And the exact kernel version is also of high interest - I assume the HWE
kernel was used (4.15) and not the GA kernel (4.4)?!
** Also affects: ubuntu-z-systems
Importance: Undecided
Status: New
** Changed in: ubuntu-z-systems
Assignee: (unassigned) => Skipper Bug Screeners (skipper-screen-team)
** Changed in: ubuntu-z-systems
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1812182
Title:
Performance degradation with SPECint2017
Status in Ubuntu on IBM z Systems:
Incomplete
Status in gcc-5 package in Ubuntu:
Incomplete
Status in glibc package in Ubuntu:
Incomplete
Status in linux package in Ubuntu:
Incomplete
Bug description:
Problem description:
During our Linux distribution performance regression testing, we found
*significant* performance degradations on Ubuntu 16.04.5 LTS compared
to other major Linux distributions on s390x when running SPECint2017.
Some SPECint2017 micro-benchmarks show a performance degradation of
40%.
Hardware environment:
IBM z14, LPAR
1 IFL, SMT on
4GiB memory
Software environment:
Ubuntu 16.04.5 LTS
SPECint2017
Analysis:
We are currently in the progress of analyzing the problem and will get
back to this bug as soon as we have more insights.
To manage notifications about this bug go to:
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