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2026-05-20 - 15:43

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #7, slot #4

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 rack7slot4s.osadl.org (updated Wed May 20, 2026 12:45:14)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3601996038,14cyclictest27-21ksoftirqd/210:10:112
359399592,38cyclictest24117-21ssh10:05:121
359399592,38cyclictest24117-21ssh10:05:121
3601995815,7cyclictest131rcu_preempt07:40:122
3613995641,10cyclictest35966irq/58-eth011:10:133
3593995419,23cyclictest21-21ksoftirqd/107:50:131
3613995231,14cyclictest0-21swapper/309:20:113
3601995225,18cyclictest131rcu_preempt08:15:132
360199480,30cyclictest30780-21ssh12:15:112
361399477,21cyclictest35966irq/58-eth010:25:123
359399461,6cyclictest131rcu_preempt12:10:131
361399444,27cyclictest35966irq/58-eth009:55:123
361399444,27cyclictest35966irq/58-eth009:55:123
359399441,32cyclictest11439-21ssh11:10:131
361399435,23cyclictest35966irq/58-eth010:10:133
359399431,28cyclictest12868-21ssh12:05:121
361399391,23cyclictest35966irq/58-eth011:50:113
3601993921,7cyclictest27-21ksoftirqd/211:20:142
359399378,8cyclictest131rcu_preempt07:45:121
359399376,17cyclictest15119-21ssh10:00:131
359399374,22cyclictest2452-21ssh11:05:131
3593993721,10cyclictest3580-21cyclictest10:35:111
358899373,10cyclictest131rcu_preempt08:40:130
361399365,22cyclictest35966irq/58-eth011:55:133
358899364,29cyclictest20354-21ssh11:15:120
358899361,29cyclictest1839-21ssh12:35:120
361399353,23cyclictest35966irq/58-eth007:15:133
360199352,25cyclictest0-21swapper/207:25:142
3601993518,12cyclictest0-21swapper/212:05:132
360199351,26cyclictest0-21swapper/210:40:112
358899351,30cyclictest18291-21ssh11:50:120
360199341,24cyclictest7309-21ssh12:20:122
359399347,14cyclictest3768-21ssh12:00:131
359399342,18cyclictest27217-21diskmemload11:55:131
358899342,27cyclictest16782-21rm09:25:110
358899342,26cyclictest9377-21ssh11:45:120
360199332,22cyclictest27-21ksoftirqd/209:15:112
3601993313,5cyclictest17264-21fschecks_count09:05:162
359399332,21cyclictest27728-21ssh10:25:121
361399323,21cyclictest35966irq/58-eth011:05:133
3588993224,6cyclictest12-21ksoftirqd/012:20:120
358899321,24cyclictest8017-21ssh10:50:140
3613993112,9cyclictest35966irq/58-eth009:50:133
3613993112,9cyclictest35966irq/58-eth009:50:133
358899319,12cyclictest131rcu_preempt07:40:130
358899315,4cyclictest131rcu_preempt11:55:140
358899312,25cyclictest7847-21ssh09:20:120
3613993017,9cyclictest35966irq/58-eth010:40:113
361399301,20cyclictest35966irq/58-eth012:00:133
359399302,23cyclictest13261-21ssh09:58:191
359399302,23cyclictest13261-21ssh09:58:181
358899304,21cyclictest23897-21ssh11:35:140
3601992916,8cyclictest27-21ksoftirqd/209:58:192
3601992916,8cyclictest27-21ksoftirqd/209:58:182
3601992912,11cyclictest19715-21kthreadcore10:20:202
3588992916,11cyclictest12-21ksoftirqd/010:25:120
3588992913,9cyclictest131rcu_preempt09:55:120
3588992913,9cyclictest131rcu_preempt09:55:120
3588992910,2cyclictest131rcu_preempt08:25:140
361399287,10cyclictest0-21swapper/310:35:113
361399283,16cyclictest0-21swapper/309:41:113
360199281,6cyclictest19690-21unixbench_singl08:30:282
359399282,19cyclictest25343-21ssh12:30:141
359399282,19cyclictest25343-21ssh12:30:141
361399273,17cyclictest0-21swapper/309:18:113
361399273,16cyclictest0-21swapper/311:26:113
360199271,23cyclictest14903-21ssh11:30:122
360199271,19cyclictest0-21swapper/207:30:142
360199271,17cyclictest18279-21ssh11:50:112
360199270,17cyclictest27346irq/40-dwc2_hso09:35:142
359399272,19cyclictest16955-21sh09:41:111
359399272,19cyclictest11363-21sh11:26:111
359399272,16cyclictest30798-21sh12:15:121
359399271,18cyclictest4495-21ssh10:30:131
358899273,19cyclictest345-21sh11:40:130
358899273,16cyclictest12-21ksoftirqd/009:05:130
358899272,21cyclictest31191-21ssh09:15:120
360199264,18cyclictest5940-21ssh11:25:122
360199262,9cyclictest27764-21apt-get07:35:112
360199262,9cyclictest25814-21apt-get09:30:122
360199262,15cyclictest24216-21apt-get08:05:122
3601992620,4cyclictest27-21ksoftirqd/210:50:122
359399261,8cyclictest0-21swapper/108:25:141
3593992610,9cyclictest3580-21cyclictest08:00:121
358899264,3cyclictest131rcu_preempt07:45:120
358899263,17cyclictest14918-21ssh11:30:130
358899263,14cyclictest16938-21ssh10:55:130
358899263,14cyclictest12-21ksoftirqd/009:00:140
358899261,21cyclictest9668-21ssh10:15:130
361399253,14cyclictest0-21swapper/311:15:133
3613992510,9cyclictest35966irq/58-eth012:35:133
360199251,14cyclictest6017-21cat11:05:242
360199250,17cyclictest24331-21grep10:05:152
360199250,17cyclictest24331-21grep10:05:152
359399251,10cyclictest0-21swapper/110:55:211
358899253,4cyclictest131rcu_preempt07:20:130
3588992512,10cyclictest5675-21cron09:55:010
3588992512,10cyclictest5675-21cron09:55:010
361399242,10cyclictest0-21swapper/310:20:143
360199247,11cyclictest27-21ksoftirqd/211:15:252
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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