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2026-05-21 - 12:14

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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Click here to display the system's profile data or here to proceed to next system.
Click on a legend element to toggle display of that core, ctrl-click inverts display, shift-click enables all.

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 100 highest latencies:
System rack4slot6s.osadl.org (updated Thu May 21, 2026 00:44:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3230122490,2sleep032302-21/usr/sbin/munin23:20:130
1335522480,3sleep013353-21threads22:05:270
255422220,2sleep02555-21basename19:20:000
2092121250,2sleep020924-21sort20:30:170
541521240,4chrt5418-21latency19:30:150
2345721210,4chrt23452-21ntp_states22:45:210
781621160,2sleep07815-21pluginstate23:50:250
991621050,4sleep09943-21munin-run00:00:000
169022980,2sleep016905-21processes00:25:250
32448999770,17cyclictest4861-21chrt19:27:490
32448999770,15cyclictest15339-21idleruntime00:20:130
32448999768,16cyclictest6646-21ntp_kernel_err21:40:210
32448999768,16cyclictest3676-21df_inode23:35:130
32448999670,14cyclictest15643-21df_inode20:10:130
32448999664,18cyclictest16725-21/usr/sbin/munin22:20:140
32448999663,22cyclictest11761-21seq19:55:130
32448999566,19cyclictest17820-21/usr/sbin/munin00:30:130
32448999565,18cyclictest3797-21/usr/sbin/munin21:30:330
32448999465,18cyclictest24625-21/usr/sbin/munin20:45:290
32448999369,13cyclictest32537-21chrt19:10:060
32448999366,15cyclictest21822-21latency_hist22:40:010
32448999362,19cyclictest11739-21memory22:00:170
32448999268,14cyclictest31562-21seq23:15:570
32448999267,15cyclictest9756-21chrt21:52:050
32448999267,14cyclictest18364-21/usr/sbin/munin22:25:250
32448999265,14cyclictest22318-21mailstats22:40:250
32448999265,14cyclictest17158-21ntp_states20:15:210
32448999167,13cyclictest20309-21ls00:40:020
32448999167,12cyclictest15899-21switchtime22:15:250
32448999166,15cyclictest11469-21sed22:00:010
32448999166,13cyclictest27108-21runrttasks23:00:130
32448999165,15cyclictest13269-21runrttasks00:10:330
32448999165,14cyclictest19483-21runrttasks22:30:180
32448999161,18cyclictest13737-21runrttasks20:01:250
32448999158,19cyclictest288-21snmpd21:19:080
32448999158,17cyclictest28523-21memory23:05:190
32448999065,14cyclictest22473-21/usr/sbin/munin20:35:250
32448999063,14cyclictest26518-21chrt22:56:570
32448999062,17cyclictest946-21ntpd00:00:200
32448999061,16cyclictest24951-21grep22:50:250
32448999060,18cyclictest5080-21/usr/sbin/munin21:35:180
32448999059,17cyclictest13985-21/usr/sbin/munin00:15:100
32448999055,22cyclictest2331-21/usr/sbin/munin23:30:250
32448998866,12cyclictest5002-21/usr/sbin/munin23:40:140
32448998865,13cyclictest6956-21mailstats19:35:250
32448998864,12cyclictest7863-21memory21:45:170
32448998863,14cyclictest10972-21timerwakeupswit19:50:250
32448998765,12cyclictest1291-21df_inode21:20:130
32448998762,15cyclictest3709-21grep21:30:010
32448998761,14cyclictest18583-21awk20:20:250
32448998759,17cyclictest31088-21/usr/sbin/munin21:10:250
32448998751,22cyclictest11430-21df_inode00:05:130
32448998663,14cyclictest9427-21ntp_states19:45:210
32448998663,13cyclictest29856-21df_inode21:05:130
32448998661,13cyclictest2862-21latency19:20:170
32448998658,16cyclictest29904-21ntp_states23:10:210
32448998652,23cyclictest7901-21df19:40:120
32448998560,15cyclictest20577-21runrttasks20:29:410
32448998560,14cyclictest27381-21memory20:55:170
32448998558,15cyclictest26469-21timerwakeupswit20:50:260
32448998550,22cyclictest23631-21tr20:40:270
32448998548,23cyclictest6203-21/usr/sbin/munin23:45:150
32448998461,14cyclictest15431-21seq20:09:530
32448998453,19cyclictest1190-21irqstats23:25:150
32448998451,22cyclictest28766-21grep21:00:200
32448998451,21cyclictest14172-21df22:10:110
32448997957,12cyclictest32494-21latency_hist19:10:020
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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