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2026-03-30 - 18:33

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 792 highest latencies:
System rackaslot5s.osadl.org (updated Mon Mar 30, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811180,0rcu_preempt19-21ksoftirqd/110:43:201
811150,0rcu_preempt19-21ksoftirqd/111:21:511
811040,0rcu_preempt19-21ksoftirqd/111:36:081
811030,0rcu_preempt851-21rngd09:19:151
811020,0rcu_preempt54-21kswapd010:09:140
811020,0rcu_preempt19-21ksoftirqd/111:06:181
81980,0rcu_preempt19-21ksoftirqd/110:51:311
81970,0rcu_preempt19-21ksoftirqd/110:29:061
81960,0rcu_preempt19-21ksoftirqd/112:17:411
81950,0rcu_preempt54-21kswapd011:40:441
81930,0rcu_preempt19-21ksoftirqd/109:27:001
81930,0rcu_preempt19-21ksoftirqd/109:13:561
81930,0rcu_preempt19-21ksoftirqd/107:39:141
81930,0rcu_preempt17490-21kworker/1:210:12:521
81920,0rcu_preempt19-21ksoftirqd/112:09:061
81890,0rcu_preempt19-21ksoftirqd/109:46:031
81880,0rcu_preempt3-21ksoftirqd/009:24:120
81880,0rcu_preempt19-21ksoftirqd/112:07:441
81870,0rcu_preempt19-21ksoftirqd/111:09:041
81870,0rcu_preempt19-21ksoftirqd/110:06:091
81860,0rcu_preempt19-21ksoftirqd/109:52:401
81860,0rcu_preempt0-21swapper/109:54:361
81850,0rcu_preempt851-21rngd11:51:571
81850,0rcu_preempt54-21kswapd011:45:021
81830,0rcu_preempt17490-21kworker/1:212:27:071
81810,0rcu_preempt19-21ksoftirqd/109:34:191
81800,0rcu_preempt0-21swapper/110:54:531
81790,0rcu_preempt19-21ksoftirqd/111:32:351
81780,0rcu_preempt19-21ksoftirqd/108:25:161
81780,0rcu_preempt0-21swapper/109:29:081
81770,0rcu_preempt19-21ksoftirqd/109:59:461
81750,0rcu_preempt54-21kswapd012:22:381
81750,0rcu_preempt54-21kswapd012:22:381
81750,0rcu_preempt19-21ksoftirqd/109:43:211
81750,0rcu_preempt0-21swapper/110:15:481
81740,0rcu_preempt19-21ksoftirqd/110:24:091
81740,0rcu_preempt19-21ksoftirqd/109:12:361
81720,0rcu_preempt19-21ksoftirqd/107:52:411
81720,0rcu_preempt19-21ksoftirqd/107:24:201
81710,0rcu_preempt19-21ksoftirqd/111:55:401
81700,0rcu_preempt54-21kswapd010:20:301
81690,0rcu_preempt19-21ksoftirqd/108:04:111
1559099694,0cyclictest9254-1kworker/0:0H11:08:560
81680,0rcu_preempt19-21ksoftirqd/110:44:271
81670,0rcu_preempt19-21ksoftirqd/111:24:521
81670,0rcu_preempt19-21ksoftirqd/108:14:141
81660,0rcu_preempt19-21ksoftirqd/112:35:001
81660,0rcu_preempt19-21ksoftirqd/108:41:421
1559099665,0cyclictest29100-1kworker/0:1H11:29:170
1559099655,0cyclictest4278-1kworker/0:2H11:04:360
81640,0rcu_preempt19-21ksoftirqd/112:00:511
1559099633,0cyclictest0-21swapper/010:57:090
1559099632,0cyclictest32181-21apt-get10:23:570
1559099632,0cyclictest0-21swapper/011:22:310
81620,0rcu_preempt19-21ksoftirqd/110:37:111
81620,0rcu_preempt19-21ksoftirqd/108:21:541
15590996212,0cyclictest30049-21munin-node0
1559099621,0cyclictest0-21swapper/010:35:360
81610,0rcu_preempt3-21ksoftirqd/011:35:100
81610,0rcu_preempt19-21ksoftirqd/111:13:581
81610,0rcu_preempt19-21ksoftirqd/111:02:091
1559099613,0cyclictest0-21swapper/011:03:290
1559099612,0cyclictest0-21swapper/009:35:050
1559099607,0cyclictest26645-21munin-node0
1559099602,0cyclictest23335-21munin-node0
1559099601,0cyclictest32262-21munin-node0
81590,0rcu_preempt19-21ksoftirqd/108:12:541
81590,0rcu_preempt19-21ksoftirqd/107:13:571
