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2026-03-24 - 23:24

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 Tue Mar 24, 2026 12:45:13)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2944799571,2cyclictest0-21swapper/212:30:112
2944799511,46cyclictest0-21swapper/209:40:132
29457995019,19cyclictest28366irq/58-eth011:40:113
29447995026,17cyclictest0-21swapper/209:55:122
2944799493,43cyclictest22346irq/40-dwc2_hso07:45:122
2944799471,3cyclictest0-21swapper/208:20:142
2944799471,2cyclictest10500-21apt-get09:25:142
2944799471,2cyclictest0-21swapper/208:15:142
2942799472,7cyclictest131rcu_preempt09:45:140
29457994617,18cyclictest28366irq/58-eth010:35:143
2944799464,31cyclictest4236-21ssh11:45:122
2944799461,3cyclictest0-21swapper/208:25:132
2945799446,25cyclictest28366irq/58-eth011:55:133
2945799444,28cyclictest28366irq/58-eth012:10:133
2944799441,2cyclictest0-21swapper/210:30:132
2944799433,34cyclictest22346irq/40-dwc2_hso09:00:142
2944799423,35cyclictest1924-21apt-get07:15:142
2944799421,2cyclictest0-21swapper/212:05:122
2944799411,8cyclictest22699-21/usr/sbin/munin11:55:182
2944799411,6cyclictest18734-21kthreadcore09:10:232
2944799411,4cyclictest0-21swapper/211:25:152
29438994117,21cyclictest21-21ksoftirqd/110:25:121
29438994111,5cyclictest131rcu_preempt08:50:141
2945799403,22cyclictest28366irq/58-eth011:25:153
2944799402,7cyclictest0-21swapper/207:30:132
2944799402,2cyclictest0-21swapper/207:55:142
2944799402,2cyclictest0-21swapper/207:55:132
2944799401,4cyclictest0-21swapper/210:15:132
2944799401,4cyclictest0-21swapper/210:15:132
2944799401,3cyclictest0-21swapper/208:30:042
2944799401,28cyclictest0-21swapper/207:10:112
2943899402,27cyclictest17173-21ssh12:10:131
2945799394,22cyclictest28366irq/58-eth009:10:143
2945799391,23cyclictest28366irq/58-eth009:55:133
2944799393,28cyclictest9516-21ssh11:30:122
2944799392,6cyclictest0-21swapper/208:50:132
2944799391,6cyclictest29791-21grep11:05:192
2944799391,3cyclictest14823-21ntp_states10:55:272
2944799391,33cyclictest14842-21/usr/sbin/munin11:15:322
2944799390,5cyclictest11683-21sed12:25:012
2944799390,4cyclictest23146-21apt-get09:50:142
2942799398,4cyclictest131rcu_preempt08:00:130
2944799382,29cyclictest0-21swapper/211:50:082
2944799381,9cyclictest924-21snmpd10:38:472
2944799381,33cyclictest0-21swapper/208:00:122
2944799372,18cyclictest1119-21ssh12:35:242
2944799371,5cyclictest27555-21grep08:45:282
2944799371,3cyclictest0-21swapper/209:05:142
2944799371,33cyclictest16260-21missed_timers10:20:252
2944799371,32cyclictest20281-21fschecks_count11:00:172
2944799371,10cyclictest27162-21sendmail11:40:012
2944799363,2cyclictest19525-21apt-get09:30:142
2944799362,25cyclictest22344-21kthreadcore07:35:182
2944799362,17cyclictest0-21swapper/212:15:112
2944799361,32cyclictest14826-21irqstats08:35:182
2944799361,2cyclictest31419-21apt-get12:00:122
2944799360,5cyclictest5295-21kthreadcore10:50:242
2943899363,26cyclictest14189-21apt-get08:35:121
2945799354,19cyclictest28366irq/58-eth011:10:133
2944799352,3cyclictest0-21swapper/207:50:132
2944799352,3cyclictest0-21swapper/207:50:122
2944799351,7cyclictest14475-21sh09:45:162
2944799351,6cyclictest26317-21idleruntime07:40:162
2944799351,4cyclictest12372-21ntp_states10:00:272
2944799351,2cyclictest25412-21apt-get10:45:142
2944799350,6cyclictest11525-21sed07:25:022
2944799350,6cyclictest11525-21sed07:25:012
2942799356,4cyclictest12-21ksoftirqd/008:55:130
2942799351,4cyclictest131rcu_preempt09:00:140
2945799344,18cyclictest28366irq/58-eth011:20:113
2945799342,23cyclictest28366irq/58-eth010:05:143
2944799341,4cyclictest25647-21threads10:25:292
2944799341,3cyclictest0-21swapper/210:14:562
2944799341,2cyclictest0-21swapper/209:15:142
2944799341,2cyclictest0-21swapper/209:15:132
2944799340,6cyclictest17910-21ssh12:26:522
2945799334,16cyclictest28366irq/58-eth007:55:143
2945799334,16cyclictest28366irq/58-eth007:55:133
2944799333,26cyclictest5772-21munin-node11:10:132
2944799331,5cyclictest1433-21ssh09:20:092
2944799331,4cyclictest17162-21apt-get12:10:142
2944799331,2cyclictest0-21swapper/211:20:122
2944799331,2cyclictest0-21swapper/210:41:162
2944799330,5cyclictest22422-21latency_hist08:10:012
2945799321,18cyclictest28366irq/58-eth011:15:143
2944799326,23cyclictest18202-21cut10:05:172
2944799321,8cyclictest28525-21ssh09:35:072
2944799321,6cyclictest21860-21kthreadcore08:40:212
2944799320,4cyclictest29894-21grep11:40:182
2945799310,17cyclictest28366irq/58-eth012:20:133
2944799310,6cyclictest12231-21kernelversion07:25:182
2944799310,3cyclictest1062-21apt-get08:55:152
2942799315,23cyclictest13282-21ssh11:50:110
2945799302,16cyclictest28366irq/58-eth010:40:123
2944799309,19cyclictest22504-21/usr/sbin/munin08:10:172
2945799294,14cyclictest28366irq/58-eth012:35:123
2942799294,6cyclictest12-21ksoftirqd/012:30:110
2942799291,20cyclictest22346-21ssh11:55:140
2945799283,16cyclictest0-21swapper/312:25:233
2945799271,17cyclictest0-21swapper/310:50:143
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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