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2025-05-16 - 00:34

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 376 highest latencies:
System rack9slot8s.osadl.org (updated Thu May 15, 2025 12:44:45)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
819501560,0irq/47-4a10000010246-21sshd07:05:430
81950920,0irq/47-4a10000029067-21rm12:07:290
81950920,0irq/47-4a10000026076-21ssh11:59:270
81950910,0irq/47-4a10000032342-21ssh10:48:310
81950900,0irq/47-4a1000001847-21ssh09:24:320
81950880,0irq/47-4a1000007839-21ssh12:34:580
81950880,0irq/47-4a10000016207-21sshd07:43:430
81950880,0irq/47-4a10000012246-21ssh09:53:420
81850880,0irq/46-4a10000031713-21sh09:16:410
81950870,0irq/47-4a1000008011-21rm11:09:460
81950870,0irq/47-4a10000031074-21rm12:12:230
81950870,0irq/47-4a1000003092-21ssh09:28:070
81950870,0irq/47-4a10000013291-21rm11:24:170
81950860,0irq/47-4a1000009969-21ssh09:46:330
81950860,0irq/47-4a1000006738-21ssh09:37:520
81950860,0irq/47-4a10000029367-21rm10:40:280
81950860,0irq/47-4a10000027506-21rm10:35:450
81950860,0irq/47-4a10000019616-21kworker/u2:310:15:140
81950860,0irq/47-4a10000014335-21ssh10:00:270
81850860,0irq/46-4a1000008145-1kworker/u3:209:44:190
81950850,0irq/47-4a1000009040-21ssh11:12:310
81950850,0irq/47-4a100000886-21ssh10:50:580
81950850,0irq/47-4a1000004208-21sshd12:25:440
81950850,0irq/47-4a1000003469-21ssh12:24:150
81950850,0irq/47-4a10000029636-21kworker/u2:111:04:380
81950850,0irq/47-4a10000026789-21ssh10:34:020
81950850,0irq/47-4a10000022240-21runrttasks10:21:230
81950850,0irq/47-4a1000001297-21ssh12:19:000
81950840,0irq/47-4a1000004978-21ssh09:33:120
81950840,0irq/47-4a10000030528-21rm09:13:330
81950840,0irq/47-4a1000002608-21kworker/u2:010:00:010
81950840,0irq/47-4a10000023576-21ssh10:25:060
81950840,0irq/47-4a10000023470-21kworker/u2:212:03:570
81950840,0irq/47-4a10000016934-21ssh11:34:070
81950840,0irq/47-4a10000016647-21ssh10:06:440
81950840,0irq/47-4a10000011738-21kworker/u2:511:25:050
81950830,0irq/47-4a1000009349-21ssh12:38:240
81950830,0irq/47-4a10000029252-21diskmemload11:42:080
81950830,0irq/47-4a1000002744-21rm10:55:480
81950830,0irq/47-4a10000024186-21rm11:54:140
81950830,0irq/47-4a10000021364-21ssh11:46:080
81950830,0irq/47-4a10000010777-21kworker/u2:211:17:250
81950820,0irq/47-4a10000024169-1kworker/u3:008:40:020
81950820,0irq/47-4a10000021804-21runrttasks08:21:240
81950820,0irq/47-4a10000018523-21runrttasks07:59:500
81950820,0irq/47-4a10000017417-21ssh11:35:070
81950820,0irq/47-4a10000011538-21munin-run07:15:020
212322820,0sleep021095-21kworker/u2:108:17:520
81950810,0irq/47-4a10000028524-21apt09:05:010
81950810,0irq/47-4a10000027332-21runrttasks08:56:350
81950810,0irq/47-4a10000025613-21snmpd07:24:200
81950810,0irq/47-4a10000021497-21kworker/u2:308:45:030
81950810,0irq/47-4a10000015087-21sshd07:35:440
81950810,0irq/47-4a10000012707-21sendmail07:20:020
81950800,0irq/47-4a10000029191-21runrttasks09:09:420
81950800,0irq/47-4a10000026616-21kworker/u2:008:55:020
81950800,0irq/47-4a10000018285-21ssh10:11:130
81950800,0irq/47-4a10000016691-21sshd07:46:430
81950790,0irq/47-4a10000018869-21kworker/u2:308:05:010
81850790,0irq/46-4a10000014177-21idleruntime-cro07:30:010
81950780,0irq/47-4a10000015617-21kworker/u2:407:50:030
81850780,0irq/46-4a10000022576-21cat08:25:130
234852780,0chrt21873-21kworker/u2:508:31:370
206912770,0sleep020350-21kworker/u2:408:14:300
196872770,0chrt18099-21kworker/u2:108:07:130
81850760,0irq/46-4a10000014903-21pluginstate07:35:030
260882730,0sleep025134-21kworker/u2:108:48:170
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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