[Bug 1789719] Re: severe performance issue after intel-microcode update

[Henrique de Moraes Holschuh]

Setting to incomplete, since the fact that spectre, ssb and l1tf
mitigations are expensive (and utterly so for some workloads) is well
documented and well known, and there is nothing we can suggest unless we
know the under-the-hood details of the affected workload.

** Changed in: intel-microcode (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1789719

Title:
  severe performance issue after intel-microcode update

Status in intel-microcode package in Ubuntu:
  Incomplete

Bug description:
  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

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