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barebox/commands/dhrystone.c

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/*
* (C) Copyright 2014 - 2015 Phytec Messtechnik GmbH
* Author: Stefan Müller-Klieser <s.mueller-klieser@phytec.de>
* Author: Daniel Schultz <d.schultz@phytec.de>
*
* based on "DHRYSTONE" Benchmark Program
* Version: C, Version 2.1
* Date: May 25, 1988
* Author: Reinhold P. Weicker
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation.
*
* 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 for more details.
*
*/
#include <common.h>
#include <command.h>
#include <errno.h>
#include <clock.h>
#include <asm-generic/div64.h>
#include <malloc.h>
#include <stdbool.h>
#include <stdio.h> /* for strcpy, strcmp */
enum idents {ident_1, ident_2, ident_3, ident_4, ident_5};
/* General definitions: */
struct record {
struct record *ptr_comp;
enum idents discr;
union {
struct {
enum idents enum_comp;
int int_comp;
char str_comp[31];
} var_1;
struct {
enum idents enum_comp_2;
char str_2_comp[31];
} var_2;
struct {
char char_1_Comp;
char char_2_Comp;
} var_3;
} variant;
};
/* Global Variables: */
static struct record *record_glob;
static struct record *next_record_glob;
static int int_glob;
static bool bool_glob;
static char char_1_glob;
static char char_2_glob;
static int arr_1_glob[50];
static int arr_2_glob[50][50];
/* Cycle Variables: */
static int int_1;
static int int_2;
static int int_3;
static char char_i;
static enum idents ident;
static char str_1[31];
static char str_2[31];
static int i;
#define TOO_SMALL_TIME (50 * MSECOND)
/* Measurements should last at least 50mseconds */
#define TOO_LARGE_TIME (2 * SECOND)
static enum idents compare_chars(char char_1, char char_2)
{
if (char_1 != char_2)
return ident_1;
char_1_glob = char_1;
return ident_2;
}
static bool compare_strs(char str_1[31], char str_2[31])
{
int offset;
offset = 2;
while (offset <= 2)
if (compare_chars(str_1[offset], str_2[offset+1]) == ident_1)
++offset;
if (strcmp(str_1, str_2) > 0) {
int_glob = offset + 7;
return true;
}
return false;
}
static bool check_ident(enum idents ident)
{
if (ident == ident_3)
return true;
return false;
}
static void proc_7(int input_1, int input_2, int *out)
{
*out = input_2 + input_1 + 2;
}
static void proc_6(enum idents ident, enum idents *ident_out)
{
*ident_out = ident;
if (!check_ident(ident))
*ident_out = ident_4;
switch (ident) {
case ident_1:
*ident_out = ident_1;
break;
case ident_2:
if (int_glob > 100)
*ident_out = ident_1;
else
*ident_out = ident_4;
break;
case ident_3:
*ident_out = ident_2;
break;
case ident_4:
break;
case ident_5:
*ident_out = ident_3;
break;
}
}
static void fill_record(struct record *record)
{
struct record *next_record = record->ptr_comp;
*record->ptr_comp = *record_glob;
record->variant.var_1.int_comp = 5;
next_record->variant.var_1.int_comp = record->variant.var_1.int_comp;
next_record->ptr_comp = record->ptr_comp;
proc_7(10, int_glob, &record_glob->variant.var_1.int_comp);
/* Ptr_Val_Par->ptr_comp->ptr_comp == record_glob->ptr_comp */
if (next_record->discr == ident_1) { /* then, executed */
next_record->variant.var_1.int_comp = 6;
proc_6(record->variant.var_1.enum_comp,
&next_record->variant.var_1.enum_comp);
next_record->ptr_comp = record_glob->ptr_comp;
proc_7(next_record->variant.var_1.int_comp, 10,
&next_record->variant.var_1.int_comp);
} else { /* not executed */
*record = *record->ptr_comp;
}
}
static void proc_2(int *out)
{
if (char_1_glob == 'A')
*out = *out + 9 - int_glob;
}
static void proc_4(void)
{
bool_glob = (char_1_glob == 'A') | bool_glob;
char_2_glob = 'B';
