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Type: Posts; User: jai

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    clflush or clfinish

    when to use clfinish or clflush or nothing, if i have single command_queue .
    thanks
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    Re: havin error code -38 in opencl ?

    sorry this statement mis written it contains CL_MEM_WRITE_ONLY

    d_C=clCreateBuffer(context,CL_MEM_WRITE_ONLY,N*sizeof(float),c,NULL);
    rest is same in above question
    thanks
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    Re: havin error code -38 in opencl ?

    i have solved the problem by writing NULL in destination array in which i am storing the value of addition of two source arrays value,i am posting the code but pls help me to tell the reason why it...
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    havin error code -38 in opencl ?

    hi
    i am having error code -38 when i print err or status of clEnqueueReadBuffer (.....)
    pls help what does it mean?
    thanks
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    Re: how i create the memory for block or workgroup

    ok thanks for detailed and useful ans, i have gpu of nvidia having 96 cores and 2 multiprocessor ,win 7 64 bit and visual studio 2010. now how can i set workgroup size so particular amount of...
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    Re: how i create the memory for block or workgroup

    okkk but how can i do it programmatically if u tell it would help a lot,
    thanks
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    Re: how i create the memory for block or workgroup

    means if i have to decide size of workgroup manually,how can i do it and what is the size of work group is set by default in opencl
    thanks
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    Re: Query Memory used on GPU

    what is the difference between
    cl_mem input = clCreateBuffer(context,CL_MEM_READ_ONLY,sizeof(float) * DATA_SIZE, NULL, NULL);
    clEnqueueWriteBuffer(command_queue, input, CL_TRUE, 0, sizeof(float) *...
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    how i create the memory for block or workgroup

    how can i create the buffer for work group or block on the gpu so that i can execute threads by work item.
    thanks
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    "Failed to open file for reading: in program

    I am getting this error "Failed to open file for reading:"
    pls clarify why i am getting this error while kernel file and .cpp file is in same project/folder using nvidia GPU ,win 7 64 bit,vs...
  11. specified file is not unrecognized or unsupported binary fmt

    whenever i run the project solution of oclMatrixmul given by NVIDIA GPU Computing SDK 4.2>openCL>oclMatrixMul
    when i run the solution
    i see the error
    unable to start program...
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    difference between fopen and fopen_s

    what is the difference between fopen and fopen_s in .cpp files
    please ans
    thanks
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    shared memory question

    If shared memory is 16 kb then each and every block of SM has 16 kb or all the blocks in SM has access to this common 16 kb . pls clarify.........
    thanks
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    Re: how to differentiate between two GPU

    ok if i have to use any particular GPU say NVIDIA, from AMD and NVIDIA from the system then what function i can use......
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    how to differentiate between two GPU

    if i have two GPU say intel and Nvidia in my system, how can i know which GPU i am using and how i can select particular GPU for use in openCL.
    thanks
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    Re: why CPU execution time is less than GPU time?

    in this program
    (Intel i -5 3rd generation) CPU execution time is 750 ms ,while nvidia GPU takes 900 ms

    why it is happening while GPU time should take less time than CPU time.
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    why CPU execution time is less than GPU time?

    // Hello.cpp : Defines the entry point for the console application.
    //

    #include "stdafx.h"
    #include<stdio.h>
    #include<stdlib.h>
    #include<time.h>
    #include "CL/cl.h"
    #define DATA_SIZE 10...
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    program run on CPU and GPU

    if i run the program on CPU having say 2 cores,which i ran on gpu having many cores and in program all threads ran simultaneously,but .how it will be run on CPU? if same program is run on both GPU...
  19. Re: how to calculate execution time of program on GPU and CP

    ok thanks but if i have to compare between CPU and GPU time.what time should i consider means time from "sending the command form CPU to GPU -to- read the result from CPU in its memory.or the...
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    Re: Program run on CPU with 2 core....

    i am using nvidia ,intel i5.....
    in CPU one core handle two thread or one thread at a time.
  21. Re: how to calculate execution time of program on GPU and CP

    i am using opencl c and os windows 7
  22. Re: how to calculate execution time of program on GPU and CP

    ok thanks
    but i am new to openCL ,pls give information via which functions or any example regarding this can help much.
  23. how to calculate execution time of program on GPU and CPU?

    what to write and where to write, to calculate execution time of the program in openCL
    thanks
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    Re: Program run on CPU with 2 core....

    like if i am use intel core 2 Duo processor......
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    Program run on CPU with 2 core....

    if i run the program on CPU having 2 cores,which i ran on gpu having many cores and in cycles all threads ran simultaneously,but .how it will be run on CPU? if there are more than 2 threads are...
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