/*
   Copyright (C) 2003-2006 MySQL AB
    All rights reserved. Use is subject to license terms.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License, version 2.0,
   as published by the Free Software Foundation.

   This program is also distributed with certain software (including
   but not limited to OpenSSL) that is licensed under separate terms,
   as designated in a particular file or component or in included license
   documentation.  The authors of MySQL hereby grant you an additional
   permission to link the program and your derivative works with the
   separately licensed software that they have included with MySQL.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License, version 2.0, for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
*/



#include <ndb_global.h>

long long getMilli();
long long getMicro();
void malloctest(int loopcount, int memsize, int touch);
void freetest(int loopcount, int memsize);
void mmaptest(int loopcount, int memsize, int touch);
void unmaptest(int loopcount, int memsize);


main(int argc, char ** argv)
{

  int loopcount;
  int memsize;
  if(argc < 4) {
    printf("Usage:  memtest X loopcount memsize(MB)\n");
    printf("where X = \n");
    printf("1 : malloc test \n");
    printf("2 : mmap test \n");
    printf("3 : malloc test + touch pages\n");
    printf("4 : mmap test + touch pages\n");
    printf("5 : malloc/free test \n");
    printf("6 : mmap/munmap test \n");
    printf("loopcount - number of loops\n");
    printf("memsize - memory segment size to allocate in MB.\n");
    exit(1);
  }
  

  loopcount = atoi(argv[2]);
  memsize = atoi(argv[3]);
  switch(atoi(argv[1])) {
  case 1: malloctest(loopcount, memsize , 0 );
    break;
  case 2: mmaptest(loopcount, memsize,0);
    break;
  case 3: malloctest(loopcount, memsize,1);
    break;
  case 4: mmaptest(loopcount, memsize,1);
    break;
  case 5: freetest(loopcount, memsize);
    break;
  case 6: unmaptest(loopcount, memsize);
    break;
  default:
    break;
  }
}
  
long long getMilli() {
  struct timeval tick_time;
  gettimeofday(&tick_time, 0);

  return 
    ((long long)tick_time.tv_sec)  * ((long long)1000) +
    ((long long)tick_time.tv_usec) / ((long long)1000);
}

long long getMicro(){
  struct timeval tick_time;
  int res = gettimeofday(&tick_time, 0);

  long long secs   = tick_time.tv_sec;
  long long micros = tick_time.tv_usec;
  
  micros = secs*1000000+micros;
  return micros;
}

void malloctest(int loopcount, int memsize, int touch) {
  long long start=0;
  int total=0;
  int i=0, j=0;
  int size=memsize*1024*1024; /*bytes*/;
  float mean;
  char * ptr =0;
  
  printf("Staring malloctest ");
  if(touch)
    printf("with touch\n");
  else
    printf("\n");
  
  start=getMicro();
  
  for(i=0; i<loopcount; i++){
    ptr=(char *)malloc((size_t)(size));
    if(ptr==0) {
      printf("failed to malloc!\n");
      return;
    }    
    if(touch) {
      for(j=0; j<size; j=j+4096)
	ptr[j]=1;
    }
  }
  total=(int)(getMicro()-start);
  
  mean=(float)((float)total/(float)loopcount);
  printf("Total time malloc %d bytes: %2.3f microsecs  loopcount %d touch %d \n",
	 size, mean,loopcount, touch);  
}


void mmaptest(int loopcount, int memsize, int touch) {
  long long start=0;
  int total=0;
  int i=0, j=0;
  char * ptr;
  int size=memsize*1024*1024; /*bytes*/;
  float mean;

  printf("Staring mmaptest ");
  if(touch)
    printf("with touch \n");
  else
    printf("\n");

  start=getMicro();  
  for(i=0; i<loopcount; i++){
    ptr = mmap(0, 
	       size, 
	       PROT_READ|PROT_WRITE, 
	       MAP_PRIVATE|MAP_ANONYMOUS, 
	       0,
	       0);
    if(ptr<0) {
      printf("failed to mmap!\n");
      return;
    }

    if(touch) {
      for(j=0; j<size; j=j+4096)
	ptr[j]=1;
    }  
  }
  total=(int)(getMicro()-start);
  mean=(float)((float)total/(float)loopcount);
  printf("Total time mmap %d bytes: %2.3f microsecs  \n",size, mean);  
}


void unmaptest(loopcount, memsize) 
{
  long long start=0;
  int total=0;
  int i=0, j=0;
  char * ptr;
  int size=memsize*1024*1024; /*bytes*/;
  float mean;

  printf("Staring munmap test (loopcount = 1 no matter what you prev. set)\n");

  loopcount = 1;


  for(i=0; i<loopcount; i++){
    ptr =(char*) mmap(0, 
		      size, 
		      PROT_READ|PROT_WRITE, 
		      MAP_PRIVATE|MAP_ANONYMOUS, 
		      0,
		      0);
    if(ptr<0) {
      printf("failed to mmap!\n");
      return;
    }


    for(j=0; j<size; j=j+1)
      ptr[j]='1';
    start=getMicro(); 
    if(munmap(ptr, size)<0) {
      printf("failed to munmap!\n");
      return;
    }
   
    total=(int)(getMicro()-start);
    /*
    for(j=8192; j<size; j=j+4096) {

	*(ptr+j)='1';
    }
    
    for(j=0; j<4096; j=j+4096) { 
      *(ptr+j)='1';
    }
    
    */
  }
  mean=(float)((float)total/(float)loopcount);
  printf("Total time unmap %d bytes: %2.3f microsecs  \n",size, mean);  
}

void freetest(int loopcount, int memsize) {
  long long start=0;
  int total=0;
  int i=0, j=0;
  int size=memsize*1024*1024; /*bytes*/;
  float mean;
  char * ptr =0;

  loopcount = 1;
  printf("Staring free test (loopcount = 1 no matter what you prev. set)\n");

  
  for(i=0; i<loopcount; i++){
    ptr=(char*)malloc((size_t)(size));
    if(ptr==0) {
      printf("failed to malloc!\n");
      return;
    }
    for(j=0; j<size; j=j+4096)
      ptr[j]='1';
    start=getMicro();     
    free(ptr);
    total=(int)(getMicro()-start);
  }

  
  mean=(float)((float)total/(float)loopcount);
  printf("Total time free %d bytes: %2.3f microsecs  loopcount %d \n",
	 size, mean,loopcount);  
}
