For the tick read itself itt's probably time for code patching, and
thus taking the number of loads down to one.
Hi Dave,
True, we could save one more load, by patching tick_get_tick() but that
would save us only 3-5 instructions because with the changes done in
this patchset the extra load comes from the same cacheline as the other
two variables: offset and quotient. So overall, we still have 3 loads as
before, but they are much faster compared to what we have now, where
every load is from a different cacheline.
Pasha
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