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Quality of life improvements #14

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Quality of life improvements #14

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41 changes: 29 additions & 12 deletions test-tlb.c
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Original file line number Diff line number Diff line change
Expand Up @@ -13,10 +13,11 @@
#include <signal.h>
#include <math.h>
#include <time.h>
#include <string.h>

#define PAGE_SIZE 4096

#define FREQ 3.9
static double FREQ;

static int test_hugepage = 0;
static int random_list = 0;
Expand Down Expand Up @@ -233,6 +234,15 @@ static void *create_map(void *map, unsigned long size, unsigned long stride)

int main(int argc, char **argv)
{
if (strcmp(argv[1], "help") == 0) {
printf("-H use hugepages\n"
"-r use a random list\n<size> size of data to test\n<stride> amount of bytes"
"between array elements when allocating <size>\n<freq> define the CPU frequency"
"to use during testing\nk M G go after <size> and <stride> to specify kilobytes "
"megabytes or gigabytes\n\neg.\n./test-tlb 10M 10M 2.0\n");
return 0;
}

unsigned long stride, size;
const char *arg;
void *map;
Expand All @@ -244,28 +254,35 @@ int main(int argc, char **argv)
if (*arg != '-')
break;
for (;;) {

switch (*++arg) {
case 0:
break;
case 'H':
test_hugepage = 1;
continue;
case 'r':
random_list = 1;
continue;
default:
die("Unknown flag '%s'", arg);
case 0:
break;
case 'H':
test_hugepage = 1;
continue;
case 'r':
random_list = 1;
continue;
default:
die("Unknown flag '%s'", arg);
}
break;
}
argv++;

}

size = get_num(argv[1]);
stride = get_num(argv[2]);
FREQ = atof(argv[3]);

if (stride < 4 || size < stride)
die("bad arguments: test-tlb [-H] <size> <stride>");
if (FREQ == 0) {
die("Bad arguments: test-tlb [help] [-H] <size> <stride> <freq>");
}

printf("Setting cpu frequency to: %lfghz\n", FREQ);
map = NULL;
cycles = 1e10;
for (int i = 0; i < 5; i++) {
Expand Down