System tick rate

[Jan Engelhardt]

Hi,


is there an "official" way of obtaining the current tick rate when 
CONFIG_NO_HZ? This is for a simple statistics display tool. Counting the 
interrupts from /proc/interrupts (calculating the difference between two 
timepoints) seems to work, though I have seen at least one x86 machine 
where both IRQ0 and the LOC counters increase, making it not entirely 
obvious which number to take as a base. Suggestions?
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