Public bug reported:
After upgrading my intel-microcode package to
3.20180807a.0ubuntu0.16.04.1 the performance for some test code that I
have has worsened by 400-500%. Chip is an i7-3960X.
lsb_release -rd
Description: Ubuntu 16.04.5 LTS
Release: 16.04
apt-cache policy intel-microcode
intel-microcode:
Installed: 3.20180807a.0ubuntu0.16.04.1
Candidate: 3.20180807a.0ubuntu0.16.04.1
Version table:
*** 3.20180807a.0ubuntu0.16.04.1 500
500 http://us.archive.ubuntu.com/ubuntu xenial-updates/main amd64
Packages
500 http://security.ubuntu.com/ubuntu xenial-security/main amd64
Packages
100 /var/lib/dpkg/status
3.20151106.1 500
500 http://us.archive.ubuntu.com/ubuntu xenial/restricted
** Affects: intel-microcode (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1789719
Title:
severe performance issue after intel-microcode update
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