Do we have the tests run on hardware that does not support the relevant
instructions, in addition to running them on CPUs with the AES
instructions?
** Changed in: zfs-linux (Ubuntu Focal)
Status: In Progress => Fix Committed
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https://bugs.launchpad.net/bugs/1881107
Title:
zfs: backport AES-GCM performance accelleration
Status in zfs-linux package in Ubuntu:
Fix Released
Status in zfs-linux source package in Focal:
Fix Committed
Status in zfs-linux source package in Groovy:
Fix Released
Bug description:
== SRU Justification ==
Upstream commit 31b160f0a6c673c8f926233af2ed6d5354808393 contains AES-
GCM acceleration changes that significantly improve encrypted
performance.
Tests on a memory backed pool show performance improvements of ~15-22%
for AES-CCM writes, ~17-20% AES-CCM reads, 34-36% AES-GCM writes and
~79-80% AES-GCM reads on a Sandybridge x86-64 CPU, so this looks like
a promising optimization that will benefit a lot of users.
== The fix ==
Backport of upstream 31b160f0a6c673c8f926233af2ed6d5354808393 - this
is already backported in Groovy ZFS 0.8.3-1ubuntu13
== Test case ==
Run ZFS performance tests from ubuntu_performance_zfs_encryption
ubuntu kernel team autotests. With the fix the encryption runs
significantly faster, as noted earlier in the SRU justification.
Also test with the 4 types of ZFS ubuntu autotests, should not fail
any of these.
== Regression Potential ==
This fix alters the crypto engine and adds in new optimizations for
CPUs that have capable instruction sets. There is a risk that this
new crypto code is erroneous.
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