Looks like whitehole_spin is _not_ always 0. Contention just seems to be really rare.
On Thu, Jul 25, 2013 at 1:32 PM, Patrick Palka <patr...@parcs.ath.cx> wrote: > It seems that the value of the whitehole_spin counter (as viewable by +RTS > -s) is always zero, which oddly suggests that there is never any contention > on the particular atomic operation whitehole_spin is tracking (located in > copyPart in Evac.c). This may be a symptom of a bug, or it may be the case > that the atomic operation is not necessary. (Or perhaps contention is just > very rare. But if contention is rare, why is this operation being counted > in particular?) Either way, I think this is a bit strange and probably > worth investigating. > > Patrick >
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