02-01-2004
scheduling a process
hi there i m having a confusion here with the looping in this example below. can someone help me out!?
#include<stdio.h>
main()
{
char it = 'a';
char stop = 'z';
int x,ret;
for(; it<'f';it++)
{
// for(x=0; x<32000;x++)
write(1,&it,1);
}
x=fork();
if(x);
{
it='F'; stop = 'Z';
}
write(1,&it,1);
write(1,&stop,1);
for(; it<=stop;it++)
{
for(x=0;x<32000;x++);
write(1,&it,1);
}
}
=======================
heres my output
: abcdeFZFGHIJKLMNOPQRSTUVWXYZFZFGHIJKLMNOPQRSTUVWXYZ
for this example i have, the text says it is an example of "sheduling of a process". i can't really sort out why does it say so?
can someone tell me whats the difference between having
for(; it<'f';it++)
{
for(x=0; x<32000;x++)
write(1,&it,1);
}
and
for(; it<'f';it++)
{
for(x=0; x<32000;x++); //i don't get this part!
write(1,&it,1); //how does write work
}
also a similar question
if(x);
{
any code
}
and
if(x)
{
any code
}
Thank you
10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
Hello,
I would like to schedule a command at a specific time on my system.I know that theres a file named at.alow and at.deny in my system. I can find the at.deny file but not an at.allow file .
Is there anyway out or i have to go and talk to the system administrator itself , or any other way of... (1 Reply)
Discussion started by: prashantuc
1 Replies
2. UNIX for Dummies Questions & Answers
i have tried to schedule my process at a certain time using the at command :
the error says bad time specification
can somebody help me
i used at 2300 job
thanks (2 Replies)
Discussion started by: prashantuc
2 Replies
3. UNIX for Advanced & Expert Users
Hello
How to know the scheduling policy of the process in
HP-UX. (1 Reply)
Discussion started by: manjunath
1 Replies
4. Shell Programming and Scripting
Hi forum,
I have a problem concerning job or process scheduling and control.
I have to run 24 jobs (could be more sometimes less) of the same programme with different parameters. The machine this code is running on is an 8-core machine, so I was thinking that running all the processes at once... (0 Replies)
Discussion started by: deiphon
0 Replies
5. AIX
Hi all!
Some dumb administrator run the weekly backup "by hand" on our AIX 5.3 server, which we use to deploy Websphere applications, during work hours. Using the server while the backup is taking place is almost imposible. Both the disks are working at 100% and it's almost unusable. Asking the... (2 Replies)
Discussion started by: shandrio
2 Replies
6. Shell Programming and Scripting
Hi all,
My OS is Solaris 10. I want to schedule a job which i need to run between morining 6 to eve 6 once for every 2 hours. This is what i did.
0 6-18 * * 1-5 /monitor.sh
It runs for every hour how to make it for every two hours ......
Thanks,
Firestar. (1 Reply)
Discussion started by: firestar
1 Replies
7. UNIX for Dummies Questions & Answers
Hello, i'm absolutely new to the whole Operating Systems thing. I am pretty much level 0.
My assignment is to "simulate the execution of a stream of processes by a computer system, one CPU, many terminals 12 disk drives, 30 public mailboxes.
The professor runs a series of inputs which is a... (1 Reply)
Discussion started by: JaneSkylar
1 Replies
8. Shell Programming and Scripting
Hi,
i have 10 sh scripts. All are running in parallel using cron tab and each script gives "success" flag files once the execution is completed.
and, now i have 11th script which should look for "success" flag from those 10 sh scripts. once all the 10 flag files found, 11 th script has to do... (9 Replies)
Discussion started by: nago123
9 Replies
9. UNIX for Dummies Questions & Answers
Hello All,
I have three requirements to schedule three shell scripts in crontab.
Could you please help me in this:
1) To schedule a shell script every 5mins interval every day between 10PM to 10:30PM
2) To schedule a shell script every 10min interval every day between 9AM to 10AM.
3) To... (6 Replies)
Discussion started by: abhi_123
6 Replies
10. Shell Programming and Scripting
I want to extract the process having highest utilization on each processor core
and then output its information (PID etc.) to a file. How can I do it by using either top or ps command?
Thanks. (1 Reply)
Discussion started by: Vaibhavs1985
1 Replies
LEARN ABOUT CENTOS
papi_reset
PAPI_reset(3) PAPI PAPI_reset(3)
NAME
PAPI_reset -
Reset the hardware event counts in an event set.
SYNOPSIS
Detailed Description
@par C Prototype:
int PAPI_reset( int EventSet );
@param EventSet
an integer handle for a PAPI event set as created by PAPI_create_eventset
@retval PAPI_OK
@retval PAPI_ESYS
A system or C library call failed inside PAPI, see the errno variable.
@retval PAPI_ENOEVST
The EventSet specified does not exist.
PAPI_reset() zeroes the values of the counters contained in EventSet.
This call assumes an initialized PAPI library and a properly added event set
@par Example:
int EventSet = PAPI_NULL;
int Events[] = {PAPI_TOT_INS, PAPI_FP_OPS};
int ret;
// Create an empty EventSet
ret = PAPI_create_eventset(&EventSet);
if (ret != PAPI_OK) handle_error(ret);
// Add two events to our EventSet
ret = PAPI_add_events(EventSet, Events, 2);
if (ret != PAPI_OK) handle_error(ret);
// Start counting
ret = PAPI_start(EventSet);
if (ret != PAPI_OK) handle_error(ret);
// Stop counting, ignore values
ret = PAPI_stop(EventSet, NULL);
if (ret != PAPI_OK) handle_error(ret);
// reset the counters in this EventSet
ret = PAPI_reset(EventSet);
if (ret != PAPI_OK) handle_error(ret);
*
See Also:
PAPI_create_eventset
Author
Generated automatically by Doxygen for PAPI from the source code.
Version 5.2.0.0 Tue Jun 17 2014 PAPI_reset(3)