# Data Parallel Control (dpctl)## Copyright 2020-2024 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.fromcontextlibimportcontextmanagerfromosimportenviron,getenvfromplatformimportsystemassys_platform__doc__=("Implementation module of :class:`dpctl.utils.onetrace_enabled` ""context manager.")_UNCHECKED=sys_platform()=="Linux"delsys_platform
[docs]@contextmanagerdefonetrace_enabled():"""Enable ``onetrace`` collection for kernels executed in this context. .. note:: Proper working of this utility assumes that Python interpreter has been launched by ``onetrace`` or ``unitrace`` tool from project `intel/pti-gpu <https://github.com/intel/pti-gpu>`_. :Example: Launch the Python interpreter using `onetrace` tool: .. code-block:: bash $ onetrace --conditional-collection -v -t --demangle python app.py Now using the context manager in the Python sessions enables data collection and its output for every offloaded kernel: .. code-block:: python import dpctl.tensor as dpt from dpctl.utils import onetrace_enabled # onetrace output reporting on execution of the kernel # should be seen, starting with "Device Timeline" with onetrace_enabled(): a = dpt.arange(100, dtype='int16') Sample output: .. code-block:: text >>> with onetrace_enabled(): ... a = dpt.arange(100, dtype='int16') ... Device Timeline (queue: 0x555aee86bed0): dpctl::tensor::kernels::constructors::linear_sequence_step_kernel<short>[SIMD32 {1; 1; 1} {100; 1; 1}]<1.1> [ns] = 44034325658 (append) 44034816544 (submit) 44036296752 (start) 44036305918 (end) >>> """global_UNCHECKEDif_UNCHECKED:_UNCHECKED=Falseifnot(getenv("PTI_ENABLE",None)=="1"and"onetrace_tool"ingetenv("LD_PRELOAD","")):importwarningswarnings.warn("It looks like Python interpreter was not started using ""`onetrace` utility. Using `onetrace_enabled` may have ""no effect. See `onetrace_enabled.__doc__` for usage.",RuntimeWarning,stacklevel=2,)_env_var_name="PTI_ENABLE_COLLECTION"saved=getenv(_env_var_name,None)try:environ[_env_var_name]="1"yieldfinally:ifsavedisNone:delenviron[_env_var_name]else:environ[_env_var_name]=saved