OpenCL

[tluisrs]

In order to enumerate OpenCL platforms in a system, the ICD loader is usually the best option because it allows a platform independent way of having multiple OpenCL implementations in the same system.

The Radeon Software Adrenalin 2019 Edition 19.5.2 Optional will install the OpenCL implementation as well as the ICD loader (OpenCL.dll) and the utility clinfo, however, the bundled version of these binaries are outdated.

The OpenCL ICD loader is supposed to enumerate the different OpenCL platforms available in a system, however, the bundled version does not go over the list of display adapters, as this is one of the ways this needs to be done in Win10, this is the function in the ICD loader responsible for this: 

The Radeon Software does a pretty good job of not removing any entries from the Windows Registry, but in order to support all the platforms I have in my system, I have to manually install the ICD loader, which is not ideal.

Why AMD does not ship the latest version of the ICD loader and the clinfo?

[dipak]

Thank you for reporting this. 

The OpenCL ICD loader is supposed to enumerate the different OpenCL platforms available in a system, however, the bundled version does not go over the list of display adapters

Can you please provide some more information regarding the above issue, such as the platforms or devices that the clinfo was unable to list? It would be helpful if you can attach those two different clinfo outputs here. 

Thanks.

[tluisrs]

In order to reinforce my statement that the bundled ICD loader provided by the AMD Radeon Software installer is outdated, I will provide the output of both the ICD loaders using clinfo version 2.2.18.04.06:

AMD Bundled ICD Loader

Number of platforms 1
 Platform Name AMD Accelerated Parallel Processing
 Platform Vendor Advanced Micro Devices, Inc.
 Platform Version OpenCL 2.1 AMD-APP (2841.5)
 Platform Profile FULL_PROFILE
 Platform Extensions cl_khr_icd cl_khr_d3d10_sharing cl_khr_d3d11_sharing cl_khr_dx9_media_sharing cl_amd_event_callback cl_amd_offline_devices
 Platform Host timer resolution 100ns
 Platform Extensions function suffix AMD

