Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Memory allocation for particular process in UNIX
Top Forums Programming Memory allocation for particular process in UNIX Post 302936594 by kbw on Thursday 26th of February 2015 01:52:03 PM
Old 02-26-2015
"I want to allocate specific heap size for that process (C program) to run."

I see, I must have been answering the wrong question. Ok, lets start again.

C does have a "virtual machine". In fact, the C virtual machine pretty much maps onto a real machine, that's what makes C so fast, because there's no translation. The C virtual machine has a call stack and a heap formed at opposite ends of the same memory block. The stack may have a fixed size, but the heap is everything else. So if you put more RAM in the machine, it shows up as more heap.

If you need memory you use it and hand it back when done. There's no portable way to put an upper limit on the heap. You may be able to specify it some custom heap, but not in a general way,

If you need memory just allocate it. The Java VM should coexist with the underlying system allocator.

So, in short, you can't limit it in a general way, and it shouldn't bother you that you can't.
 

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

memory allocation

I would like to know how I could allocate some more memory to a process. Please note that I am not the root user. (1 Reply)
Discussion started by: sagar
1 Replies

2. UNIX for Advanced & Expert Users

threads and memory allocation

Hello! First of all, forgive me for bad English. When I starts new thread (pthread_create), system allocates some memory for it (for example, for thread's stack). I wonder when does it deallocate this memory? The problem is that I have a program which sometimes creates new threads and sometimes... (3 Replies)
Discussion started by: prankster
3 Replies

3. UNIX for Dummies Questions & Answers

HP-UX memory usage allocation

Hi all, I have a HP-UX Server with 4 gigabytes of physical RAM. When I use the 'Glance' utility to see what my memory utilization is, my memory usage shows up maxed out at 99%. I shut off all the known processes that I'm running on that box and the memory utilization is still at 78% (with Swap... (1 Reply)
Discussion started by: dehuang83
1 Replies

4. HP-UX

HP-UX memory usage allocation

Hi all, I have a HP-UX Server with 4 gigabytes of physical RAM. When I use the 'Glance' utility to see what my memory utilization is, my memory usage shows up maxed out at 99%. I shut off all the known processes that I'm running on that box and the memory utilization is still at 78% (with Swap... (3 Replies)
Discussion started by: dehuang83
3 Replies

5. Programming

memory allocation in subroutine

Hi everyone, I'm not new to C programming, but I'm having question regarding the memory allocation of a pointer variable which, for instance, will be declared in main(), but its memory will be allocated in subroutine. To clearify my question, I provide a small working example: #include... (1 Reply)
Discussion started by: MIB_Maik
1 Replies

6. Programming

Memory allocation in C

Hi Experts I need some help in static memory allocation in C. I have a program in which I declared 2 variables, one char array and one integer. I was little surprised to see the addresses of the variables. First: int x; char a; printf("%u %u\n', &x, a); I got the addresses displayed... (2 Replies)
Discussion started by: unx_freak
2 Replies

7. Shell Programming and Scripting

memory allocation to a variable

hello all.. i'm a beginner in shell scripting. I need to know what is really happening when we are creating a variable in shell scripting? how memory is allocated for that variable? (3 Replies)
Discussion started by: aarathy
3 Replies

8. HP-UX

Single Process Memory Allocation HP-UX 11i v3

Hi, I have HP-UX 11i v3 running on ia64. One of my application is 32-bit and I want to increase the memory allocation of this file upto 2GB. I am contentiously receiving an error message of Out of Memory. Can you please explain the procedure what kernel configuration( like maxdsize or... (1 Reply)
Discussion started by: ahmadamin416
1 Replies

9. Programming

C++/ROOT Memory Allocation?

Hello, I am new to C++ programming, so I'm still getting a feel for things. I recently wrote a simple C++ program (to be used as a ROOT Macro) to conduct a statistical analysis of a varied version of the Monty Hall problem (code below). Basically, the programs runs a few simple calculations to... (7 Replies)
Discussion started by: Tyler_92
7 Replies

10. UNIX for Dummies Questions & Answers

Memory allocation problem

I am using ubuntu. I have written a program to calculate prime factors. it works perfectly fine till entered number is less than 9989 (or so ) but when one enters a number higher than that, for example 15000, it does not work. Can anyone guide me whats the problem ? although new codes are welcome,... (2 Replies)
Discussion started by: Abhishek_kumar
2 Replies

LEARN ABOUT SUSE

mprof-heap-viewer

mprof-heap-viewer(1)					      General Commands Manual					      mprof-heap-viewer(1)

NAME

       mprof-heap-viewer - GUI viewer for the logging profiler heap snapshots

SYNOPSIS

       mprof-heap-viewer file

DESCRIPTION

       mprof-heap-viewer GUI viewer for the logging profiler heap snapshots

       WARNING: this application is unfinished and experimental.  Nevertheless it should work, and bug reports are encouraged.

       This program decodes the contents of a logging profiler output file and locates all the heap snapshots inside it.  The user can then select
       each individual snapshot and decide to load it in memory and explore its contents.

       The GUI is organized to work on "object sets" (listed in a tree view on the left).  All operations are performed with a popup menu  on  the
       choosen set.

       Initially  the  sets are the heap snapshots (of course a heap snapshot can be considered a set of objects!).  For each set the GUI shows on
       the right a list that breaks it down by class (one row for each class).

       The user can then refine each set using a "filter", to select a subset.	Examples of filters are "all objects of class X", or "all  objects
       that reference an object of class X".  This way the user explores the sets breaking them down to subsets (each subset in the GUI is a child
       of its owner set on the tree view).

       Moreover the user can issue a "compare" operation between two arbitrary sets A and B, which will compute two subsets: "A - B" (the  objects
       of  A  which  are  not  in  B,  a subsect of A) and "B - A" (the reverse).  This can help in understanding what changed on the heap between
       garbage collections.

Options
       None

ENVIRONMENT VARIABLES

       None

SEE ALSO

       mono(1)

COPYRIGHT

       Copyright (C) 2008 Novell, Inc (http://www.novell.com)

															      mprof-heap-viewer(1)
All times are GMT -4. The time now is 09:53 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy