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0 pointsfear911y ago0 comments

It differs by CPU model.

0 comments

So some CPU models wait 120 cycles and others wait a millisecond (millions of cycles)? That seems like a pretty drastic difference. I wonder why they would write code with such a drastic difference between CPU models.

fear91OP1y ago

No, Haswell's PAUSE is 9 cycles, the P-cores of Alder Lake are 160 cycles. Zen 4 is 65.

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0 pointsfear911y ago0 comments

It differs by CPU model.

0 comments

Thorrez1y ago

So some CPU models wait 120 cycles and others wait a millisecond (millions of cycles)? That seems like a pretty drastic difference. I wonder why they would write code with such a drastic difference between CPU models.

fear91OP1y ago

No, Haswell's PAUSE is 9 cycles, the P-cores of Alder Lake are 160 cycles. Zen 4 is 65.

j / k navigate · click thread line to collapse