Here are some stats after make -j8 buildworld from a GENERIC kernel configured with a 16 KB base page size on an EC2 m7g.2xlarge.
```
23601.828u 665.253s 53:45.06 752.4% 89071+1326k 152492+35485io 133520pf+0w
Mon Apr 1 19:56:39 UTC 2024
vm.pmap.l3c.copies: 0
vm.pmap.l3c.protects: 0
vm.pmap.l3c.removes: 0
vm.pmap.l3c.mappings: 104719
vm.pmap.l3c.demotions: 20
vm.pmap.l2.fills: 3
vm.pmap.l2.promotions: 1859
vm.pmap.l2.p_failures: 1633
vm.pmap.l2.mappings: 187
vm.pmap.l2.demotions: 1083
vm.pmap.superpages_enabled: 1
vm.pmap.vmid.epoch: 0
vm.pmap.vmid.next: 0
vm.pmap.vmid.bits: 0
vm.pmap.asid.epoch: 0
vm.pmap.asid.next: 64341
vm.pmap.asid.bits: 16
vm.reserv.reclaimed: 0
vm.reserv.partpopq:
DOMAIN LEVEL SIZE NUMBER
0, -1, 4793472K, 151
vm.reserv.fullpop: 9
vm.reserv.freed: 378421
vm.reserv.broken: 4
```
The L3C size is 2 MB, and the number of L3C mappings is very close to the number of L2 mappings on a kernel configured with a 4 KB base page size, which is what I would expect.