}
static void proc_5(void)
{
char_1_glob = 'A';
bool_glob = false;
}
/* dhry_2.c */
static void fill_array(int arr_1[50], int arr_2[50][50], int val_1, int val_2)
{
int i;
int offset;
offset = val_1 + 5;
arr_1[offset] = val_2;
arr_1[offset+1] = arr_1[offset];
arr_1[offset+30] = offset;
for (i = offset; i <= offset+1; ++i)
arr_2[offset][i] = offset;
arr_2[offset][offset-1] += 1;
arr_2[offset+20][offset] = arr_1[offset];
int_glob = 5;
}
static void one_dhrystone_cycle(void)
{
proc_5();
proc_4();
/* char_1_glob == 'A', char_2_glob == 'B', bool_glob == true */
int_1 = 2;
int_2 = 3;
strcpy(str_2, "DHRYSTONE PROGRAM, 2'ND STRING");
ident = ident_2;
bool_glob = !compare_strs(str_1, str_2);
/* bool_glob == 1 */
while (int_1 < int_2) {
int_3 = 5 * int_1 - int_2;
/* int_3 == 7 */
proc_7(int_1, int_2, &int_3);
/* int_3 == 7 */
int_1 += 1;
}
/* int_1 == 3, int_2 == 3, int_3 == 7 */
fill_array(arr_1_glob, arr_2_glob, int_1, int_3);
/* int_glob == 5 */
fill_record(record_glob);
for (char_i = 'A'; char_i <= char_2_glob; ++char_i) {
if (ident == compare_chars(char_i, 'C')) {
proc_6(ident_1, &ident);
strcpy(str_2,
"DHRYSTONE PROGRAM, 3'RD STRING");
int_2 = i;
int_glob = i;
}
}
/* int_1 == 3, int_2 == 3, int_3 == 7 */
int_2 = int_2 * int_1;
int_1 = int_2 / int_3;
int_2 = 7 * (int_2 - int_3) - int_1;
/* int_1 == 1, int_2 == 13, int_3 == 7 */
proc_2(&int_1);
/* int_1 == 5 */
}
static int do_dhrystone(int argc, char *argv[])
{
int number_of_runs;
int actually_number_of_runs = 0;
/* variables for time measurement */
u64 begin_time;
u64 end_time;
u64 user_time;
u64 nanoseconds;
/* barebox cmd */
if (argc == 2) {
number_of_runs = simple_strtoul(argv[1], NULL, 10);
if (number_of_runs == 0)
number_of_runs = 1;
} else {
number_of_runs = 10000;
}
/* Initializations */
next_record_glob = xmalloc(sizeof(*next_record_glob));
record_glob = xmalloc(sizeof(*record_glob));
printf("\n");
printf("Dhrystone Benchmark, Version 2.1 (Language: C)\n");
printf("\n");
printf("Program compiled without 'register' attribute\n");
printf("\n");
ident = ident_2; /* prevent compiler warning */
int_2 = 0; /* prevent compiler warning */
int_3 = 0; /* prevent compiler warning */
record_glob->ptr_comp = next_record_glob;
record_glob->discr = ident_1;
record_glob->variant.var_1.enum_comp = ident_3;
record_glob->variant.var_1.int_comp = 40;
strcpy(record_glob->variant.var_1.str_comp,
"DHRYSTONE PROGRAM, SOME STRING");
strcpy(str_1, "DHRYSTONE PROGRAM, 1'ST STRING");
arr_2_glob[8][7] = 10;
/* Was missing in published program. Without this statement, */
/* arr_2_glob [8][7] would have an undefined value. */
/* Warning: With 16-Bit processors and number_of_runs > 32000, */
/* overflow may occur for this array element. */
/***************/
/* Start timer */
/***************/
begin_time = get_time_ns();
again:
for (i = 0; i < number_of_runs; i++)
one_dhrystone_cycle();
actually_number_of_runs += number_of_runs;
end_time = get_time_ns();
user_time = end_time - begin_time;
if (user_time < TOO_SMALL_TIME)
goto again;
printf("Execution finished with %d runs through Dhrystone\n",
actually_number_of_runs);
printf("\n");
printf("Failed variables:\n");
if (int_glob != 5) {
printf("int_glob: %d\n", int_glob);
printf(" should be: %d\n", 5);
}
if (bool_glob != 1) {
printf("bool_glob: %d\n", bool_glob);
printf(" should be: %d\n", 1);
}
if (char_1_glob != 'A') {
printf("char_1_glob: %c\n", char_1_glob);
printf(" should be: %c\n", 'A');
}
if (char_2_glob != 'B') {
printf("char_2_glob: %c\n", char_2_glob);
printf(" should be: %c\n", 'B');
}
if (arr_1_glob[8] != 7) {
printf("arr_1_glob[8]: %d\n", arr_1_glob[8]);