 Platform Name AMD Accelerated Parallel Processing
Number of devices 1
 Device Name Baffin
 Device Vendor Advanced Micro Devices, Inc.
 Device Vendor ID 0x1002
 Device Version OpenCL 2.0 AMD-APP (2841.5)
 Driver Version 2841.5
 Device OpenCL C Version OpenCL C 2.0
 Device Type GPU
 Device Board Name (AMD) Radeon(TM) RX 460 Graphics
 Device Topology (AMD) PCI-E, 01:00.0
 Device Profile FULL_PROFILE
 Device Available Yes
 Compiler Available Yes
 Linker Available Yes
 Max compute units 14
 SIMD per compute unit (AMD) 4
 SIMD width (AMD) 16
 SIMD instruction width (AMD) 1
 Max clock frequency 1212MHz
 Graphics IP (AMD) 8.0
 Device Partition (core)
 Max number of sub-devices 14
 Supported partition types None
 Supported affinity domains (n/a)
 Max work item dimensions 3
 Max work item sizes 1024x1024x1024
 Max work group size 256
 Preferred work group size (AMD) 256
 Max work group size (AMD) 1024
 Preferred work group size multiple 64
 Wavefront width (AMD) 64
 Preferred / native vector sizes
 char 4 / 4
 short 2 / 2
 int 1 / 1
 long 1 / 1
 half 1 / 1 (cl_khr_fp16)
 float 1 / 1
 double 1 / 1 (cl_khr_fp64)
 Half-precision Floating-point support (cl_khr_fp16)
 Denormals No
 Infinity and NANs No
 Round to nearest No
 Round to zero No
 Round to infinity No
 IEEE754-2008 fused multiply-add No
 Support is emulated in software No
 Single-precision Floating-point support (core)
 Denormals No
 Infinity and NANs Yes
 Round to nearest Yes
 Round to zero Yes
 Round to infinity Yes
 IEEE754-2008 fused multiply-add Yes
 Support is emulated in software No
 Correctly-rounded divide and sqrt operations Yes
 Double-precision Floating-point support (cl_khr_fp64)
 Denormals Yes
 Infinity and NANs Yes
 Round to nearest Yes
 Round to zero Yes
 Round to infinity Yes
 IEEE754-2008 fused multiply-add Yes
 Support is emulated in software No
 Address bits 64, Little-Endian
 Global memory size 2147483648 (2GiB)
 Global free memory (AMD) 2046441 (1.952GiB)
 Global memory channels (AMD) 4
 Global memory banks per channel (AMD) 16
 Global memory bank width (AMD) 256 bytes
 Error Correction support No
 Max memory allocation 1597190963 (1.487GiB)
 Unified memory for Host and Device No
 Shared Virtual Memory (SVM) capabilities (core)
 Coarse-grained buffer sharing Yes
 Fine-grained buffer sharing Yes
 Fine-grained system sharing No
 Atomics No
 Minimum alignment for any data type 128 bytes
 Alignment of base address 2048 bits (256 bytes)
 Preferred alignment for atomics
 SVM 0 bytes
 Global 0 bytes
 Local 0 bytes
 Max size for global variable 1437471744 (1.339GiB)
 Preferred total size of global vars 2147483648 (2GiB)
 Global Memory cache type Read/Write
 Global Memory cache size 16384 (16KiB)
 Global Memory cache line size 64 bytes
 Image support Yes
 Max number of samplers per kernel 16
 Max size for 1D images from buffer 134217728 pixels
 Max 1D or 2D image array size 2048 images
 Base address alignment for 2D image buffers 256 bytes
 Pitch alignment for 2D image buffers 256 pixels
 Max 2D image size 16384x16384 pixels
 Max 3D image size 2048x2048x2048 pixels
 Max number of read image args 128
 Max number of write image args 64
 Max number of read/write image args 64
 Max number of pipe args 16
 Max active pipe reservations 16
 Max pipe packet size 1597190963 (1.487GiB)
 Local memory type Local
 Local memory size 32768 (32KiB)
 Local memory syze per CU (AMD) 65536 (64KiB)
 Local memory banks (AMD) 32
 Max number of constant args 8
 Max constant buffer size 1597190963 (1.487GiB)
 Preferred constant buffer size (AMD) 16384 (16KiB)
 Max size of kernel argument 1024
 Queue properties (on host)
 Out-of-order execution No
 Profiling Yes
 Queue properties (on device)
 Out-of-order execution Yes
 Profiling Yes
 Preferred size 262144 (256KiB)
 Max size 8388608 (8MiB)
 Max queues on device 1
 Max events on device 1024
 Prefer user sync for interop Yes
 Profiling timer resolution 1ns
 Profiling timer offset since Epoch (AMD) 1558950738135653600ns (Mon May 27 10:52:18 2019)
 Execution capabilities
 Run OpenCL kernels Yes
 Run native kernels No
 Thread trace supported (AMD) Yes
 Number of async queues (AMD) 2
 Max real-time compute queues (AMD) 2
 Max real-time compute units (AMD) 4
 SPIR versions 1.2
 printf() buffer size 4194304 (4MiB)
 Built-in kernels (n/a)
 Device 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_3d_image_writes cl_khr_byte_addressable_store cl_khr_fp16 cl_khr_gl_sharing cl_khr_gl_depth_images cl_amd_device_attribute_query cl_amd_vec3 cl_amd_printf cl_amd_media_ops cl_amd_media_ops2 cl_amd_popcnt cl_khr_d3d10_sharing cl_khr_d3d11_sharing cl_khr_dx9_media_sharing cl_khr_image2d_from_buffer cl_khr_spir cl_khr_subgroups cl_khr_gl_event cl_khr_depth_images cl_khr_mipmap_image cl_khr_mipmap_image_writes cl_amd_liquid_flash cl_amd_planar_yuv

