We had the same thing with the same version of Modular code. (Which is the reason why we no longer run Modular) I'll have to dig up the bug ID, but basically it's a small memory leak that's triggered by 'show run' or 'write term'. If you have dual supervisors then swap to the other one and the problem will go away for a while. Do you use Rancid or the like to archive configs? That's what was triggering it on our side. Either way, Cisco removed Safe Harbor certification from that code release, so I'd recomend upgrading that code anyway. When I get into the office I'll find the particular bug ID. Ken Matlock [email protected] Network Analyst Exempla Healthcare
________________________________ From: [email protected] on behalf of Holemans Wim Sent: Tue 1/11/2011 5:51 AM To: [email protected] Subject: [c-nsp] cpu spike every minute We are seeing a cpu spike (and corresponding icmp respons latency) every minute on one of our 65XX. It is a 6506-E with Sup32-8G running IOS version ipbasek9-vz.122-18.SXF6. I checked al our mgmt processes (snmp requests, arp table copies,...) but found nothing that could lead to this behavior. Normal icmp respons times (seen from our mgmt station) are a couple msec but every minute this rises till 1000 ms and more. We also see a spike in cpu usage at the same time and I tried to determine what process uses all this cpu and got the following result : Normal : cpu around 11% ldus220#sh proc cpu | excl 0.0 CPU utilization for five seconds: 11%; one minute: 13%; five minutes: 14% PID 5Sec 1Min 5Min Process 1 0.1% 2.7% 3.7% kernel 12312 7.6% 7.0% 7.4% ios-base 12329 1.8% 1.6% 1.2% tcp.proc 12330 0.6% 0.5% 0.5% udp.proc 12331 0.1% 0.2% 0.2% iprouting.iosproc 12332 0.1% 0.1% 0.1% cdp2.iosproc Hit : cpu above 40%, caused by kernel process ldus220#sh proc cpu | excl 0.0 CPU utilization for five seconds: 46%; one minute: 16%; five minutes: 14% PID 5Sec 1Min 5Min Process 1 35.6% 6.3% 4.5% kernel 12312 7.1% 7.1% 7.4% ios-base 12329 1.0% 1.5% 1.2% tcp.proc 12330 0.3% 0.5% 0.5% udp.proc 12331 0.1% 0.2% 0.2% iprouting.iosproc 12332 0.1% 0.1% 0.1% cdp2.iosproc Using cpu detail, I can see it is process id 17 that is hit but I don't have a clue what this process does. How can I find what this process does and if it is internal kernel housekeeping that is causing this or an external cause ? ldus220#sh proc cpu detail | excl 0.0 CPU utilization for five seconds: 46%; one minute: 21%; five minutes: 18% PID/TID 5Sec 1Min 5Min Process Prio STATE CPU 1 33.9% 5.7% 4.3% kernel 26d20h 1 54.2% 79.5% 81.6% [idle thread] 0 Ready 1355d 17 33.9% 5.7% 4.2% 10 Running 6d07h 12312 7.3% 9.8% 9.1% ios-base 106d Any info or pointer to info would be appreciated. Wim Holemans Network Services University of Antwerp _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/ _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
