Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Overhead of using a shared library
Top Forums UNIX for Dummies Questions & Answers Overhead of using a shared library Post 302424094 by Dongping84 on Tuesday 25th of May 2010 08:15:06 AM
Old 05-25-2010
Overhead of using a shared library
Hi,
I found a very strange thing when I linked my executable with a shared library. That is the executable only references a small function of the shared library, and the size of this function is only hundred bytes, but when I check the /proc/pid/smaps, I found that the 'Rss' of this shared library is 76 KB that is much larger than the actual size of the referenced function. I just wonder why it is. What's the extra data in this 76 KB of memory? Thanks in advance.

Code:
00c4e000-00d73000 r-xp 00000000 00:15 38896026   /home/xhbf63/Desktop/libnewshared.so
Size:               1172 kB
Rss:                  76 kB
Pss:                  76 kB
Shared_Clean:          0 kB
Shared_Dirty:          0 kB
Private_Clean:        76 kB
Private_Dirty:         0 kB
Referenced:           76 kB
Swap:                  0 kB
KernelPageSize:        4 kB
MMUPageSize:           4 kB



---------- Post updated at 08:34 AM ---------- Previous update was at 06:37 AM ----------

Can anybody tell me the reason???

---------- Post updated 05-25-10 at 07:15 AM ---------- Previous update was 05-24-10 at 08:34 AM ----------

Cheers!!!
Last edited by Scott; 05-24-2010 at 08:55 AM.. Reason: Code tags
 

10 More Discussions You Might Find Interesting

1. Programming

Shared Library

hello all I want to work in shared libraries how can i work in Linux Environment ? (2 Replies)
Discussion started by: rajashekaran
2 Replies

2. HP-UX

Shared Library Problem

I have this error when I try to do check on the oracle database... Can you help me figure out whats the problem? Thanks for all the help! /usr/lib/pa20_64/dld.sl: Unable to find library 'libjox8.sl'. /usr/lib/pa20_64/dld.sl: Unable to find library 'libjox8.sl'. ... (1 Reply)
Discussion started by: vinz
1 Replies

3. UNIX for Advanced & Expert Users

shared library

What is the primary difference between static library and dynamic library? and how to write static shared library? (1 Reply)
Discussion started by: areef4u
1 Replies

4. Programming

Shared memory in shared library

I need to create a shared library to access an in memory DB. The DB is not huge, but big enough to make it cumbersome to carry around in every single process using the shared library. Luckily, it is pretty static information, so I don't need to worry much about synchronizing the data between... (12 Replies)
Discussion started by: DreamWarrior
12 Replies

5. Programming

Shared memory for shared library

I am writing a shared library in Linux (but compatible with other UNIXes) and I want to allow multiple instances to share a piece of memory -- 1 byte is enough. What's the "best" way to do this? I want to optimize for speed and portability. Obviously, I'll have to worry about mutual exclusion. (0 Replies)
Discussion started by: otheus
0 Replies

6. HP-UX

Shared Library Issue HP UX

I have never seen this issue before, but here is what is happening. I link an executable against two dynamic mlib libraries veclib and lapack. We place a newer version of these libraries in a write only directory and point the shlib_path at that directory. When the executable runs, it gets a... (3 Replies)
Discussion started by: sambarusty
3 Replies

7. Shell Programming and Scripting

How to change a Makefile from building static library to shared library?

Hi: I have a library that it only offers Makefile for building static library. It built libxxx.a file. How do I in any way build a shared library? (either changin the Makefile or direct script or command to build shared library) Thanks. (1 Reply)
Discussion started by: cpthk
1 Replies

8. Programming

Loading the shared library I want

Hi All I have been given by someone else header file and a shared library to be used by my C++ application. Compilation is fine but when I try to executes the application I receive the following error. ./first: error while loading shared libraries: libMyLib.so.9: cannot open shared object file:... (2 Replies)
Discussion started by: manustone
2 Replies

9. Programming

Shared library with acces to shared memory.

Hello. I am new to this forum and I would like to ask for advice about low level POSIX programming. I have to implement a POSIX compliant C shared library. A file will have some variables and the shared library will have some functions which need those variables. There is one special... (5 Replies)
Discussion started by: iamjag
5 Replies

10. AIX

Add shared members from library to same library in a different directory

I'm trying to install libiconv to AIX 7.1 from an rpm off of the perzl site. The rpm appears to install but I get this error message. add shr4.o shared members from /usr/lib/libiconv.a to /opt/freeware/lib/libiconv.a add shr.o shared members from /usr/lib/libiconv.a to ... (5 Replies)
Discussion started by: kneemoe
5 Replies

LEARN ABOUT HPUX

what-patch

WHAT-PATCH(1)						      General Commands Manual						     WHAT-PATCH(1)

NAME

       what-patch - detect which patch system a Debian package uses

SYNOPSIS

       what-patch [options]

DESCRIPTION

       what-patch examines the debian/rules file to determine which patch system the Debian package is using.

       what-patch should be run from the root directory of the Debian source package.

OPTIONS

       Listed below are the command line options for what-patch:

       -h, --help
	      Display a help message and exit.

       -v     Enable verbose mode.  This will include the listing of any files modified outside or the debian/ directory and report any additional
	      details about the patch system if available.

AUTHORS

       what-patch was written by Kees Cook <kees@ubuntu.com>, Siegfried-A. Gevatter <rainct@ubuntu.com>, and  Daniel  Hahler  <ubuntu@thequod.de>,
       among others.  This manual page was written by Jonathan Patrick Davies <jpds@ubuntu.com>.

       Both are released under the GNU General Public License, version 3 or later.

SEE ALSO

       The Ubuntu MOTU team has some documentation about patch systems at the Ubuntu wiki: https://wiki.ubuntu.com/PackagingGuide/PatchSystems

       cdbs-edit-patch(1), dbs-edit-patch(1), dpatch-edit-patch(1)

DEBIAN
								 Debian Utilities						     WHAT-PATCH(1)
All times are GMT -4. The time now is 12:51 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy