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2025-12-10 - 08:30
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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 Wed Dec 10, 2025 00:44:34)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
307539912648,14cyclictest30740-21cyclictest22:28:420
307539912648,14cyclictest30740-21cyclictest22:28:420
29445212212,71sleep229501-21fschecks_time19:03:412
307539912046,13cyclictest0-21swapper/023:23:500
307539912046,13cyclictest0-21swapper/023:23:500
307539911748,13cyclictest1277-21timerandwakeup19:13:500
307539911748,13cyclictest1277-21timerandwakeup19:13:500
307539911650,14cyclictest207-21systemd-journal22:50:260
307539910850,13cyclictest6181-21sh21:08:450
307539910644,12cyclictest30251-21sh23:38:240
30753991053,27cyclictest207-21systemd-journal23:00:260
30753991053,27cyclictest207-21systemd-journal23:00:260
307699910138,14cyclictest0-21swapper/222:38:152
30769999740,10cyclictest10731-21timerwakeupswit23:04:472
30769999740,10cyclictest10731-21timerwakeupswit23:04:472
30769999740,10cyclictest0-21swapper/220:18:142
30769999638,8cyclictest0-21swapper/222:13:452
30769999638,8cyclictest0-21swapper/222:13:452
30769999638,12cyclictest23892-21latency_hist23:28:142
30769999638,12cyclictest23892-21latency_hist23:28:142
30753999467,20cyclictest13613-21latency_hist19:53:150
30769999335,12cyclictest0-21swapper/220:53:522
30761999131,7cyclictest181rcu_preempt21:58:151
30761999131,7cyclictest181rcu_preempt21:58:151
30769999042,10cyclictest30740-21cyclictest23:55:162
30769999037,13cyclictest11747-21sh21:18:242
3059428915,46sleep130614-21apt19:08:131
30753998865,16cyclictest9745-21ssh21:14:310
30753998642,33cyclictest17736-21kworker/u17:0+nfsiod00:21:300
30761998565,11cyclictest0-21swapper/121:43:151
30761998544,8cyclictest181rcu_preempt22:38:261
30753998457,19cyclictest27978-21sh00:28:390
30753998457,19cyclictest27978-21sh00:28:390
30761998361,14cyclictest5226-21diskmemload21:26:041
30769998251,23cyclictest7104-21threads22:58:482
30769998251,23cyclictest7104-21threads22:58:482
30769998250,23cyclictest25176-21cut20:28:332
30753998256,7cyclictest181rcu_preempt00:06:320
30753998256,7cyclictest181rcu_preempt00:06:320
30753998239,8cyclictest181rcu_preempt19:33:410
2982928215,43sleep029858-21ps19:03:560
30769998158,16cyclictest30740-21cyclictest19:29:262
30769998156,16cyclictest355-21runrttasks00:24:052
30761998164,9cyclictest0-21swapper/119:43:451
30761998164,9cyclictest0-21swapper/119:43:451
30761998160,11cyclictest0-21swapper/122:18:491
30761998140,16cyclictest58-21kcompactd019:53:331
30769998058,16cyclictest18925-21latency20:08:412
30769998058,16cyclictest18925-21latency20:08:412
3076999802,41cyclictest9821-21apt-get23:58:312
30761998062,11cyclictest0-21swapper/121:48:151
30761998059,10cyclictest0-21swapper/121:03:341
30761997963,9cyclictest0-21swapper/121:14:301
30761997960,9cyclictest0-21swapper/100:28:441
30761997960,9cyclictest0-21swapper/100:28:441
30761997938,19cyclictest31647-21ssh00:34:401
30753997961,13cyclictest30740-21cyclictest22:39:060
30753997959,13cyclictest19208-21rm00:13:410
30753997950,7cyclictest0-21swapper/021:58:480
30769997848,23cyclictest24361-21latency_hist00:23:142
30769997842,13cyclictest181rcu_preempt23:12:152
30753997860,9cyclictest0-21swapper/021:28:290
30753997860,9cyclictest0-21swapper/021:28:290
30753997856,11cyclictest0-21swapper/000:38:140
30753997855,7cyclictest929950mandb23:58:130
30753997850,11cyclictest314-21in:imuxsock21:53:130
30753997840,8cyclictest0-21swapper/021:43:420
30769997758,14cyclictest11804-21latency_hist19:48:152
30769997745,13cyclictest9516-21ssh21:14:242
30761997758,8cyclictest0-21swapper/123:34:371
30761997758,13cyclictest314-21in:imuxsock19:53:121
30753997748,18cyclictest5403-21latency_hist21:08:160
30769997650,8cyclictest181rcu_preempt22:33:132
30769997650,8cyclictest181rcu_preempt22:33:132
30761997659,10cyclictest0-21swapper/123:08:481
30761997658,9cyclictest0-21swapper/122:53:141
30753997655,10cyclictest0-21swapper/020:18:150
30753997653,16cyclictest30740-21cyclictest00:11:430
30753997651,14cyclictest0-21swapper/023:18:300
30753997645,24cyclictest0-21swapper/022:48:040
30753997645,24cyclictest0-21swapper/022:48:040
30753997630,7cyclictest0-21swapper/023:13:250
30769997543,24cyclictest5104-21latency_hist19:28:162
30761997560,8cyclictest0-21swapper/123:48:401
30761997555,10cyclictest0-21swapper/122:34:221
30761997535,8cyclictest0-21swapper/123:23:361
30761997535,8cyclictest0-21swapper/123:23:361
30753997560,11cyclictest0-21swapper/020:03:140
30753997556,13cyclictest1341-21ntpq23:43:410
30769997454,14cyclictest207-21systemd-journal19:13:132
30769997453,12cyclictest0-21swapper/220:58:352
30761997458,9cyclictest0-21swapper/100:13:331
30761997455,9cyclictest0-21swapper/123:08:151
30761997455,9cyclictest0-21swapper/123:08:151
30761997454,10cyclictest0-21swapper/121:10:051
30753997457,8cyclictest0-21swapper/020:43:470
30753997457,8cyclictest0-21swapper/020:43:470
30753997454,13cyclictest11925-21latency_hist19:48:140
30753997454,13cyclictest11925-21latency_hist19:48:140
30753997454,12cyclictest11198-21sh23:05:520
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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