6500 High CPU Utilization

engineerangelo · ‎07-08-2009

Hi,

We have a problem with a 6506-E which is having a high CPU utilization.

Here's the output from the show proc cpu:

6506_A#sh proc cpu

CPU utilization for five seconds: 79%; one minute: 81%; five minutes: 78%

PID 5Sec 1Min 5Min Process

1 0.1% 1.2% 1.4% kernel

3 0.0% 0.0% 0.0% qdelogger

4 0.0% 0.0% 0.0% devc-pty

5 0.0% 0.0% 0.0% devc-mistral.proc

6 0.0% 0.0% 0.0% pipe

7 0.0% 0.0% 0.0% dumper.proc

4104 0.0% 0.0% 0.0% bflash_driver.proc

12297 0.0% 0.0% 0.0% pcmcia_driver.proc

12298 0.0% 0.0% 0.0% mqueue

12299 0.0% 0.0% 0.0% flashfs_hes.proc

12300 0.0% 0.0% 0.0% dfs_bootdisk.proc

12301 0.0% 0.0% 0.0% ldcache.proc

12302 0.0% 0.0% 0.0% watchdog.proc

12303 0.0% 0.0% 0.0% syslogd.proc

12304 0.0% 0.0% 0.0% name_svr.proc

12305 0.0% 0.1% 0.1% wdsysmon.proc

12306 0.0% 0.0% 0.0% sysmgr.proc

16386 0.0% 0.0% 0.0% chkptd.proc

16403 0.0% 0.0% 0.0% sysmgr.proc

16404 0.0% 0.0% 0.0% syslog_dev.proc

16405 0.0% 0.0% 0.0% itrace_exec.proc

--More-- PID 5Sec 1Min 5Min Process

16406 0.0% 0.0% 0.0% packet.proc

16407 0.0% 0.0% 0.0% installer.proc

16408 75.3% 75.6% 72.7% ios-base

16409 0.0% 0.0% 0.0% fh_fd_rf.proc

16410 0.0% 0.0% 0.0% fh_fd_oir.proc

16411 0.0% 0.0% 0.0% fh_metric_dir.proc

16412 0.0% 0.0% 0.0% fh_fd_snmp.proc

16413 0.0% 0.0% 0.0% fh_fd_none.proc

16414 0.0% 0.0% 0.0% fh_fd_intf.proc

16415 0.0% 0.0% 0.0% fh_fd_counter.proc

16416 0.0% 0.0% 0.0% fh_fd_gold.proc

16417 0.0% 0.0% 0.0% fh_fd_cli.proc

16418 0.0% 0.0% 0.0% fh_fd_timer.proc

16419 0.0% 0.0% 0.0% fh_fd_ioswd.proc

16420 0.0% 0.0% 0.0% fh_server.proc

16421 0.0% 0.0% 0.0% fh_policy_dir.proc

16422 0.0% 0.0% 0.0% ipfs_daemon.proc

16423 0.1% 0.4% 0.4% raw_ip.proc

16424 0.0% 0.0% 0.0% inetd.proc

16425 0.0% 0.1% 0.1% tcp.proc

16426 1.6% 1.7% 1.4% udp.proc

16427 0.6% 0.7% 0.7% iprouting.iosproc

16428 0.1% 0.2% 0.1% cdp2.iosproc

6506_A#

We searched this output in the Output Interpreter and it indicated that it could be an IOS bug. Its IOS is 12.2(18)SXF11.

Hope someone has an idea on this.

Thanks.

Giuseppe Larosa · ‎07-10-2009

Hello Angelo,

there is a single process taking most of cpu resources:

16408 75.3% 75.6% 72.7% ios-base

you should use Bug toolkit tool.

I tried a search for C6500, 12.2 18 SXF11 release using high cpu as search keyword:

I've found the following:

CSCsr12976 Bug Details

High CPU in ION ios-base process

Symptom:

CPU climbs high over a period of time until switch crashes to recover.This is due to "show run" command being run on the switch periodically which hold memory regions and does not release them which in turn contributes to high cpu.

Workaround:

(1) Stop running the "show run" command to prevent the CPU climb.

(2) Reload the switch to recover memory and CPU.

you need to upgrade to something newer

Hope to help

Giuseppe