[SYCL] POCL fails with OpenCL API returns: -34 (CL_INVALID_CONTEXT) -34

[jeffhammond]

Is POCL supported? Do you know why Level Zero doesn't support the CPU device on an ARM platform? What is the recommended approach to debugging this?

ubuntu@ubuntu:~/PRK/Cxx11$ SYCL_BE=PI_OPENCL ./nstream-sycl-usm 10 1000000
Parallel Research Kernels version 2020
C++11/SYCL STREAM triad: A = B + scalar * C
Number of iterations = 10
Vector length        = 1000000
Offset               = 0
SYCL Device:   SYCL host device
SYCL Platform: SYCL host platform
Solution validates
32B Rate (MB/s): 2187.72 Avg time (s): 0.00731354
Solution validates
64B Rate (MB/s): 2498.54 Avg time (s): 0.0128075
SYCL Device:   pthread-cortex-a72
SYCL Platform: Portable Computing Language
OpenCL API failed. OpenCL API returns: -34 (CL_INVALID_CONTEXT) -34 (CL_INVALID_CONTEXT)
OpenCL API failed. OpenCL API returns: -34 (CL_INVALID_CONTEXT) -34 (CL_INVALID_CONTEXT) -34 (CL_INVALID_CONTEXT)
No device of requested type available. -1 (CL_DEVICE_NOT_FOUND)

ubuntu@ubuntu:~/PRK/Cxx11$ SYCL_BE=PI_LEVEL0 ./nstream-sycl-usm 10 1000000
Parallel Research Kernels version 2020
C++11/SYCL STREAM triad: A = B + scalar * C
Number of iterations = 10
Vector length        = 1000000
Offset               = 0
SYCL Device:   SYCL host device
SYCL Platform: SYCL host platform
Solution validates
32B Rate (MB/s): 1962.54 Avg time (s): 0.0081527
Solution validates
64B Rate (MB/s): 2397.35 Avg time (s): 0.0133481
No device of requested type available. -1 (CL_DEVICE_NOT_FOUND)
No device of requested type available. -1 (CL_DEVICE_NOT_FOUND)

[bader]

Is POCL supported?

AFAIK, no.

Do you know why Level Zero doesn't support the CPU device on an ARM platform?

The only implementation I'm aware of is for Intel GPU device - https://github.com/intel/compute-runtime.

What is the recommended approach to debugging this?

Debug version of the toolchain can be debugged with GDB.
SYCL_PI_TRACE env. variable might be helpful to identify OpenCL API returning non-successful error code.

[jeffhammond]

It would seem that piProgramCreate is failing.