81590,0rcu_preempt19-21ksoftirqd/107:09:071
1559099598,0cyclictest25412-21sendmail07:38:450
1559099598,0cyclictest25412-21sendmail07:38:450
1559099592,0cyclictest14204-21munin-node0
1559099592,0cyclictest0-21swapper/012:23:590
1559099592,0cyclictest0-21swapper/010:05:060
1559099592,0cyclictest0-21swapper/007:09:070
15590995913,0cyclictest7471-21munin-node0
1559099591,0cyclictest29158-21chrt09:14:240
1559099591,0cyclictest0-21swapper/009:43:310
15590995910,0cyclictest8016-21ssh12:09:340
81580,0rcu_preempt19-21ksoftirqd/112:33:231
81580,0rcu_preempt19-21ksoftirqd/108:29:051
81580,0rcu_preempt19-21ksoftirqd/108:02:251
1559099586,0cyclictest18108-1kworker/0:1H12:21:420
1559099586,0cyclictest18108-1kworker/0:1H12:21:420
81570,0rcu_preempt19-21ksoftirqd/107:56:241
1559099575,0cyclictest23842-21latency_hist11:53:450
1559099573,0cyclictest0-21swapper/010:49:110
1559099572,0cyclictest1470-21runrttasks09:28:530
1559099572,0cyclictest0-21swapper/009:43:510
1559099572,0cyclictest0-21swapper/009:12:360
1559099571,0cyclictest32160-21munin-node0
1559099567,0cyclictest0-21swapper/012:02:120
1559099562,0cyclictest18873-21ping07:43:580
15590995615,0cyclictest0-21swapper/011:23:550
1559099561,0cyclictest0-21swapper/010:19:020
1559099552,0cyclictest54-21kswapd009:54:270
15590995511,0cyclictest11494-21ssh12:13:570
1559099551,0cyclictest19732-21munin-node0
1559099551,0cyclictest18873-21ping07:28:590
1559099551,0cyclictest18216-21rm11:14:220
1559099551,0cyclictest0-21swapper/010:28:520
15590995510,0cyclictest0-21swapper/012:05:430
1559099549,0cyclictest24838-21wc11:54:100
1559099542,0cyclictest0-21swapper/010:43:120
15590995412,0cyclictest5643-21unixbench_singl08:14:150
1559099541,0cyclictest18873-21ping07:23:560
81530,0rcu_preempt15589-21cyclictest08:34:021
1559099538,0cyclictest15504-21unixbench_singl08:44:130
1559099532,0cyclictest9503-21ssh11:39:010
1559099532,0cyclictest0-21swapper/009:04:000
15590995314,0cyclictest0-21swapper/009:19:030
1559099531,0cyclictest1470-21runrttasks08:34:300
1559099531,0cyclictest0-21swapper/010:44:260
81520,0rcu_preempt19-21ksoftirqd/109:04:041
81520,0rcu_preempt19-21ksoftirqd/108:49:011
1559099522,0cyclictest19298-21seq08:58:450
1559099521,0cyclictest9980-21iwlist08:29:070
1559099512,0cyclictest7927-21munin-node0
1559099512,0cyclictest0-21swapper/008:39:070
81500,0rcu_preempt19-21ksoftirqd/108:59:121
81500,0rcu_preempt19-21ksoftirqd/108:54:111
1559099506,0cyclictest18873-21ping07:43:460
1559099502,0cyclictest18875-21munin-run07:18:450
1559099502,0cyclictest0-21swapper/008:08:460
1559099492,0cyclictest28853-21taskset07:48:570
15590994910,0cyclictest0-21swapper/008:22:260
81480,0rcu_preempt19-21ksoftirqd/107:48:411
81480,0rcu_preempt19-21ksoftirqd/107:23:461
1559099482,0cyclictest0-21swapper/008:48:580
1559099482,0cyclictest0-21swapper/007:58:460
81470,0rcu_preempt3-21ksoftirqd/007:04:090
1559099471,0cyclictest1316-21sshd08:07:060
81460,0rcu_preempt19-21ksoftirqd/108:44:051
81460,0rcu_preempt19-21ksoftirqd/107:34:231
81460,0rcu_preempt19-21ksoftirqd/107:34:231
81460,0rcu_preempt19-21ksoftirqd/107:31:271
15590994612,0cyclictest0-21swapper/008:58:460
81400,0rcu_preempt19-21ksoftirqd/107:06:481
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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