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2025-11-19 - 08:47

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #9, slot #8

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 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.

Total number of samples: 50 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 highest latencies:
System rack9slot8s.osadl.org (updated Wed Nov 19, 2025 00:44:46)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
818502050,0irq/46-4a1000002676-21kworker/0:019:05:450
81950910,0irq/47-4a10000032619-21kworker/u2:121:31:570
81850870,0irq/46-4a10000019626-21seq22:07:490
81950860,0irq/47-4a10000025330-21kworker/u2:621:51:390
81850850,0irq/46-4a1000008895-21runrttasks00:02:330
81850850,0irq/46-4a100000417-21ssh22:35:570
81950840,0irq/47-4a10000028517-21ssh22:26:380
81950840,0irq/47-4a10000015184-21lldpd23:29:590
81850840,0irq/46-4a1000002530-21ssh23:49:100
81950830,0irq/47-4a1000008597-21rm22:53:250
81950830,0irq/47-4a10000017934-21ssh23:13:070
81850830,0irq/46-4a1000009732-21ssh22:55:420
81850830,0irq/46-4a1000004117-21ssh23:52:280
81850830,0irq/46-4a10000021444-21ssh22:11:420
81850830,0irq/46-4a10000014002-21apt-get23:05:490
81950820,0irq/47-4a1000008532-21munin-run19:24:520
81950820,0irq/47-4a10000031749-21ssh23:42:160
81950820,0irq/47-4a10000030558-21ssh21:22:340
81950820,0irq/47-4a10000023024-21sendmail-msp20:59:550
81950820,0irq/47-4a10000021151-21munin-run23:20:010
81950820,0irq/47-4a10000010763-21sendmail-msp19:39:530
81850820,0irq/46-4a10000024585-21ssh00:35:370
81850820,0irq/46-4a10000020981-21ssh00:28:050
81850820,0irq/46-4a10000016578-21ssh00:18:510
81850820,0irq/46-4a10000014019-21ssh23:04:590
81950810,0irq/47-4a1000007644-21apt23:59:590
81950810,0irq/47-4a1000006386-21ssh21:39:590
81950810,0irq/47-4a10000030050-21ssh22:29:590
81950810,0irq/47-4a10000028264-21ssh23:34:590
81950810,0irq/47-4a10000021138-21kworker/u2:021:19:590
81950810,0irq/47-4a10000018178-21munin-run22:04:570
81950810,0irq/47-4a10000014515-21rm00:14:330
81850810,0irq/46-4a1000005677-21ssh21:38:350
81850810,0irq/46-4a10000021650-21ssh23:20:500
81950800,0irq/47-4a10000022257-21munin-run20:54:550
81950800,0irq/47-4a10000019503-21munin-run00:25:020
81950800,0irq/47-4a10000013486-21kworker/u2:520:00:030
81950800,0irq/47-4a10000011004-21ssh00:06:580
81850800,0irq/46-4a10000032760-21ssh21:27:140
81850800,0irq/46-4a10000026076-21ssh22:21:330
81850800,0irq/46-4a10000010568-21ssh21:48:540
123472800,0chrt10266-21kworker/u2:319:50:020
81950790,0irq/47-4a1000007571-21sshd19:18:240
81950790,0irq/47-4a10000025931-21ssh21:12:530
81950790,0irq/47-4a10000022508-21ssh00:31:150
81950790,0irq/47-4a10000013855-21ssh21:55:420
81950790,0irq/47-4a10000013352-21runrttasks19:55:380
81850790,0irq/46-4a1000003286-21ssh22:42:020
81850790,0irq/46-4a10000023689-21ssh22:16:310
242202790,0chrt24034-21kworker/u2:121:07:530
81950780,0irq/47-4a10000029783-21ssh23:38:110
81950780,0irq/47-4a10000018339-21runrttasks20:28:150
170302780,0chrt16586-21kworker/u2:320:19:450
95712770,0sleep09519-21kworker/u2:219:31:310
81950770,0irq/47-4a10000022980-21kworker/u2:421:04:550
81950770,0irq/47-4a10000021520-21apt20:49:550
81850770,0irq/46-4a1000004961-21ssh22:45:330
81850770,0irq/46-4a10000019804-21runrttasks20:38:130
60852770,0sleep03168-21kworker/u2:319:10:440
204932770,0chrt11792-21kworker/u2:420:42:370
111042770,0sleep010266-21kworker/u2:319:41:510
81950760,0irq/47-4a10000015700-21runrttasks20:09:560
174812760,0sleep016586-21kworker/u2:320:22:140
189112750,0sleep018120-21kworker/u2:620:31:550
119982740,0sleep011792-21kworker/u2:419:48:110
81950730,0irq/47-4a1000008698-21sshd19:25:230
101660,0ktimersoftd/015040-21chrt20:05:320
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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