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Using CUDA while decoupling from the CUDA Toolkit as a hard-dependency #365

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merged 1 commit into from
Dec 15, 2023
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Using CUDA while decoupling from the CUDA Toolkit as a hard-dependency #365

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69 changes: 67 additions & 2 deletions LLama/Native/NativeApi.Load.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -7,6 +7,7 @@
using System.Linq;
using System.Runtime.InteropServices;
using System.Text.Json;
using System.Text.RegularExpressions;

namespace LLama.Native
{
Expand Down Expand Up @@ -69,9 +70,12 @@ private static int GetCudaMajorVersion()
cudaPath = Environment.GetEnvironmentVariable("CUDA_PATH");
if (cudaPath is null)
{
return -1;
version = GetCudaVersionFromDriverUtils_windows();
}
else
{
version = GetCudaVersionFromPath(cudaPath);
}
version = GetCudaVersionFromPath(cudaPath);
}
else if (RuntimeInformation.IsOSPlatform(OSPlatform.Linux))
{
Expand Down Expand Up @@ -115,6 +119,67 @@ private static int GetCudaMajorVersion()
}
}

private static string GetCudaVersionFromDriverUtils_windows()
{
try
{
var psi = new ProcessStartInfo
{
FileName = "nvidia-smi",
RedirectStandardOutput = true,
UseShellExecute = false,
CreateNoWindow = true
};
using (var process = Process.Start(psi))
{
if (process != null)
{
using (StreamReader reader = process.StandardOutput)
{
string output = reader.ReadToEnd();
process.WaitForExit();
string cudaVersion = GetNvidiaSmiValue(output, "CUDA Version");
string pattern = @":\s(\d+\.\d+)";
Match match = Regex.Match(cudaVersion, pattern);
string extractedValue = string.Empty;
if (match.Success && match.Groups.Count > 1)
{
extractedValue = match.Groups[1].Value;
}
return extractedValue;
}
}
else
{
return string.Empty;
}
}
}
catch (Exception)
{
return string.Empty;
}
}


static string GetNvidiaSmiValue(string nvidiaSmiOutput, string key)
{
int startIndex = nvidiaSmiOutput.IndexOf(key);
if (startIndex == -1)
{
return "N/A";
}
startIndex += key.Length;
int endIndex = nvidiaSmiOutput.IndexOf('\n', startIndex);
if (endIndex == -1)
{
endIndex = nvidiaSmiOutput.Length;
}
string value = nvidiaSmiOutput.Substring(startIndex, endIndex - startIndex).Trim();
return value;
}


private static string GetCudaVersionFromPath(string cudaPath)
{
try
Expand Down