Yes. For example say you call a bunch of functions or sub-routines in a c-program, they would appear on the call stack in the following order (where function2() is the most recent function to be called, function1() was called before function2() etc... )
:confused:
Hi!
I have created a Multhreaded Application in Pro*C (using pthreads) with about 5 Threads running simultaneously. The Application is basically to Update a Centralized Table in Oracle, which updates different rows in the Table (Each Thread updates different rows!). The... (16 Replies)
Hi all, I have a query about multithreading. What I would like to do is, at the start of my main update() function, start a couple of threads in parallel, once they are all complete carry on with my main update function.
void update() {
thread1->update(); // fluid solver
... (3 Replies)
Hi
I need to insert 1million records into MySQL database, but it is taking lot of time as there is no bulk insert support.
I want to spawn 10 processes which will insert 100k records each parallely.
Can somebody help me with a example program to execute this task through shell scripting. (5 Replies)
Situation:
i have multiple pthread_create calls like this:
pthread_create(...., ThreadFunc1,.....);
pthread_create(...., ThreadFunc2,.....);
.
.
which i am using to create multiple threads.All the "ThreadFunc<i>" functions are actually calling same function "Receive" of a class using same... (3 Replies)
hello to all
i want to use multithreading to my UDP broadcast server client program. will anyone help me by proving C code. i am working in fedora. also my requirement is POSIX compliance.please help me..... (0 Replies)
hello to all
i want to use multithreading to my UDP broadcast server client program. will anyone help me by proving C code. i am working in fedora. also my requirement is POSIX compliance.please help me..... (6 Replies)
I take this question of the The Linux Programming Interface: A Linux and Unix System Programming page 652 exercise 30.1
I want someone to explain the under line statement because it sounds complex to me couldn't understand anything
30-1 Modify the program (thread_incr.c) so that each loop in... (3 Replies)
Discussion started by: fwrlfo
3 Replies
LEARN ABOUT CENTOS
malloc_trim
MALLOC_TRIM(3) Linux Programmer's Manual MALLOC_TRIM(3)NAME
malloc_trim - release free memory from the top of the heap
SYNOPSIS
#include <malloc.h>
void malloc_trim(size_t pad);
DESCRIPTION
The malloc_trim() function attempts to release free memory at the top of the heap (by calling sbrk(2) with a suitable argument).
The pad argument specifies the amount of free space to leave untrimmed at the top of the heap. If this argument is 0, only the minimum
amount of memory is maintained at the top of the heap (i.e., one page or less). A nonzero argument can be used to maintain some trailing
space at the top of the heap in order to allow future allocations to be made without having to extend the heap with sbrk(2).
RETURN VALUE
The malloc_trim() function returns 1 if memory was actually released back to the system, or 0 if it was not possible to release any memory.
ERRORS
No errors are defined.
CONFORMING TO
This function is a GNU extension.
NOTES
This function is automatically called by free(3) in certain circumstances; see the discussion of M_TOP_PAD and M_TRIM_THRESHOLD in mal-
lopt(3).
This function cannot release free memory located at places other than the top of the heap.
This function releases only memory in the main arena.
SEE ALSO sbrk(2), malloc(3), mallopt(3)COLOPHON
This page is part of release 3.53 of the Linux man-pages project. A description of the project, and information about reporting bugs, can
be found at http://www.kernel.org/doc/man-pages/.
Linux 2012-03-29 MALLOC_TRIM(3)