Memory issue
Craig Helfgott
chelfgott at gmail.com
Fri Dec 17 01:10:42 CET 2010
What I am specifically asking is the following: 1) Do I need to run
mpf_clear if I am using mpf_class instead of mpf_t? 2) Is there any reason
that g++ with the -lgmp and -lgmpxx flags would automatically parallelize a
loop at compile-time?
> 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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