As in 9-1, this hangs on -rt kernel, because alarm(2)
never fires.
In case it runs on single cpu system, it's pretty
much same as 9-1: child process of higher priority
preempts parent.
In case it runs on 2+ CPUs, it doesn't matter that
one child is able to preempt parent, shared value
is going to be increased regardless in all other
children.
Signed-off-by: Jan Stancek <jstan...@redhat.com>
---
.../conformance/interfaces/sched_setparam/10-1.c | 180 ---------------------
1 file changed, 180 deletions(-)
delete mode 100644
testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/10-1.c
diff --git
a/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/10-1.c
b/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/10-1.c
deleted file mode 100644
index 15dfe41..0000000
---
a/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/10-1.c
+++ /dev/null
@@ -1,180 +0,0 @@
-/*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2.
- *
- * 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.
- *
- *
- * Test that the process that is the head of the highest priority list preempt
- * the process calling sched_setparam() when the calling process sets its own
- * priority lower than that of one or more other non-empty process lists.
- *
- * There is no portable way to get the number of CPUs but the test should work
- * for most of UNIX system (including but not limited to: Linux, Solaris, AIX,
- * HPUX, *BSD).
- * This test used shared memory.
- * Steps:
- * 1. Create a share memory segment.
- * 2. Change the policy to SCHED_FIFO.
- * 3. Create nb_cpu children processes which shall have the same priority
- * and policy than the father (cf specs of fork).
- * 4. Call sched_setparam with a priority smaller than those of children.
- * 5. Check if the shared value has been changed by a child process. If not,
- * the test fail.
- */
-
-#include <sched.h>
-#include <stdio.h>
-#include <signal.h>
-#include <sys/ipc.h>
-#include <sys/shm.h>
-#include <unistd.h>
-#include <stdlib.h>
-#include <errno.h>
-#include "posixtest.h"
-
-#ifdef BSD
-#include <sys/types.h>
-#include <sys/param.h>
-#include <sys/sysctl.h>
-#endif
-
-#ifdef HPUX
-#include <sys/param.h>
-#include <sys/pstat.h>
-#endif
-
-static int nb_cpu;
-static int *shmptr;
-
-static int get_ncpu(void)
-{
- int ncpu = -1;
-
- /* This syscall is not POSIX but it should work on many system */
-#ifdef _SC_NPROCESSORS_ONLN
- ncpu = sysconf(_SC_NPROCESSORS_ONLN);
-#else
-#ifdef BSD
- int mib[2];
- size_t len = sizeof(ncpu);
- mib[0] = CTL_HW;
- mib[1] = HW_NCPU;
- sysctl(mib, 2, &ncpu, &len, NULL, 0);
-#else
-#ifdef HPUX
- struct pst_dynamic psd;
- pstat_getdynamic(&psd, sizeof(psd), 1, 0);
- ncpu = (int)psd.psd_proc_cnt;
-#endif /* HPUX */
-#endif /* BSD */
-#endif /* _SC_NPROCESSORS_ONLN */
-
- return ncpu;
-}
-
-static void child_process(void)
-{
- alarm(2);
-
- while (1) {
- (*shmptr)++;
- sched_yield();
- }
-}
-
-static void kill_children(int *child_pid)
-{
- int i;
-
- for (i = 0; i < nb_cpu; i++) {
- kill(child_pid[i], SIGTERM);
- }
-}
-
-int main(void)
-{
- int *child_pid, oldcount, newcount, shm_id, i, j;
- struct sched_param param;
- key_t key;
-
- nb_cpu = get_ncpu();
-
- if (nb_cpu == -1) {
- printf("Can not get the number of CPUs of your machines.\n");
- return PTS_UNRESOLVED;
- }
-
- child_pid = malloc(nb_cpu * sizeof(int));
-
- key = ftok("conformance/interfaces/sched_setparam/10-1.c", 1234);
- shm_id = shmget(key, sizeof(int), IPC_CREAT | 0600);
- if (shm_id < 0) {
- perror("An error occurs when calling shmget()");
- return PTS_UNRESOLVED;
- }
-
- shmptr = shmat(shm_id, 0, 0);
- if (shmptr == (void *)-1) {
- perror("An error occurs when calling shmat()");
- return PTS_UNRESOLVED;
- }
- *shmptr = 0;
-
- param.sched_priority = sched_get_priority_max(SCHED_FIFO);
-
- if (sched_setscheduler(getpid(), SCHED_FIFO, ¶m) != 0) {
- if (errno == EPERM) {
- printf
- ("This process does not have the permission to set
its own scheduling "
- "parameter.\nTry to launch this test as root\n");
- } else {
- perror
- ("An error occurs when calling
sched_setscheduler()");
- }
- return PTS_UNRESOLVED;
- }
-
- for (i = 0; i < nb_cpu; i++) {
- child_pid[i] = fork();
- if (child_pid[i] == -1) {
- perror("An error occurs when calling fork()");
- for (j = 0; j < i; j++) {
- kill(child_pid[j], SIGTERM);
- }
- return PTS_UNRESOLVED;
- } else if (child_pid[i] == 0) {
-
- child_process();
-
- printf("This code should not be executed.\n");
- return PTS_UNRESOLVED;
- }
- }
-
- sleep(1);
-
- param.sched_priority--;
-
- oldcount = *shmptr;
- if (sched_setparam(getpid(), ¶m) != 0) {
- perror("An error occurs when calling sched_setparam()");
- kill_children(child_pid);
- return PTS_UNRESOLVED;
- }
- newcount = *shmptr;
-
- if (newcount == oldcount) {
- printf
- ("The calling process does not relinquish the processor\n");
- kill_children(child_pid);
- return PTS_FAIL;
- }
-
- printf("Test PASSED\n");
- kill_children(child_pid);
- return PTS_PASS;
-}
--
1.8.3.1
------------------------------------------------------------------------------
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