/**
* @brief
* Add a CPU to the mask of CPUs that is constructed while reading
* vnode definitions files.
*
* @param[in] cpunum - number of cpus
*
* @return int
* @retval 0 Success
* @retval -1 Failure
*
*/
static int
cpumask_add(unsigned int cpunum)
{
if (cpu_mask == NULL) {
if (cpus_nbits == 0)
cpus_nbits = cpuset_cpus_nbits();
cpu_mask = bitmask_alloc(cpus_nbits);
if (cpu_mask == NULL) {
log_err(PBSE_SYSTEM, __func__, "bitmask_alloc failed");
return (-1);
} else
bitmask_clearall(cpu_mask);
}
assert(cpunum < bitmask_nbits(cpu_mask));
(void) bitmask_setbit(cpu_mask, cpunum);
return (0);
}
/*
* check sched domains in system
*
* return 0 - sched domains is true
* 1 - sched domains is wrong, and print error info
* -1 - other error
*/
void check_sched_domains(void)
{
int i;
char buf1[128], buf2[128];
struct bitmask *alldomains = NULL;
/* get the bitmask's len */
if (!cpus_nbits) {
cpus_nbits = cpuset_cpus_nbits();
if (cpus_nbits <= 0) {
tst_resm(TFAIL, "get cpus nbits failed");
return;
}
}
if (getcpuinfo()) {
tst_resm(TFAIL, "getcpuinfo failed");
return;
}
if (partition_domains()) {
tst_resm(TFAIL, "partition domains failed.");
return;
}
alldomains = bitmask_alloc(cpus_nbits);
if (alldomains == NULL) {
tst_resm(TFAIL, "alloc alldomains space failed.");
return;
}
for (i = 0; i < ndomains; i++) {
unsigned int cpu;
bitmask_or(alldomains, alldomains, domains[i]);
for (cpu = bitmask_first(domains[i]);
cpu < bitmask_nbits(domains[i]);
cpu = bitmask_next(domains[i], cpu + 1)) {
if (bitmask_weight(domains[i]) == 1) {
if (cpus[cpu].sched_domain != NULL) {
bitmask_displaylist(buf1, sizeof(buf1),
domains[i]);
bitmask_displaylist(buf2, sizeof(buf2),
cpus[cpu].sched_domain);
tst_resm(TFAIL, "cpu%d's sched domain is not "
"NULL(Domain: %s, "
"CPU's Sched Domain: %s).",
cpu, buf1, buf2);
goto err;
}
break;
}
if (!bitmask_equal(domains[i],
cpus[cpu].sched_domain)) {
bitmask_displaylist(buf1, sizeof(buf1),
domains[i]);
bitmask_displaylist(buf2, sizeof(buf2),
cpus[cpu].sched_domain);
tst_resm(TFAIL, "cpu%d's sched domain is wrong"
"(Domain: %s, CPU's Sched Domain: %s).",
cpu, buf1, buf2);
goto err;
}
}
}
for (i = 0; i < ncpus; i++) {
if (bitmask_isbitset(alldomains, i))
continue;
if (cpus[i].sched_domain) {
tst_resm(TFAIL, "cpu%d has redundant sched domain", i);
goto err;
}
}
tst_resm(TPASS, "check_sched_domains passed");
err:
bitmask_free(alldomains);
}
/*
* hog the cpu time and check the cpu which the task is running on is in the
* cpus of the cpuset or not.
*
* return value: 0 - success.
* 1 - the cpu which the task is running on isn't in the cpus
* of the cpuset.
* -1 - failure for other reason.
*/
int cpu_hog(void)
{
double f = 2744545.34456455;
sigset_t sigset;
struct cpuset *cp = NULL;
struct bitmask *cpumask = NULL;
int cpu;
int nbits;
int ret = 0;
nbits = cpuset_cpus_nbits();
cp = cpuset_alloc();
if (cp == NULL)
return -1;
cpumask = bitmask_alloc(nbits);
if (cpumask == NULL) {
ret = -1;
goto err1;
}
if (sigemptyset(&sigset) < 0) {
ret = -1;
goto err2;
}
sigsuspend(&sigset);
if (cpuset_cpusetofpid(cp, 0) < 0) {
ret = -1;
goto err2;
}
if (cpuset_getcpus(cp, cpumask) != 0) {
ret = -1;
goto err2;
}
while (!end) {
f = sqrt(f * f);
cpu = cpuset_latestcpu(0);
if (cpu < 0) {
warn("get latest cpu failed.\n");
ret = -1;
goto err2;
}
if (!bitmask_isbitset(cpumask, cpu)) {
char str[50];
bitmask_displaylist(str, 50, cpumask);
warn("the task(%d) is running on the cpu(%d) excluded"
" by cpuset(cpus: %s)\n", getpid(), cpu, str);
ret = 1;
goto err2;
}
}
err2:
bitmask_free(cpumask);
err1:
cpuset_free(cp);
return ret;
}
