09-09-2008
Hi ,
Mostly the diffrence is in execution time.threads require less time to execute,whereas the execution speed is more with processes.
you can get the user space/system space time using getrusage() function call.
By comparing the execution time you can decide between threads & processes.
But one more thing with threads you have to deal with synchronization.
best luck.
Raj
10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
For a project we need to make sure that all php / html files in a certain directory on the webserver are showing advertisments of us.
For example, when you get a website from Lycos, you'll have an advertisement in the right corner.
How to?
As far as I can see, Lycos includes a javascript... (1 Reply)
Discussion started by: valentijnb
1 Replies
2. Shell Programming and Scripting
Hi Friends!!
I have obtained following output from a tool called pdftoxml:
<xml>
<text top="423" left="521" width="333" height="20" font="3">Although the the number of fuzzy rules of a system is </text>
<text top="441" left="500" width="355" height="20" font="3">directly dependant on these... (2 Replies)
Discussion started by: parshant_bvcoe
2 Replies
3. Shell Programming and Scripting
Hi all.
I do have a script "startApp.sh" (app result is a file /opt/extract/appextract.txt)
I have no problems with stopping app
var1=`ps -ef | grep -v grep | grep MyApp | awk '{print $2}'`
kill -9 $var1
What I want to achieve is:
I start app, app is doing some extraction, after... (11 Replies)
Discussion started by: e-l-diablo
11 Replies
4. Shell Programming and Scripting
I have a file which will have rows like shown below,
ST*820*316054716
RMR*IV*11333331009*PO*40.31
REF*IV*22234441009*xsss471-2762
DTM*003*091016
ENT*000006
RMR*IV*2222234444*PO*239.91
REF*IV*1234445451009*LJhjlkhkj471-2762 </SPAN>
DTM*003*
091016
RMR*IV*2223344441009*PO*40.31... (18 Replies)
Discussion started by: Muthuraj K
18 Replies
5. Shell Programming and Scripting
Hello All,
My script is nearly complete, there is just one last piece that needs to be added in.
I need to check for the time, and if it is lets say for example. Sunday at 5:00AM, my script cannot run.
I would assume it would be something like this, parden the terrible pseudocode
... (7 Replies)
Discussion started by: jeffs42885
7 Replies
6. Shell Programming and Scripting
Hi all,
I have to run C++ file using root programming, using following commands:
$root -l
root .L TwoTrees.C++
root TwoTrees t
root t.Loop()
root.q
I wonder if I can write script to do the following.
Thanks
Pooja (12 Replies)
Discussion started by: nrjrasaxena
12 Replies
7. Shell Programming and Scripting
i am stuck with this strange problem..... maybe you can help.
i have one master_file which has two column username and id_number separated by , somewhat like :
cat master_file :
sample,1234567
javacode,4567891
companion,23456719
adamsandler,1237681
tomcruise,56328910
bradpitt,901236781... (9 Replies)
Discussion started by: mukulverma2408
9 Replies
8. UNIX for Dummies Questions & Answers
Below is the sample logfile:
Userids Date Time
acb Checkout time: 2013-11-20 17:00
axy Checkout time: 2013-11-22 12:00
der Checkout time: 2013-11-17 17:00
xyz Checkout time: 2013-11-19 16:00
ddd Checkout time: 2013-11-21 16:00
aaa Checkout... (9 Replies)
Discussion started by: asjaiswal
9 Replies
9. Shell Programming and Scripting
I want to do FTP an Huge XML file to mainframe server using AIX server
Since my file size is huge, i want to split the XML file based on a delimiter , the record delimiter should be set after every 27000 bytes of data
and then do the ftp
This is done becos the data send to the mainframe must... (1 Reply)
Discussion started by: vishwanath001
1 Replies
10. Programming
Hi,
I am working in Visual studio 2008 in which i have written the code in c++,qml,qt.Its a simulator application.
I would like to create a simulator with certain changes. In order to do that i have modified the code with few changes based on the preprocessor condition.
#define... (4 Replies)
Discussion started by: SA_Palani
4 Replies
FORK(2) BSD System Calls Manual FORK(2)
NAME
fork -- create a new process
SYNOPSIS
#include <unistd.h>
pid_t
fork(void);
DESCRIPTION
fork() causes creation of a new process. The new process (child process) is an exact copy of the calling process (parent process) except for
the following:
o The child process has a unique process ID.
o The child process has a different parent process ID (i.e., the process ID of the parent process).
o The child process has its own copy of the parent's descriptors. These descriptors reference the same underlying objects, so that,
for instance, file pointers in file objects are shared between the child and the parent, so that an lseek(2) on a descriptor in the
child process can affect a subsequent read or write by the parent. This descriptor copying is also used by the shell to establish
standard input and output for newly created processes as well as to set up pipes.
o The child processes resource utilizations are set to 0; see setrlimit(2).
RETURN VALUES
Upon successful completion, fork() returns a value of 0 to the child process and returns the process ID of the child process to the parent
process. Otherwise, a value of -1 is returned to the parent process, no child process is created, and the global variable errno is set to
indicate the error.
ERRORS
fork() will fail and no child process will be created if:
[EAGAIN] The system-imposed limit on the total number of processes under execution would be exceeded. This limit is configuration-
dependent.
[EAGAIN] The system-imposed limit MAXUPRC (<sys/param.h>) on the total number of processes under execution by a single user would
be exceeded.
[ENOMEM] There is insufficient swap space for the new process.
LEGACY SYNOPSIS
#include <sys/types.h>
#include <unistd.h>
The include file <sys/types.h> is necessary.
SEE ALSO
execve(2), sigaction(2), wait(2), compat(5)
HISTORY
A fork() function call appeared in Version 6 AT&T UNIX.
CAVEATS
There are limits to what you can do in the child process. To be totally safe you should restrict yourself to only executing async-signal
safe operations until such time as one of the exec functions is called. All APIs, including global data symbols, in any framework or library
should be assumed to be unsafe after a fork() unless explicitly documented to be safe or async-signal safe. If you need to use these frame-
works in the child process, you must exec. In this situation it is reasonable to exec yourself.
4th Berkeley Distribution June 4, 1993 4th Berkeley Distribution