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support setitimer/getitimer

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This commit is contained in:
Tomoki Shirasawa
2016-02-19 15:25:05 +09:00
parent 307b2b8da5
commit 2c50b716fd
5 changed files with 256 additions and 16 deletions
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36
kernel/process.c
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@@ -2478,6 +2478,26 @@ ack:
ihk_mc_spinlock_unlock(&cur_v->migq_lock, irqstate);
}
void
set_timer()
{
struct cpu_local_var *v = get_this_cpu_local_var();
/* Toggle timesharing if CPU core is oversubscribed */
if (v->runq_len > 1 || v->current->itimer_enabled) {
if (!cpu_local_var(timer_enabled)) {
lapic_timer_enable(10000000);
cpu_local_var(timer_enabled) = 1;
}
}
else {
if (cpu_local_var(timer_enabled)) {
lapic_timer_disable();
cpu_local_var(timer_enabled) = 0;
}
}
}
void schedule(void)
{
struct cpu_local_var *v;
@@ -2516,20 +2536,6 @@ redo:
list_add_tail(&prev->sched_list, &(v->runq));
++v->runq_len;
}
/* Toggle timesharing if CPU core is oversubscribed */
if (v->runq_len > 1) {
if (!cpu_local_var(timer_enabled)) {
lapic_timer_enable(10000000);
cpu_local_var(timer_enabled) = 1;
}
}
else {
if (cpu_local_var(timer_enabled)) {
lapic_timer_disable();
cpu_local_var(timer_enabled) = 0;
}
}
}
if (v->flags & CPU_FLAG_NEED_MIGRATE) {
@@ -2556,6 +2562,8 @@ redo:
reset_cputime();
}
set_timer();
if (switch_ctx) {
dkprintf("schedule: %d => %d \n",
prev ? prev->tid : 0, next ? next->tid : 0);