calibrate_crunch.cc

/*
 * Copyright 2003 Michael A. Marsh, Cornell University. All rights reserved.
 * This software is released under the modified BSD license.
 * See the file LICENSE in the top-level directory for details.
 */
//
// $Id: calibrate_crunch.cc,v 1.3 2004/05/19 15:56:46 mmarsh Exp $
//
// $Log: calibrate_crunch.cc,v $
// Revision 1.3  2004/05/19 15:56:46  mmarsh
// *** empty log message ***
//
// Revision 1.2  2003/11/04 22:07:35  mmarsh
// General code cleanup and reorganization.
//
//

#include <unistd.h>
#include <signal.h>
#include <iostream>
#include <iomanip>
#include <sys/resource.h>
#include <sys/time.h>
#include <openssl/ssl.h>
#include <openssl/rand.h>

using namespace std;

int main( int argc, char** argv )
{
   //============================================================
   // Seed the random number generator.
   //============================================================
   unsigned char seed[40] = 
   {0x38,0x4F,0x67,0x4C,0xA6,0x02,0x3D,0x9E,
    0x69, 0x2c, 0x3f, 0xfd, 0x98, 0x50, 0xcc,
    0x76, 0xfa, 0x78, 0x34, 0x12, 0x23, 0xdf,
    0x8a, 0xd4, 0x34, 0xcd, 0x98, 0x59, 0x19,
    0x35, 0x4f, 0xda, 0xed, 0x4e, 0x99, 0x0f};
   RAND_seed(seed,40);


   //============================================================
   // Load SSLeay algorithms
   //============================================================
   SSL_load_error_strings();
   SSLeay_add_ssl_algorithms();

   for ( int i = 0 ; i < 100 ; ++i )
   {
      // initial time
      struct rusage ru1;
      struct timeval tv1;
      getrusage(RUSAGE_SELF,&ru1);
      gettimeofday(&tv1,0);

      // CPU-intensive task
      const unsigned int kNumBits = 512;
      BIGNUM * p = BN_new();
      if ( 0 == p )
      {
         throw __LINE__;
      }
      if ( 0 == BN_generate_prime( p, kNumBits, 1, 0, 0, 0, 0 ) )
      {
         throw __LINE__;
      }
      BN_clear_free(p);

      // ending time
      struct rusage ru2;
      struct timeval tv2;
      getrusage(RUSAGE_SELF,&ru2);
      gettimeofday(&tv2,0);

      // print statistics
      long int rt =
         ( ru2.ru_utime.tv_sec  - ru1.ru_utime.tv_sec  ) * 1000000 +
         ( ru2.ru_utime.tv_usec - ru1.ru_utime.tv_usec );
      long int t =
         ( tv2.tv_sec - tv1.tv_sec ) * 1000000 + ( tv2.tv_usec - tv1.tv_usec );
      cout << rt << " " << t << endl;
   }
}

---