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2026-05-19 - 23:31
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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 50 highest latencies:
System rackbslot7.osadl.org (updated Tue May 19, 2026 12:44:27)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
27528215812,121sleep127567-21/usr/sbin/munin06:56:201
28716991336,97cyclictest3625-21apt-get09:01:130
28716991336,97cyclictest3625-21apt-get09:01:130
28716991329,105cyclictest23353-21apt-get11:21:120
28716991163,24cyclictest5926-21open_inodes10:51:250
28716991162,23cyclictest24648-21seq09:35:000
28716991143,28cyclictest6508-21sh09:58:230
287169911427,56cyclictest0-21swapper/009:36:270
28716991093,26cyclictest10424-21sh11:53:030
28716991093,26cyclictest10424-21sh11:53:030
28716991093,23cyclictest17759-21ssh09:22:230
28716991093,21cyclictest26109-21ssh12:20:170
28716991092,30cyclictest4933-21latency_hist10:50:550
28716991082,29cyclictest18319-21ssh11:11:320
28716991052,23cyclictest27232-21sed12:21:210
28716991043,24cyclictest28717-21cat07:00:550
28716991042,22cyclictest24161-21rm10:27:500
28716991042,22cyclictest24161-21rm10:27:500
28716991032,24cyclictest23133-21ssh12:15:230
28716991032,24cyclictest23133-21ssh12:15:230
28730991022,42cyclictest14334-21taskset10:11:232
287169910246,50cyclictest1791-21ssh09:51:070
28716991023,25cyclictest32109-21timerandwakeup09:46:280
28716991023,25cyclictest32109-21timerandwakeup09:46:280
28716991023,22cyclictest3491-21seq08:59:210
28716991023,22cyclictest3491-21seq08:59:210
28716991022,35cyclictest28270-21runrttasks09:41:060
28716991013,25cyclictest30979-21ssh11:33:010
28716991013,25cyclictest12553-21ssh11:02:080
28716991013,23cyclictest27390-21diskmemload10:32:510
28716991012,23cyclictest31424-21ssh12:28:290
28716991003,25cyclictest9273-21ssh10:02:490
28716991003,25cyclictest9273-21ssh10:02:490
28716991003,24cyclictest22020-21ssh10:25:120
28716991003,23cyclictest12555-21wc11:56:250
28721999947,8cyclictest0-21swapper/107:31:501
28721999931,24cyclictest1-21systemd12:30:511
2871699993,21cyclictest6900-21/usr/sbin/munin11:46:330
2871699992,73cyclictest17241-21ntp_offset10:16:200
2871699992,27cyclictest12127-21fschecks_time07:46:140
2871699992,25cyclictest2374-21systemd-journal09:17:150
2871699992,24cyclictest21995-21taskset11:18:330
2871699992,24cyclictest21995-21taskset11:18:330
2871699992,22cyclictest17085-21latency_hist11:10:550
28730999846,8cyclictest0-21swapper/210:21:262
2871699983,22cyclictest12689-21ssh09:15:320
2871699982,23cyclictest184982/usr/sbin/munin08:06:130
2871699973,21cyclictest16452-21cron08:00:510
2871699972,22cyclictest26456-21cstates11:26:080
28730999654,32cyclictest6646-21kworker/u19:0+nfsiod12:03:152
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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