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2026-01-03 - 09:03

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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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 Sat Jan 03, 2026 00:44:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1809721390,3sleep018098-21/usr/sbin/munin19:30:110
2829121180,4chrt28292-21/usr/sbin/munin00:20:180
2475221040,3chrt24750-21wc19:55:180
3087721030,2sleep030880-21sendmail20:20:000
2052221030,3chrt20521-21grep21:45:110
730821020,4sleep07364-21latency_hist23:00:010
2298821020,3sleep023019-21/usr/sbin/munin00:00:150
2250821020,4sleep022565-21users19:45:300
79042956,10sleep07572-21/usr/sbin/munin20:55:270
309112950,2sleep031001-21latency_hist20:20:030
280362950,3sleep028035-21sort00:20:030
168112920,2sleep016810-21processes23:35:250
318382885,10sleep031828-21latency_hist00:35:020
294482860,4sleep029487-21latency_hist22:20:030
140872860,3sleep014089-21idleruntime-cro19:15:000
260382830,4sleep026050-21missed_timers20:00:200
223142805,64sleep0288-21snmpd23:56:190
91722776,59sleep09177-21ntp_states21:00:230
128592755,57sleep012603-21/usr/sbin/munin23:20:220
10192753,5sleep00-21swapper22:35:150
1273427419,31sleep012735-21sshd19:09:390
5762687,12sleep01-21systemd22:33:010
12826996129,22cyclictest26505-21runrttasks22:07:170
12826996110,17cyclictest6375-21/usr/sbin/munin20:50:150
1282699608,17cyclictest8717-21/usr/sbin/munin23:05:110
12826996036,15cyclictest2397-21/usr/sbin/munin22:40:160
12826996012,17cyclictest20918-21/usr/sbin/munin23:50:280
1282699599,16cyclictest24390-21/usr/sbin/munin22:00:260
1282699598,20cyclictest658-21seq00:40:000
12826995935,16cyclictest23221-21/usr/sbin/munin21:55:140
12826995932,16cyclictest13739-21runrttasks21:18:350
12826995911,16cyclictest18435-21/usr/sbin/munin21:35:270
1282699589,16cyclictest23258-21/usr/sbin/munin19:50:170
1282699589,15cyclictest2413-21/usr/sbin/munin20:35:310
1282699588,18cyclictest26959-21/usr/sbin/munin22:10:240
1282699587,15cyclictest17763-21/usr/sbin/munin23:40:260
12826995835,15cyclictest14471-21/usr/sbin/munin19:15:210
12826995833,16cyclictest19283-21/usr/sbin/munin21:40:110
12826995832,17cyclictest21254-21/usr/sbin/munin19:40:270
1282699578,18cyclictest16639-21/usr/sbin/munin21:30:170
1282699577,18cyclictest25501-21/usr/sbin/munin00:10:180
1282699577,18cyclictest21798-21/usr/sbin/munin21:50:280
12826995734,15cyclictest5146-21/usr/sbin/munin22:50:230
12826995732,16cyclictest3598-21/usr/sbin/munin22:45:110
12826995732,16cyclictest24891-21runrttasks00:06:050
12826995732,15cyclictest19123-21/usr/sbin/munin23:45:140
1282699569,16cyclictest3718-21/usr/sbin/munin20:40:270
1282699569,15cyclictest11284-21/usr/sbin/munin23:15:270
1282699567,18cyclictest10179-21/usr/sbin/munin21:05:300
1282699567,15cyclictest19380-21/usr/sbin/munin19:35:280
1282699567,15cyclictest16810-21/usr/sbin/munin19:25:270
1282699567,15cyclictest13891-21/usr/sbin/munin23:25:130
1282699567,14cyclictest15359-21/usr/sbin/munin21:25:220
12826995634,15cyclictest5061-21runrttasks20:45:130
12826995632,15cyclictest30893-21/usr/sbin/munin22:25:120
12826995631,15cyclictest28615-21/usr/sbin/munin20:10:210
12826995630,16cyclictest2024-21runrttasks20:32:530
1282699558,15cyclictest15222-21/usr/sbin/munin23:30:120
12826995533,14cyclictest28057-21runrttasks20:08:040
12826995532,14cyclictest10041-21/usr/sbin/munin23:10:110
1282699549,14cyclictest325822chrt20:25:210
1282699547,16cyclictest29759-21memory22:20:190
1282699547,16cyclictest11465-21/usr/sbin/munin21:10:240
12826995430,16cyclictest14361-21ntp_states21:20:210
12826995430,15cyclictest7740-21/usr/sbin/munin23:00:230
12826995430,15cyclictest29424-21/usr/sbin/munin00:25:100
12826995430,15cyclictest15609-21/usr/sbin/munin19:20:160
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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