Mathematica 9 is now available
Services & Resources / Wolfram Forums / MathGroup Archive
-----

MathGroup Archive 2011

[Date Index] [Thread Index] [Author Index]

Search the Archive

Re: nVidia Optumus prevents using CUDA?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg122789] Re: nVidia Optumus prevents using CUDA?
  • From: DmitryG <einschlag at gmail.com>
  • Date: Thu, 10 Nov 2011 06:55:26 -0500 (EST)
  • Delivered-to: l-mathgroup@mail-archive0.wolfram.com
  • References: <j8nuj1$ee5$1@smc.vnet.net> <j8r9hu$3jk$1@smc.vnet.net> <j90gjt$sff$1@smc.vnet.net>

On Nov 4, 6:00 am, "Oleksandr Rasputinov"
<oleksandr_rasputi... at hmamail.com> wrote:
> On Thu, 03 Nov 2011 08:48:48 -0000, DmitryG <einsch... at gmail.com> wrote:
> > On Nov 2, 4:29 am, "Oleksandr Rasputinov"
> > <oleksandr_rasputi... at hmamail.com> wrote:
> >> On Tue, 01 Nov 2011 05:03:29 -0000, DmitryG <einsch... at gmail.com> wrote:
> >> > Hi All,
>
> >> > Being interested in GPU computations, I have bought a new powerful
> >> > laptop Lenovo Y570 ($1080) that has, according to my test today, a
> >> > 1.05 Mathematica 8.0.4 benchmark, under Windows 7 64 bit.
>
> >> > The main reason to buy this laptop was that it has nVidia Geforce 555M
> >> > graphic card that is one of the best in the consumer range and has 96
> >> > CUDA cores.
>
> >> > I have got the new Mathematica 8.0.4 activated today and the first
> >> > thing was to try out CUDA. To my disappointment, it appears that
> >> > Mathematica does not see the nVidia GPU at all, and all that it sees
> >> > is the integrated Intel HD graphics. Thus CUDAInformation[] command
> >> > outputs "CUDAInformation::invdevnm: "CUDA is not supported on device
> >> \!
> >> > \(\"Intel(R) HD Graphics Family\"\)."
>
> >> > I know that there is nVidiaOptimusmanager that tries to redistribute
> >> > the load between the integrated HD graphics and the nVidia GPU. Also
> >> > there is a hardware switch in my laptop to activate or deactivate the
> >> > GPU. Thus I have GPU activated per this switch and also in the "Manage
> >> > 3D settings -> Global settings" of the nVidia control panel I have
> >> > checked nVidia as the preferred graphic processor (other options are
> >> > Automatic and integrated HD graphics). However, this did not bring
> >> > anything to the way Mathematica works with CUDA.
>
> >> > I do not know if the above is related to another disappointment. I
> >> > have installed Microsoft Visual C++ 2010 express, as on my previous
> >> > Win 7 64 bit laptop (that has a too old nVidia card, though) and it
> >> > turned out that it does not work with Mathematica. Even the command
> >> > CCompilers[Full] does not say that Microsoft Visual can be installed
> >> > on my system, there are only Intel Compiler and a generic C compiler
> >> > in the list. I don't know why there is such a difference with my
> >> > previous laptop. I have checked Windows SDK and it is installed. What
> >> > else?
>
> >> > It seems that there is some relation between CUDa and C compiler,
> >> > maybe a C compiler is a prerequisite for CUDA?
>
> >> > It appears I have serious problems with Mathematica on my new laptop,
> >> > and any advice will be appreciated.
>
> >> > Dmitry
>
> >> I won't comment on the CUDA issue as it's not something that I'm
> >> familiar
> >> with. However, I have had Visual C++ 2010 working with Mathematica
> >> (8.0.1;
> >> I haven't got 8.0.4 yet) without difficulty. The installation is
> >> slightly
> >> convoluted; here are my notes on the matter:
>
> >> Minimal installation of Microsoft Visual C++ 10.0 (2010) SP1
>
> >> Note that this installation does not include the Visual Studio IDE,
> >> help,
> >> tools, etc. Only the build system, compilers, headers, and libraries
> >> will
> >> be installed.
>
> >> 1. Get the Microsoft Windows SDK 7.1 for Windows 7 and .NET Framework 4:
>
> >>    http://www.microsoft.com/download/en/details.aspx?id=8442
>
> >> 2. From the SDK, install at least the headers and libraries, but do not
> >> install the compilers. The headers and libraries will be installed for
> >> the
> >> x86, x64, and IA64 platforms. To keep the installation self-contained,
> >> and
> >> for for consistency with Visual Studio, one may install to
> >> %ProgramFiles(x86)%\Microsoft Visual Studio 10.0\SDK rather than the
> >> default location.
>
> >> 3. Get the Microsoft Visual C++ 2010 Service Pack 1 Compiler Update for
> >> the Windows SDK 7.1:
>
> >>    http://www.microsoft.com/download/en/details.aspx?id=4422
>
> >> 4. Install the Compiler Update. This will install x86, x64, and IA64
> >> compilers.
>
> >> 5. If support for the IA64 platform is not required, one can remove the
> >> IA64 compiler via Add/Remove Programs (if present there) and then simply
> >> delete all of the directories installed by either the SDK or the
> >> Compiler
> >> Update that contain IA64-specific files. (Note that the Compiler Update
> >> will install the x86-hosted IA64 cross-compiler along with the x86
> >> compiler even if the IA64 compiler itself is not installed.) The
> >> directories to delete can easily be identified since they all have
> >> "IA64"
> >> as part of the name. This saves about 200MB of space. Note that apart
> >> from
> >> the main installation directory, some (small) files are also installed
> >> into %ProgramFiles(x86)%\MSBuild, including some for IA64 in
> >> MSBuild\Microsoft.Cpp\v4.0\Platforms\IA64.
>
> >> 5. After installing, it is recommended to run Microsoft Update in case
> >> any
> >> patches are required.
>
> >> As you see, this does not involve Visual Studio Express, which I
> >> deliberately avoided since it does not include the 64-bit compilers
> >> necessary for operation with Mathematica. Personally, I use MinGW-w64
> >> GCC
> >> 4.6.1 rather than Visual C++; this works perfectly well also but does
> >> require modifications to Mathematica which I will not discuss here other
> >> than to say that it would be nice if this compiler could be supported
> >> without need of modifications in a future release.
>
> > It is unfortunately Mathematica 8.0.4 that does not accept any
> > compilers except of the Intel C Compiler, according to
> > CCompilers[Full]. Checked on Windows 7 and Mac Snow Leopard.
>
> > Dmitry
>
> Don't be too discouraged by CCompilers[Full]. On 8.0.1 I get:
>
> In[2]:= CCompilers[Full]
>
> Out[2]= {{"Name" -> "MinGW",
>    "Compiler" -> CCompilerDriver`MinGWCompiler`MinGWCompiler,
>    "CompilerInstallation" ->
>     "C:\\MinGW-w64\\bin\\x86_64-w64-mingw32-gcc.exe",
>    "CompilerName" -> Automatic}, {"Name" -> "Intel Compiler",
>    "Compiler" -> CCompilerDriver`IntelCompiler`IntelCompiler,
>    "CompilerInstallation" -> None,
>    "CompilerName" -> Automatic}, {"Name" -> "Generic C Compiler",
>    "Compiler" -> CCompilerDriver`GenericCCompiler`GenericCCompiler,
>    "CompilerInstallation" -> None, "CompilerName" -> Automatic}}
>
> (where MinGW reflects my own modifications to work with MinGW-w64; this is
> not standard). As you can see, Visual C++ is missing. But, when I
> installed Visual C++ per the directions above, it did show up in
> CCompilers[] and it did work correctly. Not sure why CCompilers[Full]
> omits it (but you can look at the package source code to find out if
> you're curious).
>
> O. R.

