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2025-11-23 - 02:47

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 100 highest latencies:
System rack9slot8s.osadl.org (updated Sat Nov 22, 2025 12:44:46)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
819501210,0irq/47-4a10000018032-1kworker/u3:207:05:210
81850860,0irq/46-4a10000030853-21ssh11:13:050
81850840,0irq/46-4a10000014666-21munin-run09:29:560
81850780,0irq/46-4a10000021230-21ssh12:01:280
81850770,0irq/46-4a10000027109-21ssh09:56:260
81850770,0irq/46-4a10000011690-21ssh09:23:290
81850760,0irq/46-4a1000004314-21ssh11:25:230
81850760,0irq/46-4a10000028914-21ssh12:17:440
81850760,0irq/46-4a10000018851-21ssh09:38:510
81850760,0irq/46-4a1000001548-21ssh12:28:300
81850750,0irq/46-4a10000024430-21ssh10:59:350
81850730,0irq/46-4a10000031835-21ssh10:06:330
81850730,0irq/46-4a10000016488-1kworker/u3:412:05:310
81850720,0irq/46-4a10000029656-21kworker/u2:710:40:170
81850720,0irq/46-4a10000029160-21ssh11:09:330
81850720,0irq/46-4a10000016939-21ssh09:34:490
81850710,0irq/46-4a1000005638-21ssh09:10:440
81850700,0irq/46-4a1000008857-21kworker/u2:011:20:210
81850700,0irq/46-4a1000003982-1kworker/u3:010:20:130
81850700,0irq/46-4a10000019869-21ssh09:40:520
81850700,0irq/46-4a10000011705-21kworker/u2:311:56:250
81850700,0irq/46-4a1000001136-21ssh10:10:060
81850690,0irq/46-4a1000008857-21kworker/u2:010:52:420
81850690,0irq/46-4a10000030745-21apt-get08:25:190
81850690,0irq/46-4a10000027750-21kworker/u2:111:16:260
81850690,0irq/46-4a10000022482-21kworker/u2:209:53:420
81850690,0irq/46-4a10000018478-21kworker/u2:110:48:450
81850690,0irq/46-4a10000011705-21kworker/u2:311:47:070
81850680,0irq/46-4a1000003977-21kworker/u2:609:15:040
81850680,0irq/46-4a1000002607-21kworker/u2:211:41:010
81850680,0irq/46-4a10000020914-21kworker/u2:712:11:230
81850680,0irq/46-4a10000012418-21kworker/u2:507:14:510
81850670,0irq/46-4a100000909-21kworker/u2:210:18:210
81850670,0irq/46-4a10000011255-21kworker/u2:110:37:520
81850670,0irq/46-4a10000010988-21kworker/u2:509:45:130
81850660,0irq/46-4a10000030606-21kworker/u2:612:38:460
81850660,0irq/46-4a10000023810-21kworker/u2:012:33:120
81850660,0irq/46-4a10000020496-21kworker/u2:211:01:410
81850650,0irq/46-4a10000030606-21kworker/u2:612:21:310
81950640,0irq/47-4a10000029655-1kworker/u3:410:04:590
81850630,0irq/46-4a1000008857-21kworker/u2:010:29:390
81850630,0irq/46-4a10000029656-21kworker/u2:710:33:280
81850620,0irq/46-4a10000010432-21ssh11:38:400
81850610,0irq/46-4a1000004988-21kworker/u2:311:32:000
81850600,0irq/46-4a10000029526-1kworker/u3:008:21:270
81850590,0irq/46-4a1000000-21swapper11:54:510
19211995746,0cyclictest81850irq/46-4a10000008:59:540
81850560,0irq/46-4a1000000-21swapper07:32:370
19211995530,0cyclictest0-21swapper07:21:370
19211995236,0cyclictest1212-21runrttasks08:42:590
19211995110,0cyclictest19980-21munin-node07:14:540
19211994939,0cyclictest101ktimersoftd/007:41:080
19211994933,0cyclictest24917-21latency_hist07:44:550
19211994834,0cyclictest27718-21sshd08:04:330
19211994833,0cyclictest26571-21runrttasks07:56:230
19211994832,0cyclictest2992-21latency_hist08:54:550
19211994831,0cyclictest22001-21sshd07:25:130
19211994816,0cyclictest29986-21sh08:19:530
19211994737,0cyclictest81850irq/46-4a10000008:07:320
19211994730,0cyclictest785-21latency_hist08:39:560
19211994725,0cyclictest4664-21runrttasks09:06:020
19211994632,0cyclictest31943-21sshd08:31:130
19211994630,0cyclictest15201-21runrttasks07:51:130
19211994621,0cyclictest1831-21seq08:47:040
19211994536,0cyclictest101ktimersoftd/008:10:310
19211994536,0cyclictest101ktimersoftd/007:39:540
19211994529,0cyclictest15180-21lldpd09:02:260
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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