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2026-08-07 - 16:12

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 Fri Aug 07, 2026 12:45:13)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
9882997017,9cyclictest131rcu_preempt11:15:131
9882997017,9cyclictest131rcu_preempt11:15:121
9882996711,12cyclictest131rcu_preempt11:10:121
989399581,35cyclictest0-21swapper/208:30:142
987399573,11cyclictest131rcu_preempt12:00:120
987399565,47cyclictest31712-21ssh12:30:130
987399552,39cyclictest4747-21ssh09:15:110
988299491,36cyclictest9913-21ssh10:30:121
987399493,36cyclictest20616-21ssh10:00:130
990299464,25cyclictest35966irq/58-eth011:15:133
990299464,25cyclictest35966irq/58-eth011:15:123
987399451,33cyclictest8202-21ssh09:35:150
987399441,37cyclictest6305-21ssh10:10:120
9873994413,17cyclictest12-21ksoftirqd/007:10:120
988299431,35cyclictest13704-21ssh09:20:131
987399434,29cyclictest11922-21ssh11:25:140
989399409,18cyclictest27-21ksoftirqd/211:20:142
989399409,18cyclictest27-21ksoftirqd/211:20:132
9893994029,2cyclictest22673-21sh09:25:122
9882994010,22cyclictest21-21ksoftirqd/110:45:111
987399404,30cyclictest0-21swapper/011:45:150
9873993920,14cyclictest628-21tcf-agent11:00:120
990299382,25cyclictest35966irq/58-eth007:50:123
987399381,28cyclictest28256-21ssh09:10:150
987399381,28cyclictest28256-21ssh09:10:140
9902993621,9cyclictest0-21swapper/312:15:133
989399362,18cyclictest15891-21ssh10:31:482
988299366,19cyclictest26097-21ssh09:45:131
988299362,7cyclictest131rcu_preempt09:00:131
987399361,9cyclictest26253-21apt-get11:15:140
987399361,9cyclictest26253-21apt-get11:15:130
9873993611,22cyclictest26300-21kthreadcore10:20:210
988299352,25cyclictest912-21ssh10:25:151
987399351,9cyclictest29255-21tr08:35:220
987399351,9cyclictest22104-21fschecks_count08:30:160
987399351,8cyclictest4464-21ssh09:50:230
987399351,8cyclictest4464-21ssh09:50:220
987399351,10cyclictest9518-21tr08:50:190
987399351,10cyclictest28655-21kthreadcore09:45:220
990299340,17cyclictest35966irq/58-eth010:05:143
987399343,23cyclictest28088-21ssh10:40:150
987399342,25cyclictest19115-21ssh12:05:120
987399342,10cyclictest5205-21irqcore12:15:200
987399341,9cyclictest19562-21irqrtprio10:35:190
987399341,9cyclictest19562-21irqrtprio10:35:180
987399341,9cyclictest15058-21grep07:45:270
987399341,9cyclictest13013-21kthreadcore10:30:220
987399341,9cyclictest10272-21kthreadcore08:15:230
987399341,8cyclictest10406-21kthreadcore12:35:200
9873993417,10cyclictest29532-21sh12:27:520
987399341,11cyclictest3565-21cut11:55:230
987399341,10cyclictest20451-21cut07:20:200
987399340,10cyclictest10110-21kthreadcore11:05:220
9902993325,6cyclictest0-21swapper/312:20:133
9902993318,11cyclictest35966irq/58-eth012:35:143
9893993322,9cyclictest20596-21ssh10:00:122
988299335,10cyclictest21-21ksoftirqd/110:20:121
9882993317,10cyclictest9865-21cyclictest09:55:121
9882993314,15cyclictest131rcu_preempt07:55:151
987399332,8cyclictest612-21unixbench_singl07:30:300
987399331,9cyclictest14064-21irqcore08:55:160
987399331,8cyclictest8645-21tr07:40:200
987399331,8cyclictest25310-21kthreadcore11:50:190
987399331,8cyclictest19487-21tr08:25:220
987399331,8cyclictest12671-21ssh09:55:200
987399331,10cyclictest24619-21fschecks_time07:25:160
987399331,10cyclictest22856-21tr11:30:210
987399330,9cyclictest25711-21kthreadcore10:55:230
988299322,6cyclictest21-21ksoftirqd/109:50:151
988299322,6cyclictest21-21ksoftirqd/109:50:141
987399325,8cyclictest25588-21apt-get08:00:110
987399325,24cyclictest29893-21ssh11:35:130
987399325,20cyclictest6456-21ssh11:40:130
987399323,6cyclictest31337-21kthreadcore08:05:240
987399323,6cyclictest16982-21latency_hist08:25:010
987399322,10cyclictest17534-21ssh09:20:270
987399321,9cyclictest4795-21ssh10:45:150
987399321,8cyclictest26516-21find09:25:280
987399321,11cyclictest18579-21kthreadcore09:40:190
987399320,10cyclictest20756-21sort11:10:210
990299312,18cyclictest35966irq/58-eth010:45:123
987399315,5cyclictest18201-21needreboot07:15:230
987399312,9cyclictest3729-21latency_hist08:45:020
987399312,9cyclictest29884-21diskstats10:05:170
987399312,8cyclictest16303-21irqcore07:50:160
987399311,9cyclictest31596-21ssh09:30:100
987399311,7cyclictest15686-21if_eth110:15:190
9873993112,16cyclictest2808-21/usr/sbin/munin11:20:150
9873993112,16cyclictest2808-21/usr/sbin/munin11:20:140
989399303,20cyclictest0-21swapper/210:45:142
9882993012,8cyclictest0-21swapper/108:40:261
987399301,9cyclictest4591-21ntp_states10:25:250
987399301,9cyclictest3947-21acpi08:45:110
987399301,9cyclictest1721-21fschecks_time07:35:160
987399301,8cyclictest9865-21cyclictest07:10:010
987399301,7cyclictest17482-21ntp_states12:20:270
989399294,15cyclictest27346irq/40-dwc2_hso09:05:102
9893992918,3cyclictest27835-21diskmemload09:40:262
9893992916,10cyclictest29448-21sshd10:20:472
989399291,21cyclictest27-21ksoftirqd/210:19:482
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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