NULL platform behavior
 clGetPlatformInfo(NULL, CL_PLATFORM_NAME, ...) No platform
 clGetDeviceIDs(NULL, CL_DEVICE_TYPE_ALL, ...) No platform
 clCreateContext(NULL, ...) [default] No platform
 clCreateContext(NULL, ...) [other] Success [AMD]
 clCreateContextFromType(NULL, CL_DEVICE_TYPE_DEFAULT) Success (1)
 Platform Name AMD Accelerated Parallel Processing
 Device Name Baffin
 clCreateContextFromType(NULL, CL_DEVICE_TYPE_CPU) No devices found in platform
 clCreateContextFromType(NULL, CL_DEVICE_TYPE_GPU) Success (1)
 Platform Name AMD Accelerated Parallel Processing
 Device Name Baffin
 clCreateContextFromType(NULL, CL_DEVICE_TYPE_ACCELERATOR) No devices found in platform
 clCreateContextFromType(NULL, CL_DEVICE_TYPE_CUSTOM) No devices found in platform
 clCreateContextFromType(NULL, CL_DEVICE_TYPE_ALL) Success (1)
 Platform Name AMD Accelerated Parallel Processing
 Device Name Baffin

Khronos ICD Loader (from Github)

Number of platforms 2
 Platform Name Intel(R) OpenCL
 Platform Vendor Intel(R) Corporation
 Platform Version OpenCL 2.1 
 Platform Profile FULL_PROFILE
 Platform Extensions cl_khr_3d_image_writes cl_khr_byte_addressable_store cl_khr_depth_images cl_khr_fp64 cl_khr_global_int32_base_atomics cl_khr_global_int32_extended_atomics cl_khr_icd cl_khr_image2d_from_buffer cl_khr_local_int32_base_atomics cl_khr_local_int32_extended_atomics cl_khr_spir
 Platform Host timer resolution 100ns
 Platform Extensions function suffix INTEL

 Platform Name AMD Accelerated Parallel Processing
 Platform Vendor Advanced Micro Devices, Inc.
 Platform Version OpenCL 2.1 AMD-APP (2841.5)
 Platform Profile FULL_PROFILE
 Platform Extensions cl_khr_icd cl_khr_d3d10_sharing cl_khr_d3d11_sharing cl_khr_dx9_media_sharing cl_amd_event_callback cl_amd_offline_devices 
 Platform Host timer resolution 100ns
 Platform Extensions function suffix AMD

