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nuttx-apps/testing/ostest/prioinherit.c
qinwei1 c86509be4c apps: getpid should return process id not thread id 
Summary:
   following the change in the nuttx kernel, implement the right semantics:
1. getpid should return the main thread id
2. gettid should return the current thread id

Refer:
 https://github.com/apache/incubator-nuttx/issues/2499
 https://github.com/apache/incubator-nuttx/pull/2518

Nuttx Kernel PR:
 https://github.com/apache/incubator-nuttx/pull/7597

update apps code

Testing PASSED with qemu( 32/64 )

Signed-off-by: qinwei1 <qinwei1@xiaomi.com>
2022-11-17 17:58:45 +08:00

747 lines
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/****************************************************************************
* apps/testing/ostest/prioinherit.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 <stdio.h>
#include <unistd.h>
#include <semaphore.h>
#include <stdlib.h>
#include <pthread.h>
#include <errno.h>
#ifdef CONFIG_ARCH_SIM
# include <nuttx/arch.h>
#endif
#include <sys/wait.h>
#include "ostest.h"
#if defined(CONFIG_PRIORITY_INHERITANCE) && !defined(CONFIG_DISABLE_PTHREAD)
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
#ifndef CONFIG_SEM_PREALLOCHOLDERS
# define CONFIG_SEM_PREALLOCHOLDERS 0
#endif
/* If resources were configured for lots of holders, then run 3 low priority
* threads. Otherwise, just one.
*/
#if CONFIG_SEM_PREALLOCHOLDERS > 3
# define NLOWPRI_THREADS 3
#else
# define NLOWPRI_THREADS 1
#endif
#define NHIGHPRI_THREADS 1
#define NUMBER_OF_COMPETING_THREADS 3
#define COMPETING_THREAD_START_PRIORITY 200
#define PRIORIY_SPREED 10
/****************************************************************************
* Private Data
****************************************************************************/
/****************************************************************************
* Private Functions
****************************************************************************/
enum thstate_e
{
NOTSTARTED = 0,
RUNNING,
WAITING,
DONE
};
static sem_t g_sem;
static volatile enum thstate_e g_middlestate;
static volatile enum thstate_e g_highstate[NHIGHPRI_THREADS];
static volatile enum thstate_e g_lowstate[NLOWPRI_THREADS];
static volatile int g_priority_tracking[NUMBER_OF_COMPETING_THREADS];
static int g_highpri;
static int g_medpri;
static int g_lowpri;
/****************************************************************************
* Name: sleep_and_display
****************************************************************************/
static void sleep_and_display(int n, int us)
{
struct sched_param sparam;
us /= 100;
do
{
int status = sched_getparam(gettid(), &sparam);
if (status != 0)
{
printf("priority_inheritance: ERROR sched_getparam failed\n");
ASSERT(false);
}
if (us == 0 || g_priority_tracking[n] != sparam.sched_priority)
{
if (g_priority_tracking[n] == 0)
{
printf("priority_inheritance: "
"Task%1d initial priority is:%d\n",
n, sparam.sched_priority);
}
else
{
printf("priority_inheritance: "
"Task%1d priority was:%d is:%d\n",
n, g_priority_tracking[n], sparam.sched_priority);
}
g_priority_tracking[n] = sparam.sched_priority;
FFLUSH();
}
usleep(100);
us--;
}
while (us > 0);
}
/****************************************************************************
*
****************************************************************************/
static int adversary(int argc, FAR char *argv[])
{
int index = atoi(argv[1]);
