Hi
Sorry for troubling you again 😂! For my final object that implement sparse
linear system of CFD with matlab and viennaCL platform, I tested the
example file wrap_csr_cuda. cu, and found that the csr format matrix vel_A
is clear, but not the device vector vel_x definition. Why there is
"viennacl::traits::context(vel_A) here? Is it essetial? I don't find it
in the user manual.
Best regards
Jingbo
2016年4月10日 17:22，"侠贵族" <[email protected]>写道：
Hi karl
Thanks for your reply! Yes, it works as your suggestion, and we should not
modify the const double pointers after cast them to non-const pointers!
Best regards
Jingbo
2016-04-10 17:45 GMT+09:00 Karl Rupp <[email protected]>:
> Hi,
>
> if the issue is with const vs. non-const, cast the const-pointer you
> receive from Matlab to a non-const pointer.
>
> Best regards,
> Karli
>
>
> On 04/09/2016 07:54 PM, 侠贵族 wrote:
>
>> Thanks for reply! I wrote the wrap code similar as example in viennacl
>> source,
>> viennacl::vector<double> vec1("device pointer from matlab mxgpuarray
>> method", viennacl::cudamemory, size). It should fit the syntax, I think
>> so.
>>
>> 2016年4月10日 01:37，"Omar Valerio" <[email protected]
>> <mailto:[email protected]>>写道：
>>
>> Hello,
>>
>> From the compiler error message. It seems the class constructor
>> requires two parameters and you are using it with only one.
>>
>> Am Samstag, 9. April 2016 schrieb 侠贵族 :
>>
>> Hi karl
>> For these days, I tried to combine Mathematica and viennaCL to
>> get a develop platform. However, Mathematica use its exclusive
>> CudaMemory mechanism provided a integer ID from which I can't
>> get raw device pointers not right now, anyway. I have to change
>> to Matlab and it offers a ready mxGPUArray methods to extract
>> raw device pointer and wrap it again to Matlab's gpuArray
>> object. But when I test a easy example like c = a+b (a,b,c are
>> device vectors), I face errors:
>>
>> D:/DevelopeTools/Workspace/Matlab_ViennaCL/test.cu
>> <http://test.cu>(84): error: no instance of constructor
>> "viennacl::vector<NumericT, AlignmentV>::vector [with
>> NumericT=double,
>> AlignmentV=1U]" matches the argument list
>> argument types are: (const double *,
>> viennacl::memory_types, int)
>> ....
>>
>> My point is, in matlabthe mexfunction
>> void mexFunction(int nlhs, mxArray *plhs[],
>> int nrhs, mxArray const *prhs[]){
>> ...}, the *prhs[] must const to avoid unpredictable errors. but
>> in viennaCL
>> vector.hpp/matrix.hpp/compressed_matrix..., there are
>> not constructor to include const double * type. Am I right? How
>> to add a match statement in these .hpp files to solve the problem?
>>
>> I attached my test files.
>>
>> Best wishes
>> Jingbo
>>
>>
>>
>>
>> ------------------------------------------------------------------------------
>> Find and fix application performance issues faster with Applications
>> Manager
>> Applications Manager provides deep performance insights into multiple
>> tiers of
>> your business applications. It resolves application problems quickly and
>> reduces your MTTR. Get your free trial! http://pubads.g.doubleclick.net/
>> gampad/clk?id=1444514301&iu=/ca-pub-7940484522588532
>>
>>
>>
>> _______________________________________________
>> ViennaCL-support mailing list
>> [email protected]
>> https://lists.sourceforge.net/lists/listinfo/viennacl-support
>>
>>
>
------------------------------------------------------------------------------
Find and fix application performance issues faster with Applications Manager
Applications Manager provides deep performance insights into multiple tiers of
your business applications. It resolves application problems quickly and
reduces your MTTR. Get your free trial! http://pubads.g.doubleclick.net/
gampad/clk?id=1444514301&iu=/ca-pub-7940484522588532
_______________________________________________
ViennaCL-support mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/viennacl-support