Hi Oleksandr,

I had a number of Microsoft Visual Redistributable files installed on
my computer. Following you above post, I have uninstalled them,
including Microsoft Visual C++ Express. And installed the update to
SDK 7.1 that I already had. Indeed, there are C compilers in this
update and they are now listed among my installed programs. On the HD
now I have

C:\Program Files (x86)\Microsoft Visual Studio 10.0     (contains
cl.exe in "Bin" - this must be the C++ compiler)
C:\Program Files (x86)\Microsoft SDKs\Windows\v7.1     (only
readme_windows_sdk_v71_update.htm inside)
C:\Program Files (x86)\Microsoft.NET
C:\Program Files\Microsoft SDKs\Windows\v7.1


Mathematica 8.0.4 still does not list Microsoft Visual in CCompilers[]
and CCompilers[Full]. I have filed a support ticket today, let's see
what will be the answer.

How can I test independently of Mathematica that the installed C
compilers work on my computer?  I see there is no information about
the installed compiler and the SDK in the Windows Path statement.

Another thing: Mathematica 8.0.4 on my Mac Pro now recognizes GCC
compiler. Thus there is a problem only on my new laptop.

Best,

Dmitry





  • Prev by Date: Re: Import files on accessible URL and save in
  • Next by Date: Re: nVidia Optumus prevents using CUDA?
  • Previous by thread: Re: nVidia Optumus prevents using CUDA?
  • Next by thread: Re: nVidia Optumus prevents using CUDA?