** Also affects: glibc (Ubuntu Zesty)
Importance: Undecided
Status: Confirmed
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https://bugs.launchpad.net/bugs/1663280
Title:
Serious performance degradation of math
** Tags added: upgrade-software-version xenial yakkety zesty
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https://bugs.launchpad.net/bugs/1663280
Title:
Serious performance degradation of math functions in 16.04/16.10/17.04
Regarding glibc 2.24: note that the version in use in Debian
testing/unstable (i.e. stretch/sid) is 2.24-9 which already incorporates
the upstream fix, i.e. Debian is not affected.
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Bug description has been updated to include the following information:
@strikov: According to a quite reliable source [5] all AMD CPUs and
latest Intel CPUs (Skylake and Knights Landing) don't suffer from
AVX/SSE transition penalty. It means that the scope of this bug becomes
smaller and includes
** Bug watch added: Red Hat Bugzilla #1421121
https://bugzilla.redhat.com/show_bug.cgi?id=1421121
** Also affects: glibc (Fedora) via
https://bugzilla.redhat.com/show_bug.cgi?id=1421121
Importance: Unknown
Status: Unknown
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** Changed in: glibc
Status: Unknown => Fix Released
** Changed in: glibc
Importance: Unknown => Medium
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https://bugs.launchpad.net/bugs/1663280
Title:
Serious performance
It seems that the fix has been backported to upstreams's 2.24 branch:
https://sourceware.org/git/?p=glibc.git;a=commit;h=4b8790c81c1a7b870a43810ec95e08a2e501123d
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** Bug watch added: Sourceware.org Bugzilla #20508
https://sourceware.org/bugzilla/show_bug.cgi?id=20508
** Also affects: glibc via
https://sourceware.org/bugzilla/show_bug.cgi?id=20508
Importance: Unknown
Status: Unknown
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Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: glibc (Ubuntu)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/1663280
Title:
