Sorry if this is slightly off-topic but I didn't see a more applicable forum. I am trying to use Cilk offload for GPGPU applications and I can't find a driver that works with the E3-1585v5 / Iris Pro P580 in Windows 10. I have tried several drivers, both using the installer and manual install. It appears that the offload driver is not getting installed on the system:
[snip]
C:\>gfx_sys_check -v
Checking CPU
family:6 model:5e type:0 stepping:3 (signature:506e3)
Checking OS
Windows 8 x64
graphics timeout set to default (2 seconds)
Checking display
device:
Provider: Intel Corporation
Description: Intel(R) Iris(TM) Pro Graphics P580
Version: 21.20.16.4678
device:
Provider: ASPEED
Description: ASPEED Graphics Family(WDDM)
Version: 9.0.10.102
Checking Intel HD Graphics Driver
failed to load library igfx11cmrt64.dll (error#126)
[end snip]
Running "dir /s igfx11cmrt64.dll" from C:\ shows that the offload driver files are not in the C:\Windows\Sys* folders. If I navigate to the folder I extracted the driver into, gfx_sys_check does recognize the device:
[snip2]
Checking Intel HD Graphics Driver
DX11 version will be used
cm_version=600
RT Dll version: (6.0.0.1189)
JIT Dll version: (6.0.0.1189)
CAP_KERNEL_COUNT_PER_TASK=16
CAP_KERNEL_BINARY_SIZE=65536
CAP_SAMPLER_COUNT=64
CAP_SAMPLER_COUNT_PER_KERNEL=16
CAP_BUFFER_COUNT=256
CAP_SURFACE2D_COUNT=256
CAP_SURFACE3D_COUNT=64
CAP_SURFACE_COUNT_PER_KERNEL=255
CAP_ARG_COUNT_PER_KERNEL=255
CAP_ARG_SIZE_PER_KERNEL=2016
CAP_USER_DEFINED_THREAD_COUNT_PER_TASK=262144
CAP_HW_THREAD_COUNT=504
CAP_SURFACE2D_FORMAT_COUNT=26
CAP_SURFACE3D_FORMAT_COUNT=2
CAP_VME_STATE_G6_COUNT=8
CAP_GPU_PLATFORM=Skylake
CAP_GT_PLATFORM=GT4
CAP_MIN_FREQUENCY=350
CAP_MAX_FREQUENCY=1150
CAP_GPU_CURRENT_FREQUENCY=0
JIT version: 3.3
executing visa3.0 CmRT reported execution time 25999 nanosec
executing visa3.1 CmRT reported execution time 9249 nanosec
executing visa3.2 CmRT reported execution time 9083 nanosec
GPU architecture: skylake
vISA support: visa3.2
[end snip2]
Visa3.x CmRT seems to work but it isn't clear to me if that is offload or something else like DX11, OpenCL, etc.
I tried running some of the samples and my code--I thought they may run if I copy the exe into that folder; however, the code ran but from the execution time it was obviously running on a single CPU core and not offloaded. The code and samples both offload just fine on my other machine (i7-4810MQ w/HDG4600), so the driver issue notwithstanding, I can't rule out a compiler issue. I am using MSVS 2015 update 3 and Intel 2017 update 2 on both machines.
Thanks,
Randy