[bug] turbostat reports understated Avg_MHz and %Busy on Knights Landing
Bug #1519646 reported by
XiongZhang
This bug affects 1 person
| Affects | Status | Importance | Assigned to | Milestone | |
|---|---|---|---|---|---|
| intel |
Fix Released
|
Undecided
|
Unassigned | ||
| linux (Ubuntu) |
Fix Released
|
Undecided
|
Unassigned | ||
| Xenial |
Fix Released
|
Undecided
|
Unassigned | ||
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
| information type: | Proprietary → Public |
| Changed in linux (Ubuntu Xenial): | |
| status: | New → Fix Released |
| Changed in intel: | |
| status: | New → Fix Released |
To post a comment you must log in.
