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2026-03-21 - 17:17

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #7, slot #7

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.
Unexpectedly long latencies may be caused by SMIs
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rack7slot7s.osadl.org (updated Sat Mar 21, 2026 12:43:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
394929481,9sleep00-21swapper/007:05:450
310729371,16sleep20-21swapper/207:05:202
398928263,15sleep30-21swapper/307:06:173
424528060,16sleep10-21swapper/107:09:361
177872480,0sleep30-21swapper/312:14:483
436999280,24cyclictest0-21swapper/209:51:032
4369992724,2cyclictest94-21kswapd009:35:022
436999260,26cyclictest0-21swapper/209:40:412
436999250,25cyclictest0-21swapper/210:01:182
436999250,23cyclictest0-21swapper/211:45:342
3552240,1sleep1241rcuc/112:04:081
286962240,0sleep30-21swapper/310:05:403
436999230,21cyclictest0-21swapper/209:16:012
436699230,22cyclictest0-21swapper/108:05:261
436699230,21cyclictest0-21swapper/111:35:141
437199220,0cyclictest141rcu_preempt09:16:393
437199220,0cyclictest0-21swapper/311:40:153
436999220,19cyclictest0-21swapper/212:00:062
4366992215,3cyclictest11040-21ssh12:29:511
4366992215,3cyclictest11040-21ssh12:29:501
4369992120,1cyclictest0-21swapper/210:38:512
436999200,18cyclictest0-21swapper/212:15:162
436299207,3cyclictest141rcu_preempt09:35:000
436299205,14cyclictest0-21swapper/011:05:150
436299200,3cyclictest0-21swapper/011:45:120
48812190,0sleep20-21swapper/212:25:252
48812190,0sleep20-21swapper/212:25:242
437199190,3cyclictest0-21swapper/311:38:513
436999190,1cyclictest0-21swapper/212:38:322
436999190,19cyclictest0-21swapper/211:58:012
4366991919,0cyclictest0-21swapper/110:00:381
436999180,18cyclictest0-21swapper/211:05:162
436999180,17cyclictest0-21swapper/209:33:162
436999180,13cyclictest0-21swapper/211:00:392
436699181,1cyclictest29781-21diskmemload11:13:441
436699180,18cyclictest0-21swapper/110:18:001
4371991715,1cyclictest39-21ksoftirqd/312:39:023
4371991715,1cyclictest39-21ksoftirqd/310:49:263
4371991714,2cyclictest0-21swapper/310:04:213
437199170,14cyclictest0-21swapper/312:31:263
4369991717,0cyclictest0-21swapper/210:58:072
436999170,17cyclictest0-21swapper/210:23:112
436999170,16cyclictest0-21swapper/209:58:172
4366991715,1cyclictest22071-21apt-get11:00:121
436699171,15cyclictest29781-21diskmemload09:33:581
436699171,15cyclictest29781-21diskmemload09:10:391
436699171,15cyclictest0-21swapper/108:45:141
436699170,2cyclictest0-21swapper/109:18:451
436699170,14cyclictest0-21swapper/110:05:131
437199163,9cyclictest39-21ksoftirqd/311:06:593
437199161,1cyclictest141rcu_preempt09:45:453
4371991610,5cyclictest39-21ksoftirqd/307:30:273
437199160,15cyclictest0-21swapper/308:35:143
4369991616,0cyclictest0-21swapper/209:24:102
4369991614,2cyclictest4356-21cyclictest07:10:262
436999160,16cyclictest0-21swapper/211:33:562
436999160,16cyclictest0-21swapper/210:45:292
436999160,16cyclictest0-21swapper/210:15:392
4366991614,2cyclictest0-21swapper/110:48:051
4366991612,2cyclictest19884-21taskset12:35:001
436699161,1cyclictest4740-21/usr/sbin/munin08:15:211
4366991611,4cyclictest25-21ksoftirqd/110:50:241
436699160,1cyclictest0-21swapper/109:58:071
436699160,1cyclictest0-21swapper/109:50:361
436299160,3cyclictest0-21swapper/011:39:180
437199150,0cyclictest0-21swapper/309:51:033
436999151,1cyclictest141rcu_preempt08:35:202
436999150,15cyclictest0-21swapper/211:43:192
4366991514,1cyclictest0-21swapper/111:40:531
436699150,1cyclictest0-21swapper/112:17:521
436699150,15cyclictest0-21swapper/109:28:511
436299155,5cyclictest0-21swapper/010:55:140
4362991514,1cyclictest0-21swapper/011:55:500
4362991510,3cyclictest24041-21sed11:00:250
276742150,0sleep30-21swapper/311:22:093
437199149,3cyclictest15541-21grep08:40:153
437199145,1cyclictest9014-21apt-get11:50:133
437199142,1cyclictest141rcu_preempt11:27:223
4371991411,2cyclictest5706-21grep10:30:263
4371991410,3cyclictest8190-21grep08:25:143
437199140,1cyclictest0-21swapper/311:56:473
436999146,7cyclictest23787-21apache210:06:132
436999144,6cyclictest14289-21apt-get07:30:032
436999140,12cyclictest17470-21grep07:35:142
436699142,1cyclictest23977-21ssh11:58:511
436699140,1cyclictest0-21swapper/111:47:141
436699140,13cyclictest26003-21cron07:55:001
4362991411,2cyclictest23995-21head09:25:180
437199139,3cyclictest8080-21head07:15:203
4371991313,0cyclictest0-21swapper/310:13:353
4371991310,2cyclictest537-21snmpd09:14:093
4371991310,2cyclictest4516-21grep12:25:203
4371991310,2cyclictest4516-21grep12:25:203
4371991310,2cyclictest32028-21cut09:30:163
4371991310,2cyclictest28406-21sleep08:00:013
4371991310,2cyclictest25607-21head07:50:283
4371991310,2cyclictest19725-21grep10:20:163
4371991310,2cyclictest18985-21grep08:45:203
4371991310,2cyclictest15583-21head09:20:163
4371991310,2cyclictest11152-21chrt07:20:553
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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