 Platform Name Intel(R) OpenCL
Number of devices 2
 Device Name Intel(R) HD Graphics 530
 Device Vendor Intel(R) Corporation
 Device Vendor ID 0x8086
 Device Version OpenCL 2.1 NEO 
 Driver Version 26.20.100.6861
 Device OpenCL C Version OpenCL C 2.0 
 Device Type GPU
 Device Profile FULL_PROFILE
 Device Available Yes
 Compiler Available Yes
 Linker Available Yes
 Max compute units 24
 Max clock frequency 1150MHz
 Device Partition (core)
 Max number of sub-devices 0
 Supported partition types None
 Supported affinity domains (n/a)
 Max work item dimensions 3
 Max work item sizes 256x256x256
 Max work group size 256
 Preferred work group size multiple 32
 Max sub-groups per work group 32
 Sub-group sizes (Intel) 8, 16, 32
 Preferred / native vector sizes 
 char 16 / 16 
 short 8 / 8 
 int 4 / 4 
 long 1 / 1 
 half 8 / 8 (cl_khr_fp16)
 float 1 / 1 
 double 1 / 1 (cl_khr_fp64)
 Half-precision Floating-point support (cl_khr_fp16)
 Denormals Yes
 Infinity and NANs Yes
 Round to nearest Yes
 Round to zero Yes
 Round to infinity Yes
 IEEE754-2008 fused multiply-add Yes
 Support is emulated in software No
 Single-precision Floating-point support (core)
 Denormals Yes
 Infinity and NANs Yes
 Round to nearest Yes
 Round to zero Yes
 Round to infinity Yes
 IEEE754-2008 fused multiply-add Yes
 Support is emulated in software No
 Correctly-rounded divide and sqrt operations Yes
 Double-precision Floating-point support (cl_khr_fp64)
 Denormals Yes
 Infinity and NANs Yes
 Round to nearest Yes
 Round to zero Yes
 Round to infinity Yes
 IEEE754-2008 fused multiply-add Yes
 Support is emulated in software No
 Address bits 64, Little-Endian
 Global memory size 13692215296 (12.75GiB)
 Error Correction support No
 Max memory allocation 4294959104 (4GiB)
 Unified memory for Host and Device Yes
 Shared Virtual Memory (SVM) capabilities (core)
 Coarse-grained buffer sharing Yes
 Fine-grained buffer sharing Yes
 Fine-grained system sharing No
 Atomics Yes
 Minimum alignment for any data type 128 bytes
 Alignment of base address 1024 bits (128 bytes)
 Preferred alignment for atomics 
 SVM 64 bytes
 Global 64 bytes
 Local 64 bytes
 Max size for global variable 65536 (64KiB)
 Preferred total size of global vars 4294959104 (4GiB)
 Global Memory cache type Read/Write
 Global Memory cache size 524288 (512KiB)
 Global Memory cache line size 64 bytes
 Image support Yes
 Max number of samplers per kernel 16
 Max size for 1D images from buffer 268434944 pixels
 Max 1D or 2D image array size 2048 images
 Base address alignment for 2D image buffers 4 bytes
 Pitch alignment for 2D image buffers 4 pixels
 Max 2D image size 16384x16384 pixels
 Max planar YUV image size 16384x16352 pixels
 Max 3D image size 16384x16384x2048 pixels
 Max number of read image args 128
 Max number of write image args 128
 Max number of read/write image args 128
 Max number of pipe args 16
 Max active pipe reservations 1
 Max pipe packet size 1024
 Local memory type Local
 Local memory size 65536 (64KiB)
 Max number of constant args 8
 Max constant buffer size 4294959104 (4GiB)
 Max size of kernel argument 1024
 Queue properties (on host) 
 Out-of-order execution Yes
 Profiling Yes
 Queue properties (on device) 
 Out-of-order execution Yes
 Profiling Yes
 Preferred size 131072 (128KiB)
 Max size 67108864 (64MiB)
 Max queues on device 1
 Max events on device 1024
 Prefer user sync for interop Yes
 Number of simultaneous interops (Intel) 1
 Simultaneous interops GL WGL D3D9 (KHR) D3D9 (INTEL) D3D9Ex (KHR) D3D9Ex (INTEL) DXVA (KHR) DXVA (INTEL) D3D10 D3D11
 Profiling timer resolution 83ns
 Execution capabilities 
 Run OpenCL kernels Yes
 Run native kernels No
 Sub-group independent forward progress Yes
 IL version SPIR-V_1.0 
 SPIR versions 1.2 
 printf() buffer size 4194304 (4MiB)
 Built-in kernels block_motion_estimate_intel;block_advanced_motion_estimate_check_intel;block_advanced_motion_estimate_bidirectional_check_intel;
 Motion Estimation accelerator version (Intel) 2
 Device-side AVC Motion Estimation version 1
 Supports texture sampler use Yes
 Supports preemption No
 Device Extensions cl_khr_3d_image_writes cl_khr_byte_addressable_store cl_khr_fp16 cl_khr_depth_images cl_khr_global_int32_base_atomics cl_khr_global_int32_extended_atomics cl_khr_icd cl_khr_image2d_from_buffer cl_khr_local_int32_base_atomics cl_khr_local_int32_extended_atomics cl_intel_subgroups cl_intel_required_subgroup_size cl_intel_subgroups_short cl_khr_spir cl_intel_accelerator cl_intel_media_block_io cl_intel_driver_diagnostics cl_intel_device_side_avc_motion_estimation cl_khr_priority_hints cl_khr_throttle_hints cl_khr_create_command_queue cl_khr_fp64 cl_khr_subgroups cl_khr_il_program cl_intel_spirv_device_side_avc_motion_estimation cl_intel_spirv_media_block_io cl_intel_spirv_subgroups cl_khr_spirv_no_integer_wrap_decoration cl_khr_mipmap_image cl_khr_mipmap_image_writes cl_intel_planar_yuv cl_intel_packed_yuv cl_intel_motion_estimation cl_intel_advanced_motion_estimation cl_khr_gl_sharing cl_khr_gl_depth_images cl_khr_gl_event cl_khr_gl_msaa_sharing cl_intel_dx9_media_sharing cl_khr_dx9_media_sharing cl_khr_d3d10_sharing cl_khr_d3d11_sharing cl_intel_d3d11_nv12_media_sharing cl_intel_simultaneous_sharing 

