** Changed in: linux (Ubuntu)
Assignee: Ubuntu on IBM Power Systems Bug Triage (ubuntu-power-triage) =>
Canonical Kernel Team (canonical-kernel-team)
** Changed in: linux (Ubuntu Xenial)
Assignee: (unassigned) => Canonical Kernel Team (canonical-kernel-team)
** Changed in: linux (Ubuntu)
Importance: Undecided => Medium
** Changed in: linux (Ubuntu Xenial)
Importance: Undecided => Medium
** Tags added: kernel-da-key
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https://bugs.launchpad.net/bugs/1744173
Title:
artful: rfi-flush: Switch to new linear fallback flush
Status in The Ubuntu-power-systems project:
Triaged
Status in linux package in Ubuntu:
New
Status in linux source package in Xenial:
New
Bug description:
Change flush from congruence-first with dependencies to linear with
no dependencies, which increases flush performance by 8x on P8, and
3x on P9 (as measured with null syscall loop, which will have the
flush area in the L2).
The flush also becomes simpler and more adaptable to different cache
geometries.
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