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2025-12-01 - 17:45

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 Mon Dec 01, 2025 12:44:45)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
818501630,0irq/46-4a10000023161-21runrttasks07:06:200
236389911735,0cyclictest2156-21cron12:20:000
236389911427,0cyclictest14826-21in:imuxsock09:25:520
236389911137,0cyclictest81850irq/46-4a10000007:14:580
236389911042,0cyclictest81850irq/46-4a10000011:58:580
236389911040,0cyclictest81850irq/46-4a10000011:54:100
236389911029,0cyclictest17189-21sh11:42:350
236389910837,0cyclictest81850irq/46-4a10000011:14:080
236389910830,0cyclictest15201-21runrttasks11:33:570
236389910827,0cyclictest28524-21sh12:06:490
236389910827,0cyclictest18333-21sh10:35:450
236389910826,0cyclictest16460-21sh09:23:250
236389910820,0cyclictest22218-21sh09:35:290
236389910740,0cyclictest81850irq/46-4a10000009:57:530
236389910730,0cyclictest14809-21sh10:28:190
236389910728,0cyclictest26962-21sh12:03:340
236389910727,0cyclictest9332-21sh11:25:450
236389910727,0cyclictest24836-21sh10:49:520
236389910723,0cyclictest27761-21ssh10:55:480
236389910633,0cyclictest81850irq/46-4a10000008:14:530
236389910627,0cyclictest4437-21sh10:06:250
236389910626,0cyclictest11037-21sh09:12:010
236389910624,0cyclictest7364-21sshd08:51:520
236389910621,0cyclictest81950irq/47-4a10000010:51:470
236389910529,0cyclictest12166-21kworker/u2:011:46:460
236389910527,0cyclictest31373-21sh12:13:000
236389910427,0cyclictest5403-21sh11:17:260
236389910427,0cyclictest12689-21sh09:15:250
236389910427,0cyclictest12464-21sh10:23:270
236389910424,0cyclictest26082-21kworker/u2:612:30:170
236389910424,0cyclictest14181-21sh11:36:080
236389910416,0cyclictest5747-21sshd08:40:410
236389910328,0cyclictest14826-21in:imuxsock09:05:490
236389910327,0cyclictest6733-21sh12:29:470
236389910324,0cyclictest31371-21apt09:54:560
236389910229,0cyclictest28976-21sshd09:49:540
236389910224,0cyclictest81950irq/47-4a10000009:44:580
236389910222,0cyclictest6369-21latency_hist08:44:560
236389910128,0cyclictest21780-21diskmemload10:43:140
236389910126,0cyclictest3864-21seq12:23:330
236389910126,0cyclictest15981-21diskmemload10:30:410
236389910122,0cyclictest81950irq/47-4a10000012:36:480
236389910027,0cyclictest7213-21seq10:12:200
23638999925,0cyclictest2650-21seq10:02:410
23638999826,0cyclictest23636-21cyclictest07:33:540
23638999734,0cyclictest101ktimersoftd/011:23:470
23638999612,0cyclictest29631-21kworker/u2:611:00:270
23638999433,0cyclictest101ktimersoftd/009:03:500
23638998824,0cyclictest0-21swapper09:32:020
23638998625,0cyclictest0-21swapper10:18:060
23638997527,0cyclictest0-21swapper07:20:270
81850600,0irq/46-4a10000027467-1kworker/u3:107:36:130
23638996028,0cyclictest0-21swapper11:08:300
23638995746,0cyclictest81850irq/46-4a10000007:50:030
101530,0ktimersoftd/00-21swapper08:57:400
23638995224,0cyclictest0-21swapper08:20:210
101520,0ktimersoftd/00-21swapper08:34:390
101510,0ktimersoftd/00-21swapper08:03:280
23638995032,0cyclictest24357-21idleruntime-cro07:14:520
23638994934,0cyclictest2156-21runrttasks08:18:180
23638994933,0cyclictest15180-21lldpd07:58:030
23638994833,0cyclictest5287-21runrttasks08:38:050
23638994832,0cyclictest23636-21cyclictest08:25:020
23638994730,0cyclictest29211-21runrttasks07:43:100
23638994730,0cyclictest15180-21lldpd07:47:020
23638994630,0cyclictest15201-21runrttasks07:29:130
23638994530,0cyclictest32664-21latency_hist08:04:530
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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