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2026-06-01 - 03:43

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 all highest latencies:
System rack4slot6s.osadl.org (updated Mon Jun 01, 2026 00:44:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2182222520,2sleep021819-21netstat00:35:190
413822190,3sleep04137-21latency_hist21:20:020
1788121280,4chrt17298-21/usr/sbin/munin20:05:310
818721260,4chrt8184-21ntpq23:40:210
3006721220,2sleep030065-21awk20:55:000
1991821220,4chrt19916-21df_inode20:15:130
2508821170,3chrt25089-21sh20:35:130
29859911523,13cyclictest1616-21/usr/sbin/munin21:10:240
1893821140,3chrt18936-21ls00:25:020
993621130,3chrt9940-21timerwakeupswit21:40:280
201792980,4sleep020239-21timerandwakeup22:20:270
72682870,3sleep07287-21/usr/sbin/munin19:25:260
98802760,3sleep09879-21wc19:35:240
178427519,32sleep01791-21egrep19:05:130
116442730,3sleep011697-21latency_hist23:55:010
2985996645,13cyclictest21474-21latency_hist00:35:010
2985996234,18cyclictest15391-21/usr/sbin/munin00:10:210
2985996211,16cyclictest21284-21ntp_states22:25:220
2985996121,15cyclictest44292chrt19:15:140
298599608,18cyclictest13071-21/usr/sbin/munin00:00:330
2985996036,15cyclictest394-21/usr/sbin/munin21:05:160
2985996034,16cyclictest16046-21/usr/sbin/munin20:00:120
2985995935,15cyclictest27679-21runrttasks20:45:150
2985995934,14cyclictest13926-21/usr/sbin/munin19:50:280
2985995910,15cyclictest13966-21sshd21:56:350
298599589,13cyclictest1424-21/usr/sbin/munin23:15:290
298599588,18cyclictest5505-21/usr/sbin/munin21:25:260
2985995834,15cyclictest4482-21/usr/sbin/munin21:20:200
2985995832,17cyclictest18960-21/usr/sbin/munin22:15:280
2985995832,16cyclictest5502-21/usr/sbin/munin23:30:170
2985995831,16cyclictest22327-21/usr/sbin/munin22:30:110
298599579,15cyclictest26155-21/usr/sbin/munin22:45:260
298599578,16cyclictest18579-21/usr/sbin/munin20:10:310
298599577,18cyclictest5687-21/usr/sbin/munin19:20:280
298599577,18cyclictest31492-21/usr/sbin/munin21:00:190
2985995734,14cyclictest416-21/usr/sbin/munin23:10:190
2985995733,15cyclictest11857-21/usr/sbin/munin23:55:150
2985995732,15cyclictest16146-21/usr/sbin/munin22:05:250
2985995731,15cyclictest16691-21/usr/sbin/munin00:15:260
2985995730,15cyclictest8296-21/usr/sbin/munin19:30:110
2985995728,18cyclictest21455-21/usr/sbin/munin20:20:220
2985995724,23cyclictest13291-21idleruntime-cro19:50:010
2985995723,26cyclictest30908-21runrttasks20:56:300
2985995711,19cyclictest10854-21memory21:45:190
2985995711,18cyclictest27489-21df22:50:140
2985995710,18cyclictest30220-21memory23:00:190
2985995710,14cyclictest24735-21awk22:40:000
298599569,20cyclictest9507-21/usr/sbin/munin23:45:240
298599569,18cyclictest15106-21systemctl19:55:250
298599568,15cyclictest6786-21/usr/sbin/munin21:30:160
2985995631,16cyclictest31466-21/usr/sbin/munin23:05:160
2985995630,16cyclictest26461-21/usr/sbin/munin20:40:160
2985995630,15cyclictest28771-21/usr/sbin/munin22:55:110
2985995629,16cyclictest22593-21/usr/sbin/munin20:25:160
2985995610,18cyclictest11287-21awk19:40:260
2985995610,16cyclictest3079-21/usr/sbin/munin19:10:280
298599559,18cyclictest6651-21df23:35:130
298599558,34cyclictest14544-21/usr/sbin/munin22:00:270
298599558,18cyclictest19004-21/usr/sbin/munin00:25:250
298599558,14cyclictest8120-21df21:35:110
298599557,15cyclictest25164-21ntp_states22:40:210
2985995530,15cyclictest23886-21runrttasks20:30:160
2985995510,16cyclictest17400-21ntp_states22:10:220
2985995510,16cyclictest12217-21ntpq21:50:190
298599549,31cyclictest4036-21/usr/sbin/munin23:25:150
2985995429,16cyclictest3828-21runrttasks23:24:240
2985995328,15cyclictest14408-21runrttasks00:05:350
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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