** Changed in: linux (Ubuntu)
Status: Incomplete => Triaged
** Changed in: ubuntu-power-systems
Status: Incomplete => Triaged
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https://bugs.launchpad.net/bugs/1719545
Title:
[P9][LTCTest][Opal][FW910] cpupower monitor shows multiple stop
Idle_Stats
Status in The Ubuntu-power-systems project:
Triaged
Status in linux package in Ubuntu:
Triaged
Bug description:
== Comment: #0 - PAVAMAN SUBRAMANIYAM <[email protected]> - 2017-06-29
02:30:22 ==
---Problem Description---
cpupower monitor shows multiple stop Idle_Stats
---uname output---
Linux zz376p1 4.10.0-26-generic #30~16.04.1-Ubuntu SMP Tue Jun 27 09:38:48
UTC 2017 ppc64le ppc64le ppc64le GNU/Linux
Machine Type = P9
---Debugger---
A debugger is not configured
---Steps to Reproduce---
Install a P9 8375-42A Hardware with Ubuntu 16.04.3 OS.
Then execute the cpupower monitor command to fetch all the Idle_Stats values.
root@zz376p1:~# cpupower monitor
|Idle_Stats
PKG |CORE|CPU | snoo | stop | stop
0| 8| 0| 0.00| 0.00| 2.79
0| 8| 1| 0.00| 0.00| 70.68
0| 8| 2| 0.00| 0.00| 99.87
0| 8| 3| 0.00| 0.00| 67.28
0| 12| 4| 0.00| 0.00| 5.17
0| 12| 5| 0.00| 0.00| 12.50
0| 12| 6| 0.00| 0.00| 99.74
0| 12| 7| 0.00| 0.00| 0.00
8|2048| 8| 0.00| 0.00| 22.14
8|2048| 9| 0.00| 0.00| 102.3
8|2048| 10| 0.00| 0.00| 0.00
8|2048| 11| 0.00| 0.00| 99.97
8|2052| 12| 0.00| 0.00| 99.70
8|2052| 13| 0.00| 0.00| 23.86
8|2052| 14| 0.00| 0.00| 113.1
8|2052| 15| 0.00| 0.00| 0.00
As can be seen it shows 2 columns for stop.
root@zz376p1:~# uname -a
Linux zz376p1 4.10.0-26-generic #30~16.04.1-Ubuntu SMP Tue Jun 27 09:38:48
UTC 2017 ppc64le ppc64le ppc64le GNU/Linux
root@zz376p1:~# cat /etc/os-release
NAME="Ubuntu"
VERSION="16.04.2 LTS (Xenial Xerus)"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu 16.04.2 LTS"
VERSION_ID="16.04"
HOME_URL="http://www.ubuntu.com/";
SUPPORT_URL="http://help.ubuntu.com/";
BUG_REPORT_URL="http://bugs.launchpad.net/ubuntu/";
VERSION_CODENAME=xenial
UBUNTU_CODENAME=xenial
root@zz376p1:~# cat /proc/cpuinfo | tail
processor : 15
cpu : POWER9 (raw), altivec supported
clock : 2600.000000MHz
revision : 1.0 (pvr 004e 0100)
timebase : 512000000
platform : PowerNV
model : 8375-42A
machine : PowerNV 8375-42A
firmware : OPAL
Userspace tool common name: /usr/bin/cpupower
The userspace tool has the following bit modes: 64-bit
Userspace rpm: linux-tools-common
Userspace tool obtained from project website: na
*Additional Instructions for [email protected]:
-Post a private note with access information to the machine that the bug is
occuring on.
-Attach ltrace and strace of userspace application.
.
There are 3 idle_stats (3 states) in this system.
root@zz376p1:/sys/devices/system/cpu/cpu0/cpuidle/state2# cpupower monitor -l
Monitor "Idle_Stats" (3 states) - Might overflow after 4294967295 s
snoo [T] -> snooze
stop [T] -> stop0_lite
stop [T] -> stop1_lite
root@zz376p1:/sys/devices/system/cpu/cpu0/cpuidle/state2# cpupower idle-info
CPUidle driver: powernv_idle
CPUidle governor: menu
analyzing CPU 0:
Number of idle states: 3
Available idle states: snooze stop0_lite stop1_lite
snooze:
Flags/Description: snooze
Latency: 0
Usage: 224
Duration: 423
stop0_lite:
Flags/Description: stop0_lite
Latency: 0
Usage: 1685
Duration: 530522
stop1_lite:
Flags/Description: stop1_lite
Latency: 4
Usage: 12693
Duration: 5405898106
root@zz376p1:/sys/devices/system/cpu/cpu0/cpuidle/state2# cpupower monitor -l
Monitor "Idle_Stats" (3 states) - Might overflow after 4294967295 s
snoo [T] -> snooze
stop [T] -> stop0_lite
stop [T] -> stop1_lite
root@zz376p1:/sys/devices/system/cpu/cpu0/cpuidle/state2# cpupower idle-info
CPUidle driver: powernv_idle
CPUidle governor: menu
analyzing CPU 0:
Number of idle states: 3
Available idle states: snooze stop0_lite stop1_lite
snooze:
Flags/Description: snooze
Latency: 0
Usage: 272
Duration: 905
stop0_lite:
Flags/Description: stop0_lite
Latency: 0
Usage: 2141
Duration: 536399
stop1_lite:
Flags/Description: stop1_lite
Latency: 4
Usage: 15396
Duration: 6625668881
cpu monitor will print the results of all the 3 available idle_stats .
The first stop -> stop0_lite stats
and
The second stop -> stop1_lite stats.
cpupower monitor header prints the header list by getting the name of
the idle stats.
name (name description)
snoo [T] -> snooze
stop [T] -> stop0_lite
stop [T] -> stop1_lite
We can change the header to be more meaningful so user won't interpret
it as 2 columns for stop.
May be we need to change the code to print the header to use name description
instead of name.
.
I will work on the patch and get it resolve.
== Comment: #8 - PAVAMAN SUBRAMANIYAM <[email protected]> - 2017-06-30
03:42:01 ==
I have executed the command again with the fixed cpupower utility.
Submitted patch upstream and awaiting response.
https://lkml.org/lkml/2017/7/31/177
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