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2026-07-30 - 19:26

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 Thu Jul 30, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81930,0rcu_preempt3-21ksoftirqd/011:05:310
81880,0rcu_preempt19-21ksoftirqd/111:19:561
81860,0rcu_preempt19-21ksoftirqd/112:22:261
81840,0rcu_preempt30876-21kworker/0:209:31:160
81840,0rcu_preempt30876-21kworker/0:209:31:160
81760,0rcu_preempt3-21ksoftirqd/012:32:410
81760,0rcu_preempt3-21ksoftirqd/011:40:140
81730,0rcu_preempt3-21ksoftirqd/011:34:490
81730,0rcu_preempt19-21ksoftirqd/112:19:071
81720,0rcu_preempt19-21ksoftirqd/111:20:261
81710,0rcu_preempt3-21ksoftirqd/011:23:040
81710,0rcu_preempt3-21ksoftirqd/010:39:510
81710,0rcu_preempt3-21ksoftirqd/010:23:190
81710,0rcu_preempt3-21ksoftirqd/010:19:580
81700,0rcu_preempt3-21ksoftirqd/009:50:260
81700,0rcu_preempt3-21ksoftirqd/009:14:220
81690,0rcu_preempt3-21ksoftirqd/012:09:120
81690,0rcu_preempt3-21ksoftirqd/012:04:280
81690,0rcu_preempt3-21ksoftirqd/011:48:160
81690,0rcu_preempt3-21ksoftirqd/011:35:030
81690,0rcu_preempt3-21ksoftirqd/011:27:360
81690,0rcu_preempt3-21ksoftirqd/011:17:130
81690,0rcu_preempt3-21ksoftirqd/010:25:120
81690,0rcu_preempt3-21ksoftirqd/009:36:080
81690,0rcu_preempt3-21ksoftirqd/009:26:440
81680,0rcu_preempt3-21ksoftirqd/012:25:010
81680,0rcu_preempt3-21ksoftirqd/011:52:140
81680,0rcu_preempt3-21ksoftirqd/009:56:470
81680,0rcu_preempt3-21ksoftirqd/009:18:200
81670,0rcu_preempt3-21ksoftirqd/012:39:510
81670,0rcu_preempt3-21ksoftirqd/010:03:150
81660,0rcu_preempt3-21ksoftirqd/012:22:360
81660,0rcu_preempt3-21ksoftirqd/012:10:450
81660,0rcu_preempt3-21ksoftirqd/011:02:310
81660,0rcu_preempt3-21ksoftirqd/010:53:450
81660,0rcu_preempt3-21ksoftirqd/010:08:200
81660,0rcu_preempt19-21ksoftirqd/109:38:301
81640,0rcu_preempt19-21ksoftirqd/112:00:181
81610,0rcu_preempt19-21ksoftirqd/112:11:261
81600,0rcu_preempt19-21ksoftirqd/110:15:151
81570,0rcu_preempt19-21ksoftirqd/111:50:201
81570,0rcu_preempt19-21ksoftirqd/108:15:221
81560,0rcu_preempt3-21ksoftirqd/008:00:110
81560,0rcu_preempt19-21ksoftirqd/108:12:001
81550,0rcu_preempt3-21ksoftirqd/010:45:270
81550,0rcu_preempt28627-21kworker/1:010:24:471
81540,0rcu_preempt3-21ksoftirqd/012:17:340
81540,0rcu_preempt3-21ksoftirqd/009:40:100
81540,0rcu_preempt3-21ksoftirqd/009:40:100
81540,0rcu_preempt3-21ksoftirqd/008:55:110
10050540,0irq/346-484840021708-1kworker/0:0H11:59:530
81520,0rcu_preempt3-21ksoftirqd/008:41:110
10050520,0irq/346-48484008175-1kworker/0:2H11:13:270
81510,0rcu_preempt3-21ksoftirqd/010:55:260
81510,0rcu_preempt3-21ksoftirqd/010:13:030
81510,0rcu_preempt3-21ksoftirqd/007:55:190
81510,0rcu_preempt31335-21ssh10:30:550
81510,0rcu_preempt19-21ksoftirqd/111:55:101
81510,0rcu_preempt19-21ksoftirqd/107:37:391
81500,0rcu_preempt3-21ksoftirqd/009:20:120
81500,0rcu_preempt19-21ksoftirqd/109:15:251
81500,0rcu_preempt19-21ksoftirqd/109:10:511
496899503,0cyclictest0-21swapper/008:16:290
10050500,0irq/346-484840016019-21runrttasks09:45:080
81490,0rcu_preempt3-21ksoftirqd/007:40:110
81490,0rcu_preempt3-21ksoftirqd/007:40:110
81490,0rcu_preempt22218-21kworker/1:112:35:041
81490,0rcu_preempt19-21ksoftirqd/112:29:221
81490,0rcu_preempt19-21ksoftirqd/111:40:191
