[Feature] Use NPEBS CPU_CLK_UNHALTED event for precise cycles on Goldmont
Bug #1591825 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 | ||
Bug Description
CPU architects are recommending to use CPU_CLK_UNHALTED .THREAD+ NPEBS for the cycles / :pp events on Goldmont (and not implement the :ppp variant we added for big core)
HW: Harrisonvile
Upstream status:
v4.7 kernel support this with:
8b92c3a perf/x86/intel: Add Goldmont CPU support
Revision history for this message
| Leann Ogasawara (leannogasawara) wrote | #1 |
| information type: | Proprietary → Public |
| Changed in linux (Ubuntu): | |
| status: | New → Fix Released |
| Changed in intel: | |
| status: | New → Fix Released |
Revision history for this message
| Leann Ogasawara (leannogasawara) wrote | #2 |
Revision history for this message
| Leann Ogasawara (leannogasawara) wrote | #3 |
Revision history for this message
| XiongZhang (xiong-y-zhang) wrote | #4 |
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The v4.8 based kernel has been uploaded to the Yakkety 16.10 archive. I'm setting this to Fix Released.
$ git describe --contains 8b92c3a
v4.7-rc1~191^2~30
$ git show 8b92c3a
commit 8b92c3a78d40fb2
Author: Kan Liang <email address hidden>
Date: Fri Apr 15 00:42:47 2016 -0700
perf/x86/intel: Add Goldmont CPU support