int main(int ac, char **av) {
int lc,num,i; /* loop counter */
char *msg; /* message returned from parse_opts */
cpu_set_t mask;
unsigned int len = sizeof(cpu_set_t);
/* parse standard options */
if ((msg = parse_opts(ac, av, (option_t *)NULL, NULL)) != (char *)NULL){
tst_brkm(TBROK, cleanup, "OPTION PARSING ERROR - %s", msg);
tst_exit();
}
setup();
TEST(num=sysconf(_SC_NPROCESSORS_CONF)); //the number of processor(s)
tst_resm(TINFO,"system has %d processor(s).", num);
/* Check looping state if -i option given */
for (lc = 0; TEST_LOOPING(lc); ++lc) {
Tst_count = 0;
for (testno = 0; testno < TST_TOTAL; ++testno) {
QUICK_TEST(sched_getaffinity(0, len, (cpu_set_t *)-1));
QUICK_TEST(sched_getaffinity(0, 0, &mask));
QUICK_TEST(sched_getaffinity(getpid() + 1, len, &mask));
CPU_ZERO(&mask); //clear
TEST(sched_getaffinity(0,len,&mask)); //call sched_getaffinity()
if(TEST_RETURN == -1) {
tst_resm(TFAIL|TTERRNO, "could not get cpu affinity");
cleanup();
tst_exit();
} else {
tst_resm(TINFO,"cpusetsize is %d", len);
tst_resm(TINFO,"mask.__bits[0] = %lu ",mask.__bits[0]);
for(i=0;i<num;i++){ // check the processor
TEST(CPU_ISSET(i,&mask));
if (TEST_RETURN != -1 ){
tst_resm(TPASS,"sched_getaffinity() succeed ,this process %d is running processor: %d",getpid(), i);
}
}
}
}
}
cleanup();
tst_exit();
}
static void do_test(void)
{
int i;
cpu_set_t *mask;
int nrcpus = 1024;
pid_t pid;
unsigned len;
#if __GLIBC_PREREQ(2, 7)
realloc:
mask = CPU_ALLOC(nrcpus);
#else
mask = malloc(sizeof(cpu_set_t));
#endif
if (mask == NULL)
tst_brkm(TFAIL | TTERRNO, cleanup, "fail to get enough memory");
#if __GLIBC_PREREQ(2, 7)
len = CPU_ALLOC_SIZE(nrcpus);
CPU_ZERO_S(len, mask);
#else
len = sizeof(cpu_set_t);
CPU_ZERO(mask);
#endif
/* positive test */
TEST(sched_getaffinity(0, len, mask));
if (TEST_RETURN == -1) {
CPU_FREE(mask);
#if __GLIBC_PREREQ(2, 7)
if (errno == EINVAL && nrcpus < (1024 << 8)) {
nrcpus = nrcpus << 2;
goto realloc;
}
#else
if (errno == EINVAL)
tst_resm(TFAIL, "NR_CPUS > 1024, we'd better use a "
"newer glibc(>= 2.7)");
else
#endif
tst_resm(TFAIL | TTERRNO, "fail to get cpu affinity");
cleanup();
} else {
tst_resm(TINFO, "cpusetsize is %d", len);
tst_resm(TINFO, "mask.__bits[0] = %lu ", mask->__bits[0]);
for (i = 0; i < num; i++) {
#if __GLIBC_PREREQ(2, 7)
TEST(CPU_ISSET_S(i, len, mask));
#else
TEST(CPU_ISSET(i, mask));
#endif
if (TEST_RETURN != -1)
tst_resm(TPASS, "sched_getaffinity() succeed, "
"this process %d is running "
"processor: %d", getpid(), i);
}
}
#if __GLIBC_PREREQ(2, 7)
CPU_ZERO_S(len, mask);
#else
CPU_ZERO(mask);
#endif
/* negative tests */
QUICK_TEST(sched_getaffinity(0, len, (cpu_set_t *) - 1));
QUICK_TEST(sched_getaffinity(0, 0, mask));
/*
* pid_t -> int -- the actual kernel limit is lower
* though, but this is a negative test, not a positive
* one.
*
* Push comes to shove, if the user doesn't have the
* ability to kill(3) processes (errno = EPERM), then
* set the pid to the highest possible represented
* value and cross your fingers in the hope that
* a) Linux somehow hasn't started allocating PIDs
* this high and b) the PID = INT_MAX isn't in fact
* running.
*/
for (pid = 2; pid < INT_MAX; pid++) {
if (kill(pid, 0) == -1) {
if (errno == ESRCH)
break;
else if (errno == EPERM)
pid = INT_MAX - 1;
}
}
QUICK_TEST(sched_getaffinity(pid, len, mask));
CPU_FREE(mask);
}