getrusage() Post: 302122770

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Operating Systems HP-UX getrusage() Post 302122770 by jim mcnamara on Thursday 21st of June 2007 09:53:39 AM

06-21-2007

Registered User

Code:

#include <stdlib.h>
#include <sys/resource.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>     


void process(struct rusage *p, char *when)
{
	printf("%s\n", when);
	printf(" /* user time used */                   %8d  %8d\n",  p->ru_utime.tv_sec,p->ru_utime.tv_usec   );
	printf(" /* system time used */                 %8d  %8d\n",  p->ru_stime.tv_sec,p->ru_stime.tv_usec   );
	printf(" /* integral shared memory size */      %8d\n",  p->ru_ixrss           );
	printf(" /* integral unshared data  */          %8d\n",  p->ru_idrss           );
	printf(" /* integral unshared stack  */         %8d\n",  p->ru_isrss           );
	printf(" /* page reclaims */                    %8d\n",  p->ru_minflt          );
	printf(" /* page faults */                      %8d\n",  p->ru_majflt          );
	printf(" /* swaps */                            %8d\n",  p->ru_nswap           );
	printf(" /* block input operations */           %8d\n",  p->ru_inblock         );
	printf(" /* block output operations */          %8d\n",  p->ru_oublock         );
	printf(" /* # of characters read/written */     %8d\n",  p->ru_ioch            );
	printf(" /* messages sent */                    %8d\n",  p->ru_msgsnd          );
	printf(" /* messages received */                %8d\n",  p->ru_msgrcv          );
	printf(" /* signals received */                 %8d\n",  p->ru_nsignals        );
	printf(" /* voluntary context switches */       %8d\n",  p->ru_nvcsw           );
	printf(" /* involuntary  */                     %8d\n",  p->ru_nivcsw          );

}


int main()
{
	  int ret;
	  char *buf;
	  int i=0;
	  int who= RUSAGE_SELF;
	  struct rusage usage;
	  struct rusage *p=&usage;

	  ret=getrusage(who,p);
	  process(p, "-------------before");
	  /* do stuff here */
      ret=getrusage(who,p);
	  process(p, "\n\n-------------after we run foo1");    

	return 0;
}

Note getrusage() works only for a process and its children.

jim mcnamara

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getrusage

GETRUSAGE(3)								 1							      GETRUSAGE(3)

getrusage - Gets the current resource usages

SYNOPSIS

       array getrusage ([int  $who])

DESCRIPTION

	This is an interface to getrusage(2). It gets data returned from the system call.

PARAMETERS

	      o $who
		- If $who is 1, getrusage will be called with RUSAGE_CHILDREN.

RETURN VALUES

	Returns an associative array containing the data returned from the system call. All entries are accessible by using their documented field
       names.

EXAMPLES

       Example #1

	      getrusage(3) example

	      <?php
	      $dat = getrusage();
	      echo $dat["ru_nswap"];	     // number of swaps
	      echo $dat["ru_majflt"];	     // number of page faults
	      echo $dat["ru_utime.tv_sec"];  // user time used (seconds)
	      echo $dat["ru_utime.tv_usec"]; // user time used (microseconds)
	      ?>

CHANGELOG

       +--------+---------------------------------------------+
       |Version |					      |
       |	|					      |
       |	|		  Description		      |
       |	|					      |
       +--------+---------------------------------------------+
       | 7.0.0	|					      |
       |	|					      |
       |	|  This function is now supported on Windows. |
       |	|					      |
       +--------+---------------------------------------------+
NOTES

       Note

	       On Windows getrusage(3) will only return the following members:

		     o "ru_stime.tv_sec"

		     o "ru_stime.tv_usec"

		     o "ru_utime.tv_sec"

		     o "ru_utime.tv_usec"

		     o "ru_majflt" (only if $who is RUSAGE_SELF)

		     o "ru_maxrss" (only if $who is RUSAGE_SELF)

	       If getrusage(3) is called with $who set to 1 ( RUSAGE_CHILDREN), then resource usage for threads are collected (meaning that inter-
	      nally the function is called with RUSAGE_THREAD).

       Note

	       on BeOS 2000, only the following members are returned:

		     o "ru_stime.tv_sec"

		     o "ru_stime.tv_usec"

		     o "ru_utime.tv_sec"

		     o "ru_utime.tv_usec"

SEE ALSO

       Your system's man page on getrusage(2).

PHP Documentation Group 													      GETRUSAGE(3)

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getrusage