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2025-11-27 - 16:33

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 Thu Nov 27, 2025 12:44:46)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
819501830,0irq/47-4a10000015184-21lldpd07:08:090
144539911747,0cyclictest81850irq/46-4a10000012:30:020
144539911543,0cyclictest81850irq/46-4a10000012:07:520
144539911247,0cyclictest81850irq/46-4a10000009:46:400
14453999532,0cyclictest0-21swapper10:44:040
14453999428,0cyclictest0-21swapper10:50:080
81850810,0irq/46-4a10000023088-21seq09:57:560
81850790,0irq/46-4a1000006176-21ssh10:30:450
81850790,0irq/46-4a10000024699-21ssh10:01:170
81850780,0irq/46-4a10000017025-21seq09:44:570
81850770,0irq/46-4a10000016997-21ssh12:03:130
81850770,0irq/46-4a10000014372-21ssh10:48:250
81850760,0irq/46-4a1000008450-21ssh09:26:290
81850760,0irq/46-4a10000031033-21ssh12:33:180
81850750,0irq/46-4a10000031570-21ssh10:15:360
81850750,0irq/46-4a10000022422-21runrttasks11:05:160
81850740,0irq/46-4a10000032570-21ssh11:27:040
81850740,0irq/46-4a10000031552-21ssh11:25:000
81850740,0irq/46-4a10000020878-21kworker/u2:511:14:580
81850720,0irq/46-4a10000021140-21ssh12:12:030
81850720,0irq/46-4a1000001033-21kworker/u2:310:39:210
81850710,0irq/46-4a1000009972-21ssh11:48:130
81850710,0irq/46-4a1000008586-21kworker/u2:109:31:010
81850710,0irq/46-4a1000001206-21kworker/u2:709:21:090
81850700,0irq/46-4a1000007857-21ssh11:43:410
81850700,0irq/46-4a10000023985-21kworker/u2:510:05:320
81850690,0irq/46-4a10000024850-21kworker/u2:610:13:560
81850690,0irq/46-4a10000017782-21ssh10:55:340
81850680,0irq/46-4a10000032400-21kworker/u2:109:14:370
81850680,0irq/46-4a10000032149-21kworker/u2:110:28:250
81850680,0irq/46-4a10000020061-21kworker/u2:410:20:420
81850680,0irq/46-4a10000019762-21apt-get11:00:420
81850670,0irq/46-4a1000003636-21kworker/u2:009:18:460
81850670,0irq/46-4a10000010963-21kworker/u2:309:52:210
81850660,0irq/46-4a1000006088-21ssh11:40:000
81850660,0irq/46-4a10000011422-21kworker/u2:312:15:310
81850650,0irq/46-4a10000032380-21kworker/u2:011:32:470
81850650,0irq/46-4a10000022808-21kworker/u2:611:53:150
81850640,0irq/46-4a1000004509-21kworker/u2:207:25:190
101640,0ktimersoftd/0740-21ssh12:37:550
81850620,0irq/46-4a10000027431-21ssh11:16:060
81850610,0irq/46-4a1000000-21swapper07:57:190
81850590,0irq/46-4a10000015933-1kworker/u3:307:21:470
81850580,0irq/46-4a1000000-21swapper12:22:120
81850560,0irq/46-4a10000012940-21ssh09:36:070
14453995633,0cyclictest22463-21latency_hist07:59:550
14453995545,0cyclictest81850irq/46-4a10000011:55:540
14453995544,0cyclictest81850irq/46-4a10000007:41:080
14453995444,0cyclictest101ktimersoftd/008:33:410
101540,0ktimersoftd/00-21swapper07:34:390
14453995328,0cyclictest0-21swapper07:14:510
101530,0ktimersoftd/00-21swapper07:36:040
14453995241,0cyclictest81850irq/46-4a10000007:49:520
14453995240,0cyclictest81850irq/46-4a10000007:19:510
14453995040,0cyclictest81850irq/46-4a10000009:08:510
14453994934,0cyclictest31218-21runrttasks08:58:530
14453994931,0cyclictest15180-21lldpd08:19:110
14453994838,0cyclictest101ktimersoftd/008:49:560
14453994837,0cyclictest81850irq/46-4a10000008:59:560
14453994833,0cyclictest15201-21runrttasks08:37:190
14453994732,0cyclictest0-21swapper08:08:260
14453994730,0cyclictest28496-21wc08:39:560
14453994729,0cyclictest21750-21latency_hist07:54:530
14453994632,0cyclictest14451-21cyclictest08:29:140
14453994631,0cyclictest15032-21ntpd08:47:260
14453994631,0cyclictest14451-21cyclictest08:11:460
14453994328,0cyclictest25415-21cron08:19:560
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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