4 Replies Latest reply on May 4, 2011 5:19 AM by himanshu.gautam

    clInfo Bug [NEXT-RELEASE-FIX]

    dragonxi4amd
      Device IDs returned by clInfo are not uniques !

      In most systems IDs identify resources and are unique in the system i.e.no other resource has the same ID.

      Unique IDs make it possible for example to create databases and build relations so that data is not replicated to manage resources such as devices.

      IDs are NOT unique in AMDs OpenCL implementation.

      Why not URI = Unique Resouce Identification for resourced such as platforms and devices ?

      Note: object attributes such as type should not be needed for identification purposes nor any complicated heuristics to detect a device!

       

        • URI proposal to replace IDs [Open]
          himanshu.gautam

          hi d,

          Are you saying that you get same deviceID values for two different devices or get same platformID value for different platforms.

          Can you please give details of what system you were experimenting on. CPU(s),GPU(s),SDK(s),Driver(s),OS.

          Thanks

            • Details for IDs
              dragonxi4amd

              Thanks for examining this question!

              Device ID is the same both for CPU and GPU in the following configuration,

              where OS = 64-bit Windows 7 

               

               Number of platforms:     1
                Platform Profile:     FULL_PROFILE
                Platform Version:     OpenCL 1.1 ATI-Stream-v2.3 (451)
                Platform Name:     ATI Stream
                Platform Vendor:     Advanced Micro Devices, Inc.
                Platform Extensions:     cl_khr_icd cl_amd_event_callback cl_amd_offline_devices cl_khr_d3d10_sharing


                Platform Name:     ATI Stream
                Number of devices:     2
                Device Type:      CL_DEVICE_TYPE_GPU
                Device ID:      4098
                Max compute units:     10
                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:    0
                Native vector width short:    0
                Native vector width int:    0
                Native vector width long:    0
                Native vector width float:    0
                Native vector width double:    0
                Max clock frequency:     750Mhz
                Address bits:      32
                Max memory allocation:    134217728
                Image support:     No
                Max size of kernel argument:    1024
                Alignment (bits) of base address:   32768
                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:     Global
                Local memory size:     16384
                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:      0000000001509568
                Name:       ATI RV770
                Vendor:      Advanced Micro Devices, Inc.
                Driver version:     CAL 1.4.900
                Profile:      FULL_PROFILE
                Version:      OpenCL 1.0 ATI-Stream-v2.3 (451)
                Extensions:      cl_amd_fp64 cl_khr_gl_sharing cl_amd_device_attribute_query cl_khr_d3d10_sharing


                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
                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:     3210Mhz
                Address bits:      64
                Max memory allocation:    1073741824
                Image support:     No
                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:   No
                Cache type:      Read/Write
                Cache line size:     64
                Cache size:      65536
                Global memory size:     3221225472
                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:    318
                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:      0000000001509568
                Name:       AMD Phenom(tm) II X4 955 Processor
                Vendor:      AuthenticAMD
                Driver version:     2.0
                Profile:      FULL_PROFILE
                Version:      OpenCL 1.1 ATI-Stream-v2.3 (451)
                Extensions:      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_media_ops cl_amd_popcnt cl_amd_printf cl_khr_d3d10_sharing

               

                • URI proposal to replace IDs [Open]
                  hduregger

                  same here with 64bit Ubuntu Linux and Catalyst 11.2, but AMD APP SDK 2.4:

                  Number of platforms:                 1
                    Platform Profile:                 FULL_PROFILE
                    Platform Version:                 OpenCL 1.1 AMD-APP-SDK-v2.4 (595.10)
                    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
                    Max compute units:                 22
                    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:                 840Mhz
                    Address bits:                     32
                    Max memory allocation:             268435456
                    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:         32768
                    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:                 1073741824
                    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:                     0x7fca3a252800
                    Name:                         Cayman
                    Vendor:                     Advanced Micro Devices, Inc.
                    Driver version:                 CAL 1.4.1016
                    Profile:                     FULL_PROFILE
                    Version:                     OpenCL 1.1 AMD-APP-SDK-v2.4 (595.10)
                    Extensions:                     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_3d_image_writes cl_khr_byte_addressable_store cl_khr_gl_sharing cl_amd_device_attribute_query cl_amd_printf cl_amd_media_ops cl_amd_popcnt


                    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
                    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:         No
                    Cache type:                     Read/Write
                    Cache line size:                 64
                    Cache size:                     65536
                    Global memory size:                 4154441728
                    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:                     0x7fca3a252800
                    Name:                         AMD Phenom(tm) II X4 920 Processor
                    Vendor:                     AuthenticAMD
                    Driver version:                 2.0
                    Profile:                     FULL_PROFILE
                    Version:                     OpenCL 1.1 AMD-APP-SDK-v2.4 (595.10)
                    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_media_ops cl_amd_popcnt cl_amd_printf

                   

                  • Details for IDs
                    himanshu.gautam

                    From the clInfo code, I find that we are actually displaying the Device Vendor String. I guess the metric written there should more appropriately be renamed.

                    As far your unique ID is concerned try using the cl_device_id* returned by clGetDeviceID.

                    Thanks for reporting the issue. i will see it gets fixed in clInfo.