Kubelet API / stats / summary /用法NanoCores不正确

Question

Kubernetes版本：1.3.0 Docker版本：1.10.3操作系统：CoreOS稳定版（1068.9.0）VM：m3.xlarge

在k8s节点上，我正在查询kubelet / stats / summary以获取该节点的CPU使用率，并看到意外的结果。 下面是top命令的输出，我有run命令消耗了100％的CPU。

top命令的输出

这是来自调用/ stats / summary /的useNanoCores和时间值。

usageNanoCores: 3203229858
time: 2016-09-06T20:37:44Z
usageNanoCores: 3497892888
time: 2016-09-06T20:38:02Z
usageNanoCores: 3497892888
time: 2016-09-06T20:38:02Z
usageNanoCores: 3318318883
time: 2016-09-06T20:38:18Z
usageNanoCores: 3419241048
time: 2016-09-06T20:38:34Z
usageNanoCores: 3218012832
time: 2016-09-06T20:38:46Z
usageNanoCores: 3218012832
time: 2016-09-06T20:38:46Z
usageNanoCores: 3673825154
time: 2016-09-06T20:38:58Z
usageNanoCores: 3213540614
time: 2016-09-06T20:39:16Z
usageNanoCores: 3213540614
time: 2016-09-06T20:39:16Z
usageNanoCores: 3560073628
time: 2016-09-06T20:39:29Z
usageNanoCores: 3196742360
time: 2016-09-06T20:39:43Z
usageNanoCores: 3196742360
time: 2016-09-06T20:39:43Z
usageNanoCores: 3543065178
time: 2016-09-06T20:39:59Z
usageNanoCores: 3323870743
time: 2016-09-06T20:40:18Z
usageNanoCores: 3323870743
time: 2016-09-06T20:40:18Z
usageNanoCores: 3486174845
time: 2016-09-06T20:40:36Z
usageNanoCores: 3486174845
time: 2016-09-06T20:40:36Z
usageNanoCores: 3961347785
time: 2016-09-06T20:40:54Z
usageNanoCores: 3683434468
time: 2016-09-06T20:41:05Z
usageNanoCores: 3892752522
time: 2016-09-06T20:41:19Z
usageNanoCores: 3892752522
time: 2016-09-06T20:41:19Z
usageNanoCores: 3867897133
time: 2016-09-06T20:41:34Z
usageNanoCores: 3867897133
time: 2016-09-06T20:41:34Z
usageNanoCores: 3546368625
time: 2016-09-06T20:41:54Z

由于usageNanoCores是“在示例窗口中平均的CPU总使用率（所有内核的总和）”，并且我有4个内核，所以usageNanoCores是否应始终接近4000000000？

Answer 1

top ％cpu是单核的百分比，因此看起来您繁忙的进程是单线程的，并且仅使用100％的单核。 如果您运行其中的4个，我希望usageNanoCores会更接近预期的4B。