mirror of
https://github.com/smyalygames/FiniteVolumeGPU.git
synced 2025-05-18 14:34:13 +02:00
81 lines
3.2 KiB
Python
81 lines
3.2 KiB
Python
# -*- coding: utf-8 -*-
|
|
|
|
"""
|
|
This python module implements helpers for IPython / Jupyter and CUDA
|
|
|
|
Copyright (C) 2018 SINTEF ICT
|
|
|
|
This program is free software: you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation, either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
"""
|
|
|
|
import logging
|
|
|
|
from IPython.core.magic import line_magic, Magics, magics_class
|
|
import pycuda.driver as cuda
|
|
|
|
|
|
|
|
@magics_class
|
|
class CudaContextHandler(Magics):
|
|
@line_magic
|
|
def cuda_context_handler(self, context_name):
|
|
self.logger = logging.getLogger(__name__)
|
|
|
|
self.logger.debug("Registering %s as a global context", context_name)
|
|
|
|
if context_name in self.shell.user_ns.keys():
|
|
self.logger.debug("Context already registered! Ignoring")
|
|
return
|
|
else:
|
|
self.logger.debug("Creating context")
|
|
self.shell.ex(context_name + " = Common.CudaContext(verbose=True, blocking=False)")
|
|
|
|
# this function will be called on exceptions in any cell
|
|
def custom_exc(shell, etype, evalue, tb, tb_offset=None):
|
|
self.logger.exception("Exception caught: Resetting to CUDA context %s", context_name)
|
|
while (cuda.Context.get_current() != None):
|
|
context = cuda.Context.get_current()
|
|
self.logger.info("Popping <%s>", str(context.handle))
|
|
cuda.Context.pop()
|
|
|
|
if context_name in self.shell.user_ns.keys():
|
|
self.logger.info("Pushing <%s>", str(self.shell.user_ns[context_name].cuda_context.handle))
|
|
self.shell.ex(context_name + ".cuda_context.push()")
|
|
else:
|
|
self.logger.error("No CUDA context called %s found (something is wrong)", context_name)
|
|
self.logger.error("CUDA will not work now")
|
|
|
|
# still show the error within the notebook, don't just swallow it
|
|
shell.showtraceback((etype, evalue, tb), tb_offset=tb_offset)
|
|
|
|
# this registers a custom exception handler for the whole current notebook
|
|
get_ipython().set_custom_exc((Exception,), custom_exc)
|
|
|
|
|
|
# Handle CUDA context when exiting python
|
|
import atexit
|
|
def exitfunc():
|
|
self.logger.info("Exitfunc: Resetting CUDA context stack")
|
|
while (cuda.Context.get_current() != None):
|
|
context = cuda.Context.get_current()
|
|
self.logger.info("`-> Popping <%s>", str(context.handle))
|
|
cuda.Context.pop()
|
|
atexit.register(exitfunc)
|
|
|
|
logger = logging.getLogger(__name__)
|
|
logger.info("Registering automatic CUDA context handling")
|
|
logger.debug("(use %cuda_context_handler my_context to create a context called my_context")
|
|
ip = get_ipython()
|
|
ip.register_magics(CudaContextHandler)
|