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2025-11-23 - 22:40

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 792 highest latencies:
System rack9slot8s.osadl.org (updated Sun Nov 23, 2025 12:44:46)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
818501760,0irq/46-4a1000005231-21kworker/0:007:05:140
81850870,0irq/46-4a10000020328-21sed12:25:030
81950850,0irq/47-4a1000001863-21sshd09:28:040
81850850,0irq/46-4a1000002867-21ssh10:39:060
81950830,0irq/47-4a10000019195-21ssh10:04:570
81950820,0irq/47-4a10000029395-21ssh10:26:330
81950820,0irq/47-4a10000023485-21sshd10:14:060
81850820,0irq/46-4a1000001707-21ssh11:45:220
81950810,0irq/47-4a1000007832-21ssh09:40:260
81950810,0irq/47-4a10000022915-21sshd08:51:010
81950810,0irq/47-4a10000021746-21awk08:44:540
81950810,0irq/47-4a10000016842-21run-parts09:59:570
81850810,0irq/46-4a10000017001-21ssh11:09:080
81950800,0irq/47-4a1000006816-21kworker/u2:111:59:050
81950800,0irq/47-4a10000010171-21ssh10:54:350
81850800,0irq/46-4a1000007366-21apt-get09:39:570
81850800,0irq/46-4a10000028546-21ssh10:24:540
81850800,0irq/46-4a10000014072-21ssh09:54:040
81850800,0irq/46-4a10000010673-21ssh12:04:410
81950790,0irq/47-4a1000003634-21apt-config10:40:120
81950790,0irq/47-4a10000012063-21cron07:39:520
81850790,0irq/46-4a10000029667-21ssh11:35:540
81850790,0irq/46-4a10000028846-21kworker/u2:209:20:120
81850790,0irq/46-4a10000022170-21seq11:20:010
81850790,0irq/46-4a10000016920-21ssh12:17:530
190192790,0chrt17535-21kworker/u2:408:25:570
81950780,0irq/47-4a1000008022-21apt10:49:570
81950780,0irq/47-4a10000032394-21ssh11:41:410
81950780,0irq/47-4a10000011602-21rm12:06:310
81950780,0irq/47-4a10000011313-21kworker/u2:011:00:130
81850780,0irq/46-4a10000027228-21ssh11:30:420
81850780,0irq/46-4a10000026122-21sh09:10:450
81850780,0irq/46-4a10000025173-21ssh10:17:380
81850780,0irq/46-4a10000022874-21ssh11:21:250
81850780,0irq/46-4a10000015201-21runrttasks12:13:430
244262780,0chrt18857-21kworker/u2:412:33:490
224492780,0chrt22282-21kworker/u2:308:48:100
81950770,0irq/47-4a10000031233-21gpg-connect-age10:30:110
81950770,0irq/47-4a10000028155-21ssh09:15:000
81950770,0irq/47-4a10000023899-21sshd08:58:030
81950770,0irq/47-4a10000016178-21kworker/u2:208:19:530
81850770,0irq/46-4a1000006105-21cron11:54:590
81850770,0irq/46-4a10000011318-21seq10:56:560
202632770,0chrt18857-21kworker/u2:412:25:020
108692770,0chrt10857-21kworker/u2:407:31:060
81950760,0irq/47-4a1000007000-21kworker/u2:407:14:590
81950760,0irq/47-4a10000018857-21kworker/u2:412:35:360
81850760,0irq/46-4a10000011292-21sshd09:48:040
249752760,0sleep022925-21kworker/u2:311:25:530
207052760,0chrt20093-21kworker/u2:110:08:060
183832760,0chrt18320-21kworker/u2:108:21:430
81950750,0irq/47-4a10000010330-21runrttasks07:27:400
81850750,0irq/46-4a1000008510-21kworker/u2:507:24:510
81850750,0irq/46-4a10000012811-21runrttasks07:44:460
156222750,0chrt15419-21kworker/u2:608:03:250
81950740,0irq/47-4a1000004307-21ssh09:33:190
81950740,0irq/47-4a10000023653-1kworker/u3:209:01:100
81950740,0irq/47-4a10000019812-21kworker/u2:408:34:530
81850740,0irq/46-4a10000019393-21diskmemload11:14:190
168442740,0sleep016178-21kworker/u2:208:11:260
130282740,0chrt11601-21kworker/u2:007:45:340
254392730,0sleep019064-21kworker/u2:009:08:240
141642730,0chrt13873-21kworker/u2:307:53:490
81950720,0irq/47-4a1000006568-21kworker/u2:007:14:530
101660,0ktimersoftd/020615-21seq08:36:590
101660,0ktimersoftd/015924-21date08:04:540
81850640,0irq/46-4a10000014697-21runrttasks07:57:110
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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