, assuming each request in requests is a single prediction containing n feature, each feat
for (...
- 63
0
votes
0
answers
84
views
How to set up CMakeLists.txt for Libtorch in a C++ Project?
I have a simple project with use of libtorch. The structure of the project is the following:
MyLibtorchProject/
├── CMakeLists.txt
├── main.cpp
├── libtorch/
└── build/
The content of CMakeLists.txt ...
0
votes
1
answer
66
views
How to bundle libtorch with my rust binary?
I am developing an AI chat desktop application targeting Apple M chips. The app utilizes embedding models and reranker models, for which I chose Rust-Bert due to its capability to handle such models ...
- 2,811
4
votes
1
answer
105
views
Why is a namespace-qualified name available as a candidate?
Using libtorch, the following snippet causes an error:
#include <iostream>
#include <torch/torch.h>
using namespace torch;
int main() {
std::cout << zeros({}) << std::endl;
...
- 152k
3
votes
0
answers
70
views
OpenCV and Libtorch conflict
Ubuntu 24 system; CLion IDE. When trying to run code using OpenCV and Libtorch, the following errors occur:
main.cpp:34:(.text+0xa28): undefined reference to `cv::putText(cv::_InputOutputArray const&...
- 153
0
votes
1
answer
180
views
Unable to load DLL 'LibTorchSharp' or one of its dependencies: The specified procedure could not be found
I'm attempting to use ML.NET to build a model for a simple text classification, but using the CPU rather than GPU due to lacking one with CUDA. However, trying to execute my current code results in ...
0
votes
1
answer
71
views
PyTorch in C++ - how to get part of tensor for all dimensions?
I have the following tensor operation in Python:
A = A[
:,
h_offset:h_offset + fineSize,
w_offset:w_offset + fineSize
]
where *_offset and fineSize are some integers. I am ...
- 9,581
0
votes
0
answers
78
views
cmake libtorch build issue
I'm not used with working with cmake. Currently I'm building libtorch with cmake according to this guide here.
However during the build an error message appears
"CMake Error at C:/lib_sources/...
- 41
3
votes
2
answers
250
views
libtorch can't detect CUDA, while CUDA runtime can
#include <cuda_runtime.h>
#include <torch/torch.h>
#include <iostream>
int main() {
std::cout << "CUDA device count: " << torch::cuda::device_count() <&...
- 51
0
votes
0
answers
49
views
Cannot forward model in Pytorch Lite 1.9.0 in Android native app
I am building a android app with Java, C++, libtorch. My light model is VQA which task 4 args: image_features, input_ids, attention_mask, token_type_ids.
Currently, I cannot forward the inputs. It ...
-1
votes
1
answer
78
views
Cannot open file: extension.h, but IncludePath is set [duplicate]
Using VS Code launched from Visual Studio 2019 professional developer terminal (windows 11). I am trying to include torch/extension.h by including the path of the conda environment in which I have ...
- 1
0
votes
0
answers
58
views
I get an error when using libtorch in Rust on windows 11
I wanted to create a program in Rust that uses libtorch to read yolo models and identify what is on the screen, but I am stuck at the beginning of the process.
I am using windows 11.
Below is the ...
0
votes
0
answers
42
views
Which api in `libtorch` corresponding the `ctx.needs_input_grad` in pytorch when to define custom `torch.autograd.Function`?
When I tanslate the following python code to cpp code with libtorch api
class _SphericalHarmonics(torch.autograd.Function):
"""Spherical Harmonics"""
@...
- 101
0
votes
0
answers
85
views
Error running code using Libtorch C++ Windows (VS2022). Intel MKL FATAL ERROR
After Installing MKL I can't find those dll files. And the error continues.
Intel MKL FATAL ERROR: cannot load mkl_vml_avx2.1.dll or mkl_vml_def.1.dll, at runtime.
Libtorch Distrib I'm using is: CUDA ...
2
votes
1
answer
105
views
Weird behavior from CUDA (Libtorch) and OpenGL interop [closed]
I am trying to write functions to transform an OpenGL texture to a PyTorch tensor and back in a C++ app. To test that it works I added 128 to the tensor to basically brighten the image, and then ...
