Having just upgraded my fc1 installation to fc2 I experience that the CPU is constantly loaded at about 20% average. On the system monitor applet the load appears as spikes when using a 0.5 sec update interval. The spikes are neither regularly spaced nor equal in height. When running top in a terminal it reports the average user space load at about 20%, approx 1% system load, and about 80% idle time. No process in the process list eat more than 1%-2%.
My guess is that some process is started regularly that eats up a lot of resources and then dies. I have tried catching this - without any luck. I have some of the kernel userspace helper threads under suspicion (a khelper). It's kind'a frustrating so I hope somebody has an idea at to what is happening.
/rud