cpuload: add cpulad test case

Signed-off-by: ligd <liguiding1@xiaomi.com>

testing/cpuload/Kconfig

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+#
+# For a description of the syntax of this configuration file,
+# see the file kconfig-language.txt in the NuttX tools repository.
+#
+
+config TESTING_CPULOAD
+	tristate "cpuload test"
+	default n

testing/cpuload/Make.defs

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+############################################################################
+# apps/testing/cpuload/Make.defs
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.  The
+# ASF licenses this file to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance with the
+# License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+# License for the specific language governing permissions and limitations
+# under the License.
+#
+############################################################################
+
+ifneq ($(CONFIG_TESTING_CPULOAD),)
+CONFIGURED_APPS += $(APPDIR)/testing/cpuload
+endif

testing/cpuload/Makefile

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+############################################################################
+# apps/testing/cpuload/Make.defs
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.  The
+# ASF licenses this file to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance with the
+# License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+# License for the specific language governing permissions and limitations
+# under the License.
+#
+############################################################################
+
+include $(APPDIR)/Make.defs
+
+PROGNAME  = cpuload
+PRIORITY  = 100
+STACKSIZE = $(CONFIG_DEFAULT_TASK_STACKSIZE)
+MODULE    = $(CONFIG_TESTING_CPULOAD)
+
+MAINSRC = cpuload_main.c
+
+include $(APPDIR)/Application.mk

testing/cpuload/cpuload_main.c

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+/****************************************************************************
+ * apps/testing/cpuload/cpuload_main.c
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+#include <nuttx/arch.h>
+
+#include <unistd.h>
+#include <pthread.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+#define CPULOAD_US          (USEC_PER_SEC / CONFIG_SCHED_CPULOAD_TICKSPERSEC)
+#define CPULOAD_DELAY       (10 * CPULOAD_US)
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+static void show_usage(FAR const char *progname, int exitcode)
+{
+  optind = 0;
+
+  printf("\nUsage: %s [-c cpu] -p percent\n", progname);
+  printf("\nWhere:\n");
+  printf("  -c bind to specific CPU, don't bind CPU if no this option\n");
+  printf("  -p process percent[1-100], exectime / (exectime + idletime)\n");
+  exit(exitcode);
+}
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * cpuload_main
+ ****************************************************************************/
+
+int main(int argc, FAR char *argv[])
+{
+  FAR char *endptr;
+  int option;
+  int cpu = -1;
+  int per = 50;
+
+  while ((option = getopt(argc, argv, "c:p:")) != ERROR)
+    {
+      if (option == 'c')
+        {
+          cpu = strtol(optarg, &endptr, 10);
+        }
+      else if (option == 'p')
+        {
+          per = strtol(optarg, &endptr, 10);
+        }
+      else
+        {
+          printf("Unrecognized option: '%c'\n", option);
+          show_usage(argv[0], EXIT_FAILURE);
+        }
+    }
+
+  /* There should be two parameters remaining on the command line */
+
+  if (per < 1 || per > 100 || optind > argc)
+    {
+      printf("Missing required arguments\n");
+      show_usage(argv[0], EXIT_FAILURE);
+    }
+
+#ifdef CONFIG_SMP
+  if (cpu > 0 && cpu < CONFIG_SMP_NCPUS)
+    {
+      cpu_set_t cpu_mask;
+
+      CPU_ZERO(&cpu_mask);
+      CPU_SET(cpu, &cpu_mask);
+
+      pthread_setaffinity_np(pthread_self(), sizeof(cpu_set_t), &cpu_mask);
+    }
+#endif
+
+  while (1)
+    {
+      up_udelay(per * CPULOAD_DELAY / 100);
+      usleep((100 - per) * CPULOAD_DELAY / 100);
+    }
+
+  return 0;
+}