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build
.vs
.clangd
test
settings.json
launch.json

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README.md
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@ -139,6 +139,158 @@ Note that in the current branch sample cross-compilation for QNX is not fully va
near future with QNX cross-compilation instructions. In the meantime, if you want to cross-compile for QNX please check out one
of the previous tags prior to the CMake build system transition in 12.8.
## Running All Samples as Tests
It's important to note that the CUDA samples are _not_ intended as a validation suite for CUDA. They do not cover corner cases, they do not completely cover the
runtime and driver APIs, etc. That said, it can sometimes be useful to run all of the samples as a quick sanity check and we provide a script to do so, `run_tests.py`.
This Python3 script finds all executables in a subdirectory you choose, matching application names with command line arguments specified in `test_args.json`. It accepts
the following command line arguments:
| Switch | Purpose | Example |
| -------- | -------------------------------------------------------------------------------------------------------------- | ----------------------- |
| --dir | Specify the root directory to search for executables (recursively) | --dir ./build/Samples |
| --config | JSON configuration file for executable arguments | --config test_args.json |
| --output | Output directory for test results (stdout saved to .txt files - directory will be created if it doesn't exist) | --output ./test |
| --args | Global arguments to pass to all executables (not currently used) | --args arg_1 arg_2 ... |
Application configurations are loaded from `test_args.json` and matched against executable names (discarding the `.exe` extension on Windows).
The script returns 0 on success, or the first non-zero error code encountered during testing on failure. It will also print a condensed list of samples that failed, if any.
There are three primary modes of configuration:
**Skip**
An executable configured with "skip" will not be executed. These generally rely on having attached graphical displays and are not suited to this kind of automation.
Configuration example:
```json
"fluidsGL": {
"skip": true
}
```
You will see:
```
Skipping fluidsGL (marked as skip in config)
```
**Single Run**
For executables to run one time only with arguments, specify each argument as a list entry. Each entry in the JSON file will be appended to the command line, separated
by a space.
Configuration example:
```json
"ptxgen": {
"args": [
"test.ll",
"-arch=compute_75"
]
}
```
You will see:
```
Running ptxgen
Command: ./ptxgen test.ll -arch=compute_75
Test completed with return code 0
```
**Multiple Runs**
For executables to run multiple times with different command line arguments, specify any number of sets of args within a "runs" list.
Configuration example:
```json
"recursiveGaussian": {
"runs": [
{
"args": [
"-sigma=10",
"-file=data/ref_10.ppm"
]
},
{
"args": [
"-sigma=14",
"-file=data/ref_14.ppm"
]
},
{
"args": [
"-sigma=18",
"-file=data/ref_18.ppm"
]
},
{
"args": [
"-sigma=22",
"-file=data/ref_22.ppm"
]
}
]
}
```
You will see:
```
Running recursiveGaussian (run 1/4)
Command: ./recursiveGaussian -sigma=10 -file=data/ref_10.ppm
Test completed with return code 0
Running recursiveGaussian (run 2/4)
Command: ./recursiveGaussian -sigma=14 -file=data/ref_14.ppm
Test completed with return code 0
Running recursiveGaussian (run 3/4)
Command: ./recursiveGaussian -sigma=18 -file=data/ref_18.ppm
Test completed with return code 0
Running recursiveGaussian (run 4/4)
Command: ./recursiveGaussian -sigma=22 -file=data/ref_22.ppm
Test completed with return code 0
```
### Example Usage
Here is an example set of commands to build and test all of the samples.
First, build:
```bash
mkdir build
cd build
cmake ..
make -j$(nproc)
```
Now, return to the samples root directory and run the test script:
```bash
cd ..
python3 run_tests.py --output ./test --dir ./build/Samples --config test_args.json
```
If all applications run successfully, you will see something similar to this (the specific number of samples will depend on your build type
and system configuration):
```
Test Summary:
Ran 181 tests
All tests passed!
```
If some samples fail, you will see something like this:
```
Test Summary:
Ran 181 tests
Failed tests (2):
volumeFiltering: returned 1
postProcessGL: returned 1
```
You can inspect the stdout logs in the output directory (generally `APM_<application_name>.txt` or `APM_<application_name>.run<n>.txt`) to help
determine what may have gone wrong from the output logs. Please file issues against the samples repository if you believe a sample is failing
incorrectly on your system.
## Samples list
### [0. Introduction](./Samples/0_Introduction/README.md)

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run_tests.py Normal file
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## Copyright (c) 2025, NVIDIA CORPORATION. All rights reserved.
