** Information type changed from Proprietary to Public
** Also affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Xenial)
Importance: Undecided
Status: New
** Changed in: linux (Ubuntu Xenial)
Status: New => Fix Released
** Changed in: intel
Status: New => Fix Released
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https://bugs.launchpad.net/bugs/1519646
Title:
[bug] turbostat reports understated Avg_MHz and %Busy on Knights
Landing
Status in intel:
Fix Released
Status in linux package in Ubuntu:
Fix Released
Status in linux source package in Xenial:
Fix Released
Bug description:
turbostat reports understated Avg_MHz and %Busy on Knights Laading due to
fact that APERF/MPERF are incremented every 1024 clocks, while turbostat
assumes that APERF/MPERF are incremented on each clock.
Fix is to add multiplier for APERF/MPERF.
Platform: KNL
This is fixed in 4.3 kernel with:
b2b34df tools/power turbostat: KNL workaround for %Busy and Avg_MHz
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