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Increment td->td_intr_nesting_level for LAPIC timer interrupts. Among other

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things it hints SCHED_ULE to run clock swi handlers on their native CPUs,
avoiding many unneeded IPI_PREEMPT calls.
This commit is contained in:
Alexander Motin 2010-07-24 10:49:59 +00:00
parent b577f44398
commit 017cb944b1
1 changed files with 2 additions and 0 deletions
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2
sys/x86/x86/local_apic.c
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@ -811,10 +811,12 @@ lapic_handle_timer(struct trapframe *frame)
critical_enter();
if (lapic_et.et_active) {
td = curthread;
td->td_intr_nesting_level++;
oldframe = td->td_intr_frame;
td->td_intr_frame = frame;
lapic_et.et_event_cb(&lapic_et, lapic_et.et_arg);
td->td_intr_frame = oldframe;
td->td_intr_nesting_level--;
}
critical_exit();
}