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2026-03-17 - 17:40
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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 Tue Mar 17, 2026 12:44:26)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1598227300,9sleep30-21swapper/307:05:083
159879911069,35cyclictest0-21swapper/208:55:362
159879911069,35cyclictest0-21swapper/208:55:362
159879910744,12cyclictest0-21swapper/207:55:252
159879910645,11cyclictest0-21swapper/212:10:072
14651210414,59sleep014684-21cut07:00:290
3071021030,8sleep30-21swapper/310:10:253
159879910257,12cyclictest13277-21mailstats09:40:402
159879910257,12cyclictest13277-21mailstats09:40:402
15987991003,42cyclictest24398-21latency_hist10:00:062
1598799982,41cyclictest27447-21grep07:35:402
15979999816,72cyclictest10811-21apt-get11:25:191
1454329711,60sleep214590-21ls07:00:232
15967999650,15cyclictest58-21kcompactd007:20:040
1597999933,58cyclictest32665-21ssh09:20:451
1597999918,54cyclictest20188-21cstates07:15:441
15979999064,17cyclictest19838-21latency_hist07:15:071
15967998966,16cyclictest9368-21sh12:15:380
15967998851,15cyclictest181rcu_preempt07:30:190
15987998766,16cyclictest14192-21timerandwakeup08:35:382
1599299864,40cyclictest0-21swapper/309:30:213
15987998660,16cyclictest0-21swapper/207:50:052
15987998660,16cyclictest0-21swapper/207:50:052
15979998623,50cyclictest0-21swapper/110:15:141
15987998567,11cyclictest0-21swapper/209:10:312
15987998561,13cyclictest0-21swapper/208:55:062
15967998557,17cyclictest0-21swapper/007:20:310
15987998464,15cyclictest15960-21cyclictest10:20:322
1596799844,67cyclictest29086-21fschecks_count11:55:250
15967998445,12cyclictest181rcu_preempt10:35:150
15987998362,14cyclictest30547-21sh10:10:192
15979998352,22cyclictest5929-21latency_hist09:30:061
1596799833,58cyclictest10929-21ssh11:25:310
15987998262,14cyclictest18728-21fschecks_count09:50:262
1597999828,34cyclictest0-21swapper/110:10:391
15979998256,19cyclictest31427-21cstates07:50:211
1597999823,66cyclictest6480-21apt-get09:30:211
15967998264,10cyclictest0-21swapper/009:15:140
15967998252,12cyclictest181rcu_preempt11:15:170
15992998113,41cyclictest0-21swapper/311:25:203
15987998162,11cyclictest0-21swapper/210:26:582
15987998158,16cyclictest11507-21ssh10:31:432
15987998155,19cyclictest17270-21kworker/u17:0+events_unbound09:50:032
15987998154,19cyclictest8496-21sh12:15:182
15987998146,11cyclictest181rcu_preempt11:40:182
15987998143,9cyclictest181rcu_preempt11:30:152
15979998153,20cyclictest31925-21latency_hist09:20:071
15967998165,11cyclictest14968-21ntp_offset12:25:330
15987998063,12cyclictest1362-21kworker/u17:2-rpciod12:13:072
15987998061,11cyclictest0-21swapper/207:35:072
15987998057,13cyclictest0-21swapper/208:10:072
1598799802,49cyclictest26043-21ssh11:50:262
15979998059,14cyclictest9677-21kworker/u17:2-ext4-rsv-conversion08:55:071
15979998056,13cyclictest0-21swapper/112:10:261
1596799806,60cyclictest3340-21ssh09:25:280
15987997958,15cyclictest58-21kcompactd009:29:462
15987997956,14cyclictest0-21swapper/208:45:062
15987997951,9cyclictest181rcu_preempt10:10:072
1599299786,51cyclictest0-21swapper/309:20:453
15987997860,11cyclictest0-21swapper/211:10:072
15987997858,11cyclictest0-21swapper/207:30:062
15987997856,12cyclictest0-21swapper/210:45:072
15987997847,18cyclictest15960-21cyclictest09:07:252
1598799783,41cyclictest22662-21ntp_states10:50:362
15979997858,14cyclictest15788-21threads08:40:391
15979997845,23cyclictest15823-21kworker/u18:1+nfsiod12:07:111
15979997838,32cyclictest22039-21ssh10:50:151
15967997858,13cyclictest15960-21cyclictest09:41:060
15967997858,13cyclictest15960-21cyclictest09:41:060
15967997858,12cyclictest31294-21kworker/u19:0+events_unbound10:35:060
15967997854,16cyclictest27762-21ssh11:53:050
15987997758,12cyclictest0-21swapper/208:10:372
15987997756,9cyclictest0-21swapper/210:15:242
15987997756,14cyclictest6298-21kworker/u17:1-nfsiod11:20:432
15987997748,20cyclictest2627-21tail11:10:412
15987997745,11cyclictest181rcu_preempt09:30:402
15979997728,30cyclictest10185-21apt-get08:25:201
15979997716,30cyclictest11931-21ntpq12:20:321
15979997716,30cyclictest11931-21ntpq12:20:321
15967997763,9cyclictest18349-21ssh11:36:520
15967997755,14cyclictest5452-21ssh12:10:200
1596799775,34cyclictest9808-21fschecks_time09:35:260
15967997753,15cyclictest200-21systemd-journal10:16:170
15967997744,8cyclictest181rcu_preempt12:06:250
15967997744,12cyclictest22565-21kworker/u18:1-ext4-rsv-conversion08:35:390
15967997736,29cyclictest2295-21cut08:00:240
15987997657,9cyclictest0-21swapper/207:10:312
15987997655,12cyclictest0-21swapper/210:40:062
15987997641,12cyclictest181rcu_preempt07:50:392
15979997659,11cyclictest298-21in:imuxsock09:10:041
15979997652,16cyclictest18727-21fschecks_count09:50:261
15979997642,24cyclictest32120-21cut12:00:261
15979997642,24cyclictest32120-21cut12:00:261
15967997658,8cyclictest0-21swapper/009:45:400
1596799763,30cyclictest23926-21processes09:05:360
15967997630,29cyclictest17908-21timerandwakeup07:10:140
1599299752,59cyclictest26237-21chrt09:10:183
15987997559,8cyclictest0-21swapper/211:00:132
15987997556,10cyclictest0-21swapper/211:00:062
15987997556,10cyclictest0-21swapper/211:00:062
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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