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[pavandsp]

 cl_platform_id* platforms = (cl_platform_id *)malloc(numPlatforms*sizeof(cl_platform_id));

numPlatforms=1;
        status = clGetPlatformIDs(numPlatforms, platforms, NULL);
        if(status != CL_SUCCESS)
        {
            printf("Error: Getting Platform Ids. (clGetPlatformsIDs)\n");
            return 1;
        }

printf("platforms ID::%d\n",platforms[0]);

I am getting weired value:numofp

platforms ID: :-1210489720

What type of ID values are expected here.I am getting -ve number.

I working on AMD CPU , Radeon HD4350 GPU ,Ubuntu 9.04 32 bit ,SDK v2.01.

[omkaranathan]

You are trying to print pointer address as int. You have to use %p to print pointer address.

[pavandsp]

Thanks Omkar,

I got platforms ID: 0xb7d1b488 ..is it right? bythe way where is %p defined..I didn't see it in C-lang.Why is this ID values gets changed every time of execution ...is thats becaz of some random iD generator internally.

Also how abt "cl_device_type" print specifier?

Just adding one more clarifications:

cl_uint num_devices;

status=clGetDeviceIDs(platform,CL_DEVICE_TYPE_ALL,0,NULL,&num_devices);
printf(" num of devices=%d",num_devices);

I am getting num_of_devices as 1 .but my config is having AMD CPU And Radeon GPU.It should give  2 right?

Thanks in Advance.

Pavan

[nou]

clGetPlatformID return pointer to platform. and pointers are runtime dependent.

and yes you should get 2 devices. try run FindNumDevices from CAL samples directory in which is in SDK. if get zero then you need reinstall catalyst driver.

[pavandsp]

Thanks nou,

I  ran FindNumDevices from cal/bin/x86 and got the Device Count = 1.

what does it mean...is it saying only AMD CPU available?

then why is my OpenCL not recognizing the GPU

-ALSO Please confirm whether the above platform ID value is right  in general?I assumed it should be 1,2,3...and so on.

[omkaranathan]

CAL samples detect the GPU only.

Could you post the output of CLInfo Sample?

[nou]

what CPU do you have? CPU must support SSE 3

[pavandsp]

I have AMD Phenom(tm) II X4 810 Processor and I guess this supports SSE.But still OpenCL is unable to detect ATI HD radeon 4350 GPU plugged in my PCI slot

[pavandsp]

Hi Omkar,Please find the output og CLinfo

root@work:/home/work/gpu/ati-stream-sdk-v2.01-lnx32/samples/opencl/bin/x86# ./CLInfo
*** CAL version mismatch:
This OpenCL build requires version 1.4.467, version 1.4.255 installed.
Aborting.
Number of platforms:                 1
  Plaform Profile:                 FULL_PROFILE
  Plaform Version:                 OpenCL 1.0 ATI-Stream-v2.0.1
  Plaform Name:                     ATI Stream
  Plaform Vendor:                 Advanced Micro Devices, Inc.
  Plaform Extensions:             cl_khr_icd


  Plaform Name:                     ATI Stream
Number of devices:                 1
  Device Type:                     CL_DEVICE_TYPE_CPU
  Device ID:                     4098
  Max compute units:                 4
  Max work items dimensions:             3
    Max work items[0]:                 1024
    Max work items[1]:                 1024
    Max work items[2]:                 1024
  Max work group size:                 1024
  Preferred vector width char:             16
  Preferred vector width short:             8
  Preferred vector width int:             4
  Preferred vector width long:             2
  Preferred vector width float:             4
  Preferred vector width double:         0
  Max clock frequency:                 800Mhz
  Address bits:                     32
  Max memeory allocation:             536870912
  Image support:                 No
  Max size of kernel argument:             4096
  Alignment (bits) of base address:         32768
  Minimum alignment (bytes) for any datatype:     128
  Single precision floating point capability
    Denorms:                     Yes
    Quiet NaNs:                     Yes
    Round to nearest even:             Yes
    Round to zero:                 No
    Round to +ve and infinity:             No
    IEEE754-2008 fused multiply-add:         No
  Cache type:                     Read/Write
  Cache line size:                 64
  Cache size:                     65536
  Global memory size:                 1073741824
  Constant buffer size:                 65536
  Max number of constant args:             8
  Local memory type:                 Global
  Local memory size:                 32768
  Profiling timer resolution:             1
  Device endianess:                 Little
  Available:                     Yes
  Compiler available:                 Yes
  Execution capabilities:                 
    Execute OpenCL kernels:             Yes
    Execute native function:             No
  Queue properties:                 
    Out-of-Order:                 No
    Profiling :                     Yes
  Platform ID:                     0xb7cc9488
  Name:                         AMD Phenom(tm) II X4 810 Processor
  Vendor:                     AuthenticAMD
  Driver version:                 1.0
  Profile:                     FULL_PROFILE
  Version:                     OpenCL 1.0 ATI-Stream-v2.0.1
  Extensions:                     cl_khr_icd cl_khr_global_int32_base_atomics cl_khr_global_int32_extended_atomics cl_khr_local_int32_base_atomics cl_khr_local_int32_extended_atomics cl_khr_byte_addressable_store

even in OpenCl samples ,Number of devices:                 1.

[omkaranathan]

pavandsp,

Seems you are having old drivers. You need to install Catalyst 10.2 drivers to get SDK2.01 working.

[pavandsp]

Hi Omkar & Nou ,

Thanks for the help .

I installed Catalyst 10.2 drivers and I could see my OpenCL detecting the GPU.