test_memspeed.c

This a framework to test new ideas in transmission technology. Actual development is a LDPC-coder in

/***************************************************************************
             memspeed.c  -  RTLinux kernel module for testing memory-speed
                            -------------------
    begin                :  2002
    authors              :  Linus Gasser
    emails               :  [e-mail]
 ***************************************************************************/

/***************************************************************************
                                 Changes
                                 -------
 date - name - description
2002-10-02 - ineiti - begin
 
 
 **************************************************************************/

/***************************************************************************
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 ***************************************************************************/


/**
 * Debugging priorities
 *
 * LVL 0 : Error messages only
 * LVL 1 : Important status messages
 * LVL 2 : Not too much traffic
 * LVL 3 : A bit more detailed
 * LVL 4 : S P A M - all we can do
 *
 * This way you can increase or decreas the level of debugging
 * messages depending on what you're doing.
 */

#define DBG_LVL 4

#include "system.h"
#include "debugging.h"
#include "memory.h"
#include "connection.h"
#include "sdb.h"


void *test_it( void *arg ) {
  void *data;
  int i, tb, te;

  tb = get_time_usec();
  for ( i=0; i<1000000; i++ ) {
    data = swr_malloc( 8 );
    swr_free( data );
  }
  te = get_time_usec();
  PR_DBG( 0, "Total time for 1e6 mallocs/free: %ius\n", te - tb );
  return 0;
}

/**
 * This function is called upon loading of the module
 */

pthread_t thread;

int swr_memspeed_init(void) {
  if ( pthread_create( &thread, 0, test_it, 0) < 0 ) {
    PR_DBG( 0, "Failed to create test_it thread\n");
    return 1;
  }
  PR_DBG( 0, "memspeed initialised\n" );
  return 0;
}



/**
 * This function is called when the module is unloaded.
 */

void swr_memspeed_cleanup(void) {
  PR_DBG( 0, "memspeed cleaned up\n" );
  pthread_join( thread, NULL );
  pthread_cancel( thread );
  swr_memory_show();
}


/**
 * Kernel macros which define the initialization and finalization
 * function.
 */

module_init(swr_memspeed_init);
module_exit(swr_memspeed_cleanup);