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Huge pages part 5: A deeper look at TLBs and costsHuge pages part 5: A deeper look at TLBs and costsPosted Mar 31, 2010 17:31 UTC (Wed) by jzbiciak (✭ supporter ✭, #5246)In reply to: Huge pages part 5: A deeper look at TLBs and costs by sync Parent article: Huge pages part 5: A deeper look at TLBs and costs
On Athlons, at least, there's a hardware table walk and a two-level TLB structure. It wouldn't surprise me to find out that the 5 cycle number you report is the average cost of missing the L1 TLB (frequent, fast) and L2 TLB (less frequent, but slower).
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