/*
* get the number of the nodes including offline nodes
*/
int get_nmems(void)
{
struct bitmask *bmp = NULL;
int n = 0;
/* get the bitmask's len */
if (mems_nbits <= 0) {
mems_nbits = cpuset_mems_nbits();
if (mems_nbits <= 0)
return -1;
}
/* allocate the space for bitmask */
bmp = bitmask_alloc(mems_nbits);
if (bmp == NULL)
return -1;
if (present_memmask(bmp)) {
bitmask_free(bmp);
return -1;
}
/* Numbwe of highest set bit +1 is the number of the nodes */
if (bitmask_weight(bmp) <= 0) {
bitmask_free(bmp);
return -1;
}
n = bitmask_last(bmp) + 1;
bitmask_free(bmp);
return n;
}
int main(int argc, const char *argv[])
{
const char *cmd;
unsigned int i, ret;
struct stat statbuf;
struct utsname uts;
cpus_chosen = bitmask_alloc(sysconf(_SC_NPROCESSORS_CONF));
argc--;
argv += 1;
handle_options(&argc, &argv);
cmd = argv[0];
if (argc < 1) {
print_help();
return EXIT_FAILURE;
}
setlocale(LC_ALL, "");
textdomain(PACKAGE);
/* Turn "perf cmd --help" into "perf help cmd" */
if (argc > 1 && !strcmp(argv[1], "--help")) {
argv[1] = argv[0];
argv[0] = cmd = "help";
}
get_cpu_info(0, &cpupower_cpu_info);
run_as_root = !getuid();
if (run_as_root) {
ret = uname(&uts);
if (!ret && !strcmp(uts.machine, "x86_64") &&
stat("/dev/cpu/0/msr", &statbuf) != 0) {
if (system("modprobe msr") == -1)
fprintf(stderr, _("MSR access not available.\n"));
}
}
for (i = 0; i < ARRAY_SIZE(commands); i++) {
struct cmd_struct *p = commands + i;
if (strcmp(p->cmd, cmd))
continue;
if (!run_as_root && p->needs_root) {
fprintf(stderr, _("Subcommand %s needs root "
"privileges\n"), cmd);
return EXIT_FAILURE;
}
ret = p->main(argc, argv);
if (cpus_chosen)
bitmask_free(cpus_chosen);
return ret;
}
print_help();
return EXIT_FAILURE;
}
int main(int argc, const char *argv[])
{
const char *cmd;
unsigned int i, ret;
cpus_chosen = bitmask_alloc(sysconf(_SC_NPROCESSORS_CONF));
argc--;
argv += 1;
handle_options(&argc, &argv);
cmd = argv[0];
if (argc < 1) {
print_help();
return EXIT_FAILURE;
}
setlocale(LC_ALL, "");
textdomain(PACKAGE);
if (argc > 1 && !strcmp(argv[1], "--help")) {
argv[1] = argv[0];
argv[0] = cmd = "help";
}
get_cpu_info(0, &cpupower_cpu_info);
run_as_root = !getuid();
for (i = 0; i < ARRAY_SIZE(commands); i++) {
struct cmd_struct *p = commands + i;
if (strcmp(p->cmd, cmd))
continue;
if (!run_as_root && p->needs_root) {
fprintf(stderr, _("Subcommand %s needs root "
"privileges\n"), cmd);
return EXIT_FAILURE;
}
ret = p->main(argc, argv);
if (cpus_chosen)
bitmask_free(cpus_chosen);
return ret;
}
print_help();
return EXIT_FAILURE;
}
/*
* 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;
}