 Device Name Intel(R) Core(TM) i7-6700K CPU @ 4.00GHz
 Device Vendor Intel(R) Corporation
 Device Vendor ID 0x8086
 Device Version OpenCL 2.1 (Build 0)
 Driver Version 7.6.0.0228
 Device OpenCL C Version OpenCL C 2.0 
 Device Type CPU
 Device Profile FULL_PROFILE
 Device Available Yes
 Compiler Available Yes
 Linker Available Yes
 Max compute units 8
 Max clock frequency 4000MHz
 Device Partition (core)
 Max number of sub-devices 8
 Supported partition types by counts, equally, by names (Intel)
 Supported affinity domains (n/a)
 Max work item dimensions 3
 Max work item sizes 8192x8192x8192
 Max work group size 8192
 Preferred work group size multiple 128
 Max sub-groups per work group 1
 Preferred / native vector sizes 
 char 1 / 32 
 short 1 / 16 
 int 1 / 8 
 long 1 / 4 
 half 0 / 0 (n/a)
 float 1 / 8 
 double 1 / 4 (cl_khr_fp64)
 Half-precision Floating-point support (n/a)
 Single-precision Floating-point support (core)
 Denormals Yes
 Infinity and NANs Yes
 Round to nearest Yes
 Round to zero No
 Round to infinity No
 IEEE754-2008 fused multiply-add No
 Support is emulated in software No
 Correctly-rounded divide and sqrt operations No
 Double-precision Floating-point support (cl_khr_fp64)
 Denormals Yes
 Infinity and NANs Yes
 Round to nearest Yes
 Round to zero Yes
 Round to infinity Yes
 IEEE754-2008 fused multiply-add Yes
 Support is emulated in software No
 Address bits 64, Little-Endian
 Global memory size 34230546432 (31.88GiB)
 Error Correction support No
 Max memory allocation 8557636608 (7.97GiB)
 Unified memory for Host and Device Yes
 Shared Virtual Memory (SVM) capabilities (core)
 Coarse-grained buffer sharing Yes
 Fine-grained buffer sharing Yes
 Fine-grained system sharing No
 Atomics Yes
 Minimum alignment for any data type 128 bytes
 Alignment of base address 1024 bits (128 bytes)
 Preferred alignment for atomics 
 SVM 64 bytes
 Global 64 bytes
 Local 0 bytes
 Max size for global variable 65536 (64KiB)
 Preferred total size of global vars 65536 (64KiB)
 Global Memory cache type Read/Write
 Global Memory cache size 262144 (256KiB)
 Global Memory cache line size 64 bytes
 Image support Yes
 Max number of samplers per kernel 480
 Max size for 1D images from buffer 534852288 pixels
 Max 1D or 2D image array size 2048 images
 Base address alignment for 2D image buffers 64 bytes
 Pitch alignment for 2D image buffers 64 pixels
 Max 2D image size 16384x16384 pixels
 Max 3D image size 2048x2048x2048 pixels
 Max number of read image args 480
 Max number of write image args 480
 Max number of read/write image args 480
 Max number of pipe args 16
 Max active pipe reservations 32767
 Max pipe packet size 1024
 Local memory type Global
 Local memory size 32768 (32KiB)
 Max number of constant args 480
 Max constant buffer size 131072 (128KiB)
 Max size of kernel argument 3840 (3.75KiB)
 Queue properties (on host) 
 Out-of-order execution Yes
 Profiling Yes
 Local thread execution (Intel) Yes
 Queue properties (on device) 
 Out-of-order execution Yes
 Profiling Yes
 Preferred size 4294967295 (4GiB)
 Max size 4294967295 (4GiB)
 Max queues on device 4294967295
 Max events on device 4294967295
 Prefer user sync for interop No
 Profiling timer resolution 100ns
 Execution capabilities 
 Run OpenCL kernels Yes
 Run native kernels Yes
 Sub-group independent forward progress No
 IL version SPIR-V_1.0
 SPIR versions 1.2
 printf() buffer size 1048576 (1024KiB)
 Built-in kernels (n/a)
 Device 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 cl_khr_depth_images cl_khr_3d_image_writes cl_intel_exec_by_local_thread cl_khr_spir cl_khr_fp64 cl_khr_image2d_from_buffer cl_intel_vec_len_hint 

