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2026-03-11 - 18:54
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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 rack0slot2.osadl.org (updated Wed Mar 11, 2026 12:43:34)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
18713972950,1sleep50-21swapper/511:09:215
18052382940,1sleep71805241-21cut10:39:267
1336204995247,2cyclictest1368898-21kworker/u16:2+flush-8:007:44:036
1336204994744,2cyclictest1843381-21kworker/u16:3+flush-8:012:04:306
133560624736,8sleep50-21swapper/506:59:435
133560624736,8sleep50-21swapper/506:59:435
17125982460,0sleep71712599-21rm10:02:237
133620599450,43cyclictest650-21systemd-journal08:59:027
1336204994543,2cyclictest1843380-21kworker/u16:0+flush-8:011:59:026
1336194994542,2cyclictest1843380-21kworker/u16:0+flush-8:012:29:024
1336204994442,2cyclictest1263625-21kworker/u16:1+flush-8:008:19:026
133575724434,7sleep60-21swapper/607:01:536
133575724434,7sleep60-21swapper/607:01:536
133620599410,39cyclictest650-21systemd-journal09:38:577
1336204994138,2cyclictest1326792-21kworker/u16:3+flush-8:007:19:026
1336194994137,3cyclictest1795466-21kworker/u16:2+flush-8:010:44:284
13276422403,31sleep70-21swapper/706:59:217
13276422403,31sleep70-21swapper/706:59:217
1336204993936,2cyclictest1843380-21kworker/u16:0+flush-8:012:14:376
1336204993936,2cyclictest1737606-21kworker/u16:1+flush-8:011:09:216
133620599340,32cyclictest1473622-21latency_hist08:14:027
1336204993432,2cyclictest1967016-21kworker/u16:1+flush-8:012:19:326
133568823424,7sleep40-21swapper/407:00:544
133568823424,7sleep40-21swapper/407:00:544
1336204993230,2cyclictest1737606-21kworker/u16:1+events_unbound10:14:166
1336204993229,3cyclictest1593616-21kworker/u16:3+flush-8:009:26:296
1336204993229,3cyclictest1573653-21kworker/u16:0+events_unbound09:49:286
13675062300,0chrt1367489-21needreboot07:14:277
1336204993028,2cyclictest1593616-21kworker/u16:3+events_unbound10:04:206
1336204992825,2cyclictest1520656-21kworker/u16:1+flush-8:008:54:026
18934012270,1chrt1893399-21ssh11:18:217
1336205992725,2cyclictest124-21kswapd012:23:017
1336204992725,2cyclictest1484703-21kworker/u16:3+events_unbound08:23:396
1336204992725,2cyclictest1454288-21kworker/u16:0+flush-8:008:09:336
1336204992725,2cyclictest1263625-21kworker/u16:1+flush-8:007:19:206
1336205992620,5cyclictest650-21systemd-journal07:39:037
1336204992523,2cyclictest1593616-21kworker/u16:3+events_unbound09:29:276
18022942240,1chrt0-21swapper/410:39:234
1336205992419,4cyclictest650-21systemd-journal11:28:577
1336204992422,2cyclictest1843380-21kworker/u16:0+events_unbound11:59:326
1336205992319,3cyclictest650-21systemd-journal08:33:577
133620599230,22cyclictest6471-21gnome-software09:26:157
1336204992321,2cyclictest1593616-21kworker/u16:3+flush-8:009:44:386
1336204992220,2cyclictest1843380-21kworker/u16:0+events_unbound11:19:366
1336204992220,2cyclictest1326792-21kworker/u16:3+flush-8:007:34:336
1336205992117,3cyclictest1769739-21kthreadcore10:24:257
1336204992119,2cyclictest1737606-21kworker/u16:1+flush-8:010:44:026
17380082200,1chrt1738006-21ssh10:14:097
1336205992015,4cyclictest2073727-21latency_hist12:34:027
1336204992019,1cyclictest1795466-21kworker/u16:2+flush-8:010:44:256
1336204992018,2cyclictest1520656-21kworker/u16:1+flush-8:009:04:176
1336205991916,2cyclictest2057583-21kthreadcore12:24:237
1336204991916,2cyclictest1263625-21kworker/u16:1+flush-8:007:24:286
1336204991916,2cyclictest1263625-21kworker/u16:1+flush-8:007:24:286
1336205991818,0cyclictest0-21swapper/710:30:147
1336204991816,2cyclictest1843380-21kworker/u16:0+flush-8:011:29:436
1336204991816,2cyclictest1843380-21kworker/u16:0+flush-8:011:29:436
133620599175,4cyclictest2002816-21tune2fs12:04:157
1336204991715,2cyclictest1879585-21kworker/u16:2+events_unbound11:43:036
1336194991716,1cyclictest0-21swapper/408:29:444
1336194991716,1cyclictest0-21swapper/408:00:034
1336194991716,1cyclictest0-21swapper/407:40:354
1336204991614,2cyclictest1665523-21kworker/u16:4+flush-8:009:55:076
1336204991614,2cyclictest1573653-21kworker/u16:0+events_unbound09:39:366
1336204991613,2cyclictest1484703-21kworker/u16:3+flush-8:008:34:026
1336194991615,1cyclictest0-21swapper/412:32:154
1336194991615,1cyclictest0-21swapper/409:00:284
1336194991615,1cyclictest0-21swapper/407:06:484
133620599158,6cyclictest0-21swapper/709:29:267
1336205991513,2cyclictest1569210-21diskmemload09:39:087
1336205991512,2cyclictest1267-21snmpd11:40:097
1336204991513,2cyclictest1843380-21kworker/u16:0+events_unbound11:44:316
1336204991513,2cyclictest1737606-21kworker/u16:1+events_unbound10:36:526
1336204991513,2cyclictest1573653-21kworker/u16:0+events_unbound10:24:026
1336204991512,2cyclictest1573653-21kworker/u16:0+flush-8:010:29:216
133620499150,1cyclictest0-21swapper/611:34:156
1336199991514,1cyclictest0-21swapper/509:56:235
133619999150,1cyclictest0-21swapper/509:25:015
133619999150,15cyclictest0-21swapper/510:46:135
133619999150,15cyclictest0-21swapper/509:46:375
133619999150,0cyclictest0-21swapper/512:20:585
1336194991515,0cyclictest0-21swapper/410:51:394
1336194991514,1cyclictest0-21swapper/408:44:054
1336194991512,3cyclictest5755-21JS21:50:164
133620599149,4cyclictest1965697-21latency_hist11:49:027
133620599147,6cyclictest0-21swapper/711:55:357
133620599147,6cyclictest0-21swapper/710:19:147
133620599147,6cyclictest0-21swapper/710:09:187
133620599147,6cyclictest0-21swapper/709:14:317
133620599146,7cyclictest0-21swapper/712:15:017
133620599146,7cyclictest0-21swapper/710:04:037
133620599146,7cyclictest0-21swapper/709:10:117
133620599145,8cyclictest0-21swapper/712:12:337
133620599145,8cyclictest0-21swapper/712:12:337
133620599145,8cyclictest0-21swapper/709:08:037
133620599143,9cyclictest1991275-21irqcore11:59:187
1336205991411,2cyclictest1491830-21ntpq08:19:287
1336205991411,2cyclictest0-21swapper/711:09:027
1336205991410,3cyclictest1854766-21ntpq10:59:337
133620599140,13cyclictest1833701-21turbostat10:54:017
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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