Hi Golam,
On Mon, Jul 27, 2009 at 12:01 PM, Golam Mortuza
Hossain<gmhoss...@gmail.com> wrote:
>
> Hi,
>
> While doing some symbolic computations that require
> Maxima interface, "timeit" reports progressively
> longer duration for the same computation.
>
> ---------
> sage: f(x) = function('f',x);
> sage: timeit('bool( f(x) == 0 )')
> 5 loops, best of 3: 71.6 ms per loop
> sage: timeit('bool( f(x) == 0 )')
> 5 loops, best of 3: 89.1 ms per loop
> sage: timeit('bool( f(x) == 0 )')
> 5 loops, best of 3: 101 ms per loop
> sage: timeit('bool( f(x) == 0 )')
> 5 loops, best of 3: 127 ms per loop
> sage: timeit('bool( f(x) == 0 )')
> 5 loops, best of 3: 159 ms per loop
> sage: timeit('bool( f(x) == 0 )')
> 5 loops, best of 3: 231 ms per loop
> sage: timeit('bool( f(x) == 0 )')
> 5 loops, best of 3: 305 ms per loop
> -----------
>
> Is something leaking in the maxima interface?
There is definitely memory leak. Here is the output of a valgrind session:
[mv...@sage ~]$ sage -valgrind --leak-check=full --show-reachable=yes
----------------------------------------------------------------------
| Sage Version 4.1, Release Date: 2009-07-09 |
| Type notebook() for the GUI, and license() for information. |
----------------------------------------------------------------------
/usr/local/sage/local/bin/sage-ipython
Log file is /home/mvngu/.sage/valgrind/sage-memcheck.%p
Using default flags:
--leak-resolution=high
--log-file=/home/mvngu/.sage/valgrind/sage-memcheck.%p
--leak-check=full --num-callers=25
--suppressions=/usr/local/sage/local/lib/valgrind/sage.supp
Python 2.6.2 (r262:71600, Jul 10 2009, 10:49:45)
[GCC 4.2.4 (Ubuntu 4.2.4-1ubuntu3)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
sage: f(x) = function('f',x)
sage: timeit('bool( f(x) == 0 )')
5 loops, best of 3: 779 ms per loop
sage: timeit('bool( f(x) == 0 )')
5 loops, best of 3: 676 ms per loop
sage: timeit('bool( f(x) == 0 )')
5 loops, best of 3: 837 ms per loop
sage: timeit('bool( f(x) == 0 )')
5 loops, best of 3: 791 ms per loop
sage: timeit('bool( f(x) == 0 )')
5 loops, best of 3: 755 ms per loop
sage: timeit('bool( f(x) == 0 )')
5 loops, best of 3: 860 ms per loop
sage: timeit('bool( f(x) == 0 )')
5 loops, best of 3: 815 ms per loop
Here's a leak summary:
==11471== LEAK SUMMARY:
==11471== definitely lost: 8 bytes in 1 blocks.
==11471== possibly lost: 473,247 bytes in 1,119 blocks.
==11471== still reachable: 48,988,835 bytes in 32,885 blocks.
==11471== suppressed: 0 bytes in 0 blocks.
--
Regards
Minh Van Nguyen
--~--~---------~--~----~------------~-------~--~----~
To post to this group, send email to sage-devel@googlegroups.com
To unsubscribe from this group, send email to
sage-devel-unsubscr...@googlegroups.com
For more options, visit this group at http://groups.google.com/group/sage-devel
URLs: http://www.sagemath.org
-~----------~----~----~----~------~----~------~--~---
