8 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
Is it possible to display the clock (timing) on the screen all the time. (3 Replies)
Discussion started by: vino.paal
3 Replies
2. Programming
#include<iostream>
#include<time.h>
using namespace std;
int main()
{
system("date");
clock_t start = clock();
int i=9*8;
while(i--)
{
int j=9999999;
while(j--);
}
clock_t end = clock();
double elapsed =... (4 Replies)
Discussion started by: johnbach
4 Replies
3. Solaris
Hi there!!!
Need your help in solving some tricky problems.
Since clock() as such is buggy on SUN OS 5 we have started using gettimeofday() in our RTOS applications based on Solaris 9.
The problems we actually encountered previously were - the applications kind of freeze/hang eternally on... (1 Reply)
Discussion started by: smanu
1 Replies
4. UNIX for Advanced & Expert Users
Hi
We had a AIX box built last year but was set to the correct GMT time, but using DST time zone. In march this year the clocks went forward without issues. (if I remember a couple of weeks early due to the DST zone)
This year we decided to change the clock to the correct time zone before... (0 Replies)
Discussion started by: markab2
0 Replies
5. UNIX for Dummies Questions & Answers
Hi,
Is there a chance that the clock() call returns 0 eternally???
Using BSD. My RTOS application freezes inconsistently only on particular hosts. When debugging it, I came to see that the RTOS timer does not tick at times. The underlying system call is clock() & it always returns zero when the... (4 Replies)
Discussion started by: smanu
4 Replies
6. Programming
Hey all,
i need a program to get the CPU ticks at certain points of my program. So, i thought about using the clock function, but i'm having a hard time figuring out how it really works. I wrote this simple program to try to understand it but it made me feel more confused:
#include <stdio.h>... (5 Replies)
Discussion started by: kastrup_carioca
5 Replies
7. UNIX Desktop Questions & Answers
Guys could you please tell me which appropriate command is used to set hardware (BIOS) clock so that the system keeps time when it reboots & how it's used. I use Linux
Thank you (2 Replies)
Discussion started by: joseph kembo
2 Replies
8. UNIX for Dummies Questions & Answers
Hey ppl, i was wonddering, in mandrake, how to get the clok to display the time in non-military format....hehe thank you im just tired of looking at 18:00 hehe thank you (2 Replies)
Discussion started by: LolapaloL
2 Replies
clock(3C) Standard C Library Functions clock(3C)
NAME
clock - report CPU time used
SYNOPSIS
#include <time.h>
clock_t clock(void);
DESCRIPTION
The clock() function returns the amount of CPU time (in microseconds) used since the first call to clock() in the calling process. The time
reported is the sum of the user and system times of the calling process and its terminated child processes for which it has executed the
wait(3C) function, the pclose(3C) function, or the system(3C) function.
RETURN VALUES
Dividing the value returned by clock() by the constant CLOCKS_PER_SEC, defined in the <time.h> header, will give the time in seconds. If
the process time used is not available or cannot be represented, clock returns the value (clock_t) -1.
USAGE
The value returned by clock() is defined in microseconds for compatibility with systems that have CPU clocks with much higher resolution.
Because of this, the value returned will wrap around after accumulating only 2147 seconds of CPU time (about 36 minutes).
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Interface Stability |Standard |
+-----------------------------+-----------------------------+
|MT-Level |MT-Safe |
+-----------------------------+-----------------------------+
SEE ALSO
times(2), popen(3C), system(3C), wait(3C), attributes(5), standards(5)
SunOS 5.10 24 Jul 2002 clock(3C)
