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2026-11-15 - 06:41

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 Sun Nov 15, 2026 00:43:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811650,0rcu_preempt19-21ksoftirqd/119:21:421
811370,0rcu_preempt3-21ksoftirqd/023:42:430
811340,0rcu_preempt20712-1kworker/0:1H19:42:240
811180,0rcu_preempt19-21ksoftirqd/119:34:411
811160,0rcu_preempt765-21rngd21:14:440
811100,0rcu_preempt765-21rngd19:30:300
811100,0rcu_preempt765-21rngd19:30:300
811090,0rcu_preempt3-21ksoftirqd/023:56:000
811090,0rcu_preempt3-21ksoftirqd/023:56:000
811080,0rcu_preempt6100-21date22:34:451
811060,0rcu_preempt19-21ksoftirqd/121:24:321
811050,0rcu_preempt12497-21kworker/1:021:14:441
811030,0rcu_preempt3-21ksoftirqd/023:49:430
81990,0rcu_preempt19-21ksoftirqd/122:04:441
81990,0rcu_preempt19-21ksoftirqd/121:19:431
81970,0rcu_preempt19-21ksoftirqd/123:54:311
81970,0rcu_preempt19-21ksoftirqd/123:54:311
81970,0rcu_preempt19-21ksoftirqd/123:29:381
81960,0rcu_preempt19-21ksoftirqd/123:24:461
81930,0rcu_preempt19-21ksoftirqd/123:09:311
81930,0rcu_preempt19-21ksoftirqd/122:19:311
81930,0rcu_preempt19-21ksoftirqd/120:44:431
81910,0rcu_preempt21438-21ssh00:27:271
81910,0rcu_preempt19-21ksoftirqd/119:54:311
81900,0rcu_preempt19-21ksoftirqd/123:19:441
81890,0rcu_preempt19-21ksoftirqd/100:12:421
81880,0rcu_preempt19-21ksoftirqd/123:59:491
81880,0rcu_preempt14656-1kworker/1:1H22:14:361
81860,0rcu_preempt19-21ksoftirqd/122:24:321
81860,0rcu_preempt19-21ksoftirqd/120:43:331
81850,0rcu_preempt19-21ksoftirqd/100:32:401
81830,0rcu_preempt19-21ksoftirqd/123:44:391
81830,0rcu_preempt19-21ksoftirqd/100:06:041
81810,0rcu_preempt19-21ksoftirqd/123:38:141
81780,0rcu_preempt19-21ksoftirqd/121:29:421
81780,0rcu_preempt19-21ksoftirqd/120:19:191
81770,0rcu_preempt19-21ksoftirqd/122:54:281
81770,0rcu_preempt16575-21diskmemload23:04:421
81760,0rcu_preempt2366-1kworker/1:3H22:32:291
81760,0rcu_preempt16575-21diskmemload21:11:261
81760,0rcu_preempt13157-21ssh23:14:331
81750,0rcu_preempt19-21ksoftirqd/122:49:311
81750,0rcu_preempt19-21ksoftirqd/121:39:181
81750,0rcu_preempt19-21ksoftirqd/121:39:181
81750,0rcu_preempt19-21ksoftirqd/119:49:181
81740,0rcu_preempt19-21ksoftirqd/121:48:211
81730,0rcu_preempt19-21ksoftirqd/122:09:431
81730,0rcu_preempt19-21ksoftirqd/120:49:311
81730,0rcu_preempt19-21ksoftirqd/120:34:381
81720,0rcu_preempt19-21ksoftirqd/120:24:501
81710,0rcu_preempt19-21ksoftirqd/122:39:401
81710,0rcu_preempt19-21ksoftirqd/121:54:461
81710,0rcu_preempt19-21ksoftirqd/120:29:421
81710,0rcu_preempt19-21ksoftirqd/120:14:441
81690,0rcu_preempt19-21ksoftirqd/122:44:581
81680,0rcu_preempt19-21ksoftirqd/122:59:381
81680,0rcu_preempt19-21ksoftirqd/119:29:181
81660,0rcu_preempt19-21ksoftirqd/123:51:131
81660,0rcu_preempt19-21ksoftirqd/100:14:391
81650,0rcu_preempt19-21ksoftirqd/123:41:281
81620,0rcu_preempt19-21ksoftirqd/120:09:311
81620,0rcu_preempt19-21ksoftirqd/119:44:431
81620,0rcu_preempt19-21ksoftirqd/100:19:201
81620,0rcu_preempt16575-21diskmemload00:39:081
81600,0rcu_preempt19-21ksoftirqd/121:04:171
81600,0rcu_preempt19-21ksoftirqd/119:14:421
81590,0rcu_preempt3-21ksoftirqd/023:34:420
81590,0rcu_preempt3-21ksoftirqd/022:19:270
