|
|
Sponsored Content
Top Forums
Programming
Stress testing memory using malloc in linux ??
Post 302380076 by frozensmilz on Monday 14th of December 2009 06:19:13 AM
12-14-2009
Stress testing memory using malloc in linux ??
Hi to all,
Recently i am testing an equipment that runs in i586 fedora linux. I have to test mmap function. For that i determined to fill the memory and run the required application to check whether it throws any mmap error regarding low resources.
This is the line that does the allocation.
p = (long double *) malloc(BUFFSIZE);
In windows process explorer i have noticed that what ever value we give it to BUFFSIZE it will increase the size of "Private Bytes" but not working set memory or actual memory. In linux the memory still remains the same even after allocating about 1000MB. So the system remains stable. The "memset" package is not available and cannot be installed, also there is no swap memory. The equipment runs in its own ram which is about 500MB.
I am looking for a C program to fill the memory and crash the system. Kindly help.
BASIL B.C.
Recently i am testing an equipment that runs in i586 fedora linux. I have to test mmap function. For that i determined to fill the memory and run the required application to check whether it throws any mmap error regarding low resources.
This is the line that does the allocation.
p = (long double *) malloc(BUFFSIZE);
In windows process explorer i have noticed that what ever value we give it to BUFFSIZE it will increase the size of "Private Bytes" but not working set memory or actual memory. In linux the memory still remains the same even after allocating about 1000MB. So the system remains stable. The "memset" package is not available and cannot be installed, also there is no swap memory. The equipment runs in its own ram which is about 500MB.
I am looking for a C program to fill the memory and crash the system. Kindly help.
BASIL B.C.
|
|
10 More Discussions You Might Find Interesting
1. Programming
When allocating memory for two different nodes, the resulting memory are the same. Clearly, this will lead to a mistake. This happened in a function. And the process must be in a function.
(gdb) p tree->list
$43 = (node *) 0x8be4180
(gdb) p tree->list
$44 = (node *) 0x8be4180
At the... (2 Replies)
Discussion started by: cdbug
2 Replies
2. Solaris
Hi All,
Is there way to stress memory on Solaris 10? If yes, how do I monitor the memory usage? (3 Replies)
Discussion started by: samnyc
3 Replies
3. UNIX and Linux Applications
I'm looking for a script or some other application that will use up a lot of memory on a Solaris or Linux server, in order to test a monitoring application. So far I have found a script that's good for CPU usage but it does nothing for memory. I have also tried the application called 'stress'... (0 Replies)
Discussion started by: Kraas
0 Replies
4. Programming
Actually for a process to run it needs text, stack , heap and data segments. All these find a place in the physical memory.
Out of these 4 only heap does exist after the termination of the process that created it. I want to know the exact reason why this happens. Also why the other process need to... (20 Replies)
Discussion started by: karthiktceit
20 Replies
5. Programming
In a 'C' program,when I am trying to allocate memory with the help of malloc () function, it is allocating the memory up to a certain limit for e.g. in my case, it is 670 MB (approx). malloc() returns NULL if I allocate more than this amount of memory.When I tried
to allocate memory in chunks of... (1 Reply)
Discussion started by: vipinsachan
1 Replies
6. Shell Programming and Scripting
Hi,
Your great help is very appreciated. I am looking for any Unix command or tool for doing Stress/Load test of php files at command prompt.
I tried torture.pl but it is not working after20 concurrent threads/users.
as it is very urgent for me..please suggest ur ideas asap.
thanks (5 Replies)
Discussion started by: Malleswari
5 Replies
7. Programming
Hi All,
I have a simple code which does some computation by matching string patterns.
In brief:
1. The code reads .dat and .txt files.
2. .dat files are huge text files and .txt files contain some important words.
3. I am just doing strstr to find the patterns.
4. The function returns the... (3 Replies)
Discussion started by: shoaibjameel123
3 Replies
8. Programming
I am using libxml2 library for XMl parsing and libxml++ is C++ wrapper over that. So I am using API of libxml++. I am creating my class and composing instance xmlpp::Node *pNode in that. my class also have funciton prepareXPathQuery() which creates query string and have other fucntion... (2 Replies)
Discussion started by: sharadwagh
2 Replies
9. Programming
I am facing a problem of memory corruption. The loop runs for the first time but does not go through the second time. What could be the problem?
for(int z=0;z<2;z++)
{
fp=fopen("poly.dat","r");
/*do something which reads this file into a 2D array*/
fclose(fp);
... (10 Replies)
Discussion started by: dare
10 Replies
10. UNIX for Beginners Questions & Answers
Hi all, bit of a forum newb here, so apologies if this has been covered else where, but I wonder if any of you has any experience with stress testing servers, specifically using 3rd party services. We run a very busy production system, and just haven't been able to simulate the user activity while... (1 Reply)
Discussion started by: dare99
1 Replies
LEARN ABOUT CENTOS
ipcmk
IPCMK(1) User Commands IPCMK(1) NAME
ipcmk - create various ipc resources SYNOPSIS
ipcmk <resource options> [additional options] DESCRIPTION
ipcmk allows you to create shared memory segments, message queues or semaphore arrays. RESOURCE OPTIONS
Resources may be specified as follows: -M, --shmem [size] Shared memory segment of size bytes. -S, --semaphore [number] Semaphore array with number of elements. -Q, --queue Message queue. ADDITIONAL OPTIONS
-p, --mode [mode] Permission for the resource. Default is 0644. -h, --help Display a short help message and exit. -V, --version Output version information and exit. SEE ALSO
ipcrm(1), ipcs(1) AUTHOR
Hayden A. James <hayden.james@gmail.com> AVAILABILITY
The ipcmk command is part of the util-linux package and is available from Linux Kernel Archive <ftp://ftp.kernel.org/pub/linux/utils/util- linux/>. util-linux September 2011 IPCMK(1)