I'm studing the system call. I've written a small program that return the time spent in doing some operations. Now I'd like to write one that return the time spent in user mode of a process.
I'm reading that i should use the tms struct:
But It's not very clear pratically. Surfing on the net I've found just hard examples.
Can anyone help with a small example that show how can i use the times function?
Dear Friends,
I write a c program to list the directories recursively. For this I write a function called my_readdir to read the content of directory. For this I use read system call it returns -1, then I use readdir system call it gives comment terminated error or segmentation... (1 Reply)
Hi,
Ho do I differentiate system call from library call?
for example if I am using chmod , how do I find out if it is a system call or library call?
Thanks
Muru (2 Replies)
I have a cgi script which is called after certain time interval, which has this:
system ("ls -l /tmp/cgic* | grep -v \"cgicsave.env\" | awk '{print $5}'");
During the execution of this script,the output is 0 sometimes. But due to this the system call is not working at all and doesnt o/p... (2 Replies)
hi everyone
i wrote a system call and compiled the kernel succesfully...
my system call is in a file in the kernel folder named my_syscall1.c (kernel/my_syscall1.c)
the header file for this system call i added it in the folder include like this include/my_syscall1/my_syscall1.h
my problem is... (2 Replies)
Trying to figure out a load issue with a webserver. I have traced a php script and noticed the following
connect(4, {sa_family=AF_INET, sin_port=htons(3306), sin_addr=inet_addr("XX.XX.XX.XX")}, 16) = -1 EINPROGRESS (Operation now in progress) <0.000035>
poll(, 1, 2000) = 1 () <0.000120>... (5 Replies)
Hi again ;) Now I want to make a program that will execute the programs with exec, asking the user if he wants the program to run in background or foreground.
scanf("%c",&caracter);
if (caracter=='y'){
printf("Has decidido ejecutarlo en background\n");
if((pid=fork())==0) {// fork para... (3 Replies)
newPerm = oldPerm & ~0100;
where oldPerm holds the value of st_mode from the system call stat().
When I try and compile every line where ive attempted to do these operations gives the warning "parameter names without declaration types in function declaration". what could be the problem? the... (2 Replies)
Discussion started by: bjhum33
2 Replies
LEARN ABOUT MINIX
times
TIMES(2) System Calls Manual TIMES(2)NAME
times - get process times
SYNOPSIS
#include <sys/types.h>
#include <sys/times.h>
#include <time.h>
int times(struct tms *buffer)
DESCRIPTION
Times returns time-accounting information for the current process and for the terminated child processes of the current process. All times
are in 1/CLOCKS_PER_SEC seconds.
This is the structure returned by times:
struct tms {
clock_t tms_utime; /* user time for this process */
clock_t tms_stime; /* system time for this process */
clock_t tms_cutime; /* children's user time */
clock_t tms_cstime; /* children's system time */
};
The user time is the number of clock ticks used by a process on its own computations. The system time is the number of clock ticks spent
inside the kernel on behalf of a process. This does not include time spent waiting for I/O to happen, only actual CPU instruction times.
The children times are the sum of the children's process times and their children's times.
RETURN
Times returns 0 on success, otherwise -1 with the error code stored into the global variable errno.
ERRORS
The following error code may be set in errno:
[EFAULT] The address specified by the buffer parameter is not in a valid part of the process address space.
SEE ALSO time(1), wait(2), time(2).
4th Berkeley Distribution May 9, 1985 TIMES(2)