81490,0rcu_preempt19-21ksoftirqd/111:13:591
81490,0rcu_preempt19-21ksoftirqd/110:14:121
81490,0rcu_preempt19-21ksoftirqd/110:03:571
496899493,0cyclictest0-21swapper/008:11:410
4350490,0irq/32-433000006929-21dropbear07:15:130
81480,0rcu_preempt3-21ksoftirqd/010:40:100
81480,0rcu_preempt3-21ksoftirqd/008:25:100
81480,0rcu_preempt19-21ksoftirqd/110:34:031
81480,0rcu_preempt0-21swapper/109:22:371
81470,0rcu_preempt19-21ksoftirqd/111:34:061
81470,0rcu_preempt19-21ksoftirqd/110:05:321
81470,0rcu_preempt19-21ksoftirqd/107:27:591
10050470,0irq/346-484840024604-21runrttasks08:09:400
10050470,0irq/346-484840011450-21seq07:29:170
81460,0rcu_preempt3-21ksoftirqd/008:30:180
81460,0rcu_preempt3-21ksoftirqd/008:24:400
81460,0rcu_preempt19-21ksoftirqd/111:25:261
81460,0rcu_preempt19-21ksoftirqd/108:39:471
81460,0rcu_preempt19-21ksoftirqd/107:42:481
81460,0rcu_preempt19-21ksoftirqd/107:42:481
81460,0rcu_preempt12604-21kworker/0:207:35:140
81450,0rcu_preempt4176-21ps07:05:220
81450,0rcu_preempt3-21ksoftirqd/009:05:210
81450,0rcu_preempt24407-21kworker/1:008:24:511
81450,0rcu_preempt19-21ksoftirqd/110:50:191
81450,0rcu_preempt19-21ksoftirqd/109:45:191
81450,0rcu_preempt19-21ksoftirqd/108:01:591
81450,0rcu_preempt19-21ksoftirqd/107:50:211
81450,0rcu_preempt19-21ksoftirqd/107:22:011
81440,0rcu_preempt3-21ksoftirqd/008:35:140
81440,0rcu_preempt19-21ksoftirqd/109:55:591
81440,0rcu_preempt19-21ksoftirqd/107:35:001
10050440,0irq/346-48484006563-21ntp_kernel_err08:50:250
81430,0rcu_preempt5298-21df_abs07:10:120
81430,0rcu_preempt3-21ksoftirqd/008:45:240
81430,0rcu_preempt3-21ksoftirqd/007:45:300
81430,0rcu_preempt19-21ksoftirqd/109:50:191
81430,0rcu_preempt19-21ksoftirqd/109:40:111
81430,0rcu_preempt19-21ksoftirqd/109:40:111
81430,0rcu_preempt15087-1kworker/1:1H11:02:051
9950420,0irq/345-484840026824-1kworker/1:1H12:05:331
81420,0rcu_preempt19-21ksoftirqd/112:30:181
81420,0rcu_preempt19-21ksoftirqd/110:48:221
81420,0rcu_preempt19-21ksoftirqd/108:30:131
81420,0rcu_preempt19-21ksoftirqd/107:55:221
81420,0rcu_preempt19-21ksoftirqd/107:48:341
81420,0rcu_preempt19-21ksoftirqd/107:10:181
81420,0rcu_preempt19-21ksoftirqd/107:05:241
81410,0rcu_preempt19-21ksoftirqd/111:49:281
81410,0rcu_preempt19-21ksoftirqd/111:35:151
81410,0rcu_preempt19-21ksoftirqd/110:35:211
81410,0rcu_preempt19-21ksoftirqd/109:30:131
81410,0rcu_preempt19-21ksoftirqd/109:30:131
81410,0rcu_preempt19-21ksoftirqd/109:27:291
81410,0rcu_preempt19-21ksoftirqd/108:50:171
81400,0rcu_preempt3-21ksoftirqd/009:00:100
81400,0rcu_preempt19-21ksoftirqd/110:55:141
81400,0rcu_preempt19-21ksoftirqd/109:02:041
81400,0rcu_preempt19-21ksoftirqd/108:06:331
81400,0rcu_preempt18871-21ntp_kernel_err07:50:210
301162400,0chrt27587-1kworker/1:0H08:25:081
81390,0rcu_preempt3-21ksoftirqd/007:30:320
81390,0rcu_preempt19-21ksoftirqd/108:49:141
81380,0rcu_preempt8935-21taskset08:58:581
81380,0rcu_preempt19-21ksoftirqd/111:06:131
81380,0rcu_preempt19-21ksoftirqd/108:40:071
81370,0rcu_preempt19-21ksoftirqd/110:40:501
81370,0rcu_preempt19-21ksoftirqd/110:27:231
81370,0rcu_preempt19-21ksoftirqd/109:07:021
81370,0rcu_preempt19-21ksoftirqd/107:15:301
81350,0rcu_preempt8356-21cat07:20:010
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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