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python - Can I use ati opencl with hybrid video card (intel/ati)

问题描述:

I'm trying to setup a system to learn opencl on my laptop running Arch Linux. Laptop has hybrid video card (intel HD4000 and ati 8790). I installed AMD-APP-SDK and I'm able to run the sample pyopencl code:

import pyopencl as cl

cl.get_platforms()[0].get_devices()

however this only shows the CPU device:

[<pyopencl.Device 'Intel(R) Core(TM) i7-4800MQ CPU @ 2.70GHz' on 'AMD Accelerated Parallel Processing' at 0xf55130>]

the output of clinfo is:

Number of platforms: 1

Platform Profile: FULL_PROFILE

Platform Version: OpenCL 2.0 AMD-APP (1642.5)

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

Vendor ID: 1002h

Board name:

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: 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: 606Mhz

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: 8278106112

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: 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: 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 on Host properties:

Out-of-Order: No

Profiling : Yes

Queue on Device properties:

Out-of-Order: No

Profiling : No

Platform ID: 0x7f22c575efd0

Name: Intel(R) Core(TM) i7-4800MQ CPU @ 2.70GHz

Vendor: GenuineIntel

Device OpenCL C version: OpenCL C 1.2

Driver version: 1642.5 (sse2,avx)

Profile: FULL_PROFILE

Version: OpenCL 1.2 AMD-APP (1642.5)

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_spir cl_khr_gl_event

I'm currently using intel as my video driver. I often switch between different monitor setups and intel supports xrandr very well so I'd like to keep using it but enable ati driver just for opencl computation. Is this possible at all? If it is, what should I do to accomplish that?

网友答案:

To leverage the Intel HD4000 you'll need the Intel OpenCL driver installed. Only the AMD platform is showing up in your clinfo dump.

网友答案:

Since AMD APP SDK 2.6 you need Catalyst driver to develop & run OpenCL-enabled software.

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