##
## Redistribution and use in source and binary forms, with or without
## modification, are permitted provided that the following conditions
## are met:
## * Redistributions of source code must retain the above copyright
## notice, this list of conditions and the following disclaimer.
## * Redistributions in binary form must reproduce the above copyright
## notice, this list of conditions and the following disclaimer in the
## documentation and/or other materials provided with the distribution.
## * Neither the name of NVIDIA CORPORATION nor the names of its
## contributors may be used to endorse or promote products derived
## from this software without specific prior written permission.
##
## THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
## EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
## IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
## PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
## CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
## EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
## PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
## PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
## OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
## (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
## OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
##
## For additional information on the license terms, see the CUDA EULA at
## https://docs.nvidia.com/cuda/eula/index.html
import os
import sys
import json
import subprocess
import argparse
from pathlib import Path
def normalize_exe_name(name):
"""Normalize executable name across platforms by removing .exe if present"""
return Path(name).stem
def load_args_config(config_file):
"""Load arguments configuration from JSON file"""
if not config_file or not os.path.exists(config_file):
return {}
try:
with open(config_file, 'r') as f:
config = json.load(f)
# Validate the config format
if not isinstance(config, dict):
print("Warning: Config file must contain a dictionary/object")
return {}
return config
except json.JSONDecodeError:
print("Warning: Failed to parse config file as JSON")
return {}
except Exception as e:
print(f"Warning: Error reading config file: {str(e)}")
return {}
def find_executables(root_dir):
"""Find all executable files recursively"""
executables = []
for path in Path(root_dir).rglob('*'):
# Skip directories
if not path.is_file():
continue
# Check if file is executable
if os.access(path, os.X_OK):
# Skip if it's a library file
if path.suffix.lower() in ('.dll', '.so', '.dylib'):
continue
executables.append(path)
return executables
def run_test(executable, output_dir, args_config, global_args=None):
"""Run a single test and capture output"""
exe_path = str(executable)
exe_name = executable.name
base_name = normalize_exe_name(exe_name)
# Check if this executable should be skipped
if base_name in args_config and args_config[base_name].get("skip", False):
print(f"Skipping {exe_name} (marked as skip in config)")
return 0
# Get argument sets for this executable
arg_sets = []
if base_name in args_config:
config = args_config[base_name]
if "args" in config:
# Single argument set (backwards compatibility)
if isinstance(config["args"], list):
arg_sets.append(config["args"])
else:
print(f"Warning: Arguments for {base_name} must be a list")
elif "runs" in config:
# Multiple argument sets
for run in config["runs"]:
if isinstance(run.get("args", []), list):
arg_sets.append(run.get("args", []))
else:
print(f"Warning: Arguments for {base_name} run must be a list")
# If no specific args defined, run once with no args
if not arg_sets:
arg_sets.append([])
# Run for each argument set
failed = False
run_number = 1
for args in arg_sets:
# Create output file name with run number if multiple runs
if len(arg_sets) > 1:
output_file = os.path.abspath(f"{output_dir}/APM_{exe_name}.run{run_number}.txt")
print(f"Running {exe_name} (run {run_number}/{len(arg_sets)})")
else:
output_file = os.path.abspath(f"{output_dir}/APM_{exe_name}.txt")
print(f"Running {exe_name}")
try:
# Prepare command with arguments
cmd = [f"./{exe_name}"]
cmd.extend(args)
# Add global arguments if provided
if global_args:
cmd.extend(global_args)
print(f" Command: {' '.join(cmd)}")
# Store current directory
original_dir = os.getcwd()
try:
# Change to executable's directory
os.chdir(os.path.dirname(exe_path))
# Run the executable and capture output
with open(output_file, 'w') as f:
result = subprocess.run(
cmd,
stdout=f,
stderr=subprocess.STDOUT,
timeout=300 # 5 minute timeout
)
if result.returncode != 0:
failed = True
print(f" Test completed with return code {result.returncode}")
finally:
# Always restore original directory
os.chdir(original_dir)
except subprocess.TimeoutExpired:
print(f"Error: {exe_name} timed out after 5 minutes")
failed = True
except Exception as e:
print(f"Error running {exe_name}: {str(e)}")
failed = True
run_number += 1
return 1 if failed else 0
def main():
parser = argparse.ArgumentParser(description='Run all executables and capture output')
parser.add_argument('--dir', default='.', help='Root directory to search for executables')
parser.add_argument('--config', help='JSON configuration file for executable arguments')
parser.add_argument('--output', default='.', # Default to current directory
help='Output directory for test results')
parser.add_argument('--args', nargs=argparse.REMAINDER,
help='Global arguments to pass to all executables')
args = parser.parse_args()
# Create output directory if it doesn't exist
if args.output:
os.makedirs(args.output, exist_ok=True)
# Load arguments configuration
args_config = load_args_config(args.config)
executables = find_executables(args.dir)
if not executables:
print("No executables found!")
return 1
print(f"Found {len(executables)} executables")
failed = []
for exe in executables:
ret_code = run_test(exe, args.output, args_config, args.args)
if ret_code != 0:
failed.append((exe.name, ret_code))
# Print summary
print("\nTest Summary:")
print(f"Ran {len(executables)} tests")
if failed:
print(f"Failed tests ({len(failed)}):")
for name, code in failed:
print(f" {name}: returned {code}")
return failed[0][1] # Return first failure code
else:
print("All tests passed!")