ubuntu@ubuntu:~/PRK/Cxx11$ SYCL_PI_TRACE=99 ./nstream-sycl 10 1000000
Parallel Research Kernels version 2020
C++11/SYCL STREAM triad: A = B + scalar * C
Number of iterations = 10
Vector length        = 1000000
Offset               = 0
SYCL_PI_TRACE[basic]: Plugin found and successfully loaded: libpi_opencl.so
SYCL_PI_TRACE[basic]: Plugin found and successfully loaded: libpi_level_zero.so
---> piPlatformsGet(
       <unknown> : 0
       <unknown> : 0
       <unknown> : 0xffffe1fc831c
) --->        pi_result : PI_SUCCESS
---> piPlatformsGet(
       <unknown> : 2
       <unknown> : 0x9ef8050
       <unknown> : 0
) --->        pi_result : PI_SUCCESS
---> piDevicesGet(
       pi_platform : 0xffff96c84008
       <unknown> : 4294967295
       <unknown> : 0
       <unknown> : 0
       <unknown> : 0xffffe1fc818c
) --->        pi_result : PI_SUCCESS
---> piDevicesGet(
       pi_platform : 0xffff96c84008
       <unknown> : 4294967295
       <unknown> : 1
       <unknown> : 0x9f04e40
       <unknown> : 0
) --->        pi_result : PI_SUCCESS
---> piDeviceGetInfo(
       <unknown> : 0x9f073f0
       <unknown> : 4096
       <unknown> : 8
       <unknown> : 0x9ee61c8
       <unknown> : 0
) --->        pi_result : PI_SUCCESS
---> piDeviceGetInfo(
       <unknown> : 0x9f073f0
       <unknown> : 4162
       <unknown> : 8
       <unknown> : 0xffffe1fc8048
       <unknown> : 0
) --->        pi_result : PI_SUCCESS
---> piDeviceRetain(
       <unknown> : 0x9f073f0
) --->        pi_result : PI_SUCCESS
---> piPlatformGetInfo(
       pi_platform : 0xffff96c84008
       <unknown> : 2306
       <unknown> : 0
       <unknown> : 0
       <unknown> : 0xffffe1fc8180
) --->        pi_result : PI_SUCCESS
---> piPlatformGetInfo(
       pi_platform : 0xffff96c84008
       <unknown> : 2306
       <unknown> : 28
       <unknown> : ���	
       <unknown> : 0
) --->        pi_result : PI_SUCCESS
---> piDeviceRelease(
       <unknown> : 0x9f073f0
) --->        pi_result : PI_SUCCESS
---> piDevicesGet(
       pi_platform : 0xffff91a3de18
       <unknown> : 4294967295
       <unknown> : 0
       <unknown> : 0
       <unknown> : 0xffffe1fc818c
) --->        pi_result : PI_SUCCESS
---> piPlatformsGet(
       <unknown> : 0
       <unknown> : 0
       <unknown> : 0xffffe1fc831c
) --->        pi_result : PI_SUCCESS
---> piDevicesGet(
       pi_platform : 0xffff96c84008
       <unknown> : 4294967295
       <unknown> : 0
       <unknown> : 0
       <unknown> : 0xffffe1fc832c
) --->        pi_result : PI_SUCCESS
---> piDevicesGet(
       pi_platform : 0xffff96c84008
       <unknown> : 4294967295
       <unknown> : 1
       <unknown> : 0x9f044d0
       <unknown> : 0
) --->        pi_result : PI_SUCCESS
---> piDeviceGetInfo(
       <unknown> : 0x9f073f0
       <unknown> : 4096
       <unknown> : 8
       <unknown> : 0x9e9a458
       <unknown> : 0
) --->        pi_result : PI_SUCCESS
---> piDeviceGetInfo(
       <unknown> : 0x9f073f0
       <unknown> : 4162
       <unknown> : 8
       <unknown> : 0xffffe1fc81e8
       <unknown> : 0
) --->        pi_result : PI_SUCCESS
---> piDeviceRetain(
       <unknown> : 0x9f073f0
) --->        pi_result : PI_SUCCESS
SYCL_PI_TRACE[all]: Selected device ->
SYCL_PI_TRACE[all]:   platform: SYCL host platform
SYCL_PI_TRACE[all]:   device: SYCL host device
---> piDeviceRelease(
       <unknown> : 0x9f073f0
) --->        pi_result : PI_SUCCESS
SYCL Device:   SYCL host device
SYCL Platform: SYCL host platform
Solution validates
32B Rate (MB/s): 2206.5 Avg time (s): 0.00725131
Solution validates
64B Rate (MB/s): 2173.28 Avg time (s): 0.0147243
---> piPlatformsGet(
       <unknown> : 0
       <unknown> : 0
       <unknown> : 0xffffe1fc831c
) --->        pi_result : PI_SUCCESS
---> piPlatformsGet(
       <unknown> : 2
       <unknown> : 0x9ee8d10
       <unknown> : 0
) --->        pi_result : PI_SUCCESS
---> piDevicesGet(
       pi_platform : 0xffff96c84008
       <unknown> : 4294967295
       <unknown> : 0
       <unknown> : 0
       <unknown> : 0xffffe1fc818c
) --->        pi_result : PI_SUCCESS
---> piDevicesGet(
       pi_platform : 0xffff96c84008
       <unknown> : 4294967295
       <unknown> : 1
       <unknown> : 0x9ee70f0
       <unknown> : 0
) --->        pi_result : PI_SUCCESS
---> piDeviceGetInfo(
       <unknown> : 0x9f073f0
       <unknown> : 4096
       <unknown> : 8
       <unknown> : 0x9f08788
       <unknown> : 0
) --->        pi_result : PI_SUCCESS
---> piDeviceGetInfo(
