Re: Accuracy of profiling

On 06/05/2015 07:11 AM, Mahmood N wrote:

> Another thing is that I expect the same number of
> RETIRED_INSTRUCTIONS since bzip2 has a number of fixed static
> instructions (input file in the same in both runs) and doesn't
> matter how many times it is executed.

I think these are the hardware counters: they don't sample anything,
and they are the absolute numbers.  So what causes differences?
Interrupts, interaction with I/O devices, and so on.  I would never
expect two runs to be identical.

Andrew.

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