int inital_delay = atoi(argv[2]);
int hold_delay = atoi(argv[3]);
sleep_and_display(index, inital_delay);
printf("priority_inheritance: "
"%s Started, waiting %d uS to take count\n", argv[0], inital_delay);
sem_wait(&g_sem);
sleep_and_display(index, hold_delay);
sem_post(&g_sem);
printf("priority_inheritance: %s Posted\n", argv[0]);
sleep_and_display(index, 0);
return 0;
}
/****************************************************************************
* Name: nhighpri_waiting
****************************************************************************/
static int nhighpri_waiting(void)
{
int n = 0;
int i;
for (i = 0; i < NHIGHPRI_THREADS; i++)
{
if (g_highstate[i] == WAITING)
{
n++;
}
}
return n;
}
/****************************************************************************
* Name: nhighpri_running
****************************************************************************/
static int nhighpri_running(void)
{
int n = 0;
int i;
for (i = 0; i < NHIGHPRI_THREADS; i++)
{
if (g_highstate[i] != DONE)
{
n++;
}
}
return n;
}
/****************************************************************************
* Name: highpri_thread
****************************************************************************/
static FAR void *highpri_thread(FAR void *parameter)
{
int threadno = (int)((intptr_t)parameter);
int ret;
g_highstate[threadno - 1] = RUNNING;
printf("highpri_thread-%d: Started\n", threadno);
FFLUSH();
sleep(1);
printf("highpri_thread-%d: Calling sem_wait()\n", threadno);
g_highstate[threadno - 1] = WAITING;
ret = sem_wait(&g_sem);
g_highstate[threadno - 1] = DONE;
if (ret != 0)
{
printf("highpri_thread-%d: "
"ERROR sem_take failed: %d\n", threadno, ret);
ASSERT(false);
}
else if (g_middlestate == RUNNING)
{
printf("highpri_thread-%d: SUCCESS midpri_thread is still running!\n",
threadno);
}
else
{
printf("highpri_thread-%d: ERROR -- "
"midpri_thread has already exited!\n",
threadno);
ASSERT(false);
}
sem_post(&g_sem);
printf("highpri_thread-%d: Okay... I'm done!\n", threadno);
FFLUSH();
return NULL;
}
/****************************************************************************
* Name: hog_cpu
****************************************************************************/
static inline void hog_cpu(void)
{
#ifdef CONFIG_ARCH_SIM
/* The simulator doesn't have any mechanism to do asynchronous pre-emption
* (basically because it doesn't have any interrupts/asynchronous events).
* The simulator does "fake" a timer interrupt in up_idle() -- the idle
* thread that only executes when nothing else is running. In the
* simulator, we cannot suspend the middle priority task, or we wouldn't
* have the test that we want. So, we have no option but to pump the fake
* clock here by calling up_idle(). Sigh!
*/
up_idle();
#else
/* On real platforms with a real timer interrupt, we really can hog the
* CPU. When the sleep() goes off in priority_inheritance(), it will
* wake up and start the high priority thread.
*/
volatile int i;
for (i = 0; i < INT_MAX; i++);
#endif
}
/****************************************************************************
* Name: medpri_thread
****************************************************************************/
static FAR void *medpri_thread(FAR void *parameter)
{
printf("medpri_thread: Started ... I won't let go of the CPU!\n");
g_middlestate = RUNNING;
FFLUSH();
/* The following loop will completely block lowpri_thread from running.
* UNLESS priority inheritance is working. In that case, its priority
* will be boosted.
