mirror of
https://github.com/smyalygames/FiniteVolumeGPU.git
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119 lines
4.8 KiB
Python
119 lines
4.8 KiB
Python
# -*- coding: utf-8 -*-
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"""
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This python module implements helpers for IPython / Jupyter and CUDA
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Copyright (C) 2018 SINTEF ICT
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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"""
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import logging
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from IPython.core import magic_arguments
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from IPython.core.magic import line_magic, Magics, magics_class
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import pycuda.driver as cuda
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from GPUSimulators import Common
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@magics_class
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class MyIPythonMagic(Magics):
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@line_magic
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def cuda_context_handler(self, context_name):
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self.logger = logging.getLogger(__name__)
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self.logger.debug("Registering %s as a global context", context_name)
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if context_name in self.shell.user_ns.keys():
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self.logger.debug("Context already registered! Ignoring")
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return
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else:
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self.logger.debug("Creating context")
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#self.shell.ex(context_name + " = Common.CudaContext(blocking=False)")
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self.shell.user_ns[context_name] = Common.CudaContext(blocking=False)
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# this function will be called on exceptions in any cell
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def custom_exc(shell, etype, evalue, tb, tb_offset=None):
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self.logger.exception("Exception caught: Resetting to CUDA context %s", context_name)
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while (cuda.Context.get_current() != None):
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context = cuda.Context.get_current()
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self.logger.info("Popping <%s>", str(context.handle))
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cuda.Context.pop()
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if context_name in self.shell.user_ns.keys():
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self.logger.info("Pushing <%s>", str(self.shell.user_ns[context_name].cuda_context.handle))
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#self.shell.ex(context_name + ".cuda_context.push()")
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self.shell.user_ns[context_name].cuda_context.push()
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else:
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self.logger.error("No CUDA context called %s found (something is wrong)", context_name)
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self.logger.error("CUDA will not work now")
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self.logger.debug("==================================================================")
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# still show the error within the notebook, don't just swallow it
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shell.showtraceback((etype, evalue, tb), tb_offset=tb_offset)
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# this registers a custom exception handler for the whole current notebook
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get_ipython().set_custom_exc((Exception,), custom_exc)
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# Handle CUDA context when exiting python
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import atexit
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def exitfunc():
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self.logger.info("Exitfunc: Resetting CUDA context stack")
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while (cuda.Context.get_current() != None):
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context = cuda.Context.get_current()
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self.logger.info("`-> Popping <%s>", str(context.handle))
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cuda.Context.pop()
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self.logger.debug("==================================================================")
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atexit.register(exitfunc)
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@line_magic
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@magic_arguments.magic_arguments()
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@magic_arguments.argument(
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'--out', '-o', type=str, default='output.log', help='The filename to store the log to')
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@magic_arguments.argument(
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'--level', '-l', type=int, default=20, help='The level of logging to screen [0, 50]')
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@magic_arguments.argument(
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'--file_level', '-f', type=int, default=10, help='The level of logging to file [0, 50]')
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def setup_logging(self, line):
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args = magic_arguments.parse_argstring(self.setup_logging, line)
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import sys
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#Get root logger
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logger = logging.getLogger('')
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logger.setLevel(min(args.level, args.file_level))
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#Add log to screen
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ch = logging.StreamHandler()
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ch.setLevel(args.level)
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logger.addHandler(ch)
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logger.log(args.level, "Console logger using level %s", logging.getLevelName(args.level))
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#Add log to file
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logger.log(args.level, "File logger using level %s to %s", logging.getLevelName(args.file_level), args.out)
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fh = logging.FileHandler(args.out)
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formatter = logging.Formatter('%(asctime)s:%(name)s:%(levelname)s: %(message)s')
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fh.setFormatter(formatter)
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fh.setLevel(args.file_level)
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logger.addHandler(fh)
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logger.info("Python version %s", sys.version)
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# Register
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ip = get_ipython()
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ip.register_magics(MyIPythonMagic)
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