** Changed in: linux (Ubuntu)
Status: Triaged => In Progress
** Changed in: linux (Ubuntu)
Assignee: Ubuntu on IBM Power Systems Bug Triage (ubuntu-power-triage) =>
Seth Forshee (sforshee)
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https://bugs.launchpad.net/bugs/1714571
Title:
[P9,POwer NV] Perf PMU event : pm_br_2path and pm_ld_miss_l1 is
counted twice when perf stat is done (perf:)
Status in The Ubuntu-power-systems project:
New
Status in linux package in Ubuntu:
Fix Committed
Bug description:
== Comment: #0 - Sukadev Bhattiprolu - 2017-09-01 12:56:47 ==
---Problem Description---
Problem description :
=============
Perf PMU event : pm_br_2path and pm_ld_miss_l1 is counted twice , it is
because two raw point to the same name.
[
{,
"EventCode": "0x20036",
"EventName": "PM_BR_2PATH",
"BriefDescription": "Branches that are not strongly biased",
"PublicDescription": ""
},
{,
"EventCode": "0x40036",
"EventName": "PM_BR_2PATH",
"BriefDescription": "Branches that are not strongly biased",
"PublicDescription": ""
},
Ex :
===
[root@zzfp189p1 ~]# perf stat -e pm_br_2path sleep 1
Performance counter stats for 'sleep 1':
30,163 pm_br_2path
<not counted> pm_br_2path
(0.00%)
1.002046416 seconds time elapsed
[root@zzfp189p1 ~]# perf stat -e pm_ld_miss_l1 sleep 1
Performance counter stats for 'sleep 1':
9,217 pm_ld_miss_l1
<not counted> pm_ld_miss_l1
(0.00%)
1.001956110 seconds time elapsed
---Steps to Reproduce---
Steps to reproduce :
============
1. Install perf (linux-tools)
2. Run
perf stat -e pm_ld_miss_l1 sleep 1
perf stat -e pm_br_2path sleep 1
== Comment: #1 - Sukadev Bhattiprolu - 2017-09-01 12:58:16 ==
The fix for this bug was pulled into Arnaldo's tree:
https://git.kernel.org/pub/scm/linux/kernel/git/acme/linux.git/commit/?h=perf/core&id=828e291e2982a7c10a62aa32195d0cb501cedaae
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