*/
while (nhighpri_running() > 0)
{
hog_cpu();
}
printf("medpri_thread: Okay... I'm done!\n");
FFLUSH();
g_middlestate = DONE;
return NULL;
}
/****************************************************************************
* Name: lowpri_thread
****************************************************************************/
static FAR void *lowpri_thread(FAR void *parameter)
{
FAR void *retval = (FAR void *)-1;
struct sched_param sparam;
int threadno = (int)((intptr_t)parameter);
int expected;
int count;
int policy;
int ret;
int nwaiting = 0;
int i;
g_lowstate[threadno - 1] = RUNNING;
printf("lowpri_thread-%d: Started\n", threadno);
ret = pthread_getschedparam(pthread_self(), &policy, &sparam);
if (ret != 0)
{
printf("lowpri_thread-%d: ERROR pthread_getschedparam failed: %d\n",
threadno, ret);
ASSERT(false);
}
else
{
printf("lowpri_thread-%d: initial priority: %d\n", threadno,
sparam.sched_priority);
if (sparam.sched_priority != g_lowpri)
{
printf(" ERROR should have been %d\n", g_lowpri);
ASSERT(false);
}
}
g_lowstate[threadno - 1] = WAITING;
ret = sem_wait(&g_sem);
if (ret != 0)
{
printf("lowpri_thread-%d: ERROR sem_take failed: %d\n", threadno, ret);
ASSERT(false);
}
else
{
/* Hang on to the thread until the middle priority thread runs */
while (g_middlestate == NOTSTARTED &&
nhighpri_waiting() < NHIGHPRI_THREADS)
{
printf("lowpri_thread-%d: Waiting for the midle pri task to run\n",
threadno);
printf(" g_middlestate: %d\n", (int)g_middlestate);
for (i = 0; i < NHIGHPRI_THREADS; i++)
{
printf(" g_highstate[%d]: %d\n", i, (int)g_highstate[i]);
}
printf(" I still have a count on the semaphore\n");
sem_enumholders(&g_sem);
FFLUSH();
sleep(1);
}
/* Account for all of the semaphore counts. At any given time if there
* are 'n' running high prioity tasks, then the semaphore count should
* be '-n'
*/
sched_lock(); /* Needs to be atomic */
ret = sem_getvalue(&g_sem, &count);
nwaiting = nhighpri_waiting();
sched_unlock();
if (ret < 0)
{
printf("lowpri_thread-%d: ERROR sem_getvalue failed: %d\n",
threadno, errno);
ASSERT(false);
}
printf("lowpri_thread-%d: Sem count: %d, No. highpri thread: %d\n",
threadno, count, nwaiting);
/* The middle priority task is running, let go of the semaphore */
if (g_middlestate == RUNNING && nwaiting == -count)
{
/* Good.. the middle priority task is still running and the counts
* are okay.
*/
retval = NULL;
}
else
{
/* If the sem count is positive, then there all of the higher
* priority threads should have already completed.
*/
printf("lowpri_thread-%d: %s the middle priority task has already"
" exitted!\n",
threadno, count >= 0 ? "SUCCESS" : "ERROR");
ASSERT(count >= 0);
printf(" g_middlestate: %d sem count=%d\n",
(int)g_middlestate, count);
for (i = 0; i < NHIGHPRI_THREADS; i++)
{
printf(" g_highstate[%d]: %d\n",
i, (int)g_highstate[i]);
}
}
}
ret = pthread_getschedparam(pthread_self(), &policy, &sparam);
sem_enumholders(&g_sem);
sem_post(&g_sem);
if (ret != 0)
{
printf("lowpri_thread-%d: ERROR pthread_getschedparam failed: %d\n",
threadno, ret);
ASSERT(false);
}
else
{
if (nwaiting > 0)
{
expected = g_highpri;
}
else
{
expected = g_lowpri;
}
printf("lowpri_thread-%d: %s priority before sem_post: %d\n",
threadno,
sparam.sched_priority != expected ? "ERROR" : "SUCCESS",
sparam.sched_priority);
if (sparam.sched_priority != expected)
{
printf(" ERROR should have been %d\n", expected);
ASSERT(false);
}
}
ret = pthread_getschedparam(pthread_self(), &policy, &sparam);
if (ret != 0)
{
