chrt: add control struct
Signed-off-by: Karel Zak <kzak@redhat.com>
This commit is contained in:
Karel Zak
parent
4ec6062678
commit
7a4ea5664e
|
|
@ -52,6 +52,16 @@
|
|||
#define SCHED_RESET_ON_FORK 0x40000000
|
||||
#endif
|
||||
|
||||
/* control struct */
|
||||
struct chrt_ctl {
|
||||
pid_t pid;
|
||||
int policy; /* SCHED_* */
|
||||
int priority;
|
||||
|
||||
unsigned int all_tasks : 1, /* all threads of the PID */
|
||||
reset_on_fork : 1, /* SCHED_RESET_ON_FORK */
|
||||
verbose : 1; /* verbose output */
|
||||
};
|
||||
|
||||
static void __attribute__((__noreturn__)) show_usage(int rc)
|
||||
{
|
||||
|
|
@ -197,10 +207,9 @@ static void show_min_max(void)
|
|||
|
||||
int main(int argc, char **argv)
|
||||
{
|
||||
int i, policy = SCHED_RR, priority = 0, verbose = 0, policy_flag = 0,
|
||||
all_tasks = 0;
|
||||
struct chrt_ctl _ctl = { .pid = -1 }, *ctl = &_ctl;
|
||||
struct sched_param sp;
|
||||
pid_t pid = -1;
|
||||
int i;
|
||||
|
||||
static const struct option longopts[] = {
|
||||
{ "all-tasks", 0, NULL, 'a' },
|
||||
|
|
@ -229,41 +238,39 @@ int main(int argc, char **argv)
|
|||
|
||||
switch (i) {
|
||||
case 'a':
|
||||
all_tasks = 1;
|
||||
ctl->all_tasks = 1;
|
||||
break;
|
||||
case 'b':
|
||||
#ifdef SCHED_BATCH
|
||||
policy = SCHED_BATCH;
|
||||
ctl->policy = SCHED_BATCH;
|
||||
#endif
|
||||
break;
|
||||
case 'f':
|
||||
policy = SCHED_FIFO;
|
||||
ctl->policy = SCHED_FIFO;
|
||||
break;
|
||||
case 'R':
|
||||
#ifdef SCHED_RESET_ON_FORK
|
||||
policy_flag |= SCHED_RESET_ON_FORK;
|
||||
#endif
|
||||
ctl->reset_on_fork = 1;
|
||||
break;
|
||||
case 'i':
|
||||
#ifdef SCHED_IDLE
|
||||
policy = SCHED_IDLE;
|
||||
ctl->policy = SCHED_IDLE;
|
||||
#endif
|
||||
break;
|
||||
case 'm':
|
||||
show_min_max();
|
||||
return EXIT_SUCCESS;
|
||||
case 'o':
|
||||
policy = SCHED_OTHER;
|
||||
ctl->policy = SCHED_OTHER;
|
||||
break;
|
||||
case 'p':
|
||||
errno = 0;
|
||||
pid = strtos32_or_err(argv[argc - 1], _("invalid PID argument"));
|
||||
ctl->pid = strtos32_or_err(argv[argc - 1], _("invalid PID argument"));
|
||||
break;
|
||||
case 'r':
|
||||
policy = SCHED_RR;
|
||||
ctl->policy = SCHED_RR;
|
||||
break;
|
||||
case 'v':
|
||||
verbose = 1;
|
||||
ctl->verbose = 1;
|
||||
break;
|
||||
case 'V':
|
||||
printf(UTIL_LINUX_VERSION);
|
||||
|
|
@ -276,14 +283,14 @@ int main(int argc, char **argv)
|
|||
}
|
||||
}
|
||||
|
||||
if (((pid > -1) && argc - optind < 1) ||
|
||||
((pid == -1) && argc - optind < 2))
|
||||
if (((ctl->pid > -1) && argc - optind < 1) ||
|
||||
((ctl->pid == -1) && argc - optind < 2))
|
||||
show_usage(EXIT_FAILURE);
|
||||
|
||||
if ((pid > -1) && (verbose || argc - optind == 1)) {
|
||||
if (all_tasks) {
|
