High CPU Utilization in Random Pin Generation

Question

Hi Team,

 

We have an application for Random Pin Generation. As per business requirement, we have to support 12 concurrent user transactions at a time. Where in each user will attempt to generate 1 lakh Pins during each transaction. During this activity, application server's CPU utilization reached maximum limit.

 

We identified, random number generation task is what consuming maximum system resources ( 70 %). please advise where we need betterment to fix this issue? Should we need to find solution in IIS side or Application level? 

 

 System Configuration

 

1. 16 GB RAM

2. OCTA Core Processor

3. IIS 7.0 

4. Development Environment ( Visual Studio 4.0) 

 

 

 Code

 

List<string> lstpins = null;

lstpins = new List<string>();

for (int i = 1; i <= qty; )

{

double dlRnd = rnFirst.NextDouble();//with seed

if (dlRnd < 0.0001)

{

dlRnd += 0.012;

}

string strRndFirstDgt = dlRnd.ToString().Substring(2, iFirstPinLng);

//----Second Rnd ------ 0.6 91979 52919 26617

double dlSecondRnd = rnSecond.NextDouble(); //Without Seed. 58535 03461 123

if (dlSecondRnd < 0.0001)

{

dlSecondRnd += 0.012;

}

string strRndSecondLastsixDgt = dlSecondRnd.ToString().Substring(dlSecondRnd.ToString().Length - iSecondPinLng, iSecondPinLng);

string conCan = strRndFirstDgt + strRndSecondLastsixDgt;

long temp;

temp = Convert.ToInt64(conCan) + DateTime.Now.Ticks; //addition to pin+ datetime Ticks

int intRndThird = rnThird.Next(1, 10);//To avoid the prefix value 0's;

string conCanRnd = intRndThird.ToString() + (temp.ToString().Substring(temp.ToString().Length - pinLength, pinLength - 1));

string sessionconcatpins = stInt + conCanRnd.ToString(); // Append Concurent User Hit Count in to PINS

if (!string.IsNullOrEmpty(sessionconcatpins.Trim()))

{

if (!lstpins.Contains(sessionconcatpins))

{

lstpins.Add(sessionconcatpins);

i++;

}

}

if (i % 100 == 0)

{

lngDateTicker = DateTime.Now.Ticks;

strSeedLastNineDgt = lngDateTicker.ToString().Substring(7, 9);

rnFirst = new Random(Convert.ToInt32(strSeedLastNineDgt));

}

}

Thread.Sleep(100);

return lstpins;