- 31
1
vote
0
answers
332
views
How I can load model and inference using Libtorch (C++)?
I trained simple model for MNIST using it https://github.com/pytorch/examples/blob/main/cpp/mnist/mnist.cpp
I added code for saving model like below
string model_path = "model.pt";
torch::...
- 25
0
votes
0
answers
347
views
Getting started with Libtorch in C++
having some trouble getting a basic nn Module working with libtorch. I’m trying to copy the example found here Using the PyTorch C++ Frontend — PyTorch Tutorials 2.3.0+cu121 documentation
#include <...
- 421
0
votes
0
answers
58
views
Why can inconsistent function names be called correctly in the scenario of calling functions defined by c++in python code?
I saw a project on GitHub that involved Python code to call functions defined in C++.
Strangely, the function name defined in C++ is A, but it can be called through the name B in Python, where A and B ...
0
votes
0
answers
126
views
No such file error loading pytorch model on c++
I am working on an AI for an open source game. But when I try to load the pt file (the pytorch model) onto c++ using <torch/script.h> library, the program fails to execute torch::jit::script::...
0
votes
0
answers
76
views
C++ Extension for PyTorch - Missing DLL
I'm writing a C++ extension for PyTorch on Windows in Visual Studio 2022. Everything compiles correctly, but both ways I've tried (via CMake and via a setup.py file) I get the same error when ...
- 101
0
votes
0
answers
42
views
How to trace pytorch flow to CPP
My goal is being able to adjust the backend of distributed functions according to requirements. For example, I wish to be able to change a failed GPU to be substituted with a constant value tensor ...
- 63
0
votes
0
answers
142
views
Loading traced pytorch model to C++
Will be grateful for any help :(
I'm having a problem with using pytorch pretrained model in C++ via TorchLib. I've added Torchlib to Cmake and it successfully downloads the model and works until line:...
- 1
0
votes
0
answers
34
views
Error when linking Libtorch with OpenFOAM: Two or more data types in declaration error, C++14
I am trying to link a custom library of (type of combustion class) OpenFOAM with Libtorch for a custom class. When I include some libtorch headers (for example: <torch/torch.h> ) I receive a ...
- 1
0
votes
0
answers
137
views
Can not load scripted model using torch::jit::load
I use torch.jit.script to save model and using C++ to load it：
#include <torch/script.h>
using namespace std;
int main() {
std::string model_path = "G:/modelscriptcuda.pt";
...
- 1
0
votes
0
answers
178
views
Is there a way to use a specific Pytorch model image processor in C++?
I would like to use a pretrained image segmentation AI model developed with Pytorch in my C++ program.
For that I have to convert it into TorchScript in order to be able to use it in my said program, ...
0
votes
0
answers
51
views
Missing symbols when building UE 5.3.2 based project with libtorch dependency
I have a UE 5.3.2 based project with a libtorch included. I'm using libtorch 2.1.0+cpu.
The linker error I have is:
1>------ Building 2 action(s) started ------
1>[1/2] Link [x64] UnrealEditor-...
- 435
0
votes
0
answers
39
views
How to transfer data between Aramdillo matrix and LibTorch tensor?
I am trying to transfer data between Aramdillo matrix and LibTorch tensor.
I referenced this project, but the conversion failed in my Linux environment.
Then I tried to convert using the from_blob ...
- 21
1
vote
1
answer
247
views
C program using a wrapper libtorch c++ library not linking
I'm trying to make a libtorch c++ library to use it in a C program, exporting library functions with extern "C". The library seems to compile and link correctly. But the main executable ...
- 1,002
0
votes
0
answers
380
views
Issues setting up LibTorch on Windows 11
Hello and thanks in advance!
When following the official LibTorch installation guide, I ran across a four separate errors when building the project. I have not found solutions to the last two errors ...
1
vote
1
answer
56
views
Why might the single act of linking against a library drastically degrade the runtime of a C++ program?
I have a reasonably large C++ project, and I would like to add LibTorch as a dependency. I've downloaded the pre-built LibTorch libraries from the website, and updated my CMakeFile as follows:
...
