I see this too (I'm using OS X, don't know the situation for other
platforms). I think the problem is somehow with Python3. If I modify the
src/bin/sage-env script (which is where SAGE_NUM_THREADS gets read and
perhaps modified) to directly run the script sage-num-threads.py, I get an
error, and that error means that sage-env uses the default value of "1" for
SAGE_NUM_THREADS.
I applied this change:
diff --git a/src/bin/sage-env b/src/bin/sage-env
index 5a53ab1d2c..3000b4d983 100644
--- a/src/bin/sage-env
+++ b/src/bin/sage-env
@@ -580,6 +580,9 @@ case "$SAGE_NUM_THREADS,$SAGE_NUM_THREADS_PARALLEL" in
# First, figure out the right values for SAGE_NUM_THREADS (default
# number of threads) and SAGE_NUM_THREADS_PARALLEL (default number
of
# threads when parallel execution is asked explicitly).
+
+ sage-num-threads.py
+
sage_num_threads_array=$(sage-num-threads.py 2>/dev/null || echo 1
2 1)
sage_num_threads_array="${sage_num_threads_array% *}" # strip
third item
SAGE_NUM_THREADS="${sage_num_threads_array% *}" # keep first item
If I run "sage" or "sage -sh", I see
/Users/palmieri/Sage/git/sage/local/var/lib/sage/venv-python3.12/bin/sage-num-threads.py:4:
DeprecationWarning: pkg_resources is deprecated as an API. See
https://setuptools.pypa.io/en/latest/pkg_resources.html
__import__('pkg_resources').require('sagemath-standard==10.6b8')
Traceback (most recent call last):
File
"/Users/palmieri/Sage/git/sage/local/var/lib/sage/venv-python3.12/lib/python3.12/site-packages/pkg_resources/__init__.py",
line 656, in _build_master
ws.require(__requires__)
File
"/Users/palmieri/Sage/git/sage/local/var/lib/sage/venv-python3.12/lib/python3.12/site-packages/pkg_resources/__init__.py",
line 1063, in require
needed = self.resolve(parse_requirements(requirements))
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File
"/Users/palmieri/Sage/git/sage/local/var/lib/sage/venv-python3.12/lib/python3.12/site-packages/pkg_resources/__init__.py",
line 890, in resolve
dist = self._resolve_dist(
^^^^^^^^^^^^^^^^^^^
File
"/Users/palmieri/Sage/git/sage/local/var/lib/sage/venv-python3.12/lib/python3.12/site-packages/pkg_resources/__init__.py",
line 936, in _resolve_dist
raise VersionConflict(dist, req).with_context(dependent_req)
pkg_resources.ContextualVersionConflict: (sphinxcontrib-htmlhelp 2.0.5
(/Users/palmieri/Sage/git/sage/local/var/lib/sage/venv-python3.12/lib/python3.12/site-packages),
Requirement.parse('sphinxcontrib-htmlhelp>=2.0.6'), {'sphinx'})
Sage provides sphinxcontrib-htmlhelp 2.0.5. I don't know what's looking for
2.0.6; I got no hits when I ran 'git grep "2[.]0[.]6" '.
On Tuesday, March 11, 2025 at 4:13:41 PM UTC-7 enriqu...@gmail.com wrote:
>
> For 10.5 with python 3.12.5, sage.parallel.ncpus.ncpus() is 1 without
> giving a value to SAGE_NUM_THREADS and 16 if sage is opened as
> "SAGE_NUM_THREADS=16
> sage". For 10.6.beta9 (python 3.13.2), the value is always one; in another
> computer 10.6.beta9 is using python 3.12.5 and the value is always one.
> El miércoles, 12 de marzo de 2025 a las 6:15:27 UTC+9, dim...@gmail.com
> escribió:
>
>> On Mon, Mar 10, 2025 at 4:28 AM enriqu...@gmail.com
>> <enriqu...@gmail.com> wrote:
>> >
>> > If I set the variable SAGE_NUM_THREADS to a number of cores before
>> opening a sage session (command line or jupyterlab) there is a different
>> behaviour in 10.5 and in 10.6beta;
>> > parallel computation can be done in 10.5, there is no effect in the
>> beta version (I do not know when it started to fail). In the beta version
>> parallel computation is possible declaring the number of cores using the
>> following hack (suggested to me at some point by Miguel Marco)
>> > def miscpus():
>> > return "put here the number of cores"
>> > sage.parallel.ncpus.ncpus=miscpus
>> > Is it possible to know when SAGE_NUM_THREADS lost its effects?
>>
>> what is the output of sage.parallel.ncpus.ncpus() in 10.5 and in
>> 10.6.beta* for you?
>> (without using the hack above). Are they using the same Python version?
>>
>> The code for sage.parallel.ncpus.ncpus didn't change for a year, since
>> 10.3.
>>
>> Dima
>>
>>
>>
>>
>> > Thanks, Enrique.
>> >
>> > --
>> > You received this message because you are subscribed to the Google
>> Groups "sage-devel" group.
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>> an email to sage-devel+...@googlegroups.com.
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>> https://groups.google.com/d/msgid/sage-devel/fe02ae5f-64ab-4fb5-a826-d97f3d418dccn%40googlegroups.com.
>>
>>
>>
>
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