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new 8cb7dd069 apps/testing: Add pthread_mutex_perf created by Anchao
8cb7dd069 is described below
commit 8cb7dd0694dfd759eb4508352a00f62a78df68d9
Author: Alan Carvalho de Assis <[email protected]>
AuthorDate: Tue Dec 16 15:59:55 2025 -0300
apps/testing: Add pthread_mutex_perf created by Anchao
During the discussion about the impact of adding counter to TCB
Mr anchao created a pthread mutex performance example:
https://github.com/apache/nuttx/pull/17468#issuecomment-3660925314
Because this example can exercise (not ideally) the pthread mutex
I decided to add it to apps/testing/sched, the program name will
be called "pmutexp" (because "pmp" is not a good name).
Signed-off-by: Alan C. Assis <[email protected]>
---
testing/sched/pthread_mutex_perf/CMakeLists.txt | 41 ++++++
testing/sched/pthread_mutex_perf/Kconfig | 30 +++++
testing/sched/pthread_mutex_perf/Make.defs | 25 ++++
testing/sched/pthread_mutex_perf/Makefile | 32 +++++
.../sched/pthread_mutex_perf/pthread_mutex_perf.c | 145 +++++++++++++++++++++
5 files changed, 273 insertions(+)
diff --git a/testing/sched/pthread_mutex_perf/CMakeLists.txt
b/testing/sched/pthread_mutex_perf/CMakeLists.txt
new file mode 100644
index 000000000..a7ac6ad92
--- /dev/null
+++ b/testing/sched/pthread_mutex_perf/CMakeLists.txt
@@ -0,0 +1,41 @@
+#
##############################################################################
+# apps/testing/sched/pthread_mutex_perf/CMakeLists.txt
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+# 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.
+#
+#
##############################################################################
+
+if(CONFIG_TESTING_PTHREAD_MUTEX_PERF)
+
+ set(SRCS pthread_mutex_perf.c)
+
+ nuttx_add_application(
+ NAME
+ ${CONFIG_TESTING_PTHREAD_MUTEX_PERF_PROGNMAE}
+ PRIORITY
+ ${CONFIG_TESTING_PTHREAD_MUTEX_PERF_PRIORITY}
+ STACKSIZE
+ ${CONFIG_TESTING_PTHREAD_MUTEX_PERF_STACKSIZE}
+ MODULE
+ ${CONFIG_TESTING_PTHREAD_MUTEX_PERF}
+ COMPILE_FLAGS
+ ${FLAGS}
+ SRCS
+ ${SRCS})
+
+endif()
diff --git a/testing/sched/pthread_mutex_perf/Kconfig
b/testing/sched/pthread_mutex_perf/Kconfig
new file mode 100644
index 000000000..d8f188880
--- /dev/null
+++ b/testing/sched/pthread_mutex_perf/Kconfig
@@ -0,0 +1,30 @@
+#
+# For a description of the syntax of this configuration file,
+# see the file kconfig-language.txt in the NuttX tools repository.
+#
+
+config TESTING_PTHREAD_MUTEX_PERF
+ bool "Pthread Mutex Performance (pmutexp) testing"
+ default n
+ ---help---
+ Pthread Mutex Performance (pmp) helps to analyze the pthread
+ mutex performance, by calling the function many times.
+
+if TESTING_PTHREAD_MUTEX_PERF
+
+config TESTING_PTHREAD_MUTEX_PERF_PROGNAME
+ string "Program name"
+ default "pmutexp"
+ ---help---
+ This is the name of the program that will be used when the NSH
ELF
+ program is installed.
