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Occational High CPU on Cat6500 RP

peter.krohn
Level 1
Level 1

Hi,

I have high CPU (100%) occationally on a Catalyst 6500 running disk0:s72033-adventerprisek9_wan-vz.122-33.SXH7.bin.

Normal load is around 25%.

When experiencing 100% last time I found the following - output from sh proc cpu command taken shortly after when the CPU load was normalizing:

CPU utilization for five seconds: 36%; one minute: 67%; five minutes: 71%
PID       5Sec    1Min     5Min Process
1         0.7%    0.4%     0.7% kernel
3         0.0%    0.0%     0.0% devc-pty
4         0.0%    0.0%     0.0% devc-mistral.proc
5         0.0%    0.0%     0.0% pipe
6         0.0%    0.0%     0.0% dumper.proc
4103      1.0%   30.6%    34.5% bflash_driver.proc
4104      0.0%    0.0%     0.0% pcmcia_driver.proc
12297     0.0%    2.0%     2.2% flashfs_hes.proc
12298     0.0%    0.0%     0.0% mqueue
12299     0.0%    0.0%     0.0% dfs_bootdisk.proc
12300     0.0%    0.0%     0.0% ldcache.proc
12301     0.0%    0.0%     0.0% watchdog.proc
12302     0.0%    0.0%     0.0% syslogd.proc
12303     0.0%    0.0%     0.0% name_svr.proc
12304     0.2%    0.0%     0.0% wdsysmon.proc
12305     0.0%    0.0%     0.0% sysmgr.proc
16386     0.0%    0.0%     0.0% sysmgr.proc
16402     0.0%    0.0%     0.0% chkptd.proc
16403     0.0%    0.0%     0.0% syslog_dev.proc
16404     0.0%    0.0%     0.0% itrace_exec.proc
16405     0.0%    0.0%     0.0% packet.proc
16406     0.0%    0.0%     0.0% installer.proc
16407    23.9%   23.5%    23.2% ios-base
16408     0.0%    0.0%     0.0% fh_fd_rf.proc
16409     0.0%    0.0%     0.0% fh_fd_oir.proc
16410     0.0%    0.0%     0.0% fh_fd_env.proc
16411     0.0%    0.0%     0.0% fh_fd_cli.proc
16412     0.0%    0.0%     0.0% fh_metric_dir.proc
16413     0.0%    0.0%     0.0% fh_fd_test.proc
16414     0.0%    0.0%     0.0% fh_fd_snmp.proc
16415     0.0%    0.0%     0.0% fh_fd_none.proc
16416     0.0%    0.0%     0.0% fh_fd_intf.proc
16417     0.0%    0.0%     0.0% fh_fd_gold.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_fd_counter.proc
16421     0.0%    0.0%     0.0% fh_server.proc
16422     0.0%    0.0%     0.0% fh_policy_dir.proc
16423     0.0%    0.0%     0.0% call_home.proc
16424     0.0%    0.0%     0.0% ipfs_daemon.proc
16425     0.0%    0.0%     0.0% fh_fd_config.proc
16426     1.3%    1.3%     1.3% raw_ip.proc
16427     0.0%    0.0%     0.0% inetd.proc
PID       5Sec    1Min     5Min Process
16428     6.4%    4.5%     3.7% tcp.proc
16429     3.1%    3.1%     3.2% udp.proc
16430     0.8%    1.1%     1.4% iprouting.iosproc
16431     0.1%    0.2%     0.2% cdp2.iosproc

Normal load ffor above process is 0.0%

I expect the process to be related to the bootflash. Does anyone know when this process is invoked?

I have a local span session set up for CPU rp traffic, but cannot really find something out of normal.

BR Peter

2 Replies 2

Yogesh Ramdoss
Cisco Employee
Cisco Employee

Hello Peter,


CPU usage due to bflash_driver.proc goes up when the system try to collect, poll and cache the info for all the filesystems available in the switch, at one run. This taks may be invoked by SNMP station polling CISCO-FLASH-MIB.

Please let me know if this helps.

Regards,

Yogesh

Hi Yogesh,

Thx for information.

From the cpu span session it seems that the device stops replying on SNMP polls for more than 5 minuts. Cannot find any polls for the FLASH MIB, but a number of HSRP MIB requests that are not answered. Pretty strange. I'll investigate more. Thx.

Rgds Peter