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2026-04-28 - 03:22

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 Mon Apr 27, 2026 12:45:12)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1656199541,43cyclictest6066-21ssh11:00:150
1657899520,49cyclictest3994-21apt-get11:35:152
1657899511,42cyclictest2565-21apt-get10:40:142
1657899501,43cyclictest0-21swapper/208:00:112
1657899491,42cyclictest25490-21apt-get12:05:132
1657899491,41cyclictest28046-21apt-get10:00:132
1657899491,41cyclictest11540-21apt-get10:45:122
1658999485,27cyclictest35966irq/58-eth009:30:133
1657899481,40cyclictest24067-21apt-get08:25:152
1657899470,40cyclictest0-21swapper/208:40:142
1657899461,40cyclictest0-21swapper/208:50:152
1657099461,4cyclictest131rcu_preempt09:25:121
1656199462,39cyclictest29202-21ssh12:25:100
1657899440,29cyclictest7200-21ls11:55:012
1657099443,33cyclictest8156-21ssh10:25:141
1657099443,29cyclictest2595-21ssh10:40:141
16570994416,18cyclictest21-21ksoftirqd/108:40:141
1656199447,31cyclictest131rcu_preempt10:00:140
1657899431,37cyclictest26005-21ssh10:35:142
1657899431,37cyclictest26005-21ssh10:35:132
1657899431,25cyclictest4576-21acpi10:05:142
1657899430,38cyclictest27541-21apt-get07:55:132
1657099433,32cyclictest10024-21ssh09:50:121
1657899422,36cyclictest0-21swapper/211:30:132
1657899421,37cyclictest0-21swapper/207:15:132
1657899421,36cyclictest22579-21apt-get10:15:132
1657899420,34cyclictest20128-21apt-get12:20:132
1657899420,29cyclictest2382-21diskmemload11:23:162
1657099421,31cyclictest22607-21ssh10:15:131
1656199423,36cyclictest23977-21ssh11:10:130
1658999417,26cyclictest35966irq/58-eth009:45:133
1656199414,35cyclictest20840-21ssh09:20:130
1657899401,33cyclictest18990-21apt-get09:55:112
1657099403,3cyclictest131rcu_preempt12:30:121
1657099403,3cyclictest131rcu_preempt12:30:111
1658999395,19cyclictest35966irq/58-eth011:05:123
1657899391,33cyclictest6340-21apt-get09:30:142
1657899391,32cyclictest20499-21ssh10:50:132
1657899391,22cyclictest0-21swapper/209:49:412
1657899390,34cyclictest0-21swapper/210:30:112
1657899390,34cyclictest0-21swapper/210:30:112
1657899390,24cyclictest29761-21apt-get09:25:132
16561993925,8cyclictest131rcu_preempt08:30:130
1656199391,34cyclictest14980-21ssh11:05:130
1657899381,33cyclictest0-21swapper/210:20:112
1657899381,32cyclictest0-21swapper/212:30:122
1657899381,32cyclictest0-21swapper/212:30:112
1657899380,35cyclictest0-21swapper/211:15:132
1657099383,24cyclictest11776-21ssh09:15:141
1658999374,20cyclictest35966irq/58-eth011:20:133
1657899371,32cyclictest14854-21ssh12:35:122
1657899370,34cyclictest21367-21ntp_192.168.11407:45:232
1657899370,33cyclictest28959-21proc_pri09:00:262
1657899370,21cyclictest0-21swapper/212:16:542
1657099371,28cyclictest26015-21ssh10:35:141
1657099371,28cyclictest26015-21ssh10:35:141
16561993723,5cyclictest12-21ksoftirqd/008:20:130
16578993619,10cyclictest27346irq/40-dwc2_hso12:25:122
1657899360,32cyclictest27895-21ssh11:46:492
1657899360,32cyclictest22771-21apt-get07:50:132
1657899360,28cyclictest6799-21/usr/sbin/munin07:30:202
1657899360,23cyclictest2382-21diskmemload10:27:472
1656199361,31cyclictest29775-21ssh09:25:120
1657899351,31cyclictest19471-21perl08:20:162
1657899351,31cyclictest13076-21munin-node07:40:112
1657899351,28cyclictest24377-21ssh09:40:152
1657899351,28cyclictest24377-21ssh09:40:142
1657899351,21cyclictest0-21swapper/209:39:422
1657899351,21cyclictest0-21swapper/208:10:012
1657899350,32cyclictest17217-21ntp_states10:10:252
1657899350,31cyclictest28941-21apt-get08:30:052
1657899350,31cyclictest0-21swapper/209:50:132
1657099351,28cyclictest7534-21sh11:55:131
1657899342,29cyclictest18190-21timerwakeupswit08:15:292
1657899341,29cyclictest31246-21/usr/sbin/munin07:25:172
1657899341,29cyclictest0-21swapper/208:55:142
1657899341,29cyclictest0-21swapper/208:55:132
1657899341,22cyclictest7640-21ssh12:11:202
1657899340,31cyclictest22124-21ssh11:08:152
1657899340,30cyclictest3169-21interrupts09:10:192
1657099344,19cyclictest21-21ksoftirqd/112:00:141
1657099343,27cyclictest11082-21ssh12:15:131
1657099343,25cyclictest11571-21ssh10:45:141
1656199343,22cyclictest24357-21ssh09:40:130
1656199343,22cyclictest24357-21ssh09:40:120
1658999338,15cyclictest35966irq/58-eth009:10:133
1657899335,25cyclictest1340-21sort08:35:112
1657899331,29cyclictest14124-21kthreadcore09:15:222
1657899331,28cyclictest11062-21ssh11:00:462
1657899331,28cyclictest0-21swapper/211:40:122
1657899330,30cyclictest14178-21/usr/sbin/munin08:10:312
1657899330,30cyclictest0-21swapper/208:45:142
1657899330,27cyclictest20810-21ssh09:20:132
1657899330,26cyclictest12807-21users07:35:322
1656199333,23cyclictest576-21ssh11:15:130
1658999322,15cyclictest35966irq/58-eth011:30:123
1657899321,28cyclictest7123-21cron11:55:012
1657899321,28cyclictest16701-21/usr/sbin/munin07:10:112
1657899320,28cyclictest30156-21ssh11:12:072
1656199322,14cyclictest131rcu_preempt07:50:120
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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