anyone ever use integrated intel openCL device ?

[ker2x]

Hey

Anyone ever managed to use the integrated graphic card of an intel CPU as an openCL device ?
It's supposed to works but my cpu (i7 4770K) was never recognized as an openCL device.
I didn't try hard however, maybe a bios thingy ? an sdk ? a runtime ?

thx <3

[phtolo]

I have tested it and it worked for me without any configuration (windows 10, Intel i5-6440).

Are you using a 64-bit OS ? It seems OpenCL is a 64-bit only thing.

Theres a list of supported devices/OSes here:
https://www.khronos.org/conformance/adopters/conformant-products#opencl

[quaz0r]

i have a 4770k also.  on linux you need to use beignet, an open-source opencl implementation for intel.  if you have multiple opencl devices you also want to go ahead and use ocl-icd, which is an opencl middleware sort of library which enables programs to access multiple different opencl devices through the single libOpenCL.so it provides.

i have no idea about windows though.  i was actually wondering this myself recently, if windows has anything akin to ocl-icd ?

[ker2x]

I'm on windows 10 64 bits.
I just tested with luxmark and only the GPUs are detected as openCL device

[ker2x]

installed this https://software.intel.com/en-us/articles/opencl-drivers#core_xeon
it works now but i'm not really sure if it use the embedded graphic card. (or if it's possible to use it)

[ker2x]

Code:

2016-10-06 18:57:59 - [LuxRays] [12.297] Device 1 type: OPENCL_GPU
2016-10-06 18:57:59 - [LuxRays] [12.297] Device 1 compute units: 13
2016-10-06 18:57:59 - [LuxRays] [12.297] Device 1 preferred float vector width: 1
2016-10-06 18:57:59 - [LuxRays] [12.297] Device 1 max allocable memory: 4096MBytes
2016-10-06 18:57:59 - [LuxRays] [12.297] Device 1 max allocable memory block size: 1024MBytes
2016-10-06 18:57:59 - [LuxRays] [12.297] Device 2 name: GeForce GTX 750
2016-10-06 18:57:59 - [LuxRays] [12.297] Device 2 type: OPENCL_GPU
2016-10-06 18:57:59 - [LuxRays] [12.297] Device 2 compute units: 4
2016-10-06 18:57:59 - [LuxRays] [12.297] Device 2 preferred float vector width: 1
2016-10-06 18:57:59 - [LuxRays] [12.297] Device 2 max allocable memory: 2048MBytes
2016-10-06 18:57:59 - [LuxRays] [12.297] Device 2 max allocable memory block size: 512MBytes
2016-10-06 18:57:59 - [LuxRays] [12.297] Device 3 name: Intel(R) Core(TM) i7-4770K CPU @ 3.50GHz
2016-10-06 18:57:59 - [LuxRays] [12.297] Device 3 type: OPENCL_CPU
2016-10-06 18:57:59 - [LuxRays] [12.297] Device 3 compute units: 8
2016-10-06 18:57:59 - [LuxRays] [12.297] Device 3 preferred float vector width: 8
2016-10-06 18:57:59 - [LuxRays] [12.297] Device 3 max allocable memory: 32702MBytes
2016-10-06 18:57:59 - [LuxRays] [12.297] Device 3 max allocable memory block size: 8175MBytes

[3dickulus]

the bios (depending on motherboard make/model) may allow enabling both onboard and gfx card devices at the same time ( mine does ) but usually defaults to the gfx card when one is available, it may also depend on version compatibility, as in, it only works if both devices can use the same driver and OpenCL version.

[quaz0r]

the bios (depending on motherboard make/model) may allow enabling both onboard and gfx card devices at the same time ( mine does  ) but usually defaults to the gfx card when one is available

do bioses actually default to disabling compute devices when more than one exists?  that would seem a most ill-conceived behavior  

it may also depend on version compatibility, as in, it only works if both devices can use the same driver and OpenCL version.

and indeed, it only works if the multiple devices can use the same driver, which is why something like ocl-icd exists.  it exists as your system's libOpenCL.so (the library dll or whatever in windows terms), and itself interfaces the different actual libOpenCL.so's associated with your different compute devices, providing programs with a clean and straightforward way of accessing multiple differing opencl devices.  and again i would be interested to hear if anyone knows if there is such a thing in windows land ?

[3dickulus]

it doesn't "see" 2 devices unless I explicitly enable both in the bios and the few times I've played with the idea I don't get them both crunching at the same time due to version issues... too old? maybe I should update my MoBo. CPUocl + GPUocl works but the other gfx processor is left idle.

[mclarekin]

My two cents, if I understand this post :-

From memory when using Mandebulber 1.21 OpenCL version I get the choice of running openCL on three devices

- intel cpu
- embedded Intel graphics
- graphics card

[ker2x]

My two cents, if I understand this post :-

From memory when using Mandebulber 1.21 OpenCL version I get the choice of running openCL on three devices

- intel cpu
- embedded Intel graphics
- graphics card

i'll give it a try

[woronoi]