how to calculate overall network load and cpu performance of a client?
 

hi all,
i wrote a script which sends the server,files from /proc/ like dev,netstat,loadavg etc of a client. i want to calculate the network load and the overall cpu performance of the client using the information from the files.I donot know how to calculate that as i have too many values in those. Can anyone please tell me which values will be useful and how to calculate??

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thanks for the links. i used Top for getting cpu info, memory , network load etc..but i need a formula to calculate the overall performance of a system considering all the above values.i dont know how to generate such a formula, as each of the above fields are different from each other. i have pasted my code below. pls help.

#include<stdio.h>
#include<ctype.h>
void main( void )
{
int i,j,flag=0;
float num1,num2,no1,no2;
char line[128]="/0",out[120]="/0",out1[120]="/0",out2[120]="/0",out3[120]="/0",out4[120]="/0",out5[120]="/0";
char s,avg1[10];
system("top -n 1 -b > output.txt"); //Execution of 'top' function to retreive the files.
static const char filename[] = "/home/teena/Main_project/output.txt";
FILE *file = fopen ( filename, "r" );
if ( file != NULL )
{
while(s!=EOF)
{
if(flag==0) //To retrieve the load average value.
{
line[0]=s;
i=1;
do
{
line[i]=fgetc(file);
i++;
}while( (line[i-1]!=' ')&&(line[i-1]!='\n'));
if((line[0]=='a')&&(line[1]=='v')&&(line[2]=='e')&&(line[3]=='r')&&(line[4]=='a')&&(line[5]=='g')&&(line[6]=='e')&&(line[7]==':'))
{
flag=1;
i=0;
while((s=fgetc(file))!=',')
{
out[i]=s;
i++;
}
}
no1 = (((out[0]-48)*1)+((out[2]-48)*0.1)+((out[3]-48)*0.01));
}
if(flag==1) //To retreive the total number of tasks.
{
line[0]=s;
i=1;
do
{
line[i]=fgetc(file);
i++;
}while( (line[i-1]!=' ')&&(line[i-1]!='\n'));
if((line[0]=='T')&&(line[1]=='a')&&(line[2]=='s')&&(line[3]=='k')&&(line[4]=='s')&&(line[5]==':'))
{
flag=2;
i=0;
while((s=fgetc(file))!='t')
{
out1[i]=s;
i++;
}
j=i-1;
}

}
if(flag==2) //To retrieve the total number of running tasks.
{
line[0]=s;
i=1;
j=0;
do
{
line[i]=fgetc(file);
if(isdigit(line[i]))
{
flag=3;
out2[j]=line[i];
j++;
}
i++;
}while((line[i-1])!='r');
out2[j]='\0';
}
if(flag==3) //To calculate the current total CPU Utilisation.
{
line[0]=s;
i=1;
j=0;
do
{
line[i]=fgetc(file);
i++;
}while((line[i-1])!='(');
do
{
line[i]=fgetc(file);
i++;
}while((line[i-1])!='n');
do
{
line[i]=fgetc(file);
if((isdigit(line[i]))||(line[i]=='.'))
{
flag=4;
out3[j]=line[i];
j++;
}
i++;
}while((line[i-1])!='%');
out3[j]='\0';
num1 = (((out3[0]-48)*10)+((out3[1]-48)*1)+((out3[3]-48)*0.1));
num2 =(100-num1);
}
if(flag==4) //To retrieve the total amount of RAM available.
{
line[0]=s;
i=1;
j=0;
do
{
line[i]=fgetc(file);
i++;
}while((line[i-1])!=':');
do
{
line[i]=fgetc(file);
if(isdigit(line[i]))
{
flag=5;
out4[j]=line[i];
j++;
}
i++;
}while((line[i-1])!='t');
out4[j]='\0';
}
if(flag==5) //To retrieve the amount of used RAM.
{
line[0]=s;
i=1;
j=0;
do
{
line[i]=fgetc(file);
if(isdigit(line[i]))
{
flag=6;
out5[j]=line[i];
j++;
}
i++;
}while((line[i-1])!='u');
out5[j]='\0';
}
s=fgetc(file);
}
//printf("%c",out);
printf("\n\nProcesses running averaged over the last 1 minute: %f\n\n",no1);
printf("Total no. of tasks given to the system: %s\n\n",out1);
printf("Total no. of currently running tasks: %s\n\n",out2);
printf("Current Total CPU Utilisation: %f %\n\n",num2);
printf("Total RAM memory: %sk\n\n",out4);
printf("Used RAM memory: %sk\n\n",out5);
fclose ( file );
}
return 0;
}