c1be839971
Right now we optionally allocate 8 counters per table entry, so in addition to memory consumed by counters, we require 8 pointers worth of space in each entry even when counters are not allocated (the default). Instead, define a UMA zone that returns contiguous per-CPU counter arrays for use in table entries. On amd64 this reduces sizeof(struct pfr_kentry) from 216 to 160. The smaller size also results in better slab efficiency, so memory usage for large tables is reduced by about 28%. Reviewed by: kp MFC after: 2 weeks Differential Revision: https://reviews.freebsd.org/D24843 |
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