High CPU 3850

[ittechk4u1]

Hello all,

we are facing issue of HIGH CPU usage on 3850 switch.

here is the output:

DC1#show process cpu  | ex 0.0
Core 0: CPU utilization for five seconds: 74%; one minute: 76%; five minutes: 75%
Core 1: CPU utilization for five seconds: 100%; one minute: 71%; five minutes: 73%
Core 2: CPU utilization for five seconds: 67%; one minute: 78%; five minutes: 73%
Core 3: CPU utilization for five seconds: 31%; one minute: 46%; five minutes: 49%
PID     Runtime(ms) Invoked   uSecs  5Sec 1Min 5Min TTY   Process
6348    3702240     385015138 422    48.9 47.9 48.1 1088  fed
6350    1773725     110398322 196    0.23 0.13 0.11 0     stack-mgr
6924    389323      346130935 65     1.25 0.92 0.98 0     pdsd
11138   763159      170028112 166    17.6 16.7 16.5 34816 iosd

DC1#

more info:

DC1#show process cpu detail process fed sorted | ex 0.0
Core 0: CPU utilization for five seconds: 49%; one minute: 76%; five minutes: 75%
Core 1: CPU utilization for five seconds: 93%; one minute: 73%; five minutes: 72%
Core 2: CPU utilization for five seconds: 74%; one minute: 72%; five minutes: 71%
Core 3: CPU utilization for five seconds: 42%; one minute: 44%; five minutes: 48%
PID    T C  TID    Runtime(ms) Invoked uSecs  5Sec      1Min     5Min     TTY   Process
                                               (%)       (%)      (%)
6348   L           3927790     3850488 422    48.43     48.13   48.13   1088  fed
6348   L 1  6796   3348193     1805797 0      22.70     23.03   23.06   0     fed-ots-main
6348   L 2  11805  1568428     3663098 0      22.01     22.76   22.82   0     PunjectRx
6348   L 3  6825   2096408     1479602 0      2.59      1.26    1.22    0     IntrDrv
6348   L 0  10510  1488683     1778962 0      0.50      0.36    0.33    0     Xcvr
6348   L 3  6799   816750      1915637 0      0.23      0.25    0.24    0     fed-ots-nfl

DC1#show process cpu detail process iosd sorted | ex 0.0
Core 0: CPU utilization for five seconds: 67%; one minute: 75%; five minutes: 75%
Core 1: CPU utilization for five seconds: 91%; one minute: 74%; five minutes: 72%
Core 2: CPU utilization for five seconds: 81%; one minute: 73%; five minutes: 72%
Core 3: CPU utilization for five seconds: 34%; one minute: 43%; five minutes: 48%
PID    T C  TID    Runtime(ms) Invoked uSecs  5Sec      1Min     5Min     TTY   Process
                                               (%)       (%)      (%)
11138  L           784929      1701424 166    14.93     16.62   16.56   0     iosd
11138  L 3  12073  1335396     2512635 0      15.02     14.52   14.39   34816 iosd.fastpath
241    I           7767        3788154 0      0.55      0.55    0.55    0       IP Input
168    I           711327      9485598 0      0.11      0.44    0.33    0       HSRP Common
414    I           3394513     5088034 0      0.11      0.33    0.33    0       SNMP ENGINE
416    I           2549853     1019275 0      0.11      0.22    0.22    0       IP SNMP

DC1#

Help anyone!!!!

[Mark Malone]

Hi

follow this doc to tshoot those processes in 3850s

There is known FED bugs as well in 3850s what ios-xe version are you running ?

http://www.cisco.com/c/en/us/support/docs/switches/catalyst-3850-series-switches/117594-technote-hicpu3850-00.html

[ittechk4u1]

SW version is : 03.07.03E

Thanks

[Mark Malone]

That's and early deployment version ED you may be better off with the recommended MD release 3.6.6 , it would be considered  more stable

[ittechk4u1]

Will try and update here.

Thanks

[sbhadrav@cisco.com]

This document describes how to troubleshoot CPU usage concerns, primarily due to interrupts, on the new Cisco IOS®-XE platform. Additionally, the document introduces several new commands on this platform that are integral in order to troubleshoot such problems.
https://www.cisco.com/c/en/us/support/docs/switches/catalyst-3850-series-switches/117594-technote-hicpu3850-00.html.