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Integrated GPU not getting enumerated

Question asked by thejascr on Mar 7, 2012
Latest reply on Oct 8, 2012 by jobadal

Hi,

 

I have a AMD A8-3850 fusion APU and a PCIex based ATI firepro v4800 Graphics Card.

I have installed the AMD APP SDK 2.6 with Latest ATI catalyst driver 12.1 (I have checked the driver conformance).

The machine runs ubuntu 11.10.

 

I needed couple of clarifications regarding the way the integrated GPU (on-chip) should behave.

 

1. It should be enumerated as another GPU device..right? i,e If I do clinfo, I should be seeing

   two GPU devices and 1 CPU device..is that correct?

 

2. If the answer to the above question is yes, then I am seeing a problem. When I run clinfo,

   I see only one GPU device (the external one) and one CPU device. I am not able to see

   the APU's integrated gpu getting enumerated.

 

   I also tried running the "SimpleMultidevice" program from the AMD kit sample. (I modified it slightly to

   list the number of GPU and CPU devices. Here is the ouput.

 

   numGPUDevices 1 numCPUDevices 1

   ----------------------------------------------------------

   CPU + GPU Test 1 : Single context Single Thread

   ----------------------------------------------------------

   Total time : 74

   Time of CPU : 73.3002

   Time of GPU : 14.6531

   ----------------------------------------------------------

   CPU + GPU Test 2 : Multiple context Single Thread

   ----------------------------------------------------------

   Total time : 74

   Time of CPU : 77.6433

   Time of GPU : 14.5721

   ----------------------------------------------------------

   CPU + GPU Test 3 : Multiple context Multiple Thread

   ----------------------------------------------------------

   Total time : 74

   Time of CPU : 73.3301

   Time of GPU : 14.5074

 

 

   It is able to see only one GPU device. Can someone please clarify as to what might have gone wrong here?

   Previous couple of posts related to this issue have gone unanswered.

 

    Below I am pasting the output of clinfo

   

============================clinfo output===================================================================

 

 

Number of platforms:                                         1

  Platform Profile:                                         FULL_PROFILE

  Platform Version:                                         OpenCL 1.1 AMD-APP (851.4)

  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:                                         2

  Device Type:                                                   CL_DEVICE_TYPE_GPU

  Device ID:                                                   4098

  Board name:                                                   ATI FirePro V4800 (FireGL) Graphics Adapter

  Device Topology:                                         PCI[ B#1, D#0, F#0 ]

  Max compute units:                                         5

  Max work items dimensions:                               3

    Max work items[0]:                                         256

    Max work items[1]:                                         256

    Max work items[2]:                                         256

  Max work group size:                                         256

  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:                                         0Mhz

  Address bits:                                                   32

  Max memory allocation:                               134217728

  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:                               1024

  Alignment (bits) of base address:                     2048

  Minimum alignment (bytes) for any datatype:           128

  Single precision floating point capability

    Denorms:                                                   No

    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:                                                   None

  Cache line size:                                         0

  Cache size:                                                   0

  Global memory size:                                         536870912

  Constant buffer size:                                         65536

  Max number of constant args:                               8

  Local memory type:                                         Scratchpad

  Local memory size:                                         32768

  Kernel Preferred work group size multiple:           64

  Error correction support:                               0

  Unified memory for Host and Device:                     0

  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:                                                   0x7f0eb2ac3100

  Name:                                                             Redwood

  Vendor:                                                   Advanced Micro Devices, Inc.

  Device OpenCL C version:                               OpenCL C 1.1

  Driver version:                                         CAL 1.4.1664

  Profile:                                                   FULL_PROFILE

  Version:                                                   OpenCL 1.1 AMD-APP (851.4)

  Extensions:                                                   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_3d_image_writes cl_khr_byte_addressable_store cl_khr_gl_sharing cl_ext_atomic_counters_32 cl_amd_device_attribute_query cl_amd_vec3 cl_amd_printf cl_amd_media_ops cl_amd_popcnt

 

 

 

 

  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:                                                   65536

  Global memory size:                                         8369086464

  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:                                                   0x7f0eb2ac3100

  Name:                                                             AMD A8-3850 APU with Radeon(tm) HD Graphics

  Vendor:                                                   AuthenticAMD

  Device OpenCL C version:                               OpenCL C 1.1

  Driver version:                                         2.0

  Profile:                                                   FULL_PROFILE

  Version:                                                   OpenCL 1.1 AMD-APP (851.4)

  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

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