#11920: Sympow needs specify -ffp-contract=on and should create datafiles
------------------------------+---------------------------------------------
Reporter: jdemeyer | Owner: tbd
Type: defect | Status: needs_work
Priority: major | Milestone: sage-4.7.3
Component: packages | Keywords:
Work_issues: | Upstream: None of the above - read trac
for reasoning.
Reviewer: Leif Leonhardy | Author: Jeroen Demeyer
Merged: | Dependencies:
------------------------------+---------------------------------------------
Comment(by leif):
Replying to [comment:13 leif]:
> FWIW, both with the p9 (with `-O3`, and '''without''' `-mno-fused-madd`,
which is AFAIK the default) and with the p10 (with `-mno-fused-madd`) all
(long) tests in
>
> `sage/lfunctions/sympow.py`
>
> pass. So you should probably change your check to detect whether the
doubles are 64-bit / have a 53-bit mantissa.
With the p9 (and '''with''' `-mfused-add`):
{{{
#!sh
$ time env SAGE_TEST_ITER=20 ./sage -tp 1 -long
devel/sage/sage/lfunctions/sympow.py
Testing that Sage starts...
Yes, Sage starts.
Global iterations: 1
File iterations: 20
No long cached timings exist; will create for successful files.
Doctesting 1 file using 1 thread
sage -t -long devel/sage/sage/lfunctions/sympow.py
[10.2 s]
----------------------------------------------------------------------
All tests passed!
Timings have been updated.
Total time for all tests: 232.1 seconds
real 3m54.484s
user 3m39.864s
sys 0m11.631s
}}}
With the p10:
{{{
#!sh
$ time env SAGE_TEST_ITER=20 ./sage -tp 1 -long
devel/sage/sage/lfunctions/sympow.py
Testing that Sage starts...
Yes, Sage starts.
Global iterations: 1
File iterations: 20
Using long cached timings to run longest doctests first.
Doctesting 1 file using 1 thread
sage -t -long devel/sage/sage/lfunctions/sympow.py
[11.4 s]
----------------------------------------------------------------------
All tests passed!
Timings have been updated.
Total time for all tests: 238.5 seconds
real 4m0.566s
user 3m44.169s
sys 0m11.777s
}}}
(Both packages compiled with `-O3 -march=power7 -mtune=power7`.)
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/11920#comment:14>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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