OpenCL

[mikewolf_gkd]

my HP elite g3 notebook with newest drivers, seems it is carrizo displaycard.

I run opencl 2.0 sampels in  amd app sdk samples.

it gave me inforamtion:

carrizo Device is xxxxx

Unsupported device! required CL_DEVICE_OPENCL_C+VERSION 2.0 or higher.

I think carrizo is same arch with fiji, no reason not support opencl2.0, why know reasons?

thanks,

[dipak]

Please make sure that you've installed the latest driver from here: Download Drivers . After driver installation, please run "clinfo" command and check  "Device OpenCL C version" parameter in clinfo output. If the value is "OpenCL C 2.0", then OpenCL 2.0 samples will work, otherwise not.

[mikewolf_gkd]

hi, dipak

thanks quick reply.

actually, my driver is newest version 17.12.1

from clinfo, seems gpu support opencl2.0, but from app sdk opencl2.0 sample(simplepipe),

I found below lines, its return deviceVersion is 0x013615b8 "OpenCL 1.2 AMD-APP (2527.7)", very strange, seems driver some issues.

CLUitl.hpp:2356

            status = clGetDeviceInfo(

                         deviceId,

                         CL_DEVICE_VERSION,

                         sizeof(char) * tempSize,

                         deviceVersion,

                         NULL);

Number of platforms:				1
Platform Profile:				FULL_PROFILE
Platform Version:				OpenCL 2.1 AMD-APP (2527.7)
Platform Name:				AMD Accelerated Parallel Processing
Platform Vendor:				Advanced Micro Devices, Inc.
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

detail clinfo

Platform Name:				AMD Accelerated Parallel Processing
Number of devices:				2
Device Type:					CL_DEVICE_TYPE_GPU
Vendor ID:					1002h
Board name:					AMD Radeon R7 Graphics
Device Topology:				PCI[ B#0, D#0, F#1 ]
Max compute units:				8
Max work items dimensions:			3
Max work items[0]:				1024
Max work items[1]:				1024
Max work items[2]:				1024
Max work group size:				256
Preferred vector width char:			4
Preferred vector width short:			2
Preferred vector width int:			1
Preferred vector width long:			1
Preferred vector width float:			1
Preferred vector width double:		1
Native vector width char:			4
Native vector width short:			2
Native vector width int:			1
Native vector width long:			1
Native vector width float:			1
Native vector width double:			1
Max clock frequency:				720Mhz
Address bits:					64
Max memory allocation:			1368352358
Image support:				Yes
Max number of images read arguments:		128
Max number of images write arguments:		64
Max image 2D width:				16384
Max image 2D height:				16384
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:					Read/Write
Cache line size:				64
Cache size:					16384
Global memory size:				2146697216
Constant buffer size:				1368352358
Max number of constant args:			8
Local memory type:				Scratchpad
Local memory size:				32768
Max pipe arguments:				16
Max pipe active reservations:			16
Max pipe packet size:				1368352358
Max global variable size:			1231516928
Max global variable preferred total size:	2146697216
Max read/write image args:			64
Max on device events:				1024
Queue on device max size:			8388608
Max on device queues:				1
Queue on device preferred size:		262144
SVM capabilities:
Coarse grain buffer:			Yes
Fine grain buffer:				Yes
Fine grain system:				Yes
Atomics:					Yes
Preferred platform atomic alignment:		0
Preferred global atomic alignment:		0
Preferred local atomic alignment:		0
Kernel Preferred work group size multiple:	64
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:			No
Queue on Host properties:
Out-of-Order:				No
Profiling :					Yes
Queue on Device properties:
Out-of-Order:				Yes
Profiling :					Yes
Platform ID:					00007FFAFC334AB0
Name:						Carrizo
Vendor:					Advanced Micro Devices, Inc.
Device OpenCL C version:			OpenCL C 2.0
Driver version:				2527.7
Profile:					FULL_PROFILE
Version:					OpenCL 2.0 AMD-APP (2527.7)
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

Device Type:					CL_DEVICE_TYPE_CPU
Vendor ID:					1002h
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:			8
Preferred vector width double:		4
Native vector width char:			16
Native vector width short:			8
Native vector width int:			4
Native vector width long:			2
Native vector width float:			8
Native vector width double:			4
Max clock frequency:				2096Mhz
Address bits:					64
Max memory allocation:			2147483648
Image support:				Yes
Max number of images read arguments:		128
Max number of images write arguments:		64
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:				7963320320
Constant buffer size:				65536
Max number of constant args:			8
Local memory type:				Global
Local memory size:				32768
Max pipe arguments:				16
Max pipe active reservations:			16
Max pipe packet size:				2147483648
Max global variable size:			1879048192
Max global variable preferred total size:	1879048192
Max read/write image args:			64
Max on device events:				0
Queue on device max size:			0
Max on device queues:				0
Queue on device preferred size:		0
SVM capabilities:
Coarse grain buffer:			No
Fine grain buffer:				No
Fine grain system:				No
Atomics:					No
Preferred platform atomic alignment:		0
Preferred global atomic alignment:		0
Preferred local atomic alignment:		0
Kernel Preferred work group size multiple:	1
Error correction support:			0
Unified memory for Host and Device:		1
Profiling timer resolution:			488
Device endianess:				Little
Available:					Yes
Compiler available:				Yes
Execution capabilities:
Execute OpenCL kernels:			Yes
Execute native function:			Yes
Queue on Host properties:
Out-of-Order:				No
Profiling :					Yes
Queue on Device properties:
Out-of-Order:				No
Profiling :					No
Platform ID:					00007FFAFC334AB0
Name:						AMD PRO A12-8800B R7, 12 Compute Cores 4C+8G
Vendor:					AuthenticAMD
Device OpenCL C version:			OpenCL C 1.2
Driver version:				2527.7 (sse2,avx,fma4)
Profile:					FULL_PROFILE
Version:					OpenCL 1.2 AMD-APP (2527.7)
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_gl_sharing cl_ext_device_fission 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_spir cl_khr_gl_event

[dipak · Accepted solution]

As per the above clinfo output, OpenCL 2.0 samples should work on your system. I suspect you are building the sample as 32bit application, hence failing to detect the gpu as OpenCL 2.0 device. If that's the reason, please build it as 64bit application because OpenCL 2.0 is supported on 64-bit OS only.

[mikewolf_gkd]

yes, I build sample with win32, switch to x64, it works

thanks, again.

[mirh]

Protip: GPU_FORCE_OCL20_32BIT=1 (assuming it's not too much experimental) should also work.