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2026-04-30 - 22:21
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Data to construct the above plot have been generated using the RT test utility cyclictest.
Unexpectedly long latencies may be caused by SMIs
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rackbslot7.osadl.org (updated Thu Apr 30, 2026 12:44:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1138621275,15sleep00-21swapper/006:58:230
118349911342,12cyclictest0-21swapper/109:27:291
11842991043,71cyclictest24184-21apt-get10:02:242
118349910442,11cyclictest0-21swapper/110:07:441
118429910364,8cyclictest181rcu_preempt09:44:072
118349910343,9cyclictest0-21swapper/112:27:401
118349910341,12cyclictest0-21swapper/110:37:381
11834991013,77cyclictest30395-21apt-get10:12:241
118229910116,47cyclictest15-21ksoftirqd/012:18:130
1183499943,60cyclictest24211-21dpkg10:02:241
1183499933,46cyclictest14419-21ssh09:47:091
1182299913,47cyclictest15-21ksoftirqd/007:57:350
1182299913,47cyclictest15-21ksoftirqd/007:57:350
11842998856,9cyclictest181rcu_preempt07:47:342
11834998852,12cyclictest181rcu_preempt08:02:191
1183499880,59cyclictest20498-21taskset09:56:471
11822998653,22cyclictest17912-21kworker/u17:2+rpciod09:07:570
11822998653,22cyclictest17912-21kworker/u17:2+rpciod09:07:570
11822998630,20cyclictest181rcu_preempt09:33:580
11842998549,10cyclictest181rcu_preempt08:47:212
11834998563,15cyclictest22598-21fschecks_time07:32:301
11834998563,15cyclictest22598-21fschecks_time07:32:301
1182299855,50cyclictest15-21ksoftirqd/011:27:330
1182299855,50cyclictest15-21ksoftirqd/011:27:330
11822998454,22cyclictest14411-21grep08:47:410
11842998356,7cyclictest181rcu_preempt10:27:202
11842998351,7cyclictest181rcu_preempt07:54:462
1182299829,35cyclictest15-21ksoftirqd/009:07:110
1182299821,38cyclictest15-21ksoftirqd/010:28:480
11842998135,35cyclictest5105-21kworker/u19:2+nfsiod11:12:112
11834998155,17cyclictest3632-21timerandwakeup08:12:431
11822998163,11cyclictest18048-21diskmemload09:21:200
11822998151,9cyclictest181rcu_preempt08:57:240
50172800,14sleep3451rcuc/310:22:443
126112800,3sleep30-21swapper/307:02:363
11842998050,11cyclictest1769-21latency_hist12:07:102
11822998063,11cyclictest8110-21ssh11:22:340
11842997947,9cyclictest181rcu_preempt10:47:102
1184299793,46cyclictest39-21ksoftirqd/211:17:212
1184299793,46cyclictest39-21ksoftirqd/211:17:212
11822997957,16cyclictest824-21latency_hist10:17:100
11822997956,15cyclictest13234-21fschecks_count10:37:290
11822997951,8cyclictest0-21swapper/012:02:100
11822997925,24cyclictest181rcu_preempt11:17:230
11822997925,24cyclictest181rcu_preempt11:17:230
11842997850,13cyclictest181rcu_preempt12:07:192
11834997861,11cyclictest5265-21kworker/u17:0-xprtiod11:12:071
11834997853,16cyclictest27122-21latency_hist07:47:111
11834997841,9cyclictest181rcu_preempt07:47:241
11822997865,9cyclictest11727-21kworker/u17:0+rpciod10:10:300
11842997755,15cyclictest298-21in:imuxsock10:35:132
11822997760,11cyclictest16328-21ssh10:42:280
11822997742,28cyclictest0-21swapper/009:52:070
11822997742,28cyclictest0-21swapper/009:52:070
11842997659,11cyclictest8453-21kworker/u17:1-xprtiod11:47:022
11842997657,14cyclictest9420-21latency_hist08:32:102
11842997657,14cyclictest27583-21kernelversion10:07:322
11842997656,14cyclictest352-21runrttasks10:57:242
11842997656,14cyclictest352-21runrttasks10:57:242
11842997655,15cyclictest17366-21latency_hist07:17:102
11822997661,9cyclictest14867-21ssh12:27:350
11822997645,23cyclictest15263-21fschecks_count08:52:290
11822997645,22cyclictest23701-21modprobe07:37:070
11822997645,22cyclictest23701-21modprobe07:37:070
11822997614,32cyclictest15-21ksoftirqd/008:37:220
11822997614,32cyclictest15-21ksoftirqd/008:37:220
11842997558,12cyclictest24624-21sh09:12:252
11842997555,15cyclictest11810-21cyclictest10:22:232
11834997553,14cyclictest2374-21systemd-journal12:09:481
1183499753,23cyclictest10054-21latency_hist09:42:111
1183499752,27cyclictest15934-21dpkg07:12:291
11822997559,10cyclictest13837-21timerandwakeup07:07:160
11822997557,12cyclictest18048-21diskmemload10:32:420
1182299755,35cyclictest15-21ksoftirqd/010:47:230
1182299755,35cyclictest15-21ksoftirqd/010:47:230
11822997546,8cyclictest181rcu_preempt12:08:570
11822997543,25cyclictest0-21swapper/010:17:300
11822997543,25cyclictest0-21swapper/010:17:300
1166727511,40sleep211674-21modprobe07:02:072
1183499749,9cyclictest28691-21ssh09:17:461
11834997460,9cyclictest30870-21kworker/u18:2+rpciod12:12:291
11822997461,9cyclictest58-21kcompactd008:14:530
11822997458,10cyclictest11810-21cyclictest09:15:470
11822997457,11cyclictest31143-21ssh11:07:230
1182299743,38cyclictest15-21ksoftirqd/007:17:420
11842997353,14cyclictest15760-21apt-config07:12:122
11842997343,21cyclictest28655-21cpuspeed11:57:232
11834997330,23cyclictest181rcu_preempt11:22:101
11834997330,23cyclictest181rcu_preempt11:22:101
1183499732,25cyclictest21573-21apt-get09:07:221
1183499732,25cyclictest21573-21apt-get09:07:221
11822997357,9cyclictest18015-21ssh09:52:300
11822997354,12cyclictest1-21systemd07:52:070
11822997352,14cyclictest11049-21latency_hist08:37:090
11822997352,14cyclictest11049-21latency_hist08:37:090
11822997345,9cyclictest181rcu_preempt09:59:190
11822997340,26cyclictest0-21swapper/010:22:280
11822997334,29cyclictest17247-21cron07:17:070
1182299732,36cyclictest28270-21diskstats11:02:270
1182299732,24cyclictest32042-21apt-get08:02:170
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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