FM Core process

[FabienneC]

Dear all,

We suddenly noticed high CPU utilization on one of our 7600 routers. I output of show process CPU showed high utlization for the FM core process. I looked it up but did not find information on what this process does.

core-4#sh processes cpu sorted

CPU utilization for five seconds: 99%/11%; one minute: 88%; five minutes: 55%

PID Runtime(ms)     Invoked      uSecs   5Sec   1Min   5Min TTY Process

378       78448         984      79723 87.77% 16.14%  6.11%   0 FM core         

231        1804        6526        276  0.16%  0.20%  0.16%   0 IP Input        

225         208         984        211  0.08%  0.02%  0.01%   0 ADJ resolve proc

I appreciate any feedback on this.

Thank you,

Fabienne.

core-4#sh processes cpu sorted

CPU utilization for five seconds: 99%/11%; one minute: 88%; five minutes: 55%

PID Runtime(ms)     Invoked      uSecs   5Sec   1Min   5Min TTY Process

378       78448         984      79723 87.77% 16.14%  6.11%   0 FM core         

231        1804        6526        276  0.16%  0.20%  0.16%   0 IP Input        

225         208         984        211  0.08%  0.02%  0.01%   0 ADJ resolve proc

[nkarpysh · Accepted solution]

Hello,

This FM core process is responsible from translating the access-list/PBR

and move this into a format  that can be used to program this into the TCAM for traffic-processing.

I see that is not consistently High but spiking:

PID Runtime(ms)     Invoked      uSecs   5Sec   1Min   5Min TTY Process

378       78448         984      79723 87.77% 16.14%  6.11%   0 FM core  

So it makes me think that you have quite long ACLs used for route-maps so when new updates are coming those ACLs are trigered and FM core start to work heavily. Am I right? If there is a chance to optimize ACL in the config or used Named ones if not already?

Nik

[FabienneC]

Thank you Nik,

We had recently configured PBR on the router with a new ACL, we  shortened the ACL and removed uneeded entries. The CPU is now back to  normal.

Thanks again.

[nkarpysh]

Good News!

If possible you can mark my answer as correct one for others to be able to use in future.

Nik

[FabienneC]

Done:)