Is cuda avaliable: false in Rust but true in C++

[Davidos533]

Hello
I have problem a long time can't fix it

systeminfo
OS Name: Microsoft Windows 10 Pro
OS Version: 10.0.19045 N/A Build 19045
GPU: 

nvidia-smi
+-----------------------------------------------------------------------------------------+
| NVIDIA-SMI 560.94                 Driver Version: 560.94         CUDA Version: 12.6     |
|-----------------------------------------+------------------------+----------------------+
| GPU  Name                  Driver-Model | Bus-Id          Disp.A | Volatile Uncorr. ECC |
| Fan  Temp   Perf          Pwr:Usage/Cap |           Memory-Usage | GPU-Util  Compute M. |
|                                         |                        |               MIG M. |
|=========================================+========================+======================|
|   0  NVIDIA GeForce GTX 1060 3GB  WDDM  |   00000000:01:00.0  On |                  N/A |
| 28%   37C    P8             11W /  120W |    1170MiB /   3072MiB |      1%      Default |
|                                         |                        |                  N/A |
+-----------------------------------------+------------------------+----------------------+

nvcc --version
nvcc: NVIDIA (R) Cuda compiler driver
Copyright (c) 2005-2022 NVIDIA Corporation
Built on Wed_Sep_21_10:41:10_Pacific_Daylight_Time_2022
Cuda compilation tools, release 11.8, V11.8.89
Build cuda_11.8.r11.8/compiler.31833905_0

PyTorch 2.5.0 C++ Libtorch version cu118
dowloaded from here:

https://download.pytorch.org/libtorch/cu118/libtorch-win-shared-with-deps-2.5.0%2Bcu118.zip

all variables set for user and as system:
(path to libtorch) PATH:

C:\FILES\libtorch
C:\FILES\libtorch\lib

LIBTORCH_INCLUDE=C:\FILES\libtorch
LIBTORCH_LIB=C:\FILES\libtorch
LIBTORCH=C:\FILES\libtorch
CUDA_HOME=...v11.8
CUDA_PATH=...v11.8
CUDA_PATH=...v11.8

i'am trying to use this example https://github.com/LaurentMazare/tch-rs/tree/main/examples/char-rnn

.cargo/config.toml

[env]
LIBTORCH="C:/FILES/libtorch"

with one addition at line 42: println!("{}", device.is_cuda());
and i when start i'am getting:

**false** (Is cuda avaliable: false)

AND Most intresing thing!
When i build it by C++ by this instruction

https://pytorch.org/cppdocs/installing.html

my code like:

#include <torch/torch.h>
#include <iostream>

int main() {
    if (torch::cuda::is_available()) {
        std::cout << "CUDA is available! Running on GPU." << std::endl;
    } else {
        std::cout << "CUDA is not available. Running on CPU." << std::endl;
    }

    return 0;
}

my CMakeLists.txt like

cmake_minimum_required(VERSION 3.18 FATAL_ERROR)
project(example-app)

find_package(Torch REQUIRED)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${TORCH_CXX_FLAGS}")

add_executable(example-app main.cpp)
target_link_libraries(example-app "${TORCH_LIBRARIES}")
set_property(TARGET example-app PROPERTY CXX_STANDARD 17)

# The following code block is suggested to be used on Windows.
# According to https://github.com/pytorch/pytorch/issues/25457,
# the DLLs need to be copied to avoid memory errors.
if (MSVC)
  file(GLOB TORCH_DLLS "${TORCH_INSTALL_PREFIX}/lib/*.dll")
  add_custom_command(TARGET example-app
                     POST_BUILD
                     COMMAND ${CMAKE_COMMAND} -E copy_if_different
                     ${TORCH_DLLS}
                     $<TARGET_FILE_DIR:example-app>)
endif (MSVC)

it's compiles and i get:

CUDA is available! Running on GPU.

Please help me

Edit:
I'am compared Rust compiled app with C++ compiled app by Dependency Walker
In Rust app no TORCH_CUDA.dll dep

C++ app deps:

Rust app deps:

[Davidos533]

omg guys
I lost more than a week
now it works!

i'am downgrade to tch-rs version: 0.17.0
and use this libtorch version:

https://download.pytorch.org/libtorch/cu118/libtorch-win-shared-with-deps-2.4.0%2Bcu118.zip

and torch_cuda.dll in deps!

Dump of file C:\FILES\Projects\street-recognizer\target\release\street-recognizer.exe

File Type: EXECUTABLE IMAGE

  Image has the following dependencies:

    bcryptprimitives.dll
    api-ms-win-core-synch-l1-2-0.dll
    torch_cuda.dll
    torch_cpu.dll
    c10.dll
    KERNEL32.dll
    ntdll.dll
    MSVCP140.dll
    VCRUNTIME140.dll
    VCRUNTIME140_1.dll
    api-ms-win-crt-string-l1-1-0.dll
    api-ms-win-crt-heap-l1-1-0.dll
    api-ms-win-crt-math-l1-1-0.dll
    api-ms-win-crt-runtime-l1-1-0.dll
    api-ms-win-crt-stdio-l1-1-0.dll
    api-ms-win-crt-environment-l1-1-0.dll
    api-ms-win-crt-locale-l1-1-0.dll

  Summary

        3000 .data
        6000 .pdata
       2E000 .rdata
        1000 .reloc
       96000 .text

and if i started it
Is cuda avaliable: true

But version tch-rs 0.18.0
not works!

[Anivie]

The answer in this link worked for me.