I see that in most if not all x86* machines interrupt 0 is assigned to the timer interrupt, not sure about other architectures.
A test in http://powertop.googlecode.com/svn/trunk/powertop.c if (nr > 0 && delta > 0) push_line(line, delta); makes it skip interrupt 0. While it is designed to skip over NMI, LOC, etc., it is missing a valid value. Here (no NO_HZ for X86_64 arch), and using my quick port to python of the original code, I'm seeing the timer interrupt as the biggest offender, but I guess it will appear even for people with NO_HZ. A Related Question: Is LOC relevant for the Wake-ups per second count? I'm really no hardware expert, but here LOC shows counts ~timer *for each core*. Regards Santiago _______________________________________________ Power mailing list [email protected] http://www.bughost.org/mailman/listinfo/power