printf("lowpri_thread-%d: ERROR pthread_getschedparam failed: %d\n",
threadno, ret);
ASSERT(false);
}
else
{
printf("lowpri_thread-%d: %s final priority: %d\n",
threadno,
sparam.sched_priority != g_lowpri ? "ERROR" : "SUCCESS",
sparam.sched_priority);
if (sparam.sched_priority != g_lowpri)
{
printf(" ERROR should have been %d\n", g_lowpri);
ASSERT(false);
}
}
sem_enumholders(&g_sem);
printf("lowpri_thread-%d: Okay... I'm done!\n", threadno);
FFLUSH();
g_lowstate[threadno - 1] = DONE;
return retval;
}
#endif /* CONFIG_PRIORITY_INHERITANCE && !CONFIG_DISABLE_PTHREAD */
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: priority_inheritance
****************************************************************************/
void priority_inheritance(void)
{
#if defined(CONFIG_PRIORITY_INHERITANCE) && !defined(CONFIG_DISABLE_PTHREAD)
pthread_t lowpri[NLOWPRI_THREADS];
pthread_t medpri;
pthread_t highpri[NHIGHPRI_THREADS];
pthread_addr_t result;
pthread_attr_t attr;
struct sched_param sparam;
int my_pri;
int status;
int i;
pid_t pids[NUMBER_OF_COMPETING_THREADS];
char args[3][32];
FAR char *argv[4];
char name[32];
int priority;
int restoration_result;
printf("priority_inheritance: Started\n");
g_middlestate = NOTSTARTED;
for (i = 0; i < NHIGHPRI_THREADS; i++) g_highstate[i] = NOTSTARTED;
for (i = 0; i < NLOWPRI_THREADS; i++) g_lowstate[i] = NOTSTARTED;
status = sched_getparam(gettid(), &sparam);
if (status != 0)
{
printf("priority_inheritance: ERROR sched_getparam failed\n");
ASSERT(false);
sparam.sched_priority = PTHREAD_DEFAULT_PRIORITY;
}
my_pri = sparam.sched_priority;
g_highpri = sched_get_priority_max(SCHED_FIFO);
g_lowpri = sched_get_priority_min(SCHED_FIFO);
g_medpri = my_pri - 1;
sem_init(&g_sem, 0, NLOWPRI_THREADS);
sem_setprotocol(&g_sem, SEM_PRIO_INHERIT);
dump_nfreeholders("priority_inheritance:");
/* Start the low priority threads */
for (i = 0; i < NLOWPRI_THREADS; i++)
{
int threadno = i + 1;
printf("priority_inheritance: "
"Starting lowpri_thread-%d (of %d) at %d\n",
threadno, NLOWPRI_THREADS, g_lowpri);
status = pthread_attr_init(&attr);
if (status != 0)
{
printf("priority_inheritance: "
"ERROR pthread_attr_init failed, status=%d\n",
status);
ASSERT(false);
}
sparam.sched_priority = g_lowpri;
status = pthread_attr_setschedparam(&attr, &sparam);
if (status != OK)
{
printf("priority_inheritance: "
"ERROR pthread_attr_setschedparam failed, status=%d\n",
status);
ASSERT(false);
}
else
{
printf("priority_inheritance: "
"Set lowpri_thread-%d priority to %d\n",
threadno, sparam.sched_priority);
}
status = pthread_create(&lowpri[i], &attr, lowpri_thread,
(FAR void *)((uintptr_t)threadno));
if (status != 0)
{
printf("priority_inheritance: "
"ERROR pthread_create failed, status=%d\n", status);
ASSERT(false);
}
}
printf("priority_inheritance: Waiting...\n");
sleep(2);
dump_nfreeholders("priority_inheritance:");
/* Start the medium priority thread */
printf("priority_inheritance: Starting medpri_thread at %d\n", g_medpri);
status = pthread_attr_init(&attr);
if (status != 0)
{
printf("priority_inheritance: "
"ERROR pthread_attr_init failed, status=%d\n", status);
ASSERT(false);
}
sparam.sched_priority = g_medpri;
status = pthread_attr_setschedparam(&attr, &sparam);
if (status != OK)
{
printf("priority_inheritance: "
"ERROR pthread_attr_setschedparam failed, status=%d\n",
status);
ASSERT(false);
}
else
{
printf("priority_inheritance: Set medpri_thread priority to %d\n",
sparam.sched_priority);
}
FFLUSH();
