[PATCH v4] commands: Add dhrystone
Daniel Schultz
d.schultz at phytec.de
Mon Aug 3 05:41:11 PDT 2015
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 at phytec.de>
---
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 at phytec.de>
+ * Author: Daniel Schultz <d.schultz at 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(
+"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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