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arm: hide busdma statistics behind ifdef ARM_BUSDMA_MAPLOAD_STATS
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Authored by mjg on Aug 17 2021, 7:00 PM.
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Details

Reviewers
ian
scottl
Summary

Stat collection using counter(9) is quite expensive on this platform and
these counters normally are not needed.

In particular we see about 1.5% bump in packet rate using Cortex A9

Sponsored by: Rubicon Communications, LLC ("Netgate")

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rG FreeBSD src repository
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