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Error: Non-static methods are not supported

Oct 13, 2012 at 6:57 PM

Hey all,


I'm getting an error when trying to do some vector maths using CUDAfy. I'm programming in Here's the code:


    Public Shared Sub Timesteper(ByVal IncliN() As Double, ByVal RaaN() As Double, ByVal ARgP() As Double, ByVal RadiuS() As Double, ByRef LaT() As Double, ByRef LonGG() As Double, ByRef INCUBE() As Double, ByVal radiuseperation As Double, ByVal latseperation As Double, ByVal longseperation As Double, ByVal len As Double)
            Dim watch As New Stopwatch
            aaa = IncliN
            bbb = RaaN
            ccc = ARgP
            ddd = RadiuS
            rads = radiuseperation
            lods = longseperation
            asdf = len
            ' This 'smart' method will Cudafy all members with the Cudafy attribute in the calling type (i.e. Program)
            Dim km As CudafyModule = CudafyTranslator.Cudafy()
            ' If cudafying will not work for you (CUDA SDK + VS not set up right) then comment out above and
            ' uncomment below. Remember to also comment out the Structs and 3D arrays region below.
            ' CUDA 4.0 SDK must be installed and cl.exe (VC++ compiler) must be in path. If you are compiling for
            ' x86 then 32-bit CUDA 4.0 must be installed (also on Windows 64-bit). 
            ' For x64 then 64-bit CUDA 4.0 must be installed.
            'CudafyModule km = CudafyModule.Deserialize(typeof(Program).Name);

            ' Get the first CUDA device and load our module
            _gpu = CudafyHost.GetDevice(eGPUType.Cuda)
            '#Region "Add vectors"

            lenn = len

            Dim aaaa As Double() = aaa
            Dim bbbb As Double() = bbb
            Dim cccc As Double() = ccc
            Dim dddd As Double() = ddd
            Dim eeee As Double() = New Double(lenn - 1) {}
            Dim ffff As Double() = New Double(lenn - 1) {}
            Dim gggg As Double() = New Double(lenn - 1) {}
            Dim hhhh As Double = radiuseperation
            Dim iiii As Double = latseperation
            Dim jjjj As Double = longseperation

            ' copy the arrays 'a' and 'b' to the GPU - these overloads automatically allocate GPU memory
            Dim dev_a As Double() = _gpu.CopyToDevice(aaaa)
            Dim dev_b As Double() = _gpu.CopyToDevice(bbbb)
            Dim dev_c As Double() = _gpu.CopyToDevice(cccc)
            Dim dev_d As Double() = _gpu.CopyToDevice(dddd)

            ' allocate memory on the GPU for the result - this allocate enough memory to hold a vector the
            ' same length as vector c - it does not copy vector c (same as _gpu.Allocate<int>(c.Length);)
            'Dim dev_c As Double() = _gpu.Allocate(Of Double)(c)
            Dim dev_e As Double() = _gpu.Allocate(Of Double)(eeee)
            Dim dev_f As Double() = _gpu.Allocate(Of Double)(ffff)
            Dim dev_g As Double() = _gpu.Allocate(Of Double)(gggg)
            ' Threads are grouped in Blocks. Blocks are grouped in a Grid. Here we launch N Blocks where
            ' each block contains 1 thread. Note addVector contains a GThread arg - no need to pass this.
            ' GThread is the Cudafy equivalent of the built-in CUDA variables. Use it to identify thread id.
            _gpu.Launch(1000, 1).TimeStepMark2(dev_a, dev_b, dev_c, dev_d, dev_e, dev_f, dev_g, hhhh, iiii, jjjj)

            ' copy the array 'c' back from the GPU to the CPU
            _gpu.CopyFromDevice(dev_e, eeee)
            _gpu.CopyFromDevice(dev_f, ffff)
            _gpu.CopyFromDevice(dev_g, gggg)

            LaT = eeee
            LonGG = ffff
            INCUBE = gggg

            'Form1.RichTextBox1.AppendText(Chr(13) & a(N - 1) & ", " & b(N - 1) & ", " & c(N - 1) & Chr(13))

