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2026-09-08 - 10:03
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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 Sep 08, 2026 00:44:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
31946217811,50sleep132002-21/usr/sbin/munin19:05:231
31290215812,105sleep231291-21/usr/sbin/munin19:04:512
2816821160,6sleep10-21swapper/123:25:171
3049911283,18cyclictest343-21runrttasks20:44:441
3237221106,16sleep00-21swapper/019:06:160
309991065,81cyclictest10411-21apt-get23:50:012
304991052,44cyclictest23684-21apt-get21:34:551
309999630,11cyclictest0-21swapper/223:40:182
30499967,73cyclictest10448-21ssh23:50:011
304999636,54cyclictest0-21swapper/123:09:421
304999629,9cyclictest0-21swapper/123:00:111
309999543,47cyclictest32761-21cyclictest23:44:572
309999541,11cyclictest524-21in:imuxsock23:59:402
309999433,12cyclictest0-21swapper/222:05:182
304999475,13cyclictest2113-21munin-node21:24:431
304999475,13cyclictest2113-21munin-node21:24:431
309999270,15cyclictest3478-21latency_hist21:54:432
30999923,43cyclictest22724-21/usr/sbin/munin00:10:072
30999923,43cyclictest22724-21/usr/sbin/munin00:10:072
32099914,73cyclictest10507-21taskset23:50:033
309999134,9cyclictest0-21swapper/222:45:182
309999134,8cyclictest0-21swapper/223:35:152
30499912,43cyclictest23490-21dpkg21:34:441
309999074,10cyclictest14506-21modprobe23:04:402
30999903,35cyclictest24713-21grep20:20:162
30999903,35cyclictest24713-21grep20:20:162
30999903,32cyclictest25422-21cpu20:24:572
309999029,8cyclictest0-21swapper/221:45:172
309999029,8cyclictest0-21swapper/221:45:172
30999902,31cyclictest2541-21/usr/sbin/munin19:15:152
30999902,31cyclictest20556-21timerandwakeup00:05:142
30999902,30cyclictest24110-21fschecks_time21:35:262
304999040,42cyclictest0-21swapper/122:20:021
304999033,7cyclictest0-21swapper/120:14:411
304999031,9cyclictest0-21swapper/100:24:571
309998937,8cyclictest0-21swapper/223:34:402
30999893,40cyclictest18956-21apt-get20:04:542
309998933,9cyclictest0-21swapper/200:35:072
309998933,9cyclictest0-21swapper/200:35:072
30999892,33cyclictest26487-21unixbench_singl22:30:182
304998970,12cyclictest3787-21/usr/sbin/munin21:55:541
304998968,15cyclictest343-21runrttasks21:10:181
304998940,42cyclictest0-21swapper/119:24:441
304998924,23cyclictest6500-21ls22:50:201
309998873,8cyclictest0-21swapper/222:35:032
30999883,28cyclictest31958-21/usr/sbin/munin00:25:012
30999883,27cyclictest10869-21/usr/sbin/munin19:39:492
309998832,17cyclictest0-21swapper/220:10:582
304998824,11cyclictest0-21swapper/122:00:101
309998735,7cyclictest0-21swapper/223:10:042
30999873,32cyclictest5468-21latency_hist00:34:422
30999873,28cyclictest5708-21apt-key19:24:432
309998732,8cyclictest0-21swapper/222:10:172
309998724,12cyclictest0-21swapper/220:19:072
309998724,12cyclictest0-21swapper/220:19:072
304998737,42cyclictest0-21swapper/122:05:071
304998735,45cyclictest0-21swapper/120:05:171
304998735,44cyclictest0-21swapper/120:59:431
304998735,44cyclictest0-21swapper/120:59:431
30499873,52cyclictest31833-21apt-get22:40:001
304998733,46cyclictest0-21swapper/123:30:121
304998725,8cyclictest0-21swapper/122:15:041
30499872,38cyclictest7649-21latency_hist21:09:441
30499872,31cyclictest18461-21cat21:26:121
30499872,31cyclictest18461-21cat21:26:121
30499872,30cyclictest9459-21fschecks_count19:35:031
309998631,15cyclictest30462-21fschecks_count20:40:022
304998637,42cyclictest0-21swapper/121:15:021
304998637,42cyclictest0-21swapper/119:55:031
304998637,42cyclictest0-21swapper/119:55:031
30499863,26cyclictest25252-21latency_hist22:29:431
30499863,26cyclictest25252-21latency_hist22:29:431
30499862,38cyclictest11833-21head19:40:151
30499862,35cyclictest28737-21fschecks_count22:35:021
30499862,31cyclictest9835-21latency_hist23:49:441
304998613,32cyclictest18142-21timerandwakeup20:00:151
309998554,15cyclictest4279-21apt-key20:59:442
309998554,15cyclictest4279-21apt-key20:59:442
30999853,31cyclictest8432-21sh22:01:212
309998533,11cyclictest0-21swapper/220:34:582
309998531,12cyclictest16480-21fschecks_time22:15:022
309998530,12cyclictest26730-21timerwakeupswit00:15:162
309998521,11cyclictest0-21swapper/200:00:032
304998564,15cyclictest14757-21mailstats19:50:151
304998535,42cyclictest0-21swapper/123:55:151
30499853,31cyclictest18215-21fschecks_time23:10:061
30499853,25cyclictest4314-21cut23:40:031
30499852,29cyclictest748-21fschecks_count21:50:011
30499852,29cyclictest6284-21tune2fs19:25:191
30499852,28cyclictest2707-21fschecks_count22:45:031
309998434,8cyclictest0-21swapper/219:34:592
30999843,33cyclictest23957-21latency_hist23:19:432
309998431,9cyclictest0-21swapper/221:19:312
30999842,34cyclictest31812-21/usr/sbin/munin22:41:172
30999842,27cyclictest28007-21vmstat20:30:182
30499845,31cyclictest3979-21apt-get20:59:541
304998441,37cyclictest1830-21timerandwakeup20:50:141
304998441,37cyclictest1830-21timerandwakeup20:50:141
304998440,37cyclictest7483-21diskmemload00:06:411
304998437,40cyclictest7483-21diskmemload22:11:181
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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