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空闲NVMe-oF AFF 系统上的CPU高于预期

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perf<a>2008768636</a><a>nve-of</a><a>nvmf</a><a>for-translation</a>
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适用场景

  • ONTAP 9
  • 采用基于网络结构的NVMe (NVMe-oF)配置且具有NVMe驱动器的所有AFF 系统
  • 采用基于TCP的NVMe (NVMe/TCP)配置且具有NVMe驱动器的所有AFF系统

问题描述

  • 如果客户端已连接、但客户端IOPS为0、则CPU可能会空闲大约10%或20%
  • 示例: A400中节点Shell上的sysstat -m显示核心0-14为0%、而15-19为40%(为便于阅读、删除了某些行):
Cluster::> node run -node <node> sysstat -m 1
CPU15 CPU16 CPU17 CPU18 CPU19
  44%   38%   39%   41%   38%
  44%   37%   40%   42%   38%
  45%   38%   39%   44%   38%
  43%   37%   40%   41%   38%
  44%   37%   39%   41%   38%
  45%   45%   52%   46%   42%
  43%   37%   39%   42%   38%
  44%   38%   39%   40%   38%
  44%   41%   40%   41%   38%
  44%   38%   38%   41%   38%

 

 

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