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2026-08-07 - 18:05

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 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 792 highest latencies:
System rack4slot6s.osadl.org (updated Fri Aug 07, 2026 12:44:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2336522400,3sleep023364-21grep10:40:260
1153421240,3chrt11535-21ntp_kernel_err09:55:200
1055621220,3chrt10005-21/usr/sbin/munin09:50:300
349821210,3chrt3500-21date09:25:020
1961521160,3chrt19616-21processes08:20:250
2444421150,3chrt24445-21sh08:40:110
1564221020,3sleep015646-21ntp_states08:05:260
890921010,4sleep08926-21/usr/sbin/munin09:45:190
255542966,10sleep025564-21forks10:50:140
9452940,5sleep0986-21/usr/sbin/munin11:20:180
85912880,2sleep08627-21grep09:45:010
204152860,3sleep020461-21if_eth010:30:140
180012846,65sleep018062-21/usr/sbin/munin12:25:270
292402826,64sleep029255-21/usr/sbin/munin11:05:010
115302820,3sleep011529-21wc12:00:240
88252816,63sleep08823-21ntp_states11:50:230
190452817,63sleep019054-21memory12:30:190
98727018,31sleep01012-21munin-run07:10:020
287882650,3sleep028790-21timerwakeupswit08:55:270
1038996123,13cyclictest2592-21ls07:15:170
1038996110,19cyclictest29381-21/usr/sbin/munin11:05:280
1038996036,16cyclictest14493-21/usr/sbin/munin10:05:320
1038996023,14cyclictest26248-21timerwakeupswit08:45:280
1038996010,20cyclictest16512-21df_inode10:15:150
103899599,17cyclictest4721-21munin-run09:29:590
103899598,19cyclictest13109-21grep10:00:280
103899598,18cyclictest23080-21/usr/sbin/munin08:35:210
1038995934,16cyclictest32207-21/usr/sbin/munin11:15:190
1038995911,16cyclictest1081-21/usr/sbin/munin09:15:120
1038995910,16cyclictest10177-21/usr/sbin/munin07:45:250
103899587,18cyclictest26774-21/usr/sbin/munin10:55:250
1038995834,15cyclictest4033-21/usr/sbin/munin07:20:220
1038995828,22cyclictest15579-21/usr/sbin/munin12:15:320
1038995810,17cyclictest32131-21/usr/sbin/munin09:10:270
1038995810,16cyclictest22789-21munin-run10:40:010
103899578,17cyclictest20798-21ntp_states08:25:230
103899578,15cyclictest16627-21/usr/sbin/munin08:10:180
103899578,15cyclictest11668-21/usr/sbin/munin07:50:180
103899577,17cyclictest30834-21/usr/sbin/munin09:05:180
1038995732,16cyclictest5953-21runrttasks11:40:040
1038995731,18cyclictest25194-21runrttasks10:48:400
1038995731,16cyclictest15054-21runrttasks08:03:430
1038995730,17cyclictest5029-21/usr/sbin/munin09:30:170
1038995717,13cyclictest18248-21switchtime10:20:250
103899569,18cyclictest20284-21/usr/sbin/munin12:35:140
103899569,18cyclictest13753-21df_inode12:10:120
103899569,16cyclictest30658-21/usr/sbin/munin11:10:140
103899569,16cyclictest12415-21/usr/sbin/munin12:05:130
103899569,15cyclictest6129-21/usr/sbin/munin09:35:170
103899568,17cyclictest7249-21/usr/sbin/munin11:45:260
103899568,16cyclictest5803-21cron11:40:010
103899568,14cyclictest2090-21/usr/sbin/munin11:25:180
103899567,16cyclictest1414-21ntp_offset07:10:190
103899559,14cyclictest12747-21/usr/sbin/munin07:55:280
103899557,18cyclictest114-21systemd-journal07:39:590
103899557,16cyclictest10982-21ls12:00:010
103899556,16cyclictest3375-21/usr/sbin/munin11:30:180
1038995532,14cyclictest27246-21runrttasks08:50:210
1038995531,16cyclictest29628-21/usr/sbin/munin09:00:130
1038995531,15cyclictest17970-21df08:15:130
1038995529,17cyclictest5079-21df07:25:130
1038995511,14cyclictest21846-21df08:30:120
103899547,16cyclictest19396-21ps10:25:250
103899539,16cyclictest17423-21seq12:24:500
1038995328,17cyclictest16172-21runrttasks10:13:490
1038995327,17cyclictest9641-21runrttasks07:41:390
1038995315,10cyclictest0-21swapper07:30:130
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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