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2026-03-26 - 03:37

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 792 highest latencies:
System rack4slot6s.osadl.org (updated Thu Mar 26, 2026 00:44:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3175321140,4sleep031761-21df23:20:110
1640621140,3sleep016410-21df20:15:130
1279321130,2sleep012794-21cut22:05:250
321921120,3chrt3220-21latency_hist21:30:000
2580621090,5chrt25807-21expr20:50:250
900721020,4sleep08444-21/usr/sbin/munin21:50:280
48652920,4sleep04885-21/usr/sbin/munin21:35:240
309962874,9sleep030388-21/usr/sbin/munin23:15:290
197422866,68sleep019761-21idleruntime-cro00:40:000
215842790,3sleep021583-21wc22:40:230
3073927119,30sleep030788-21df19:05:110
123082690,2sleep012307-21latency00:10:170
31939996632,25cyclictest27003-21/usr/sbin/munin23:00:260
46252640,3sleep04627-21munin-run19:30:000
31939996111,19cyclictest8904-21ntp_states19:45:200
31939996110,18cyclictest4871-21if_eth019:30:150
31939996110,16cyclictest25511-21ntpq22:55:210
3193999608,24cyclictest3176-21/usr/sbin/munin23:35:130
3193999599,17cyclictest713-21/usr/sbin/munin21:20:190
31939995935,15cyclictest29623-21/usr/sbin/munin21:05:240
31939995934,16cyclictest18842-21runrttasks22:30:120
31939995933,16cyclictest22739-21/usr/sbin/munin22:45:150
31939995910,16cyclictest11576-21chrt00:06:240
31939995910,15cyclictest23940-21/usr/sbin/munin22:50:190
103392590,2sleep010340-21vmstat21:55:310
3193999589,17cyclictest7386-21/usr/sbin/munin23:50:250
3193999589,16cyclictest4413-21/usr/sbin/munin23:40:110
3193999589,16cyclictest20066-21/usr/sbin/munin22:35:170
3193999589,15cyclictest5880-21/usr/sbin/munin21:40:120
3193999588,17cyclictest22694-21munin-run20:40:000
3193999588,17cyclictest14896-21/usr/sbin/munin22:15:190
3193999588,17cyclictest13614-21/usr/sbin/munin22:10:260
31939995833,16cyclictest3643-21/usr/sbin/munin21:30:240
3193999579,15cyclictest1-21systemd19:35:250
3193999578,14cyclictest1819-21/usr/sbin/munin23:30:270
3193999577,16cyclictest17317-21/usr/sbin/munin00:30:270
31939995733,17cyclictest8401-21/usr/sbin/munin23:55:150
31939995731,16cyclictest16102-21/usr/sbin/munin00:25:140
31939995730,17cyclictest15186-21/usr/sbin/munin00:20:260
31939995730,17cyclictest12218-21runrttasks22:05:000
31939995710,16cyclictest29293-21memory23:10:170
31939995710,16cyclictest27288-21/usr/sbin/munin20:55:300
3193999568,15cyclictest16211-21/usr/sbin/munin22:20:220
3193999568,14cyclictest12400-21latency_hist20:00:010
3193999567,20cyclictest598-21/usr/sbin/munin23:25:140
31939995634,14cyclictest10159-21/usr/sbin/munin19:50:190
31939995632,14cyclictest28318-21/usr/sbin/munin21:00:230
31939995631,15cyclictest7247-21/usr/sbin/munin21:45:140
31939995630,15cyclictest32163-21/usr/sbin/munin21:15:240
31939995628,16cyclictest7748-21/usr/sbin/munin19:40:250
31939995626,18cyclictest0-21swapper20:25:110
3193999559,15cyclictest15071-21/usr/sbin/munin20:10:270
3193999558,15cyclictest5981-21ntp_states23:45:220
3193999558,15cyclictest24112-21/usr/sbin/munin20:45:180
3193999558,15cyclictest114-21systemd-journal00:20:010
3193999558,13cyclictest209222sleep020:31:060
3193999557,16cyclictest17497-21/usr/sbin/munin22:25:240
3193999557,14cyclictest27875-21df23:05:120
3193999557,14cyclictest2040-21run-parts19:20:000
31939995531,16cyclictest10270-21runrttasks00:01:120
31939995528,16cyclictest32217-21/usr/sbin/munin19:10:170
3193999548,16cyclictest12584-21sort20:00:150
3193999548,15cyclictest31530-21sshd21:13:240
3193999547,16cyclictest114-21systemd-journal20:42:230
31939995430,16cyclictest14926-21runrttasks20:09:550
31939995429,17cyclictest2172-21runrttasks19:20:070
31939995330,15cyclictest17817-21/usr/sbin/munin20:20:160
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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