This tool will help to measure the system performance.
Some SoCs haven't the possibility to route their clocks to the output pins.
So you can use dhrystone to get a feedback about the clock speed.
Signed-off-by: Daniel Schultz <d.schultz@xxxxxxxxx>
---
Changes:
v1:
applied RFC suggestions:
-removed 'default n' in Kconfig
-refactored time defines with default time units
-only print variable values when values are wrong
-added units to printf
-the iteration parameter is now optional. The programm starts
with 10000 iterations and adjust higher, when execution time
is too short.
-changed variable name (microseconds -> nanoseconds)
-corrected the command description
v2:
refactored globale variables
changed malloc calls
v3:
moved benchmark execution in a new function
build a wrapper around this function to adjust the iterations better
v4:
refactored adjust logic
changed functions to static
commands/Kconfig | 6 +
commands/Makefile | 1 +
commands/dhrystone.c | 445 +++++++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 452 insertions(+)
create mode 100644 commands/dhrystone.c
diff --git a/commands/Kconfig b/commands/Kconfig
index bb6674e..30485c0 100644
--- a/commands/Kconfig
+++ b/commands/Kconfig
@@ -2102,6 +2102,12 @@ config CMD_STATE
depends on STATE
prompt "state"
+config CMD_DHRYSTONE
+ bool
+ prompt "dhrystone"
+ help
+ CPU benchmark tool
+
# end Miscellaneous commands
endmenu
diff --git a/commands/Makefile b/commands/Makefile
index 3698347..879caec 100644
--- a/commands/Makefile
+++ b/commands/Makefile
@@ -112,3 +112,4 @@ obj-$(CONFIG_CMD_NV) += nv.o
obj-$(CONFIG_CMD_DEFAULTENV) += defaultenv.o
obj-$(CONFIG_CMD_STATE) += state.o
obj-$(CONFIG_CMD_DHCP) += dhcp.o
+obj-$(CONFIG_CMD_DHRYSTONE) += dhrystone.o
diff --git a/commands/dhrystone.c b/commands/dhrystone.c
new file mode 100644
index 0000000..203acce
--- /dev/null
+++ b/commands/dhrystone.c
@@ -0,0 +1,445 @@
+/*
+ * (C) Copyright 2014 - 2015 Phytec Messtechnik GmbH
+ * Author: Stefan Müller-Klieser <s.mueller-klieser@xxxxxxxxx>
+ * Author: Daniel Schultz <d.schultz@xxxxxxxxx>
+ *
+ * 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(
+"this command runs the 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
--
1.9.1
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