       <unknown> : 0x9f073f0
       <unknown> : 4162
       <unknown> : 8
       <unknown> : 0xffffe1fc8048
       <unknown> : 0
) --->        pi_result : PI_SUCCESS
---> piDeviceRetain(
       <unknown> : 0x9f073f0
) --->        pi_result : PI_SUCCESS
---> piPlatformGetInfo(
       pi_platform : 0xffff96c84008
       <unknown> : 2306
       <unknown> : 0
       <unknown> : 0
       <unknown> : 0xffffe1fc8180
) --->        pi_result : PI_SUCCESS
---> piPlatformGetInfo(
       pi_platform : 0xffff96c84008
       <unknown> : 2306
       <unknown> : 28
       <unknown> : 0��	
       <unknown> : 0
) --->        pi_result : PI_SUCCESS
---> piDeviceRelease(
       <unknown> : 0x9f073f0
) --->        pi_result : PI_SUCCESS
---> piDevicesGet(
       pi_platform : 0xffff91a3de18
       <unknown> : 4294967295
       <unknown> : 0
       <unknown> : 0
       <unknown> : 0xffffe1fc818c
) --->        pi_result : PI_SUCCESS
---> piPlatformsGet(
       <unknown> : 0
       <unknown> : 0
       <unknown> : 0xffffe1fc831c
) --->        pi_result : PI_SUCCESS
---> piDevicesGet(
       pi_platform : 0xffff96c84008
       <unknown> : 4294967295
       <unknown> : 0
       <unknown> : 0
       <unknown> : 0xffffe1fc832c
) --->        pi_result : PI_SUCCESS
---> piDevicesGet(
       pi_platform : 0xffff96c84008
       <unknown> : 4294967295
       <unknown> : 1
       <unknown> : 0x9eea410
       <unknown> : 0
) --->        pi_result : PI_SUCCESS
---> piDeviceGetInfo(
       <unknown> : 0x9f073f0
       <unknown> : 4096
       <unknown> : 8
       <unknown> : 0x9e9a458
       <unknown> : 0
) --->        pi_result : PI_SUCCESS
---> piDeviceGetInfo(
       <unknown> : 0x9f073f0
       <unknown> : 4162
       <unknown> : 8
       <unknown> : 0xffffe1fc81e8
       <unknown> : 0
) --->        pi_result : PI_SUCCESS
---> piDeviceRetain(
       <unknown> : 0x9f073f0
) --->        pi_result : PI_SUCCESS
---> piDeviceGetInfo(
       <unknown> : 0x9f073f0
       <unknown> : 4145
       <unknown> : 8
       <unknown> : 0xffffe1fc84b0
       <unknown> : 0
) --->        pi_result : PI_SUCCESS
---> piPlatformGetInfo(
       pi_platform : 0xffff96c84008
       <unknown> : 2306
       <unknown> : 0
       <unknown> : 0
       <unknown> : 0xffffe1fc8480
) --->        pi_result : PI_SUCCESS
---> piPlatformGetInfo(
       pi_platform : 0xffff96c84008
       <unknown> : 2306
       <unknown> : 28
       <unknown> : @L�	
       <unknown> : 0
) --->        pi_result : PI_SUCCESS
---> piDeviceGetInfo(
       <unknown> : 0x9f073f0
       <unknown> : 4139
       <unknown> : 0
       <unknown> : 0
       <unknown> : 0xffffe1fc84e0
) --->        pi_result : PI_SUCCESS
---> piDeviceGetInfo(
       <unknown> : 0x9f073f0
       <unknown> : 4139
       <unknown> : 19
       <unknown> : ��	
       <unknown> : 0
) --->        pi_result : PI_SUCCESS
SYCL_PI_TRACE[all]: Selected device ->
SYCL_PI_TRACE[all]:   platform: Portable Computing Language
SYCL_PI_TRACE[all]:   device: pthread-cortex-a72
---> piContextCreate(
       <unknown> : 0
       <unknown> : 1
       <unknown> : 0x9ee6b90
       <unknown> : 0
       <unknown> : 0
       <unknown> : 0x9ef87c8
) --->        pi_result : PI_SUCCESS
---> piQueueCreate(
       <unknown> : 0x9ef8680
       <unknown> : 0x9f073f0
       <unknown> : 1
       <unknown> : 0xffffe1fc8470
) --->        pi_result : PI_SUCCESS
SYCL Device:   ---> piDeviceGetInfo(
       <unknown> : 0x9f073f0
       <unknown> : 4139
       <unknown> : 0
       <unknown> : 0
       <unknown> : 0xffffe1fc85d0
) --->        pi_result : PI_SUCCESS
---> piDeviceGetInfo(
       <unknown> : 0x9f073f0
       <unknown> : 4139
       <unknown> : 19
       <unknown> : 
       <unknown> : 0
) --->        pi_result : PI_SUCCESS
pthread-cortex-a72
SYCL Platform: ---> piPlatformGetInfo(
       pi_platform : 0xffff96c84008
       <unknown> : 2306
       <unknown> : 0
       <unknown> : 0
       <unknown> : 0xffffe1fc8570
) --->        pi_result : PI_SUCCESS
---> piPlatformGetInfo(
       pi_platform : 0xffff96c84008
       <unknown> : 2306
       <unknown> : 28
       <unknown> : @L�	
       <unknown> : 0
) --->        pi_result : PI_SUCCESS
Portable Computing Language
---> piContextGetInfo(
       <unknown> : 0x9ef8680
       <unknown> : 4227
       <unknown> : 4
       <unknown> : 0xffffe1fc800c
       <unknown> : 0
) --->        pi_result : PI_SUCCESS
---> piContextGetInfo(
       <unknown> : 0x9ef8680
