There is the result of
cat /proc/interrupts|grep timer on my Ubuntu 11.04 machine:
0: 63 0 0 0 IO-APIC-edge timer LOC: 59 44 27 10 Local timer interrupts
As one can see timer interrupts count is suspiciously small and is updated very slowly — it takes more than 30 seconds (or even more) for the value to be incremented. Though this do not cause any work or performance issues, this oddity is very disturbing so I will very appreciate any help.
Here is a uname output, I have Core i5 760 with 4 cores:
Linux calculon 2.6.38-11-generic #48-Ubuntu SMP Fri Jul 29 19:02:55 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux