Feature/sycl device parent #366
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Another example showcasing In [1]: import dpctl
In [2]: cpu_d = dpctl.SyclDevice("cpu")
In [3]: sd0, sd1 = cpu_d.create_sub_devices(partition=(6,6))
In [4]: sd0.parent_device == cpu_d
Out[4]: True
In [5]: sd1.parent_device == cpu_d
Out[5]: True |
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diptorupd
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Apr 7, 2021
This returns None for root devices, but returns a SyclDevice for
a sub-device.
Added cpdef method equals, and Python method __eq__
```
Python 3.7.9 (default, Mar 10 2021, 05:18:00)
Type 'copyright', 'credits' or 'license' for more information
IPython 7.22.0 -- An enhanced Interactive Python. Type '?' for help.
In [1]: import dpctl
In [2]: cpu_device = dpctl.SyclDevice("cpu")
In [3]: cpu_device == cpu_device
Out[3]: True
In [4]: cpu_device2 = dpctl.SyclDevice("cpu")
In [5]: cpu_device == cpu_device2
Out[5]: True
In [6]: [d1, d2, d3 ] =cpu_device.create_sub_devices(partition=4)
In [7]: d1.parent_device == cpu_device
Out[7]: True
In [8]: d2.parent_device == cpu_device
Out[8]: True
In [9]: d3.parent_device == cpu_device
Out[9]: True
```
This computes the relative id (position in the vector) inside p.get_devices( sycl_device_type(DRef) ). Returns -1 is the device was not found (expected to happen for sub-devices).
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```
In [1]: import dpctl
In [2]: dpctl.SyclDevice("cpu").filter_string
Out[2]: 'opencl:cpu:0'
In [3]: dpctl.SyclDevice("gpu").filter_string
Out[3]: 'level_zero:gpu:0'
In [4]: dpctl.SyclDevice("opencl:gpu").filter_string
Out[4]: 'opencl:gpu:0'
In [5]: dpctl.SyclDevice().filter_string
Out[5]: 'level_zero:gpu:0'
In [6]: dpctl.SyclDevice("0").filter_string
Out[6]: 'opencl:accelerator:0'
In [7]: dpctl.SyclDevice("1").filter_string
Out[7]: 'opencl:cpu:0'
In [8]: dpctl.SyclDevice("2").filter_string
Out[8]: 'opencl:cpu:0'
In [9]: dpctl.SyclDevice("3").filter_string
Out[9]: 'opencl:gpu:0'
In [10]: dpctl.SyclDevice("4").filter_string
Out[10]: 'level_zero:gpu:0'
```
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This PR adds two functions to C-API:
DPCTLDevice_GetParentDevice(const DPCTLSyclDeviceRef DRef)- gives opaque reference to parentsycl::deviceifDRefis associated with a root device, or anullptrotherwise.DPCTLDeviceMgr_GetRelativeId(const DPCTLSyclDeviceRef DRef)- gives index ofsycl::devicereferenced byDRefinDRef_platform.get_device( DRef_device_type ), or-1is the device was not found (expected for sub-devices).Implemented
parent_deviceproperty inSyclDeviceas well as propertiesdevice_filter_tupleanddevice_filter_string.