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Bug 1455478

Summary: Traceback during activation of realtime* profile with invalid value of isolated_cores
Product: Red Hat Enterprise Linux 7 Reporter: Tereza Cerna <tcerna>
Component: tunaAssignee: John Kacur <jkacur>
Status: CLOSED DUPLICATE QA Contact: Jiri Kastner <jkastner>
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: 7.4CC: bhu, jeder, jkacur, jskarvad, psklenar
Target Milestone: rc   
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2017-09-13 10:45:57 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On:    
Bug Blocks: 1465887    

Description Tereza Cerna 2017-05-25 09:44:51 UTC 
Description of problem:
=======================
If isolated_cores=0 (invalid value) is set for realtime* profiles. When he activates this profile, traceback appears in /var/log/tuned/tuned.log.
Problem was found in machines from 1minutetip.


Version-Release number of selected component:
=============================================
tuned-2.8.0-3.el7.noarch
tuned-profiles-nfv-host-2.8.0-3.el7.noarch


How reproducible:
=================
Always in 1minutetip machines


Steps to Reproduce:
===================
# cat /etc/tuned/realtime-virtual-host-variables.conf
isolated_cores=0

# tuned-adm profile realtime-virtual-host
# tuned-adm active
Current active profile: realtime-virtual-host


Actual results:
===============
# cat /var/log/tuned/tuned.log 
2017-05-25 04:43:40,451 INFO     tuned.daemon.daemon: stopping tunning
2017-05-25 04:43:40,801 INFO     tuned.profiles.loader: loading profile: realtime-virtual-host
2017-05-25 04:43:40,804 INFO     tuned.daemon.daemon: starting tuning
2017-05-25 04:43:40,808 INFO     tuned.plugins.base: instance cpu: assigning devices cpu0
2017-05-25 04:43:40,810 ERROR    tuned.utils.commands: Executing x86_energy_perf_policy error: 
2017-05-25 04:43:40,810 WARNING  tuned.plugins.plugin_cpu: your CPU doesn't support MSR_IA32_ENERGY_PERF_BIAS, ignoring CPU energy performance bias
2017-05-25 04:43:40,812 INFO     tuned.plugins.plugin_cpu: setting new cpu latency 1
2017-05-25 04:43:40,881 INFO     tuned.plugins.plugin_sysctl: reapplying system sysctl
2017-05-25 04:43:40,884 ERROR    tuned.utils.commands: Writing to file '/sys/devices/virtual/workqueue/cpumask' error: '[Errno 22] Invalid argument'
2017-05-25 04:43:40,884 INFO     tuned.plugins.plugin_bootloader: installing additional boot command line parameters to grub2
2017-05-25 04:43:40,885 INFO     tuned.plugins.plugin_script: calling script '/usr/lib/tuned/realtime/script.sh' with arguments '['start']'
2017-05-25 04:43:40,918 ERROR    tuned.plugins.plugin_script: script '/usr/lib/tuned/realtime/script.sh' error: 1, 'Traceback (most recent call last):
  File "/usr/bin/tuna", line 710, in <module>
    main()
  File "/usr/bin/tuna", line 546, in main
    tuna.isolate_cpus(cpu_list, get_nr_cpus())
  File "/usr/lib/python2.7/site-packages/tuna/tuna.py", line 366, in isolate_cpus
    raise e
OSError: [Errno 22] Invalid argument'
2017-05-25 04:43:40,931 INFO     tuned.daemon.daemon: static tuning from profile 'realtime-virtual-host' applied


Expected results:
=================
No traceback. Add check for this wrong value.
Comment 2 Jaroslav Škarvada 2017-05-25 11:07:42 UTC 
It's traceback in Tuna, we moved away from Tuna in upstream, so it shoudln't happen with the latest git head. Related upstream commit:
https://github.com/redhat-performance/tuned/commit/af56ac35ed839846a475b048d8e982d81bbde6c4
Comment 4 Jaroslav Škarvada 2017-08-09 16:02:37 UTC 
Users can switch to Tuna in Tuned, thus it should be fixed in Tuna, reassigning to Tuna. It should exit cleanly in case of invalid argument.
Comment 5 John Kacur 2017-09-11 12:58:49 UTC 
It would be nice to know the version of tuna as well!
Comment 6 Tereza Cerna 2017-09-12 08:05:48 UTC 
Hi, currently I met this traceback with installed tuna-0.13-5.el7.noarch, tuned packages are the same as in description.