printf(" should be: %d\n", 7);
}
if (arr_2_glob[8][7] != (actually_number_of_runs + 10)) {
printf("arr_2_glob[8][7]: %d\n", arr_2_glob[8][7]);
printf(" should be: %d\n",
actually_number_of_runs + 10);
}
if (record_glob->ptr_comp != next_record_glob) {
printf("record_glob->ptr_comp: 0x%p\n",
record_glob->ptr_comp);
printf(" should be: 0x%p\n", next_record_glob);
}
if (record_glob->discr != 0) {
printf("record_glob->discr: %d\n", record_glob->discr);
printf(" should be: %d\n", 0);
}
if (record_glob->variant.var_1.enum_comp != 2) {
printf("record_glob->enum_comp: %d\n",
record_glob->variant.var_1.enum_comp);
printf(" should be: %d\n", 2);
}
if (record_glob->variant.var_1.int_comp != 17) {
printf("record_glob->int_comp: %d\n",
record_glob->variant.var_1.int_comp);
printf(" should be: %d\n", 17);
}
if (strcmp(record_glob->variant.var_1.str_comp,
"DHRYSTONE PROGRAM, SOME STRING") != 0) {
printf("record_glob->str_comp: %s\n",
record_glob->variant.var_1.str_comp);
printf(" should be: DHRYSTONE PROGRAM, SOME STRING\n");
}
if (next_record_glob->ptr_comp != next_record_glob) {
printf("next_record_glob->ptr_comp: 0x%p\n",
next_record_glob->ptr_comp);
printf(" should be: 0x%p\n",
next_record_glob);
}
if (next_record_glob->discr != 0) {
printf(" next_record_glob->discr: %d\n",
next_record_glob->discr);
printf(" should be: %d\n", 0);
}
if (next_record_glob->variant.var_1.enum_comp != 1) {
printf("next_record_glob->enum_comp: %d\n",
next_record_glob->variant.var_1.enum_comp);
printf(" should be: %d\n", 1);
}
if (next_record_glob->variant.var_1.int_comp != 18) {
printf("next_record_glob->int_comp: %d\n",
next_record_glob->variant.var_1.int_comp);
printf(" should be: %d\n", 18);
}
if (strcmp(next_record_glob->variant.var_1.str_comp,
"DHRYSTONE PROGRAM, SOME STRING") != 0) {
printf("next_record_glob->str_comp: %s\n",
next_record_glob->variant.var_1.str_comp);
printf(" should be: DHRYSTONE PROGRAM, SOME STRING\n");
}
if (int_1 != 5) {
printf("int_1: %d\n", int_1);
printf(" should be: %d\n", 5);
}
if (int_2 != 13) {
printf("int_2: %d\n", int_2);
printf(" should be: %d\n", 13);
}
if (int_3 != 7) {
printf("int_3: %d\n", int_3);
printf(" should be: %d\n", 7);
}
if (ident != 1) {
printf("ident: %d\n", ident);
printf(" should be: %d\n", 1);
}
if (strcmp(str_1, "DHRYSTONE PROGRAM, 1'ST STRING") != 0) {
printf("str_1: %s\n", str_1);
printf(" should be: DHRYSTONE PROGRAM, 1'ST STRING\n");
}
if (strcmp(str_2, "DHRYSTONE PROGRAM, 2'ND STRING") != 0) {
printf("str_2: %s\n", str_2);
printf(" should be: DHRYSTONE PROGRAM, 2'ND STRING\n");
}
printf("\n");
if (user_time > TOO_LARGE_TIME)
printf("Measured time too large to obtain meaningful results or a timer wrap happend.\n");
else if (end_time < begin_time)
printf("Timer overflow occured.\n");
printf("user_time: %llu ns\n", user_time);
nanoseconds = user_time;
do_div(nanoseconds, actually_number_of_runs);
printf("Nanoseconds for one run through Dhrystone: %llu\n",
nanoseconds);
printf("Dhrystones per Second:\n ");
printf("(%d / %llu) * 10^9\n", actually_number_of_runs, user_time);
printf("DMIPS:\n ");
printf("((%d / %llu) * 10^9) / 1757\n", actually_number_of_runs,
user_time);
printf("\n");
return 0;
}
BAREBOX_CMD_HELP_START(dhrystone)
BAREBOX_CMD_HELP_TEXT("Run dhrystone benchmark to get an estimation of the CPU freq")
BAREBOX_CMD_HELP_END
BAREBOX_CMD_START(dhrystone)
.cmd = do_dhrystone,
BAREBOX_CMD_DESC("run dhrystone test, specify number of runs")
BAREBOX_CMD_OPTS("[number_of_runs]")
BAREBOX_CMD_GROUP(CMD_GRP_INFO)
BAREBOX_CMD_HELP(cmd_dhrystone_help)
BAREBOX_CMD_END
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