 Platform Name AMD Accelerated Parallel Processing
Number of devices 1
 Device Name Baffin
 Device Vendor Advanced Micro Devices, Inc.
 Device Vendor ID 0x1002
 Device Version OpenCL 2.0 AMD-APP (2841.5)
 Driver Version 2841.5
 Device OpenCL C Version OpenCL C 2.0 
 Device Type GPU
 Device Board Name (AMD) Radeon(TM) RX 460 Graphics
 Device Topology (AMD) PCI-E, 01:00.0
 Device Profile FULL_PROFILE
 Device Available Yes
 Compiler Available Yes
 Linker Available Yes
 Max compute units 14
 SIMD per compute unit (AMD) 4
 SIMD width (AMD) 16
 SIMD instruction width (AMD) 1
 Max clock frequency 1212MHz
 Graphics IP (AMD) 8.0
 Device Partition (core)
 Max number of sub-devices 14
 Supported partition types None
 Supported affinity domains (n/a)
 Max work item dimensions 3
 Max work item sizes 1024x1024x1024
 Max work group size 256
 Preferred work group size (AMD) 256
 Max work group size (AMD) 1024
 Preferred work group size multiple 64
 Wavefront width (AMD) 64
 Preferred / native vector sizes 
 char 4 / 4 
 short 2 / 2 
 int 1 / 1 
 long 1 / 1 
 half 1 / 1 (cl_khr_fp16)
 float 1 / 1 
 double 1 / 1 (cl_khr_fp64)
 Half-precision Floating-point support (cl_khr_fp16)
 Denormals No
 Infinity and NANs No
 Round to nearest No
 Round to zero No
 Round to infinity No
 IEEE754-2008 fused multiply-add No
 Support is emulated in software No
 Single-precision Floating-point support (core)
 Denormals No
 Infinity and NANs Yes
 Round to nearest Yes
 Round to zero Yes
 Round to infinity Yes
 IEEE754-2008 fused multiply-add Yes
 Support is emulated in software No
 Correctly-rounded divide and sqrt operations Yes
 Double-precision Floating-point support (cl_khr_fp64)
 Denormals Yes
 Infinity and NANs Yes
 Round to nearest Yes
 Round to zero Yes
 Round to infinity Yes
 IEEE754-2008 fused multiply-add Yes
 Support is emulated in software No
 Address bits 64, Little-Endian
 Global memory size 2147483648 (2GiB)
 Global free memory (AMD) 2046441 (1.952GiB)
 Global memory channels (AMD) 4
 Global memory banks per channel (AMD) 16
 Global memory bank width (AMD) 256 bytes
 Error Correction support No
 Max memory allocation 1597190963 (1.487GiB)
 Unified memory for Host and Device No
 Shared Virtual Memory (SVM) capabilities (core)
 Coarse-grained buffer sharing Yes
 Fine-grained buffer sharing Yes
 Fine-grained system sharing No
 Atomics No
 Minimum alignment for any data type 128 bytes
 Alignment of base address 2048 bits (256 bytes)
 Preferred alignment for atomics 
 SVM 0 bytes
 Global 0 bytes
 Local 0 bytes
 Max size for global variable 1437471744 (1.339GiB)
 Preferred total size of global vars 2147483648 (2GiB)
 Global Memory cache type Read/Write
 Global Memory cache size 16384 (16KiB)
 Global Memory cache line size 64 bytes
 Image support Yes
 Max number of samplers per kernel 16
 Max size for 1D images from buffer 134217728 pixels
 Max 1D or 2D image array size 2048 images
 Base address alignment for 2D image buffers 256 bytes
 Pitch alignment for 2D image buffers 256 pixels
 Max 2D image size 16384x16384 pixels
 Max 3D image size 2048x2048x2048 pixels
 Max number of read image args 128
 Max number of write image args 64
 Max number of read/write image args 64
 Max number of pipe args 16
 Max active pipe reservations 16
 Max pipe packet size 1597190963 (1.487GiB)
 Local memory type Local
 Local memory size 32768 (32KiB)
 Local memory syze per CU (AMD) 65536 (64KiB)
 Local memory banks (AMD) 32
 Max number of constant args 8
 Max constant buffer size 1597190963 (1.487GiB)
 Preferred constant buffer size (AMD) 16384 (16KiB)
 Max size of kernel argument 1024
 Queue properties (on host) 
 Out-of-order execution No
 Profiling Yes
 Queue properties (on device) 
 Out-of-order execution Yes
 Profiling Yes
 Preferred size 262144 (256KiB)
 Max size 8388608 (8MiB)
 Max queues on device 1
 Max events on device 1024
 Prefer user sync for interop Yes
 Profiling timer resolution 1ns
 Profiling timer offset since Epoch (AMD) 1558950738135944700ns (Mon May 27 10:52:18 2019)
 Execution capabilities 
 Run OpenCL kernels Yes
 Run native kernels No
 Thread trace supported (AMD) Yes
 Number of async queues (AMD) 2
 Max real-time compute queues (AMD) 2
 Max real-time compute units (AMD) 4
 SPIR versions 1.2
 printf() buffer size 4194304 (4MiB)
 Built-in kernels (n/a)
 Device 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_3d_image_writes cl_khr_byte_addressable_store cl_khr_fp16 cl_khr_gl_sharing cl_khr_gl_depth_images cl_amd_device_attribute_query cl_amd_vec3 cl_amd_printf cl_amd_media_ops cl_amd_media_ops2 cl_amd_popcnt cl_khr_d3d10_sharing cl_khr_d3d11_sharing cl_khr_dx9_media_sharing cl_khr_image2d_from_buffer cl_khr_spir cl_khr_subgroups cl_khr_gl_event cl_khr_depth_images cl_khr_mipmap_image cl_khr_mipmap_image_writes cl_amd_liquid_flash cl_amd_planar_yuv