status = pthread_create(&medpri, &attr, medpri_thread, NULL);
if (status != 0)
{
printf("priority_inheritance: "
"ERROR pthread_create failed, status=%d\n",
status);
ASSERT(false);
}
printf("priority_inheritance: Waiting...\n");
sleep(1);
dump_nfreeholders("priority_inheritance:");
/* Start the high priority threads */
for (i = 0; i < NHIGHPRI_THREADS; i++)
{
int threadno = i + 1;
printf("priority_inheritance: "
"Starting highpri_thread-%d (of %d) at %d\n",
threadno, NHIGHPRI_THREADS, g_highpri);
status = pthread_attr_init(&attr);
if (status != 0)
{
printf("priority_inheritance: "
"ERROR pthread_attr_init failed, status=%d\n", status);
ASSERT(false);
}
sparam.sched_priority = g_highpri - i;
status = pthread_attr_setschedparam(&attr, &sparam);
if (status != OK)
{
printf("priority_inheritance: "
"ERROR pthread_attr_setschedparam failed, status=%d\n",
status);
ASSERT(false);
}
else
{
printf("priority_inheritance: "
"Set highpri_thread-%d priority to %d\n",
threadno, sparam.sched_priority);
}
FFLUSH();
status = pthread_create(&highpri[i], &attr, highpri_thread,
(FAR void *)((uintptr_t)threadno));
if (status != 0)
{
printf("priority_inheritance: "
"ERRROR pthread_create failed, status=%d\n", status);
ASSERT(false);
}
}
dump_nfreeholders("priority_inheritance:");
FFLUSH();
/* Wait for all thread instances to complete */
for (i = 0; i < NHIGHPRI_THREADS; i++)
{
printf("priority_inheritance: "
"Waiting for highpri_thread-%d to complete\n", i + 1);
FFLUSH();
pthread_join(highpri[i], &result);
dump_nfreeholders("priority_inheritance:");
}
printf("priority_inheritance: Waiting for medpri_thread to complete\n");
FFLUSH();
pthread_join(medpri, &result);
dump_nfreeholders("priority_inheritance:");
for (i = 0; i < NLOWPRI_THREADS; i++)
{
printf("priority_inheritance: "
"Waiting for lowpri_thread-%d to complete\n", i + 1);
FFLUSH();
pthread_join(lowpri[i], &result);
dump_nfreeholders("priority_inheritance:");
}
/* Perform restoration test */
printf("priority_inheritance: Restoration Test:\n");
sem_init(&g_sem, 0, 1);
priority = COMPETING_THREAD_START_PRIORITY;
argv[0] = args[0];
argv[1] = args[1];
argv[2] = args[2];
argv[3] = NULL;
for (i = 0; i < NUMBER_OF_COMPETING_THREADS; i++)
{
g_priority_tracking[i] = 0;
snprintf(name, sizeof(name), "Task%1d", i);
snprintf(args[0], sizeof(args[0]), "%d", i);
snprintf(args[1], sizeof(args[1]), "%d", i * 10000);
snprintf(args[2], sizeof(args[2]), "%d", i == 0 ? 100000 : 1000);
pids[i] = task_create(name, priority, CONFIG_DEFAULT_TASK_STACKSIZE,
adversary, argv);
priority += PRIORIY_SPREED;
}
priority = COMPETING_THREAD_START_PRIORITY;
restoration_result = 0;
for (i = 0; i < NUMBER_OF_COMPETING_THREADS; i++)
{
printf("priority_inheritance: "
"Waiting for Task-%d to complete\n", i);
waitpid(pids[i], &status, 0);
if (priority != g_priority_tracking[i])
{
printf("priority_inheritance: "
"Task-%d Priority is %d, and was not restored to %d\n",
i, g_priority_tracking[i], priority);
restoration_result |= 1 << i;
}
priority += PRIORIY_SPREED;
}
if (restoration_result != 0)
{
printf("priority_inheritance: ERROR: FAIL Priorities were not "
"correctly restored.\n");
ASSERT(false);
}
else
{
printf("priority_inheritance: PASSED Priority were correctly"
" restored.\n");
}
printf("priority_inheritance: Finished\n");
sem_destroy(&g_sem);
dump_nfreeholders("priority_inheritance:");
FFLUSH();
#endif /* CONFIG_PRIORITY_INHERITANCE && !CONFIG_DISABLE_PTHREAD */
}
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