[Bug 1717382] Re: [Bug] Glibc: performance improvement patches

[Steve Langasek]

This is fixed in newer releases of Ubuntu, including 2 LTSes that have
been released since this bug was filed.  We have not found capacity to
land this in Ubuntu 16.04 in 2.5 years; I'm therefore marking this
wontfix which is more realistic.  Users will get improved performance by
upgrading to Ubuntu 18.04 or Ubuntu 20.04.

** Changed in: glibc (Ubuntu Xenial)
       Status: Confirmed => Won't Fix

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Title:
  [Bug] Glibc: performance improvement patches

Status in GLibC:
  Fix Released
Status in intel:
  Fix Released
Status in glibc package in Ubuntu:
  Fix Released
Status in glibc source package in Xenial:
  Won't Fix
Status in glibc source package in Zesty:
  Won't Fix
Status in glibc source package in Artful:
  Fix Released

Bug description:
  Description:

  Intel’s new request – for performance related patches that need to be
  picked up as part of one the Ubuntu 16.04 LTS family releases and
  Ubuntu 17.10:

  Glibc 2.23 needs the first 2 patches on hjl/pr21258/2.23 branch:
  https://sourceware.org/git/gitweb.cgi?p=glibc.git;a=shortlog;h=refs/heads/hjl/pr21258/2.23
  Patches: Address transition penalty when SSE instructions are mixed with 256-bit AVX or 512-bit AVX512 load instructions.

  Target Release: TBD

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