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2025-12-05 - 10:46

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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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 Fri Dec 05, 2025 00:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811640,0rcu_preempt3-21ksoftirqd/019:29:580
811430,0rcu_preempt54-21kswapd019:24:450
811290,0rcu_preempt2374-1kworker/0:0H23:54:220
811210,0rcu_preempt3-21ksoftirqd/022:49:510
811180,0rcu_preempt22682-1kworker/0:1H23:39:230
811170,0rcu_preempt19-21ksoftirqd/121:39:391
811130,0rcu_preempt1751-1kworker/0:0H19:34:580
811130,0rcu_preempt1751-1kworker/0:0H19:34:580
811050,0rcu_preempt3-21ksoftirqd/021:27:490
811040,0rcu_preempt3-21ksoftirqd/022:33:430
811040,0rcu_preempt3-21ksoftirqd/021:34:380
811030,0rcu_preempt3-21ksoftirqd/000:14:390
81990,0rcu_preempt19-21ksoftirqd/120:06:391
81950,0rcu_preempt32279-1kworker/0:3H21:49:410
81910,0rcu_preempt3-21ksoftirqd/023:09:470
81900,0rcu_preempt3-21ksoftirqd/000:34:470
81890,0rcu_preempt3-21ksoftirqd/022:24:500
81860,0rcu_preempt3383-1kworker/0:4H19:44:510
81860,0rcu_preempt3-21ksoftirqd/023:54:470
81850,0rcu_preempt3-21ksoftirqd/022:54:500
81850,0rcu_preempt3-21ksoftirqd/022:39:480
81850,0rcu_preempt3-21ksoftirqd/021:14:230
81850,0rcu_preempt3-21ksoftirqd/000:24:540
81850,0rcu_preempt19-21ksoftirqd/123:09:381
81840,0rcu_preempt20314-21kworker/0:222:04:380
81790,0rcu_preempt8605-1kworker/0:0H19:54:480
81780,0rcu_preempt3-21ksoftirqd/021:44:420
81780,0rcu_preempt0-21swapper/021:58:100
81770,0rcu_preempt3-21ksoftirqd/023:44:450
81770,0rcu_preempt3-21ksoftirqd/019:14:460
81770,0rcu_preempt19-21ksoftirqd/121:10:191
81750,0rcu_preempt3-21ksoftirqd/023:29:430
81750,0rcu_preempt3-21ksoftirqd/021:30:020
81750,0rcu_preempt3-21ksoftirqd/019:44:240
81750,0rcu_preempt3-21ksoftirqd/019:44:240
81750,0rcu_preempt3-21ksoftirqd/000:24:230
81750,0rcu_preempt28704-1kworker/0:1H00:29:240
81750,0rcu_preempt19-21ksoftirqd/122:40:351
81750,0rcu_preempt19-21ksoftirqd/121:24:501
81740,0rcu_preempt3-21ksoftirqd/023:07:470
81740,0rcu_preempt3-21ksoftirqd/021:39:380
81740,0rcu_preempt3-21ksoftirqd/020:44:350
81740,0rcu_preempt3-21ksoftirqd/020:04:550
81740,0rcu_preempt19-21ksoftirqd/121:17:371
81740,0rcu_preempt19-21ksoftirqd/121:17:371
81730,0rcu_preempt3-21ksoftirqd/023:24:490
81730,0rcu_preempt3-21ksoftirqd/019:59:570
81730,0rcu_preempt3-21ksoftirqd/019:19:520
81730,0rcu_preempt3-21ksoftirqd/019:09:500
81730,0rcu_preempt3-21ksoftirqd/000:04:360
81730,0rcu_preempt19-21ksoftirqd/100:19:251
81720,0rcu_preempt3-21ksoftirqd/023:59:240
81720,0rcu_preempt3-21ksoftirqd/023:14:370
81720,0rcu_preempt3-21ksoftirqd/021:14:420
81720,0rcu_preempt3-21ksoftirqd/021:14:420
81720,0rcu_preempt3-21ksoftirqd/020:54:520
81720,0rcu_preempt3-21ksoftirqd/020:54:520
81720,0rcu_preempt19-21ksoftirqd/123:28:221
81710,0rcu_preempt19-21ksoftirqd/122:29:221
81710,0rcu_preempt19-21ksoftirqd/119:24:421
81710,0rcu_preempt0-21swapper/122:15:581
81700,0rcu_preempt3-21ksoftirqd/023:23:090
81700,0rcu_preempt3-21ksoftirqd/023:23:090
81700,0rcu_preempt3-21ksoftirqd/000:09:540
81700,0rcu_preempt19-21ksoftirqd/121:30:381
81680,0rcu_preempt3-21ksoftirqd/022:14:420
81680,0rcu_preempt0-21swapper/123:31:301
81670,0rcu_preempt3-21ksoftirqd/022:09:510
81670,0rcu_preempt3-21ksoftirqd/020:09:400
81670,0rcu_preempt13413-21kworker/1:123:02:571
81670,0rcu_preempt13413-21kworker/1:122:58:111
81660,0rcu_preempt19-21ksoftirqd/123:14:441
81660,0rcu_preempt12407-1kworker/0:2H22:04:230
116772660,0sleep19950irq/345-484840023:23:021