81580,0rcu_preempt19246-21kworker/0:120:03:490
81580,0rcu_preempt16575-21diskmemload21:49:321
81570,0rcu_preempt3-21ksoftirqd/022:29:310
10050570,0irq/346-48484004566-1kworker/0:1H22:10:170
9950560,0irq/345-484840041ktimersoftd/021:41:580
81560,0rcu_preempt19-21ksoftirqd/122:02:261
30872560,0chrt10050irq/346-484840020:25:540
81550,0rcu_preempt19-21ksoftirqd/120:04:461
81550,0rcu_preempt19-21ksoftirqd/119:59:311
81540,0rcu_preempt3-21ksoftirqd/022:44:340
81540,0rcu_preempt3-21ksoftirqd/020:09:290
81540,0rcu_preempt3-21ksoftirqd/019:08:490
81540,0rcu_preempt19-21ksoftirqd/119:34:181
81540,0rcu_preempt19-21ksoftirqd/119:34:181
81530,0rcu_preempt3-21ksoftirqd/022:59:350
81520,0rcu_preempt3-21ksoftirqd/023:26:240
10050520,0irq/346-48484003-21ksoftirqd/023:07:180
81510,0rcu_preempt31129-21kworker/0:100:14:450
81510,0rcu_preempt19-21ksoftirqd/120:54:391
81510,0rcu_preempt19-21ksoftirqd/119:44:191
81500,0rcu_preempt3-21ksoftirqd/022:56:090
81500,0rcu_preempt3-21ksoftirqd/021:59:370
81500,0rcu_preempt3-21ksoftirqd/021:34:440
81500,0rcu_preempt3-21ksoftirqd/021:29:410
81500,0rcu_preempt3-21ksoftirqd/020:23:450
81500,0rcu_preempt25565-21ssh23:59:310
81500,0rcu_preempt19892-1kworker/0:3H00:29:390
81490,0rcu_preempt4713-21kworker/0:222:36:260
81490,0rcu_preempt3-21ksoftirqd/021:09:140
81490,0rcu_preempt3-21ksoftirqd/020:07:310
81490,0rcu_preempt22580-21kworker/0:023:46:530
10050490,0irq/346-4848400111rcuc/021:53:100
957299486,0cyclictest29410-1kworker/0:0H22:05:460
957299485,0cyclictest10234-1kworker/0:2H23:14:340
957299484,0cyclictest14657-1kworker/0:0H22:15:160
81480,0rcu_preempt3-21ksoftirqd/023:11:270
81480,0rcu_preempt3-21ksoftirqd/022:49:360
81480,0rcu_preempt3-21ksoftirqd/019:51:220
81480,0rcu_preempt19-21ksoftirqd/119:09:401
957299475,0cyclictest11788-1kworker/0:2H21:44:560
81470,0rcu_preempt3-21ksoftirqd/021:03:580
81470,0rcu_preempt31079-21kworker/u4:122:43:530
81470,0rcu_preempt2211-21ssh00:08:290
81470,0rcu_preempt10615-21if_eth320:49:370
81460,0rcu_preempt3-21ksoftirqd/023:30:440
81460,0rcu_preempt3-21ksoftirqd/021:24:380
81460,0rcu_preempt3-21ksoftirqd/020:34:370
81460,0rcu_preempt3-21ksoftirqd/020:16:540
9572994512,0cyclictest27457-21apt-get22:24:290
81450,0rcu_preempt3-21ksoftirqd/020:42:420
81450,0rcu_preempt3-21ksoftirqd/019:59:150
81450,0rcu_preempt3-21ksoftirqd/019:14:340
81450,0rcu_preempt19-21ksoftirqd/119:04:411
81440,0rcu_preempt7529-21kworker/0:000:35:560
81440,0rcu_preempt3-21ksoftirqd/021:57:460
81440,0rcu_preempt3-21ksoftirqd/020:54:360
81440,0rcu_preempt3-21ksoftirqd/000:20:440
9950430,0irq/345-4848400111rcuc/021:09:580
81430,0rcu_preempt3-21ksoftirqd/020:30:410
81430,0rcu_preempt3-21ksoftirqd/019:14:180
81430,0rcu_preempt3-21ksoftirqd/000:24:340
81430,0rcu_preempt19-21ksoftirqd/121:09:171
81420,0rcu_preempt3-21ksoftirqd/021:20:310
81420,0rcu_preempt3-21ksoftirqd/000:13:250
81410,0rcu_preempt3-21ksoftirqd/019:34:260
81400,0rcu_preempt3-21ksoftirqd/023:19:280
81400,0rcu_preempt3-21ksoftirqd/020:44:330
81390,0rcu_preempt3-21ksoftirqd/019:44:460
957299381,0cyclictest14503-1kworker/0:0H19:24:170
957299372,0cyclictest0-21swapper/019:24:500
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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