       <unknown> : 4225
       <unknown> : 8
       <unknown> : 0x9ee8510
       <unknown> : 0xffffe1fc8010
) --->        pi_result : PI_SUCCESS
---> piextDeviceSelectBinary(
       <unknown> : 0x9f073f0
       <unknown> : 0x9ee7b00
       <unknown> : 1
       <unknown> : 0xffffe1fc80fc
) --->        pi_result : PI_SUCCESS
---> piDeviceGetInfo(
       <unknown> : 0x9f073f0
       <unknown> : 4136
       <unknown> : 4
       <unknown> : 0xffffe1fc8024
       <unknown> : 0
) --->        pi_result : PI_SUCCESS
---> piPlatformGetInfo(
       pi_platform : 0xffff96c84008
       <unknown> : 2305
       <unknown> : 0
       <unknown> : 0
       <unknown> : 0xffffe1fc7f80
) --->        pi_result : PI_SUCCESS
---> piPlatformGetInfo(
       pi_platform : 0xffff96c84008
       <unknown> : 2305
       <unknown> : 72
       <unknown> : 
       <unknown> : 0
) --->        pi_result : PI_SUCCESS
---> piProgramCreate(
       <unknown> : 0x9ef8680
       <unknown> : #
       <unknown> : 3968
       <unknown> : 0xffffe1fc7fe0
) --->        pi_result : -34
OpenCL API failed. OpenCL API returns: -34 (CL_INVALID_CONTEXT) -34 (CL_INVALID_CONTEXT)
OpenCL API failed. OpenCL API returns: -34 (CL_INVALID_CONTEXT) -34 (CL_INVALID_CONTEXT) -34 (CL_INVALID_CONTEXT)
---> piQueueRelease(
       <unknown> : 0x9ef1eb0
) --->        pi_result : PI_SUCCESS
---> piContextRelease(
       <unknown> : 0x9ef8680
) --->        pi_result : PI_SUCCESS
---> piDeviceRelease(
       <unknown> : 0x9f073f0
) --->        pi_result : PI_SUCCESS
---> piPlatformsGet(
       <unknown> : 0
       <unknown> : 0
       <unknown> : 0xffffe1fc831c
) --->        pi_result : PI_SUCCESS
---> piPlatformsGet(
       <unknown> : 2
       <unknown> : 0x9f044d0
       <unknown> : 0
) --->        pi_result : PI_SUCCESS
---> piDevicesGet(
       pi_platform : 0xffff96c84008
       <unknown> : 4294967295
       <unknown> : 0
       <unknown> : 0
       <unknown> : 0xffffe1fc818c
) --->        pi_result : PI_SUCCESS
---> piDevicesGet(
       pi_platform : 0xffff96c84008
       <unknown> : 4294967295
       <unknown> : 1
       <unknown> : 0x9ee7b00
       <unknown> : 0
) --->        pi_result : PI_SUCCESS
---> piDeviceGetInfo(
       <unknown> : 0x9f073f0
       <unknown> : 4096
       <unknown> : 8
       <unknown> : 0x9ee61c8
       <unknown> : 0
) --->        pi_result : PI_SUCCESS
---> piDeviceGetInfo(
       <unknown> : 0x9f073f0
       <unknown> : 4162
       <unknown> : 8
       <unknown> : 0xffffe1fc8048
       <unknown> : 0
) --->        pi_result : PI_SUCCESS
---> piDeviceRetain(
       <unknown> : 0x9f073f0
) --->        pi_result : PI_SUCCESS
---> piPlatformGetInfo(
       pi_platform : 0xffff96c84008
       <unknown> : 2306
       <unknown> : 0
       <unknown> : 0
       <unknown> : 0xffffe1fc8180
) --->        pi_result : PI_SUCCESS
---> piPlatformGetInfo(
       pi_platform : 0xffff96c84008
       <unknown> : 2306
       <unknown> : 28
       <unknown> : p��	
       <unknown> : 0
) --->        pi_result : PI_SUCCESS
---> piDeviceRelease(
       <unknown> : 0x9f073f0
) --->        pi_result : PI_SUCCESS
---> piDevicesGet(
       pi_platform : 0xffff91a3de18
       <unknown> : 4294967295
       <unknown> : 0
       <unknown> : 0
       <unknown> : 0xffffe1fc818c
) --->        pi_result : PI_SUCCESS
---> piPlatformsGet(
       <unknown> : 0
       <unknown> : 0
       <unknown> : 0xffffe1fc831c
) --->        pi_result : PI_SUCCESS
---> piDevicesGet(
       pi_platform : 0xffff96c84008
       <unknown> : 4294967295
       <unknown> : 0
       <unknown> : 0
       <unknown> : 0xffffe1fc832c
) --->        pi_result : PI_SUCCESS
---> piDevicesGet(
       pi_platform : 0xffff96c84008
       <unknown> : 4294967295
       <unknown> : 1
       <unknown> : 0x9ee5660
       <unknown> : 0
) --->        pi_result : PI_SUCCESS
---> piDeviceGetInfo(
       <unknown> : 0x9f073f0
       <unknown> : 4096
       <unknown> : 8
       <unknown> : 0x9efe6a8
       <unknown> : 0
) --->        pi_result : PI_SUCCESS
---> piDeviceGetInfo(
       <unknown> : 0x9f073f0
       <unknown> : 4162
       <unknown> : 8
       <unknown> : 0xffffe1fc81e8
       <unknown> : 0
) --->        pi_result : PI_SUCCESS
---> piDeviceRetain(
       <unknown> : 0x9f073f0
) --->        pi_result : PI_SUCCESS
---> piDeviceRelease(
       <unknown> : 0x9f073f0
) --->        pi_result : PI_SUCCESS
No device of requested type available. -1 (CL_DEVICE_NOT_FOUND)