+
+config TESTING_PTHREAD_MUTEX_PERF_PRIORITY
+ int "Priority of pmutexp process"
+ default 100
+
+config TESTING_PTHREAD_MUTEX_PERF_STACKSIZE
+ int "Stack size of pmutexp process"
+ default DEFAULT_TASK_STACKSIZE
+
+endif
diff --git a/testing/sched/pthread_mutex_perf/Make.defs
b/testing/sched/pthread_mutex_perf/Make.defs
new file mode 100644
index 000000000..7242f2043
--- /dev/null
+++ b/testing/sched/pthread_mutex_perf/Make.defs
@@ -0,0 +1,25 @@
+############################################################################
+# apps/testing/sched/pthread_mutex_perf/Make.defs
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+# 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_PTHREAD_MUTEX_PERF),)
+CONFIGURED_APPS += $(APPDIR)/testing/sched/pthread_mutex_perf
+endif
diff --git a/testing/sched/pthread_mutex_perf/Makefile
b/testing/sched/pthread_mutex_perf/Makefile
new file mode 100644
index 000000000..8b9b114a0
--- /dev/null
+++ b/testing/sched/pthread_mutex_perf/Makefile
@@ -0,0 +1,32 @@
+############################################################################
+# apps/testing/sched/pthread_mutex_perf/Makefile
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+# 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 = $(CONFIG_TESTING_PTHREAD_MUTEX_PERF_PROGNAME)
+PRIORITY = $(CONFIG_TESTING_PTHREAD_MUTEX_PERF_PRIORITY)
+STACKSIZE = $(CONFIG_TESTING_PTHREAD_MUTEX_PERF_STACKSIZE)
+MODULE = $(CONFIG_TESTING_PTHREAD_MUTEX_PERF)
+
+MAINSRC = pthread_mutex_perf.c
+
+include $(APPDIR)/Application.mk
diff --git a/testing/sched/pthread_mutex_perf/pthread_mutex_perf.c
b/testing/sched/pthread_mutex_perf/pthread_mutex_perf.c
new file mode 100644
index 000000000..f958f0fcb
--- /dev/null
+++ b/testing/sched/pthread_mutex_perf/pthread_mutex_perf.c
@@ -0,0 +1,145 @@
+/****************************************************************************
+ * apps/testing/sched/pthread_mutex_perf/pthread_mutex_perf.c
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * 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 <stdio.h>
+#include <pthread.h>
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+pthread_mutex_t g_mutex = PTHREAD_MUTEX_INITIALIZER;
+
+static void timespec_diff(const struct timespec *start,
+ const struct timespec *end,
+ struct timespec *diff)
+{
+ diff->tv_sec = end->tv_sec - start->tv_sec;
+ diff->tv_nsec = end->tv_nsec - start->tv_nsec;
+
+ if (diff->tv_nsec < 0)
+ {
+ diff->tv_sec--;
+ diff->tv_nsec += 1000000000;
+ }
+}
+
+static void timespec_add(struct timespec *total, const struct timespec *diff)
+{
+ total->tv_sec += diff->tv_sec;
+ total->tv_nsec += diff->tv_nsec;
+
+ if (total->tv_nsec >= 1000000000)
+ {
+ total->tv_sec += total->tv_nsec / 1000000000;
+ total->tv_nsec = total->tv_nsec % 1000000000;
+ }
+}
+
+static void timespec_avg(const struct timespec *total, int count,
+ struct timespec *avg)
+{
+ uint64_t total_ns = (uint64_t)total->tv_sec * 1000000000 + total->tv_nsec;
+ uint64_t avg_ns = total_ns / count;
+
+ avg->tv_sec = avg_ns / 1000000000;
+ avg->tv_nsec = avg_ns % 1000000000;
+}
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * pmp_main
+ ****************************************************************************/
+
+int main(int argc, char *argv[])
+{
+ struct timespec start;
+ struct timespec end;
+ struct timespec diff;
+ struct timespec total = {
+ 0, 0
+ };
+
+ struct timespec avg;
+ int i;
+ int j = 0;
+ const int loop_count = 10;
+
+ while (j < loop_count)
+ {
+ i = 0;
+ j++;
+
+ /* Get the starting time */
+
+ clock_gettime(CLOCK_BOOTTIME, &start);
+
+ /* Do 1 million interactions trying to lock an already locked mutex */
+
+ pthread_mutex_lock(&g_mutex);
+
+ while (i < 1000 * 1000)
+ {
+ i++;
+ pthread_mutex_trylock(&g_mutex);
+ }
+
+ pthread_mutex_unlock(&g_mutex);
+
+ /* Get the finished time */
+
+ clock_gettime(CLOCK_BOOTTIME, &end);
+
+ /* Get the calculated elapsed time */
+
+ timespec_diff(&start, &end, &diff);
+
+ /* Add it to total time for each loop pass */
+
+ timespec_add(&total, &diff);
+
+ /* Get the average time */
+
+ timespec_avg(&total, j, &avg);
+
+ printf("%d: diff = %lu.%09lu s | avg = %lu.%09lu s\n", j,
+ (unsigned long)diff.tv_sec, (unsigned long)diff.tv_nsec,
+ (unsigned long)avg.tv_sec, (unsigned long)avg.tv_nsec);
+ }
+
+ printf("\n===== result =====\n");
+ printf("count: %d\n", loop_count);
+ printf("total: %lu.%09lu s\n", (unsigned long)total.tv_sec,
+ (unsigned long)total.tv_nsec);
+ printf("avg: %lu.%09lu s\n", (unsigned long)avg.tv_sec,
+ (unsigned long)avg.tv_nsec);
+
+ return 0;
+}
