tiny4412到手了。引导后发现1 2 3 cpu shutdown，这有没有问题呢？

tiny4412到手了。但引导后发现1 2 3 cpu shutdown，这有没有问题呢？

看起来只有一个cpu工作啊。为什么其它的cpu要关闭掉的呢？

[    5.395000] Mali: :::exynos4_result_of_asv : 2
[    5.395000] Mali: mali_dvfs[0].vol = 900000
[    5.395000] Mali: :::exynos4_result_of_asv : 2
[    5.395000] Mali: mali_dvfs[1].vol = 925000
[    5.395000] Mali: :::exynos4_result_of_asv : 2
[    5.395000] Mali: mali_dvfs[2].vol = 1000000
[    5.395000] Mali: :::exynos4_result_of_asv : 2
[    5.400000] Mali: mali_dvfs[3].vol = 1050000
[   10.720000] dm9620 1-2.2:1.0: eth0: link down
[   10.725000] link_reset() speed: 10 duplex: 0
[   10.725000] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
[   11.045000] acc_open
[   11.045000] acc_release
[   12.040000] mtp_open
[   13.495000] init: sys_prop: permission denied uid:1003  name:service.bootanim.exit
[   21.690000] CPU3: shutdown
[   22.445000] CPU2: shutdown
[   22.965000] CPU1: shutdown
[   24.985000] CPU1: Booted secondary processor
[   26.755000] CPU1: shutdown
[   40.985000] CPU1: Booted secondary processor
[   41.585000] CPU1: shutdown
[  133.455000] init: untracked pid 1212 exited

多核的一般都是这样，CPU没活干的时候通常就会自动停了以省电，如果有活干就会自动启动
所以……这是正常的。

xda大神叫它cpu hotplug，4412之类的Cortex-A9 SoC，还有比如高通APQ8064之类的，四个核一起开会很费电很热而且没用，所以他们闲下来只开一到两个核，必要时再开剩下的核

多谢楼上两位！