            'Form1.RichTextBox1.AppendText(Chr(13) & "We just added " & N & " elements of our two vectors in " & N & " parallel threads.")
            ' This used a bit more precious GPU memory than the earlier examples, so let's free it
            '#End Region
            Form1.RichTextBox1.AppendText(Chr(13) & watch.ElapsedMilliseconds)
        Catch cle As CudafyLanguageException
        Catch cce As CudafyCompileException
        Catch che As CudafyHostException
        End Try

    End Sub

    <Cudafy()> _
    Private Sub TimeStepMark2(ByVal thread As GThread, ByVal IncliN() As Double, ByVal RaaN() As Double, ByVal ARgP() As Double, ByVal RadiuS() As Double, ByVal LaT() As Double, ByVal LonGG() As Double, ByVal INCUBE() As Double, ByVal radiuseperation As Double, ByVal latseperation As Double, ByVal longseperation As Double)
        Dim tid As Integer = thread.blockIdx.x

        If tid < IncliN.Length Then
            Dim phi As Double
            Dim thett As Double

            Dim x As Double
            Dim y As Double
            Dim z As Double

            Dim tempx As Double
            Dim tempy As Double
            Dim tempz As Double

            phi = Rnd() * Math.PI * 2 + ARgP(tid)
            thett = IncliN(tid)

            x = RadiuS(tid) * Math.Cos(phi)
            y = RadiuS(tid) * Math.Sin(phi)
            z = 0

            tempx = Math.Cos(phi) * x - Math.Sin(phi) * Math.Cos(thett) * y
            tempy = Math.Sin(phi) * x + Math.Cos(phi) * Math.Cos(thett) * y
            tempz = Math.Sin(thett) * y

            x = tempx
            y = tempy
            z = tempz

            Dim tempRadius As Double
            Dim TempThett As Double
            Dim tempPhi As Double

            tempRadius = Math.Sqrt(x ^ 2 + y ^ 2 + z ^ 2)
            TempThett = Math.Acos(z / tempRadius)
            tempPhi = Math.Atan(y / x)

            LaT(tid) = TempThett
            LonGG(tid) = tempPhi

            Dim a As Double
            Dim b As Double
            Dim c As Double
            Dim d As Double
            Dim f As Double
            Dim cubetemp As Double

            a = Math.Floor((RadiuS(tid) - reee) / radiuseperation)
            b = Math.Floor(Math.PI / latseperation)
            c = Math.Floor(2 * Math.PI / longseperation)
            d = Math.Floor(LaT(tid) / latseperation)
            f = Math.Floor(LonGG(tid) / longseperation)
            cubetemp = a * b * c + d * c + f

            INCUBE(tid) = cubetemp

        End If
    End Sub

I can't tell why it's throwing the error. I know the error comes from this line:

Dim km As CudafyModule = CudafyTranslator.Cudafy()

But otherwise I'm stumped. Any help would be majorly appreciated. If I've not given enough info please feel free to ask. I'm hoping to implement a group of subs that do calculations similar to this so if you can explain the difference between the correct way and my way that would be great too!


Thanks in advanced everyone!

Oct 14, 2012 at 2:09 PM

Make sure that the methods you are cudafying are static.  This is called "shared" in VB.

Oct 14, 2012 at 3:55 PM

Ah! Thanks that got me past that error.


Any idea how to use rnd() as that's throwing an error now :)

Oct 16, 2012 at 1:38 PM

Can you post some code?

Oct 16, 2012 at 2:00 PM

It's on the above code about 3/4 of the way down, this line:


phi = Rnd() * Math.PI * 2 + ARgP(tid)

I've found a way around this (passing an array of random numbers to the code as opposed to making the numbers in the sub) ideally I'd like it to work as above though as it'll save more time! :D


Thanks for responding again! :D

Oct 16, 2012 at 2:33 PM

You mean the cudafying fails?  I guess it does not know what Rnd() is.  Take a look at CURANDTests.cs and the Cudafy.Host.UnitTests project and CURANDHostTests.cs in Cudafy.Math.UnitTests to get an idea of what is possible with random numbers.  A quick review of the NVIDIA docs will not go amiss either.