mirror of
https://github.com/gigablast/open-source-search-engine.git
synced 2024-10-04 12:17:35 +03:00
65 lines
1.7 KiB
C++
65 lines
1.7 KiB
C++
//#include "gb-include.h"
|
|
#include <malloc.h>
|
|
#include <sys/time.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
|
|
int main ( ) {
|
|
|
|
int32_t bufSize = 100*1024*1024;
|
|
// test random memory accesses
|
|
char *buf = (char *)malloc(bufSize);
|
|
if ( ! buf ) {
|
|
fprintf(stderr,"could not malloc 100MB.\n");
|
|
exit(-1);
|
|
}
|
|
int32_t np = 400000;
|
|
char *ptrs[np];
|
|
for ( int32_t i = 0 ; i < np ; i++ )
|
|
ptrs[i] = buf + (rand() % (bufSize-4));
|
|
// access it
|
|
struct timeval tv;
|
|
gettimeofday ( &tv , NULL );
|
|
int64_t now=(int64_t)(tv.tv_usec/1000)+((int64_t)tv.tv_sec)*1000;
|
|
char c; //int32_t c; // char c;
|
|
int32_t loops = 1;
|
|
for ( int32_t k = 0 ; k < loops ; k++ )
|
|
for ( int32_t i = 0 ; i < np ; i++ )
|
|
//c = *(int32_t *)ptrs[i];
|
|
c = *ptrs[i];
|
|
gettimeofday ( &tv , NULL );
|
|
int64_t now2=(int64_t)(tv.tv_usec/1000)+((int64_t)tv.tv_sec)*1000;
|
|
|
|
fprintf(stderr,"did %"INT32" accesss in %"INT64" ms.\n",loops*np,now2-now);
|
|
fprintf(stderr,"did %"INT64" accesss per second.\n",
|
|
(1000LL*(((int64_t)loops)*((int64_t)np)))/(now2-now));
|
|
return 0;
|
|
|
|
loop:
|
|
int32_t sizes[10000];
|
|
int32_t end = 0;
|
|
|
|
for ( int32_t i = 0 ; i < 10000 ; i++ ) {
|
|
sizes[i] = rand() % 1000;
|
|
//fprintf(stderr,"i=%"INT32"\n",i);
|
|
//ptrs[i] = (char *)mmalloc ( sizes[i] ,NULL );
|
|
ptrs[i] = (char *)malloc ( sizes[i] );
|
|
if ( ! ptrs[i] ) {
|
|
fprintf(stderr,"failed on #%"INT32"",i);
|
|
goto freeThem;
|
|
}
|
|
end = i;
|
|
//fprintf(stderr,"ptr=%"INT32"\n",(int32_t)ptrs[i]);
|
|
}
|
|
|
|
freeThem:
|
|
// now free all
|
|
for ( int32_t i = 0 ; i < end ; i++ ) {
|
|
// for ( int32_t i = 99 ; i >= 0 ; i-- ) {
|
|
//fprintf(stderr,"fi=%"INT32"\n",i);
|
|
//mfree ( ptrs[i] , sizes[i] , NULL );
|
|
free ( ptrs[i] );
|
|
}
|
|
//goto loop;
|
|
}
|