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Old 06-08-2004, 06:39 AM   #1
t_sunil_kumar
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Registered: Jun 2004
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how to get "load average" using a program


Hi friends,

My system is Red hat linux 6.2, kernel 2.2.14. Through a C program, I want to get the "load average" that is shown by "top" command in its first line (load average: 0.19, 0.36, 0.41)

Please help me if any system call is available to get this.

Regards,
-Sunil
 
Old 06-08-2004, 10:43 AM   #2
Technoslave
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cat /proc/loadavg
 
Old 06-08-2004, 10:51 AM   #3
Hko
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Registered: Aug 2002
Location: Groningen, The Netherlands
Distribution: Debian
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..and in C that would be something like:
Code:
#include <stdio.h>

#define LEN 14

int main()
{
	 FILE *fp;
	 char str[LEN+1];

	 if ((fp = fopen("/proc/loadavg", "r")) == NULL) {
		  perror("");
		  return 1;
	 }
	 if (fread(str, 1, LEN, fp) != LEN) {
		  fprintf(stderr, "Error reading loadavg\n");
		  return 2;
	 }
	 str[LEN] = '\0';
	 printf("load average: %s\n", str);
	 return 0;
}
 
  


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