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2026-03-12 - 16:02
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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
Characteristics of the 100 highest latencies:
System rackdslot0.osadl.org (updated Thu Mar 12, 2026 12:45:58)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1109899300,27cyclictest0-21swapper/008:35:290
1109899270,2cyclictest31675-21cpuspeed_turbos08:40:140
1109899240,22cyclictest20008-21man-db07:25:000
11098992316,6cyclictest7289-21cut11:45:010
1109899230,22cyclictest843-21systemd-network12:21:220
1109899230,16cyclictest9845-21sed09:55:010
1110799225,4cyclictest0-21swapper/210:11:432
1109899222,1cyclictest0-21swapper/011:20:180
11098992214,7cyclictest4056-21if_enp1s012:35:140
1109899221,16cyclictest6343-21latency07:55:160
1109899220,2cyclictest19598-21grep09:15:110
1109899220,2cyclictest11910-21cat08:05:130
1109899220,1cyclictest0-21swapper/012:25:120
1109899220,1cyclictest0-21swapper/011:10:010
1109899220,1cyclictest0-21swapper/010:09:480
1109899220,1cyclictest0-21swapper/010:09:470
1109899220,15cyclictest0-21swapper/012:10:140
11107992114,4cyclictest14562-21fschecks_count11:00:122
1110299214,1cyclictest0-21swapper/112:02:011
11102992121,0cyclictest0-21swapper/107:10:151
11102992118,2cyclictest3225-21mailstats09:40:211
11098992114,6cyclictest3120-21hddtemp_smartct07:50:140
1109899211,1cyclictest0-21swapper/008:55:010
1109899210,2cyclictest9304-21nfsd408:55:190
1109899210,2cyclictest815-21grep10:35:170
1109899210,2cyclictest6589-21chrt09:46:060
1109899210,2cyclictest4190-21perf11:40:000
1109899210,2cyclictest30567-21cat11:30:000
1109899210,2cyclictest1079-21cups-browsed08:20:200
1109899210,20cyclictest26741-21/usr/sbin/munin08:30:130
1109899210,20cyclictest20178-21cat10:10:200
1109899210,20cyclictest19844-21readlink12:05:200
1109899210,1cyclictest0-21swapper/011:15:120
1109899210,1cyclictest0-21swapper/009:40:210
1109899210,1cyclictest0-21swapper/009:09:230
1109899210,16cyclictest30025-21hddtemp_smartct10:30:140
1109899210,16cyclictest0-21swapper/007:35:060
1109899210,15cyclictest9828-21grep10:50:180
1109899210,15cyclictest5286-21latency_hist08:50:010
1109899210,15cyclictest0-21swapper/012:30:170
1109899210,15cyclictest0-21swapper/010:16:210
1110299202,1cyclictest0-21swapper/109:22:391
11102992016,3cyclictest0-21swapper/109:45:171
1110299200,19cyclictest843-21systemd-network11:19:021
11098992014,5cyclictest0-21swapper/011:55:120
11098992014,5cyclictest0-21swapper/011:10:190
11098992014,5cyclictest0-21swapper/009:57:240
11098992014,5cyclictest0-21swapper/009:00:120
1109899200,1cyclictest17970-21tr08:15:150
1109899200,19cyclictest149382chrt10:03:030
1109899200,19cyclictest0-21swapper/011:45:260
1109899200,19cyclictest0-21swapper/010:50:000
1109899200,15cyclictest30174-21seq09:30:520
1109899200,15cyclictest0-21swapper/011:00:010
1109899200,15cyclictest0-21swapper/007:40:170
1109899200,14cyclictest0-21swapper/009:20:130
1109899200,14cyclictest0-21swapper/008:02:020
1110799192,16cyclictest0-21swapper/207:53:272
11107991916,2cyclictest13516-21tr11:00:002
11107991915,3cyclictest399-20systemd-journal08:55:012
11107991915,2cyclictest32039-21tr07:45:132
1110799191,17cyclictest1481-21snapd07:35:102
1110799190,5cyclictest0-21swapper/210:49:232
1110799190,17cyclictest0-21swapper/208:54:372
1110299192,16cyclictest14965-21latency09:05:161
11102991915,3cyclictest26786-21munin-plugin-st12:20:001
11098991914,4cyclictest0-21swapper/012:15:440
11098991914,4cyclictest0-21swapper/009:35:200
11098991914,4cyclictest0-21swapper/007:45:150
11098991913,6cyclictest0-21swapper/009:25:190
11098991913,5cyclictest24498-21timerandwakeup08:25:220
11098991913,5cyclictest0-21swapper/010:20:170
11098991912,6cyclictest15736-21nfsd407:15:170
1109899190,1cyclictest0-21swapper/010:40:110
1109899190,18cyclictest0-21swapper/011:50:130
1109899190,18cyclictest0-21swapper/011:50:120
1109899190,18cyclictest0-21swapper/007:31:130
1109899190,18cyclictest0-21swapper/007:11:050
1109899190,0cyclictest0-21swapper/011:02:290
1109899190,0cyclictest0-21swapper/008:10:120
1110799182,15cyclictest231062sleep212:10:392
1110799182,15cyclictest11785-21expr08:05:132
11107991814,3cyclictest0-21swapper/209:15:122
11107991813,4cyclictest870-21systemd-logind08:16:522
1110299182,1cyclictest32581-21http_loadtime07:45:151
11102991816,1cyclictest13003-21expr11:55:141
11102991816,1cyclictest0-21swapper/111:28:461
11102991815,2cyclictest0-21swapper/110:45:181
1110299181,2cyclictest5399-21if_eno111:40:151
1110299181,2cyclictest30474-21chrt09:34:521
1110299181,16cyclictest3550-21vmstat11:35:221
1110299181,11cyclictest25180-21latency_hist08:30:011
1110299180,17cyclictest0-21swapper/108:55:131
11098991814,3cyclictest0-21swapper/009:10:150
11098991814,3cyclictest0-21swapper/007:25:160
11098991813,4cyclictest0-21swapper/010:25:140
11107991715,1cyclictest21855-21cat07:25:172
11107991715,1cyclictest0-21swapper/212:25:002
11107991714,2cyclictest7478-21cpuspeed_turbos09:50:132
11107991714,2cyclictest27300-21perl10:25:142
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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