You have been subscribed to a public bug:
The libatlas library delivered with Ubuntu 18.04.1 is build for zEC12. There is
no alternative library available for z13 and z14 exploiting the vector
instructions. The source package from Ubuntu seems to have the z13 patches
applied.
---uname output---
Linux m42lp10 4.15.0-29-generic #31-Ubuntu SMP Tue Jul 17 15:42:24 UTC 2018
s390x s390x s390x GNU/Linux
---Additional Hardware Info---
standard Ubuntu install
Machine Type = z13, z14
---Debugger---
A debugger is not configured
---Steps to Reproduce---
Install libatlas, call any of the standard blas routines, observe that there
are no Z instructions.
Userspace tool common name: libatlas
The userspace tool has the following bit modes: 64 bit
Userspace deb: atlas package in Ubuntu
Userspace tool obtained from project website: na
** Affects: linux (Ubuntu)
Importance: Undecided
Assignee: Skipper Bug Screeners (skipper-screen-team)
Status: New
** Tags: architecture-s39064 bugnameltc-173087 severity-high
targetmilestone-inin---
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libatlas not using vector instructions - large performance impact
https://bugs.launchpad.net/bugs/1803077
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