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2026-07-22 - 08:56

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #a, slot #5

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: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes
Compare latency of primary with shadow system
Characteristics of the highest latencies:
System rackaslot5s.osadl.org (updated Wed Jul 22, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811370,0rcu_preempt8543-21ssh21:53:300
811360,0rcu_preempt19-21ksoftirqd/120:17:261
811250,0rcu_preempt3-21ksoftirqd/019:19:140
811220,0rcu_preempt3-21ksoftirqd/023:59:260
811160,0rcu_preempt6000-21kworker/0:123:27:190
811150,0rcu_preempt23208-21ping19:35:310
811100,0rcu_preempt3-21ksoftirqd/021:02:120
811090,0rcu_preempt3-21ksoftirqd/019:41:060
811070,0rcu_preempt3-21ksoftirqd/022:02:110
811030,0rcu_preempt23208-21ping19:25:060
811000,0rcu_preempt3-21ksoftirqd/022:11:540
81990,0rcu_preempt3-21ksoftirqd/000:17:220
81940,0rcu_preempt3-21ksoftirqd/023:42:210
81940,0rcu_preempt3-21ksoftirqd/022:12:120
81920,0rcu_preempt3-21ksoftirqd/019:47:180
81910,0rcu_preempt3-21ksoftirqd/020:07:240
81890,0rcu_preempt3-21ksoftirqd/019:52:260
81880,0rcu_preempt3-21ksoftirqd/021:17:350
81860,0rcu_preempt3-21ksoftirqd/023:52:230
81860,0rcu_preempt3-21ksoftirqd/023:32:190
81860,0rcu_preempt3-21ksoftirqd/000:32:230
81840,0rcu_preempt3-21ksoftirqd/022:31:590
81840,0rcu_preempt3-21ksoftirqd/022:17:190
81840,0rcu_preempt3-21ksoftirqd/021:07:220
81840,0rcu_preempt19-21ksoftirqd/100:17:111
81820,0rcu_preempt28127-21munin-run19:31:560
81820,0rcu_preempt0-21swapper/000:23:080
81810,0rcu_preempt3-21ksoftirqd/020:12:250
81790,0rcu_preempt3-21ksoftirqd/023:47:140
81790,0rcu_preempt19-21ksoftirqd/119:17:091
81780,0rcu_preempt3-21ksoftirqd/022:27:230
81770,0rcu_preempt3-21ksoftirqd/023:22:120
81770,0rcu_preempt3-21ksoftirqd/021:57:090
81770,0rcu_preempt3-21ksoftirqd/021:48:100
81750,0rcu_preempt3-21ksoftirqd/022:24:180
81750,0rcu_preempt3-21ksoftirqd/020:27:150
81750,0rcu_preempt3-21ksoftirqd/019:57:130
81740,0rcu_preempt3-21ksoftirqd/022:57:120
81740,0rcu_preempt3-21ksoftirqd/020:17:200
81740,0rcu_preempt22147-21apt-get20:52:080
81730,0rcu_preempt3-21ksoftirqd/019:42:110
81730,0rcu_preempt28346-21ssh23:19:540
81730,0rcu_preempt28346-21ssh23:19:540
81720,0rcu_preempt3-21ksoftirqd/023:07:250
81720,0rcu_preempt3-21ksoftirqd/022:37:230
81720,0rcu_preempt3-21ksoftirqd/000:27:130
81720,0rcu_preempt3-21ksoftirqd/000:27:130
81720,0rcu_preempt19-21ksoftirqd/123:46:421
81720,0rcu_preempt19-21ksoftirqd/122:37:241
81720,0rcu_preempt0-21swapper/021:33:070
81720,0rcu_preempt0-21swapper/021:33:070
81710,0rcu_preempt3-21ksoftirqd/021:11:560
81700,0rcu_preempt3-21ksoftirqd/020:02:210
81700,0rcu_preempt3-21ksoftirqd/000:03:360
81690,0rcu_preempt3-21ksoftirqd/023:37:090
81680,0rcu_preempt3-21ksoftirqd/022:42:230
81680,0rcu_preempt3-21ksoftirqd/021:46:560
81680,0rcu_preempt3-21ksoftirqd/021:46:560
81680,0rcu_preempt3-21ksoftirqd/021:27:210
81680,0rcu_preempt3-21ksoftirqd/019:12:290
81670,0rcu_preempt9600-21aten_rapower_en00:07:070
81670,0rcu_preempt3-21ksoftirqd/022:52:520
81660,0rcu_preempt3-21ksoftirqd/023:16:270
81660,0rcu_preempt3-21ksoftirqd/020:42:130
81640,0rcu_preempt3-21ksoftirqd/022:47:090
81640,0rcu_preempt3-21ksoftirqd/020:47:180
81640,0rcu_preempt3-21ksoftirqd/020:22:200
81610,0rcu_preempt3-21ksoftirqd/020:37:100
81610,0rcu_preempt3-21ksoftirqd/000:12:230
