If I restart the kernel multiprocessing gets reset back to spawn. Rather
than have to set it back to fork in every cell it should be set to fork by
the kernel restart code.
On Friday, January 28, 2022 at 2:04:43 PM UTC egourg...@gmail.com wrote:
> Le jeudi 27 janvier 2022 à 18:59:36 UTC+1,
Le jeudi 27 janvier 2022 à 18:59:36 UTC+1, alan_thoma...@yahoo.co.uk a
écrit :
> That works. I get all cores used.
>
Great!
I've opened the ticket https://trac.sagemath.org/ticket/33241 for that.
Eric.
--
You received this message because you are subscribed to the Google Groups
mp.set_start_method('fork',force=True)
lets one rerun the notebook without restarting.
On Thursday, January 27, 2022 at 5:59:36 PM UTC Alan Stafford wrote:
> That works. I get all cores used.
> On Thursday, January 27, 2022 at 1:20:26 PM UTC egourg...@gmail.com wrote:
>
>> Le mardi 25 janvier
if mp.get_start_method() != 'fork' : mp.set_start_method('fork')
Lets one rerun the notebook without restarting the kernel.
On Thursday, January 27, 2022 at 5:59:36 PM UTC Alan Stafford wrote:
> That works. I get all cores used.
> On Thursday, January 27, 2022 at 1:20:26 PM UTC
Adding :
import multiprocessing as mp
if mp.get_start_method != 'fork' : mp.set_start_method('fork')
Lets one rerun the notebook without restarting the kernel.
One can delete the line:
os.environ['SAGE_NUM_THREADS'] = '4'
On Thursday, January 27, 2022 at 5:59:36 PM UTC Alan Stafford wrote:
>
That works. I get all cores used.
On Thursday, January 27, 2022 at 1:20:26 PM UTC egourg...@gmail.com wrote:
> Le mardi 25 janvier 2022 à 23:59:20 UTC+1, John H Palmieri a écrit :
>
>> Are you using OS X? Could this possibly be due to how Python handles
>> multiprocessing on OS X vs. other
Le mardi 25 janvier 2022 à 23:59:20 UTC+1, John H Palmieri a écrit :
> Are you using OS X? Could this possibly be due to how Python handles
> multiprocessing on OS X vs. other platforms? (See
>
> https://docs.python.org/3/library/multiprocessing.html#contexts-and-start-methods,
>
> in
ImportError: cannot import name 'NumberField' from partially initialized
module 'sage.rings.number_field.number_field' (most likely due to a
circular import)
SageMath 9.1 works with the 9.5 version of ncpus.py so one can disregard my
tinkering with it.
On Wednesday, January 26, 2022 at 10:12:33 AM UTC Alan Stafford wrote:
> I am using Mac OS 12.1 Monterey. The notebook works on Sagemath 9.1 if I
> hack ncpus.py to return 4.
>
> On Tuesday,
I am using Mac OS 12.1 Monterey. The notebook works on Sagemath 9.1 if I
hack ncpus.py to return 4.
On Tuesday, January 25, 2022 at 10:59:20 PM UTC John H Palmieri wrote:
> Are you using OS X? Could this possibly be due to how Python handles
> multiprocessing on OS X vs. other platforms? (See
Are you using OS X? Could this possibly be due to how Python handles
multiprocessing on OS X vs. other platforms? (See
https://docs.python.org/3/library/multiprocessing.html#contexts-and-start-methods,
in particular the comment "On macOS, the *spawn* start method is now the
default" and
Process SpawnPoolWorker-1: Traceback (most recent call last): File
"/private/var/tmp/sage-9.5-current/local/var/lib/sage/venv-python3.9.9/lib/python3.9/multiprocessing/process.py",
line 315, in _bootstrap self.run() File
Hi,
Le mardi 25 janvier 2022 à 12:54:57 UTC+1, alan_thoma...@yahoo.co.uk a
écrit :
> I get errors in this notebook if I set the variable tpar to any value
> greater than one. (Number of Tensor processing cores.)
>
> *http://alan.atstafford.co.uk/Sage9.5Problem.ipynb
>
13 matches
Mail list logo
