Memory issue
Torbjorn Granlund
tg at gmplib.org
Fri Dec 17 00:31:32 CET 2010
Craig Helfgott <chelfgott at gmail.com> writes:
I am in the process of writing a program using GMP in C++, and am hitting a
memory issue. Specifically, I have a subroutine that will output e^x for x
an mpf_class variable. It works using the standard binary splitting
algorithm, and is fairly fast even though I am currently working with
32,768-bit numbers. I am running it a few thousand times in the inner loop
of my program. I of course expect this to take some time, perhaps a day at
most, but I do not expect it to take much memory, since I only have at most
50 such variables active at any one time. However, when I run my program,
it immediately eats up the memory in my system. Do I need to do mpf_clear
in my exp subroutine? (I thought the C++ interface would handle that for
me.) Is my compiler for some reason unwrapping my loop and trying to
parallelize? (I'm using g++ with no special flags aside from -lgmp and
-lgmpxx).
I don't understand how you think we can help you. Are we supposed to
somehow know how your source looks, and understand if it has a memory
leak?
--
Torbjörn
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