On Sun, Sep 16, 2007 at 09:11:00PM +0200, Jan Hoevers wrote: > The NTP pool doesn't generate much traffic, but it comes in bursts of > approximately an hour. Yesterday I was closely monitoring such a burst, > with a bandwith of 230 kbit/sec, quite stable for about 30 minutes. > Nothing extreme for a 4801, I would say. > It surprised me that the Soekris was running > 50% CPU, the "top" > display revealed that it was almost entirely interrupt processing.
The system may not be as busy as it appears. The system estimates the %CPU spent in the system, in userland, and in interrupt handling by periodically "sampling" the state of the system. If the system is switching from idle to system/user/interrupt and back very quickly, but the samples coincide with the "busy" intervals, then you will get an incorrect result. Google for "Secretly Monopolizing the CPU Without Superuser Privileges" for a more elaborate explanation. Dave -- David Young OJC Technologies [EMAIL PROTECTED] Urbana, IL * (217) 278-3933 ext 24 _______________________________________________ Soekris-tech mailing list [email protected] http://lists.soekris.com/mailman/listinfo/soekris-tech