81600,0rcu_preempt19-21ksoftirqd/122:12:081
81590,0rcu_preempt24919-21ssh21:37:200
81590,0rcu_preempt19-21ksoftirqd/123:28:101
81590,0rcu_preempt19-21ksoftirqd/122:59:361
81580,0rcu_preempt19-21ksoftirqd/100:27:261
81580,0rcu_preempt19-21ksoftirqd/100:27:261
81580,0rcu_preempt19-21ksoftirqd/100:11:551
81570,0rcu_preempt3-21ksoftirqd/021:22:220
81570,0rcu_preempt3-21ksoftirqd/019:07:170
81570,0rcu_preempt19-21ksoftirqd/123:23:081
81570,0rcu_preempt15742-21dropbear20:32:080
81570,0rcu_preempt15742-21dropbear20:32:080
81560,0rcu_preempt3-21ksoftirqd/020:57:130
81550,0rcu_preempt19-21ksoftirqd/123:35:041
81550,0rcu_preempt19-21ksoftirqd/123:13:011
81550,0rcu_preempt19-21ksoftirqd/122:49:551
81550,0rcu_preempt19-21ksoftirqd/121:02:191
81550,0rcu_preempt19-21ksoftirqd/120:11:121
81550,0rcu_preempt19-21ksoftirqd/100:36:551
81540,0rcu_preempt7588-21kworker/1:221:22:091
81540,0rcu_preempt3-21ksoftirqd/023:04:270
81540,0rcu_preempt19-21ksoftirqd/119:57:171
81540,0rcu_preempt19-21ksoftirqd/100:05:421
81530,0rcu_preempt19-21ksoftirqd/123:47:211
81530,0rcu_preempt19-21ksoftirqd/121:09:431
81520,0rcu_preempt19-21ksoftirqd/122:03:361
81520,0rcu_preempt19-21ksoftirqd/120:52:151
81520,0rcu_preempt19-21ksoftirqd/120:02:131
81510,0rcu_preempt3-21ksoftirqd/019:02:160
81510,0rcu_preempt19-21ksoftirqd/119:26:561
81510,0rcu_preempt19-21ksoftirqd/100:14:541
81500,0rcu_preempt19-21ksoftirqd/121:28:551
81480,0rcu_preempt19-21ksoftirqd/121:37:261
81470,0rcu_preempt19-21ksoftirqd/122:22:311
81470,0rcu_preempt19-21ksoftirqd/121:42:181
81470,0rcu_preempt19-21ksoftirqd/121:42:181
81470,0rcu_preempt19-21ksoftirqd/120:12:261
81460,0rcu_preempt19-21ksoftirqd/121:48:511
81460,0rcu_preempt19-21ksoftirqd/119:37:181
81450,0rcu_preempt26926-21diskmemload21:21:081
81450,0rcu_preempt19-21ksoftirqd/122:07:061
81440,0rcu_preempt19-21ksoftirqd/121:13:251
81430,0rcu_preempt19-21ksoftirqd/122:34:191
81430,0rcu_preempt1470-21runrttasks23:20:271
81430,0rcu_preempt1470-21runrttasks23:20:271
81420,0rcu_preempt26926-21diskmemload21:52:191
81410,0rcu_preempt26926-21diskmemload21:58:591
81410,0rcu_preempt19-21ksoftirqd/123:37:081
81410,0rcu_preempt19-21ksoftirqd/121:32:161
81410,0rcu_preempt19-21ksoftirqd/121:32:161
81410,0rcu_preempt19-21ksoftirqd/119:29:031
81400,0rcu_preempt26926-21diskmemload22:42:211
81400,0rcu_preempt19-21ksoftirqd/100:22:211
81390,0rcu_preempt26926-21diskmemload22:17:551
81390,0rcu_preempt19-21ksoftirqd/122:27:141
81390,0rcu_preempt19-21ksoftirqd/120:45:561
81390,0rcu_preempt0-21swapper/123:53:101
81380,0rcu_preempt26926-21diskmemload23:03:131
81380,0rcu_preempt19-21ksoftirqd/123:57:281
81380,0rcu_preempt19-21ksoftirqd/123:07:161
81380,0rcu_preempt19-21ksoftirqd/122:56:561
81380,0rcu_preempt19-21ksoftirqd/120:58:501
81380,0rcu_preempt19-21ksoftirqd/119:48:341
81380,0rcu_preempt19-21ksoftirqd/119:32:201
81380,0rcu_preempt19-21ksoftirqd/119:07:081
81380,0rcu_preempt19-21ksoftirqd/119:02:071
81370,0rcu_preempt19-21ksoftirqd/120:28:351
81370,0rcu_preempt19-21ksoftirqd/120:26:161
81370,0rcu_preempt19-21ksoftirqd/119:53:151
81370,0rcu_preempt19-21ksoftirqd/119:42:281
81370,0rcu_preempt0-21swapper/119:13:371
81360,0rcu_preempt19-21ksoftirqd/120:50:101
81360,0rcu_preempt19-21ksoftirqd/120:40:381
81350,0rcu_preempt19-21ksoftirqd/120:33:431
81350,0rcu_preempt19-21ksoftirqd/120:33:431
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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