116772660,0sleep19950irq/345-484840023:23:021
81650,0rcu_preempt13413-21kworker/1:122:04:591
81640,0rcu_preempt3-21ksoftirqd/020:29:530
81640,0rcu_preempt19-21ksoftirqd/119:09:351
81630,0rcu_preempt3-21ksoftirqd/023:39:520
81630,0rcu_preempt3-21ksoftirqd/023:39:520
81630,0rcu_preempt3-21ksoftirqd/022:19:340
81630,0rcu_preempt3-21ksoftirqd/020:19:580
81620,0rcu_preempt3-21ksoftirqd/022:59:360
81620,0rcu_preempt3-21ksoftirqd/022:44:480
81620,0rcu_preempt3-21ksoftirqd/022:34:530
81620,0rcu_preempt3-21ksoftirqd/021:21:070
81620,0rcu_preempt3-21ksoftirqd/021:21:070
81620,0rcu_preempt3-21ksoftirqd/019:49:360
81610,0rcu_preempt19-21ksoftirqd/122:09:231
81610,0rcu_preempt19-21ksoftirqd/121:49:501
81600,0rcu_preempt3-21ksoftirqd/020:14:410
81600,0rcu_preempt3-21ksoftirqd/020:14:410
81600,0rcu_preempt19-21ksoftirqd/123:38:431
81590,0rcu_preempt3-21ksoftirqd/020:39:540
81590,0rcu_preempt0-21swapper/121:34:321
81570,0rcu_preempt19-21ksoftirqd/122:45:021
81560,0rcu_preempt3-21ksoftirqd/020:59:400
81560,0rcu_preempt3-21ksoftirqd/020:24:370
81560,0rcu_preempt19-21ksoftirqd/123:39:461
81560,0rcu_preempt19-21ksoftirqd/123:39:461
81550,0rcu_preempt3-21ksoftirqd/020:49:230
81550,0rcu_preempt19-21ksoftirqd/119:56:091
81540,0rcu_preempt24709-1kworker/0:4H21:04:550
81540,0rcu_preempt19-21ksoftirqd/123:59:371
81540,0rcu_preempt19-21ksoftirqd/123:04:441
81520,0rcu_preempt19-21ksoftirqd/123:48:411
81510,0rcu_preempt24647-1kworker/1:1H22:19:361
81510,0rcu_preempt19-21ksoftirqd/119:34:381
81510,0rcu_preempt19-21ksoftirqd/119:34:381
81500,0rcu_preempt19-21ksoftirqd/123:51:511
81490,0rcu_preempt3-21ksoftirqd/020:34:480
81490,0rcu_preempt3-21ksoftirqd/020:34:480
81490,0rcu_preempt19-21ksoftirqd/123:55:401
81490,0rcu_preempt19-21ksoftirqd/122:50:321
81480,0rcu_preempt19-21ksoftirqd/100:04:531
81470,0rcu_preempt3-21ksoftirqd/019:04:470
81470,0rcu_preempt24800-21apt-get19:04:321
170632470,0sleep19950irq/345-484840000:09:591
81460,0rcu_preempt19-21ksoftirqd/120:24:501
81460,0rcu_preempt19-21ksoftirqd/100:15:421
81460,0rcu_preempt0-21swapper/121:24:191
81460,0rcu_preempt0-21swapper/121:24:191
9950450,0irq/345-48484003348-21ssh22:30:341
81440,0rcu_preempt19-21ksoftirqd/122:04:091
81430,0rcu_preempt19-21ksoftirqd/121:54:421
81430,0rcu_preempt19-21ksoftirqd/121:44:381
81430,0rcu_preempt19-21ksoftirqd/100:24:451
81420,0rcu_preempt28652-21diskstats20:54:411
81420,0rcu_preempt28652-21diskstats20:54:411
81420,0rcu_preempt27480-21ntp_states20:49:521
81420,0rcu_preempt19-21ksoftirqd/122:36:301
81420,0rcu_preempt19-21ksoftirqd/119:59:281
81420,0rcu_preempt19-21ksoftirqd/100:29:441
81420,0rcu_preempt13413-21kworker/1:100:37:471
9950410,0irq/345-48484000-21swapper/119:49:231
81410,0rcu_preempt3868-21apt-get19:39:351
81410,0rcu_preempt3868-21apt-get19:39:351
81410,0rcu_preempt19-21ksoftirqd/120:14:531
81410,0rcu_preempt19-21ksoftirqd/120:14:531
81380,0rcu_preempt19-21ksoftirqd/121:09:101
81380,0rcu_preempt19-21ksoftirqd/120:29:571
81380,0rcu_preempt19-21ksoftirqd/119:49:361
81360,0rcu_preempt19-21ksoftirqd/120:59:241
81360,0rcu_preempt19-21ksoftirqd/120:45:051
81360,0rcu_preempt19-21ksoftirqd/119:22:101
81360,0rcu_preempt19-21ksoftirqd/119:19:121
81350,0rcu_preempt24111-21munin-node1
81350,0rcu_preempt19-21ksoftirqd/120:19:541
81350,0rcu_preempt19-21ksoftirqd/120:09:391
81340,0rcu_preempt19-21ksoftirqd/120:34:261
81340,0rcu_preempt19-21ksoftirqd/120:34:261
10050320,0irq/346-484840024331-1kworker/1:6H19:29:581
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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