[Bug 242747] geli: AMD Epyc+GELI not using Hardware AES

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=242747

--- Comment #26 from Eirik Oeverby <ltning-freebsd at anduin.net> ---
(In reply to Conrad Meyer from comment #25)

Let's see .. About 10 seconds sampling, while deliberately reading from a
geli-encrypted zfs volume while creating some read operations (find . -type f
-exec cat {} \; > /dev/null) - there's plenty of writing to that volume at any
given time:

  aesni_encrypt_xts                                             38168
  aesni_decrypt_xts                                            380112
  aesni_cipher_crypt                                           418280
  aesni_cipher_setup_common                                    418280
  aesni_crypt_xts                                              418280
  aesni_process                                                418280

The second probe gives no output at all.

System:
hw.model: AMD EPYC 7302 16-Core Processor (2x)
dev.aesni.0.%desc: AES-CBC,AES-CCM,AES-GCM,AES-ICM,AES-XTS,SHA1,SHA256
kern.geom.eli.threads: 2

Without kern.geom.eli.threads=2 the system quickly reaches a load of 100 or
more.

/Eirik

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