||||
if ((ctl->pid > -1) && (ctl->verbose || argc - optind == 1)) {
|
||||
if (ctl->all_tasks) {
|
||||
pid_t tid;
|
||||
struct proc_tasks *ts = proc_open_tasks(pid);
|
||||
struct proc_tasks *ts = proc_open_tasks(ctl->pid);
|
||||
|
||||
if (!ts)
|
||||
err(EXIT_FAILURE, _("cannot obtain the list of tasks"));
|
||||
|
|
@ -291,46 +298,45 @@ int main(int argc, char **argv)
|
|||
show_rt_info(tid, FALSE);
|
||||
proc_close_tasks(ts);
|
||||
} else
|
||||
show_rt_info(pid, FALSE);
|
||||
show_rt_info(ctl->pid, FALSE);
|
||||
|
||||
if (argc - optind == 1)
|
||||
return EXIT_SUCCESS;
|
||||
}
|
||||
|
||||
errno = 0;
|
||||
priority = strtos32_or_err(argv[optind], _("invalid priority argument"));
|
||||
ctl->priority = strtos32_or_err(argv[optind], _("invalid priority argument"));
|
||||
|
||||
#ifdef SCHED_RESET_ON_FORK
|
||||
/* sanity check */
|
||||
if ((policy_flag & SCHED_RESET_ON_FORK) &&
|
||||
!(policy == SCHED_FIFO || policy == SCHED_RR))
|
||||
errx(EXIT_FAILURE, _("SCHED_RESET_ON_FORK flag is supported for "
|
||||
"SCHED_FIFO and SCHED_RR policies only"));
|
||||
if (ctl->reset_on_fork) {
|
||||
if (ctl->policy != SCHED_FIFO && ctl->policy != SCHED_RR)
|
||||
errx(EXIT_FAILURE, _("SCHED_RESET_ON_FORK flag is supported for "
|
||||
"SCHED_FIFO and SCHED_RR policies only"));
|
||||
ctl->policy |= SCHED_RESET_ON_FORK;
|
||||
}
|
||||
#endif
|
||||
|
||||
policy |= policy_flag;
|
||||
if (ctl->pid == -1)
|
||||
ctl->pid = 0;
|
||||
sp.sched_priority = ctl->priority;
|
||||
|
||||
if (pid == -1)
|
||||
pid = 0;
|
||||
sp.sched_priority = priority;
|
||||
|
||||
if (all_tasks) {
|
||||
if (ctl->all_tasks) {
|
||||
pid_t tid;
|
||||
struct proc_tasks *ts = proc_open_tasks(pid);
|
||||
struct proc_tasks *ts = proc_open_tasks(ctl->pid);
|
||||
|
||||
if (!ts)
|
||||
err(EXIT_FAILURE, _("cannot obtain the list of tasks"));
|
||||
while (!proc_next_tid(ts, &tid))
|
||||
if (sched_setscheduler(tid, policy, &sp) == -1)
|
||||
if (sched_setscheduler(tid, ctl->policy, &sp) == -1)
|
||||
err(EXIT_FAILURE, _("failed to set tid %d's policy"), tid);
|
||||
proc_close_tasks(ts);
|
||||
} else if (sched_setscheduler(pid, policy, &sp) == -1)
|
||||
err(EXIT_FAILURE, _("failed to set pid %d's policy"), pid);
|
||||
} else if (sched_setscheduler(ctl->pid, ctl->policy, &sp) == -1)
|
||||
err(EXIT_FAILURE, _("failed to set pid %d's policy"), ctl->pid);
|
||||
|
||||
if (verbose)
|
||||
show_rt_info(pid, TRUE);
|
||||
if (ctl->verbose)
|
||||
show_rt_info(ctl->pid, TRUE);
|
||||
|
||||
if (!pid) {
|
||||
if (!ctl->pid) {
|
||||
argv += optind + 1;
|
||||
execvp(argv[0], argv);
|
||||
err(EXIT_FAILURE, _("failed to execute %s"), argv[0]);
|
||||
|
|
|
|||
Loading…
Reference in New Issue