On Tue, 2014-05-27 at 20:50 +0800, Libo Chen wrote: > in my box: > > perf top -g --sort=symbol > > Events: 3K cycles > 73.27% [k] read_hpet > 4.30% [k] _raw_spin_lock_irqsave > 1.88% [k] __schedule > 1.00% [k] idle_cpu > 0.91% [k] native_write_msr_safe > 0.68% [k] select_task_rq_fair > 0.51% [k] module_get_kallsym > 0.49% [.] sem_post > 0.44% [.] main > 0.41% [k] menu_select > 0.39% [k] _raw_spin_lock > 0.38% [k] __switch_to > 0.33% [k] _raw_spin_lock_irq > 0.32% [k] format_decode > 0.29% [.] usleep > 0.28% [.] symbols__insert > 0.27% [k] tick_nohz_stop_sched_tick > 0.27% [k] update_stats_wait_end > 0.26% [k] apic_timer_interrupt > 0.25% [k] enqueue_entity > 0.25% [k] sched_clock_local > 0.24% [k] _raw_spin_unlock_irqrestore > 0.24% [k] select_idle_sibling
read_hpet? Are you booting box notsc or something? Migration cost is the least of your worries. -Mike -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
