ICX 7450-48 appl process cpu usage

[tadesxz]

Hi guys,

Hope you're well.

We've noticed a very strange behaviour in our ICX7450. We got a very high CPU usage but didn't ffind anything that justify it. This only occurs with CPU0. CPU1 is working fine as you can see below.

SSH@SPCRDC2ITA001#sh cpu-utilization 
cpu0:
7 percent busy, from 4 sec ago
1   sec avg: 99 percent busy
5   sec avg:  8 percent busy
60  sec avg:  9 percent busy
300 sec avg:  7 percent busy
cpu1:
0 percent busy, from 2 sec ago
1   sec avg: 0 percent busy
5   sec avg: 0 percent busy
60  sec avg: 0 percent busy
300 sec avg: 0 percent busy

==========================

SSH@SPCRDC2ITA001#sh cpu-utilization tasks 
top - 16:57:11 up 160 days, 13:54,  0 users,  load average: 4.18, 4.02, 3.97
 Threads: 163 total,   2 running, 161 sleeping,   0 stopped,   0 zombie
 %Cpu0  :  87.0/12.3   99[||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| ]
 %Cpu1  :   0.0/0.0     0[                                                                                                    ]
 GiB Mem : 22.8/1.951    [                                                                                                    ]
 GiB Swap:  0.0/0.000    [                                                                                                    ]

The proccess that seems to be offendig this device is

  1590 root      21   1  670.6m 369.9m 85.0 18.5 164688:55 R          `- appl

So, there is a way to restart just this process or something like that? Do you know what is the cause of this usage for this task?

We are trying to avoid a device restart in this case.

Thanks in advance.

Regards,
Marcelo

[BenBeck]

High CPU (in 'show cpu') situations are generally unique, so it is hard to compare them. If you have high CPU and need help troubleshooting, please open a support case.

APPL task in 'show cpu task' will generally show the most usage (expected) even when overall CPU usage (value in 'show cpu') is low. This does not indicate a problem.

[AlexBish613]

We are experiencing a High CPU during the day on ICX 7250 running Switching (Layer 2 traffic) and we used to have a high CPU on ICX 7550 Router due to Layer 4 and 5 packets. 
The reason why I mentioned both models is that both were connected to VSmart Zone and both were dropping CPU to 1%  after I dsiconected them from SZ.  So, we had the cas opened with Support and It took a lot itme to figure out why we had a hight CPU.