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High CPU utilization inte...

High CPU utilization intermittenly

Created: Sep 27, 2019 10:01:19Latest reply: Sep 27, 2019 10:05:56 87 1 0 0
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A S5700 sometimes has a high CPU usage. From the log we can see that the high task is bmLink.0, what functions is the task responsible for？ What is the possible reason?

<S5700>dis cpu-us

CPU Usage Stat. Cycle: 60 (Second)
CPU Usage            : 86% Max: 93%
CPU Usage Stat. Time : 2019-09-26  09:22:53
CPU utilization for five seconds: 86%: one minute: 86%: five minutes: 85%
Max CPU Usage Stat. Time : 2019-09-25 10:35.

TaskName             CPU  Runtime(CPU Tick High/Tick Low)  Task Explanation
bmLINK.0             60%         a/18380f00
OS                    14%         2/58d097fe       Operation System
VIDL                 14%         2/58d097fe       DOPRA IDLE
bcmI                  4%         0/d3b73800       bcmINTR
bcmCNTR.0         3%         0/907b4e00
BFDS                  1%         0/337f9800       BFDS


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Popeye_Wang
Admin Created Sep 27, 2019 10:05:56 Helpful(0) Helpful(0)

The task bmLink.0 is the Interface Management Task, If the number of interfaces are large, the link status of interface flaps, or the optical module is abnormal, the CPU usage of the task may increase.

If a non-Huawei certified optical module is used on the switch, the CPU usage may be high when the optical module is queried
https://support.huawei.com/enterprise/en/bulletins-product/ENEWS2000002116
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Popeye_Wang
Popeye_Wang Admin Created Sep 27, 2019 10:05:56 Helpful(0) Helpful(0)

The task bmLink.0 is the Interface Management Task, If the number of interfaces are large, the link status of interface flaps, or the optical module is abnormal, the CPU usage of the task may increase.

If a non-Huawei certified optical module is used on the switch, the CPU usage may be high when the optical module is queried
https://support.huawei.com/enterprise/en/bulletins-product/ENEWS2000002116
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