Ubuntu install results in CL_DEVICE_NOT_AVAILABLE

Seth_P_ · ‎10-24-2014

I've installed the Intel SDK on my Ubuntu VM, and the install seems to have worked fine. I can run the program here:

https://gist.github.com/rmcgibbo/6314452/download#

Which results in this info. As near as I can tell, it's all right. (Dunno if preferred vector widths are supposed to be 1, though.)

$ ./clDeviceQuery

clDeviceQuery Starting...

1 OpenCL Platforms found

CL_PLATFORM_NAME: Intel(R) OpenCL

CL_PLATFORM_VERSION: OpenCL 1.2 LINUX

OpenCL Device Info:

1 devices found supporting OpenCL on: Intel(R) OpenCL

----------------------------------

Device Intel(R) Core(TM) i7-4850HQ CPU @ 2.30GHz

---------------------------------

CL_DEVICE_NAME: Intel(R) Core(TM) i7-4850HQ CPU @ 2.30GHz

CL_DEVICE_VENDOR: Intel(R) Corporation

CL_DRIVER_VERSION: 1.2.0.8

CL_DEVICE_TYPE: CL_DEVICE_TYPE_CPU

CL_DEVICE_MAX_COMPUTE_UNITS: 2

CL_DEVICE_MAX_WORK_ITEM_DIMENSIONS: 3

CL_DEVICE_MAX_WORK_ITEM_SIZES: 8192 / 8192 / 8192

CL_DEVICE_MAX_WORK_GROUP_SIZE: 8192

CL_DEVICE_MAX_CLOCK_FREQUENCY: 2300 MHz

CL_DEVICE_ADDRESS_BITS: 64

CL_DEVICE_MAX_MEM_ALLOC_SIZE: 626 MByte

CL_DEVICE_GLOBAL_MEM_SIZE: 2507 MByte

CL_DEVICE_ERROR_CORRECTION_SUPPORT: no

CL_DEVICE_LOCAL_MEM_TYPE: global

CL_DEVICE_LOCAL_MEM_SIZE: 32 KByte

CL_DEVICE_MAX_CONSTANT_BUFFER_SIZE: 128 KByte

CL_DEVICE_QUEUE_PROPERTIES: CL_QUEUE_OUT_OF_ORDER_EXEC_MODE_ENABLE

CL_DEVICE_QUEUE_PROPERTIES: CL_QUEUE_PROFILING_ENABLE

CL_DEVICE_IMAGE_SUPPORT: 1

CL_DEVICE_MAX_READ_IMAGE_ARGS: 480

CL_DEVICE_MAX_WRITE_IMAGE_ARGS: 480

CL_DEVICE_IMAGE <dim> 2D_MAX_WIDTH 16384

2D_MAX_HEIGHT 16384

3D_MAX_WIDTH 2048

3D_MAX_HEIGHT 2048

3D_MAX_DEPTH 2048

CL_DEVICE_PREFERRED_VECTOR_WIDTH_<t> CHAR 1, SHORT 1, INT 1, FLOAT 1, DOUBLE 1

clDeviceQuery, Platform Name = Intel(R) OpenCL, Platform Version = OpenCL 1.2 LINUX, NumDevs = 1, Device = Intel(R) Core(TM) i7-4850HQ CPU @ 2.30GHz

System Info:

Local Time/Date = 19:13:19, 10/24/2014

CPU Name: Intel(R) Core(TM) i7-4850HQ CPU @ 2.30GHz

# of CPU processors: 2

Linux version 3.2.0-23-generic (buildd@crested) (gcc version 4.6.3 (Ubuntu/Linaro 4.6.3-1ubuntu4) ) #36-Ubuntu SMP Tue Apr 10 20:39:51 UTC 2012

TEST PASSED

However, I can't get further than CL_DEVICE_NOT_AVAILABLE when I call clCreateContext(). If I run the test program on this page:

http://wiki.tiker.net/OpenCLHowTo

The output looks like this:

$ ./cl-demo 1000000 10

Choose platform:

[0] Intel(R) Corporation

Enter choice:

Choose device:

[0] Intel(R) Core(TM) i7-4850HQ CPU @ 2.30GHz

Enter choice:

*** 'clCreateContext' in 'cl-helper.c' on line 342 failed with error 'device not available'.

Aborted

Any ideas on what I'm doing wrong? As near as I can tell, the processor *should* be supported.

Yuri_K_Intel · ‎10-27-2014

Hi Seth, You mentioned that you are using a Virtual Machine. Please, have a look at the similar threads: https://software.intel.com/en-us/forums/topic/506830 https://software.intel.com/en-us/forums/topic/530471 To summarize, SSE4.2 should be available inside guest OS in order for Intel OpenCL CPU runtime to work. If you are using VirtualBox here is the note from corresponding ticket (https://www.virtualbox.org/ticket/8651): "VBox 4.3.8 RC1 provides experimental support for passing through SSE 4.1/4.2. Please have a look at the user manual -- it is required to enable this support manually per-VM." Thanks, Yuri