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2026-06-08 - 04:03

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #4, slot #6

Rack #0/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #1/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #2/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #3/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #4/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #5/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #6/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #7/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #8/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #9/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #a/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #b/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #c/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #d/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #e/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #f/#0 #1 #2 #3 #4 #5 #6 #7 #8 
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Data to construct the above plot have been generated using the RT test utility cyclictest.

Total number of samples: 50 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes
Compare latency of primary with shadow system
Characteristics of the 50 highest latencies:
System rack4slot6s.osadl.org (updated Mon Jun 08, 2026 00:44:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
992123130,3sleep09922-21users22:55:300
3075621300,3sleep030758-21fgrep20:05:250
439321180,3sleep04392-21netstat22:35:200
3009621180,4chrt30092-21latency_hist22:10:020
569821150,4chrt5702-21entropy20:35:160
2402021030,4sleep024018-21ntp_states21:45:220
1632721010,4sleep016335-21memory19:10:170
252662870,3sleep025293-21ntp_states21:50:210
170972870,4sleep017146-21awk23:25:110
138022840,3sleep013815-21vmstat23:10:300
1599827219,30sleep016023-21munin-run19:10:020
16049996533,23cyclictest2108-21/usr/sbin/munin20:20:240
16049996034,17cyclictest16409-21/usr/sbin/munin21:15:260
16049996034,15cyclictest24903-21/usr/sbin/munin23:55:150
16049996033,16cyclictest28893-21/usr/sbin/munin00:10:180
16049996013,17cyclictest22307-21systemctl21:40:000
80462593,5sleep00-21swapper20:44:400
1604999599,17cyclictest31637-21/usr/sbin/munin20:10:250
1604999599,16cyclictest26295-21/usr/sbin/munin21:55:300
1604999598,17cyclictest4345-21/usr/sbin/munin20:30:230
16049995935,16cyclictest3210-21/usr/sbin/munin22:30:240
16049995934,16cyclictest7353-21/usr/sbin/munin22:45:300
16049995934,16cyclictest12505-21/usr/sbin/munin21:00:250
16049995934,15cyclictest30257-21/usr/sbin/munin00:15:200
16049995930,17cyclictest14680-21/usr/sbin/munin23:15:160
1604999589,17cyclictest30176-21/usr/sbin/munin22:10:270
1604999589,17cyclictest19849-21/usr/sbin/munin21:30:170
1604999589,16cyclictest21394-21fw_packets19:30:140
1604999588,16cyclictest23906-21/usr/sbin/munin19:40:240
1604999587,18cyclictest31728-21ntpq22:15:210
16049995833,15cyclictest22654-21/usr/sbin/munin23:45:250
16049995831,15cyclictest11042-21/usr/sbin/munin23:00:260
16049995822,11cyclictest23540-21/usr/sbin/munin23:50:250
16049995811,15cyclictest13384-21/usr/sbin/munin21:05:250
16049995810,15cyclictest17430-21/usr/sbin/munin19:15:130
16049995810,14cyclictest17568-21ntp_states21:20:220
1604999579,19cyclictest19226-21/usr/sbin/munin19:20:270
1604999579,16cyclictest26471-21/usr/sbin/munin19:50:150
1604999578,16cyclictest2854-21sort22:30:020
1604999578,16cyclictest22959-21/usr/sbin/munin21:40:280
1604999578,16cyclictest18453-21/usr/sbin/munin23:30:130
1604999578,14cyclictest456-21/usr/sbin/munin20:15:190
16049995733,15cyclictest18753-21/usr/sbin/munin21:25:170
16049995733,15cyclictest12153-21/usr/sbin/munin23:05:200
16049995732,16cyclictest19854-21/usr/sbin/munin23:35:180
16049995731,16cyclictest9029-21runrttasks20:47:100
16049995731,16cyclictest3125-21/usr/sbin/munin20:25:150
16049995710,15cyclictest26171-21sshd19:48:370
1604999569,17cyclictest17040-21date23:25:020
1604999569,14cyclictest22596-21/usr/sbin/munin19:35:230
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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