- 401
0
votes
0
answers
160
views
LoadLibrary error while using libtorch with ROS2
I am trying to build and run a ROS2 package which uses libtorch.
In CMakeLists.txt I wrote
set(Torch_DIR ~/libtorch/share/cmake/Torch/)
find_package(Torch)
ament_auto_add_library(my_lib SHARED
src/...
- 147
0
votes
0
answers
244
views
Allowed data types in torch.jit.trace()
I want to save a segmentation model pipeline to a mobile optimized model that I can run on iOS or call from a C++ program. I am using two pretrained models, whose code I can not change.
I am majorly ...
- 35
0
votes
0
answers
43
views
compatibility between nvidia driver and cuda [duplicate]
I have a RTX 4070 and it said nvidia-driver-535 is recommended.
and I installed the driver. but when I type nvidia-smi, it said CUDA version: 12.2
but I want to get CUDA 11.8 or 12.1
Question :
...
0
votes
0
answers
114
views
Crash of the software when forwarding a libtorch model
My software is crashing when I try to forward my libtorch model and I don't understand why. I compiled with Visual Studio 2019 (v142), ISO C++20, libtorch 2.0.0+cu118
Here is the code:
struct ...
- 1
0
votes
0
answers
55
views
Memory address are the same after creating new tensor
std::map<std::string, torch::Tensor*> tmpFloatActivations = model.getActivations();
std::map<std::string, torch::Tensor*> floatActivations;
floatActivations.insert(tmpFloatActivations....
- 743
0
votes
0
answers
56
views
libtorch forward result unexpected
I use a small net. The net converges and the accuracy is 1.0 after 400 iterations. So far, so good.
conv1(torch::nn::Conv2dOptions(1, 15, /*kernel_size=*/3)),
conv2(torch::nn::Conv2dOptions(15, 30,...
0
votes
0
answers
91
views
How to link torch in leveldb, and use leveldb in YCSB-cpp?
I want use torch (C++ version of pytorch) in leveldb, and link leveldb in YCSB-cpp to benchmark it. I can not install torch and leveldb in system path, because I using public sever. I got some error ...
- 21
0
votes
0
answers
72
views
Solving LNK4022 (not a unique symbol "Initialize" found) without changing export.def
I am trying to solve an LNK4022 issue (not a unique symbol "Initialize" found) but I can't modify the export.def file. The release is a DLL which can only be read by the final software if ...
- 1
0
votes
0
answers
104
views
torch.jit.script Error for nn.Module attributes in the __init__: Module has no attribute
I am trying to use torch.jit.script to script the demucs audio separation ML model.
Ultimately, I'm trying to make the model compatible with coreml to use it in an iOS app
RuntimeError:
Module '...
- 9
1
vote
0
answers
124
views
best way to create libtorch (tch-rs) tensor from polars dataframe
What would be the most efficient way to create libtorch (tch-rs) tensor from polars dataframe?
I can only make it working with as_slice->from_slice like
Tensor::from_slice(
series.f64()?
....
- 3,032
0
votes
0
answers
64
views
How to convert at::ScalarType to c++ type?
I have a template class have two typename
// key maybe uint32_t or uint64_t, elem can be any interger or float type
template <typename KeyType, typename ElemType>
class Cache{
// ....
};
I ...
- 105
1
vote
0
answers
73
views
Callgrind for CUDA program, execution time in percentages do not add up to 100%
I have a CNN image classification C++ program that uses LibTorch(Pytorch)/CUDA to improve the inference performance. I try using Callgrind：
valgrind --tool=callgrind ./my-bin
to profile it and find ...
- 507
0
votes
1
answer
614
views
Issue building Libtorch Rust Projects
Apologies if this isn't the best place to post this.
I'm trying to learn how to do Pytorch in Rust. Have previous experience with Libtorch in C++ and Pytorch in Python. I'm running into issues setting ...
- 11
0
votes
0
answers
89
views
Different results PyTorch vs Libtorch
I am trying to calculate a disparity image for the same traced model in python and c++ but I am getting different outputs.
I tried and follow the same steps in c++ as in python but it seems I missed ...