[jeffhammond]

ComputeCpp fails in the same way, but provides a more helpful error message.

ubuntu@ubuntu:~/PRK/Cxx11$ make nstream-sycl
/opt/codeplay/latest/bin/compute++ -DPRKVERSION="2020" -sycl-driver -I/opt/codeplay/latest/include -L/opt/codeplay/latest/lib -Wl,-rpath=/opt/codeplay/latest/lib -lComputeCpp -std=c++14 -O3 -no-serial-memop -DUSE_2D_INDEXING=0 nstream-sycl.cc -o nstream-sycl
ubuntu@ubuntu:~/PRK/Cxx11$ ./nstream-sycl 10 10000000
Parallel Research Kernels version 2020
C++11/SYCL STREAM triad: A = B + scalar * C
Number of iterations = 10
Vector length        = 10000000
Offset               = 0
SYCL Device:   Host Device
SYCL Platform: Host Platform
Solution validates
32B Rate (MB/s): 759.205 Avg time (s): 0.210747
Solution validates
64B Rate (MB/s): 1497.16 Avg time (s): 0.213738
SYCL Device:   pthread-cortex-a72
SYCL Platform: Portable Computing Language
Error: [ComputeCpp:RT0100] Failed to build program (<Build log for program 0x2f24eeb0 (size: 42) SPIR support is not available for device 

>


)
program_detail.cpp
791
Error: [ComputeCpp:RT0100] Failed to build program (<Build log for program 0x2f24eeb0 (size: 42) SPIR support is not available for device 

>


)
 CL_BUILD_PROGRAM_FAILURE 
-11
Error: [ComputeCpp:RT0100] Failed to build program (<Build log for program 0x2f24cfd0 (size: 42) SPIR support is not available for device 

>


)
program_detail.cpp
791
Error: [ComputeCpp:RT0100] Failed to build program (<Build log for program 0x2f24cfd0 (size: 42) SPIR support is not available for device 

>


)
 CL_BUILD_PROGRAM_FAILURE 
-11
Error: [ComputeCpp:RT0106] Device not found
device_selector.cpp
96
Error: [ComputeCpp:RT0106] Device not found
Segmentation fault (core dumped)

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