IOSD process getting 50 % cpu utilization

HI,
I have VSS running on 2 cisco WS-C4506-E.
My process cpu goes high and when i check IOSD prcoess taking majority of CPU
egtc-dsw-c4k# show processes cpu sorted
Core 0: CPU utilization for five seconds: 12%; one minute: 13%; five minutes: 17%
Core 1: CPU utilization for five seconds: 44%; one minute: 49%; five minutes: 54%
PID    Runtime(ms) Invoked uSecs 5Sec     1Min     5Min     TTY   Process
8539   4036624     63457075 466    28.18    30.90    35.78    0     iosd
11758 1594385     12585851 126    0.32     0.26     0.24     0     ffm
What is this IOSD process do
Thanks

ASim,
Is there any chance for you to log a CIsco TAC case so that we login to your device and check what causing the CPU to go high?
Else here is TS method :
====================
1- Check the CPU utilization (Show proc cpu sorted | ex 0.00) >>Check which process is utilizing more CPU usage.
2- Check STP to see if there are any loops (show spann det | in ieee|from|occur|is exec) >> Check for any STP changes for VLAN , If yes then track that vlan and see which inteface is sending and recieving high packets or any drops on that particular interface.
3-Check the CPU packets Stats,
4-Use the following inbuilt non impacting debug to find out the packets going to the CPU(menioned in the same high CPU troubleshooting document)
Switch#debug platform packet all receive buffer
platform packet debugging is on
Switch#show platform cpu packet buffered
Focus on finding any common traits in the packets like srcmac etc.Once we know the bulk of the traffic goingto the CPU the source can be shut off
to bring the CPU down.
Hope that helps,
REgards
Inayath
https://supportforums.cisco.com/message/3970053#3970053
https://supportforums.cisco.com/thread/2197388

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