Changeset 7130754 in mainline

Timestamp:

2024-01-03T16:48:56Z (4 months ago)

Author:

Jiří Zárevúcky <zarevucky.jiri@…>

Branches:

master, topic/simplify-dev-export

Children:

de96d3b

Parents:

550ed86

git-author:

Jiří Zárevúcky <zarevucky.jiri@…> (2024-01-01 21:28:44)

git-committer:

Jiří Zárevúcky <zarevucky.jiri@…> (2024-01-03 16:48:56)

Message:

Add printbench command for benchmarking print output

File:

• kernel/generic/src/console/cmd.c (modified) (3 diffs)

kernel/generic/src/console/cmd.c

@@ -229 +229 @@
 };
 
+/* Data and methods for 'printbench' command. */
+static int cmd_printbench(cmd_arg_t *argv);
+
+static cmd_info_t printbench_info = {
+        .name = "printbench",
+        .description = "Run a printing benchmark.",
+        .func = cmd_printbench,
+        .argc = 0,
+};
+
 #endif /* CONFIG_TEST */
 
@@ -613 +623 @@
         &test_info,
         &bench_info,
+        &printbench_info,
 #endif
 #ifdef CONFIG_UDEBUG
@@ -1582 +1593 @@
 }
 
+int cmd_printbench(cmd_arg_t *argv)
+{
+        int cnt = 20;
+
+        uint64_t *data = malloc(sizeof(uint64_t) * cnt);
+        if (data == NULL) {
+                printf("Error allocating memory for statistics\n");
+                return false;
+        }
+
+        for (int i = 0; i < cnt; i++) {
+                /*
+                 * Update and read thread accounting
+                 * for benchmarking
+                 */
+                irq_spinlock_lock(&TASK->lock, true);
+                uint64_t ucycles0, kcycles0;
+                task_get_accounting(TASK, &ucycles0, &kcycles0);
+                irq_spinlock_unlock(&TASK->lock, true);
+
+                /* Execute the test */
+                for (int j = 0; j < 20; j++) {
+                        printf("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789ěščřžýáíéú!@#$%%^&*(){}+\n");
+                        printf("ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789ěščřžýáíéú!@#$%%^&*(){}+abcdefghijklmnopqrstuvwxyz\n");
+                        printf("0123456789ěščřžýáíéú!@#$%%^&*(){}+abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ\n");
+                }
+
+                /* Update and read thread accounting */
+                irq_spinlock_lock(&TASK->lock, true);
+                uint64_t ucycles1, kcycles1;
+                task_get_accounting(TASK, &ucycles1, &kcycles1);
+                irq_spinlock_unlock(&TASK->lock, true);
+
+                data[i] = ucycles1 - ucycles0 + kcycles1 - kcycles0;
+        }
+
+        printf("\n");
+
+        uint64_t cycles;
+        char suffix;
+        uint64_t sum = 0;
+
+        for (int i = 0; i < cnt; i++) {
+                sum += data[i];
+        }
+
+        order_suffix(sum / (uint64_t) cnt, &cycles, &suffix);
+        printf("Average\t\t%" PRIu64 "%c\n", cycles, suffix);
+
+        free(data);
+
+        return true;
+}
+
 #endif