NULL platform behavior
 clGetPlatformInfo(NULL, CL_PLATFORM_NAME, ...) No platform
 clGetDeviceIDs(NULL, CL_DEVICE_TYPE_ALL, ...) No platform
 clCreateContext(NULL, ...) [default] No platform
 clCreateContext(NULL, ...) [other] Success [INTEL]
 clCreateContextFromType(NULL, CL_DEVICE_TYPE_DEFAULT) Success (1)
 Platform Name Intel(R) OpenCL
 Device Name Intel(R) HD Graphics 530
 clCreateContextFromType(NULL, CL_DEVICE_TYPE_CPU) Success (1)
 Platform Name Intel(R) OpenCL
 Device Name Intel(R) Core(TM) i7-6700K CPU @ 4.00GHz
 clCreateContextFromType(NULL, CL_DEVICE_TYPE_GPU) Success (1)
 Platform Name Intel(R) OpenCL
 Device Name Intel(R) HD Graphics 530
 clCreateContextFromType(NULL, CL_DEVICE_TYPE_ACCELERATOR) No devices found in platform
 clCreateContextFromType(NULL, CL_DEVICE_TYPE_CUSTOM) Invalid device type for platform
 clCreateContextFromType(NULL, CL_DEVICE_TYPE_ALL) Success (2)
 Platform Name Intel(R) OpenCL
 Device Name Intel(R) Core(TM) i7-6700K CPU @ 4.00GHz
 Device Name Intel(R) HD Graphics 530

As you can see, the upstream ICD loader can list two platforms.

[dipak]

Thank you for sharing the above clinfo outputs. I'll report it to the concerned team.

By the way, may I assume that in both the cases the overall environment (i.e. ICD registry keys, installed drivers etc.) was same except the ICD loader (i.e. OpenCL.dll)?

Thanks.

[tluisrs]

That's exactly the case. The only difference is the ICD Loader.

[dipak]

Thank you for the confirmation. I've reported the issue to the concerned team. Once I've any update about it, I'll get back to you.

Thanks.

[dipak]

Update:

The concerned team has identified the root cause of the problem and they are making changes to fix this issue. 

Thanks for bringing this issue to our attention.

Thanks.

[tluisrs]

Excellent!