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2026-06-25 - 21:22

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 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.

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 Jun 25, 2026 12:44:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
612921080,0sleep06093-21kworker/u2:207:07:140
734228620,0sleep07387-21cat07:15:050
118952815,0sleep011972-21latency_hist11:15:030
81950780,0irq/46-4a10000027031-21munin-run09:20:020
82050770,0irq/47-4a10000015490-21apt-get08:05:370
81950770,0irq/46-4a1000006689-21modprobe10:40:020
81950770,0irq/46-4a10000023099-21apt-get08:55:370
81950760,0irq/46-4a1000005738-21ls10:35:010
81950760,0irq/46-4a10000030021-21grep09:40:010
81950760,0irq/46-4a10000012086-21snmpd12:05:260
81950760,0irq/46-4a10000010826-21awk07:35:010
242762760,0sleep022418-21kworker/u2:612:34:300
82050750,0irq/47-4a10000021789-21seq12:19:030
81950750,0irq/46-4a1000008405-21apt07:20:010
81950750,0irq/46-4a10000017481-21runrttasks11:50:000
81950750,0irq/46-4a10000011137-21sed07:35:120
322372750,0sleep030323-21kworker/u2:509:55:020
175092750,0sleep017462-21kworker/u2:008:17:000
82050740,0irq/47-4a1000004883-21sshd10:29:110
82050740,0irq/47-4a10000024849-21sshd12:38:110
82050740,0irq/47-4a10000024289-21runrttasks09:01:020
82050740,0irq/47-4a10000015490-21apt-get08:05:030
82050740,0irq/47-4a10000012525-21apt07:45:000
81950740,0irq/46-4a1000008405-21apt-get07:20:340
91602730,0chrt3829-21kworker/u2:510:56:170
82050730,0irq/47-4a1000009633-21kworker/u2:007:29:200
81950730,0irq/46-4a10000015066-21apt-get11:35:030
4042730,0chrt32572-21kworker/u2:109:59:210
225752730,0chrt22418-21kworker/u2:612:22:370
212282730,0sleep021146-21kworker/u2:108:41:500
131612730,0chrt9948-21kworker/u2:611:21:390
82050720,0irq/47-4a10000023102-21munin-run08:55:030
82050720,0irq/47-4a10000019351-21sshd12:02:110
82050720,0irq/47-4a10000016736-21apt11:45:000
81950720,0irq/46-4a10000018660-21apt08:25:010
81950720,0irq/46-4a1000001532-21kworker/u2:010:15:010
31322720,0sleep01532-21kworker/u2:010:17:060
302052720,0chrt29545-21kworker/u2:009:40:390
262312720,0sleep021899-21kworker/u2:209:14:450
203332720,0chrt18246-21kworker/u2:408:35:470
186632720,0chrt18535-21kworker/u2:111:57:490
136982720,0chrt13195-21kworker/u2:311:25:050
114322720,0sleep09629-21kworker/u2:411:11:340
108212720,0sleep010701-21kworker/u2:111:07:350
103582720,0sleep09950-21kworker/u2:711:04:510
83432710,0chrt6268-21kworker/u2:210:50:390
81950710,0irq/46-4a1000004264-21latency_hist10:25:010
81950710,0irq/46-4a10000016589-21kworker/u2:108:14:390
81950710,0irq/46-4a10000015410-21runrttasks11:35:320
81950710,0irq/46-4a1000001532-21kworker/u2:010:10:010
79282710,0sleep06268-21kworker/u2:210:48:120
131192710,0chrt8044-21kworker/u2:407:48:590
82050700,0irq/47-4a10000027008-21kworker/u2:409:30:000
7112700,0sleep030323-21kworker/u2:510:00:370
312722700,0chrt29545-21kworker/u2:009:48:220
287892700,0chrt28048-21kworker/u2:109:31:170
251852700,0chrt22648-21kworker/u2:309:07:180
219992700,0sleep021899-21kworker/u2:208:47:090
196612700,0sleep018996-21kworker/u2:008:31:160
82050690,0irq/47-4a1000007048-1kworker/u3:110:45:000
82050690,0irq/47-4a10000020820-21sshd12:12:120
178862690,0sleep017783-21kworker/u2:311:52:290
137722690,0chrt13613-21kworker/u2:107:53:180
81950680,0irq/46-4a10000027295-21kworker/u2:609:25:000
188872680,0chrt14717-21kworker/u2:208:25:570
81950630,0irq/46-4a1000000-21swapper07:58:120
94750560,0irq/33-mmc017712-1kworker/0:0H12:26:110
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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