return 0
if __name__ == '__main__':
sys.exit(main())

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{
"simpleCUDA2GL": {
"skip": true
},
"simpleTexture3D": {
"args": [
"--file=ref_texture3D.bin"
]
},
"ptxgen": {
"args": [
"test.ll",
"-arch=compute_75"
]
},
"volumeRender": {
"args": [
"--file=ref_volume.ppm"
]
},
"fluidsGL": {
"skip": true
},
"simpleD3D11Texture": {
"skip": true
},
"recursiveGaussian": {
"runs": [
{
"args": [
"-sigma=10",
"-file=data/ref_10.ppm"
]
},
{
"args": [
"-sigma=14",
"-file=data/ref_14.ppm"
]
},
{
"args": [
"-sigma=18",
"-file=data/ref_18.ppm"
]
},
{
"args": [
"-sigma=22",
"-file=data/ref_22.ppm"
]
}
]
},
"simpleGL": {
"args": [
"-file=data/ref_simpleGL.bin"
]
},
"bicubicTexture": {
"runs": [
{
"args": [
"-mode=0",
"-file=data/0_nearest.ppm"
]
},
{
"args": [
"-mode=1",
"-file=data/1_bilinear.ppm"
]
},
{
"args": [
"-mode=2",
"-file=data/2_bicubic.ppm"
]
},
{
"args": [
"-mode=3",
"-file=data/3_fastcubic.ppm"
]
},
{
"args": [
"-mode=4",
"-file=data/4_catmull-rom.ppm"
]
}
]
},
"simpleVulkan": {
"skip": true
},
"smokeParticles": {
"args": [
"-qatest"
]
},
"Mandelbrot": {
"runs": [
{
"args": [
"-mode=0",
"-file=data/Mandelbrot_fp32.ppm"
]
},
{
"args": [
"-mode=1",
"-file=data/referenceJulia_fp32.ppm"
]
}
]
},
"vulkanImageCUDA": {
"skip": true
},
"SobelFilter": {
"runs": [
{
"args": [
"-mode=0",
"-file=data/ref_orig.pgm"
]
},
{
"args": [
"-mode=1",
"-file=data/ref_tex.pgm"
]
},
{
"args": [
"-mode=2",
"-file=data/ref_shared.pgm"
]
}
]
},
"bilateralFilter": {
"runs": [
{
"args": [
"-radius=5",
"-file=data/ref_05.ppm"
]
},
{
"args": [
"-radius=6",
"-file=data/ref_06.ppm"
]
},
{
"args": [
"-radius=7",
"-file=data/ref_07.ppm"
]
},
{
"args": [
"-radius=8",
"-file=data/ref_08.ppm"
]
}
]
},
"nbody": {
"args": [
"-benchmark",
"-compare",
"-cpu"
]
},
"volumeFiltering": {
"args": [
"-file=data/ref_volumefilter.ppm"
]
},
"simpleVulkanMMAP": {
"skip": true
},
"postProcessGL": {
"skip": true
},
"marchingCubes": {
"runs": [
{
"args": [
"-dump=0",
"-file=data/posArray.bin"
]
},
{
"args": [
"-dump=1",
"-file=data/normalArray.bin"
]
},
{
"args": [
"-dump=2",
"-file=data/compVoxelArray.bin"
]
}
]
},
"bindlessTexture": {
"args": [
"-file=data/ref_bindlessTexture.bin"
]
},
"cuSolverSp_LinearSolver": {
"runs": [
{
"args": [
"-R=qr"
]
},
{
"args": [
"-R=chol"
]
},
{
"args": [
"-R=qr",
"-P=symamd"
]
},
{
"args": [
"-R=chol",
"-P=symamd"
]
},
{
"args": [
"-R=lu",
"-P=symamd"
]
}
]
},
"randomFog": {
"args": [
"-qatest"
]
},
"oceanFFT": {
"args": [
"-qatest"
]
},
"FunctionPointers": {
"runs": [
{
"args": [
"-mode=0",
"-file=data/ref_orig.pgm"
]
},
{
"args": [
"-mode=1",
"-file=data/ref_tex.pgm"
]
},
{
"args": [
"-mode=2",
"-file=data/ref_shared.pgm"
]
}
]
},
"particles": {
"args": [
"-file=data/ref_particles.bin"
]
},
"imageDenoising": {
"runs": [
{
"args": [
"-kernel=0",
"-file=data/ref_passthru.ppm"
]
},
{
"args": [
"-kernel=1",
"-file=data/ref_knn.ppm"
]
},
{
"args": [
"-kernel=2",
"-file=data/ref_nlm.ppm"
]
},
{
"args": [
"-kernel=3",
"-file=data/ref_nlm2.ppm"
]
}
]
},
"boxFilter": {
"runs": [
{
"args": [
"-radius=14",
"-file=data/ref_14.ppm"
]
},
{
"args": [
"-radius=22",
"-file=data/ref_22.ppm"
]
}
]
}
}