7 Replies Latest reply on Apr 28, 2012 12:33 AM by jatinderkaur

    Beginning with Parallel Programming


      Hello everyone, I am new to parallel programming. But till now I have discovered that

      we can use GPUs to enhance performance of computing as GPUs can have 100s of cores.

      As in market there are two major vendors and developers of GPUs i.e NIVIDIA and AMD

      .NIVIDIA makes use of CUDA whereas AMD uses streams. OpenCl(Open Computing Language) can be used on both. As I have HP laptop having GPU of AMD (Radeon HD 6470). I am using AMD APP SDK. But I am not sure about GPU I am using will support or not.It is not in the list of supported GPUs on AMD website.

      Can I start parallel programming without GPU? I am using Fedora Linux for same purpose. Can anyone help in this regard?

        • Re: Beginning with Parallel Programming

          AMD Supports OpenCL for your GPU . Additionally, you can use our OpenCL CPU implementation.

          To discover available devices call from the command shell: clinfo .

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            • Re: Beginning with Parallel Programming

              thx for your reply . I am using Fedora (3.3.2-6-fc16.x86_64). On this operating system

              I am unable to install ATI Catalyst driver provided on this site which is prerequisite for installing AMD APP SDK.

              • Re: Beginning with Parallel Programming

                Thx Thx Thx.


                I have installed AMD APP SDK and after running clinfo command got this o/p:


                [root@localhost preetgill]# clinfo

                Number of platforms:                 1

                  Platform Profile:                 FULL_PROFILE

                  Platform Version:                 OpenCL 1.1 AMD-APP (831.4)

                  Platform Name:                 AMD Accelerated Parallel Processing

                  Platform Vendor:                 Advanced Micro Devices, Inc.

                  Platform Extensions:                 cl_khr_icd cl_amd_event_callback cl_amd_offline_devices



                  Platform Name:                 AMD Accelerated Parallel Processing

                Number of devices:                 1

                  Device Type:                     CL_DEVICE_TYPE_CPU

                  Device ID:                     4098

                  Board name:                    

                  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

                  Native vector width char:             16

                  Native vector width short:             8

                  Native vector width int:             4

                  Native vector width long:             2

                  Native vector width float:             4

                  Native vector width double:             0

                  Max clock frequency:                 800Mhz

                  Address bits:                     64

                  Max memory allocation:             2147483648

                  Image support:                 Yes

                  Max number of images read arguments:         128

                  Max number of images write arguments:         8

                  Max image 2D width:                 8192

                  Max image 2D height:                 8192

                  Max image 3D width:                 2048

                  Max image 3D height:                 2048

                  Max image 3D depth:                 2048

                  Max samplers within kernel:             16

                  Max size of kernel argument:             4096

                  Alignment (bits) of base address:         1024

                  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:                 Yes

                    Round to +ve and infinity:             Yes

                    IEEE754-2008 fused multiply-add:         Yes

                  Cache type:                     Read/Write

                  Cache line size:                 64

                  Cache size:                     32768

                  Global memory size:                 4092624896

                  Constant buffer size:                 65536

                  Max number of constant args:             8

                  Local memory type:                 Global

                  Local memory size:                 32768

                  Kernel Preferred work group size multiple:     1

                  Error correction support:             0

                  Unified memory for Host and Device:         1

                  Profiling timer resolution:             1

                  Device endianess:                 Little

                  Available:                     Yes

                  Compiler available:                 Yes

                  Execution capabilities:                

                    Execute OpenCL kernels:             Yes

                    Execute native function:             Yes

                  Queue properties:                

                    Out-of-Order:                 No

                    Profiling :                     Yes

                  Platform ID:                     0x7f3f21715120

                  Name:                         Intel(R) Core(TM) i3-2330M CPU @ 2.20GHz

                  Vendor:                     GenuineIntel

                  Device OpenCL C version:             OpenCL C 1.1

                  Driver version:                 2.0

                  Profile:                     FULL_PROFILE

                  Version:                     OpenCL 1.1 AMD-APP (831.4)

                  Extensions:                     cl_khr_fp64 cl_amd_fp64 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_int64_base_atomics cl_khr_int64_extended_atomics cl_khr_byte_addressable_store cl_khr_gl_sharing cl_ext_device_fission cl_amd_device_attribute_query cl_amd_vec3 cl_amd_printf cl_amd_media_ops cl_amd_popcnt



                But I think It has not detected GPU.


                Can you plz help me again.