create_sycl_queues.py

#                      Data Parallel Control (dpCtl)
#
# Copyright 2020-2021 Intel Corporation
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#    http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

"""Demonstrates SYCL queue selection operations provided by dpctl.
"""

from __future__ import print_function

import dpctl
from dpctl import device_context, device_type


# Global runtime object inside dpctl
rt = dpctl

# Print metadata about the runtime
rt.dump()

# The runtime is initialized with a default context defined using sycl's
# default_selector. The Sycl queue for that context is returned by
# get_current_queue in a Py_Capsule.
queue = rt.get_current_queue()
print(dir(queue))

# Get a context for CPU 0 (Needs OpenCL CPU driver's). The context on exiting
# the with device_context scope gets reset to what ever context was set
# at entry of the scope. For this case, the context would go back to the
# default context
with device_context("opencl:cpu:0") as cpu_queue:
    print("========================================")
    print("Current context inside with scope")
    print("========================================")
    cpu_queue.get_sycl_device().dump_device_info()

    # Note the current context can be either directly accessed by using
    # the "cpu_queue" object, or it can be accessed via the runtime's
    # get_current_queue() function.
    print("========================================")
    print("Looking up current context using runtime")
    print("========================================")
    rt.get_current_queue().get_sycl_device().dump_device_info()


print("========================================")
print("Current context after exiting with scope")
print("========================================")
rt.get_current_queue().get_sycl_device().dump_device_info()