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2026-05-08 - 10:54
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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 50 highest latencies:
System rackbslot7.osadl.org (updated Fri May 08, 2026 00:44:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
224721498,24sleep20-21swapper/218:57:142
33479912843,58cyclictest0-21swapper/200:26:532
32949912151,17cyclictest10363-21latency_hist19:21:390
3322991192,97cyclictest2937-21apt-get21:41:591
3322991192,97cyclictest2937-21apt-get21:41:591
3360991182,44cyclictest25501-21chrt23:11:513
3322991184,92cyclictest27133-21apt-get22:21:511
32949911650,14cyclictest27900-21kworker/u17:1+xprtiod21:35:320
32949911650,14cyclictest27900-21kworker/u17:1+xprtiod21:35:320
32949911650,14cyclictest27900-21kworker/u17:1+xprtiod21:35:320
3294991163,52cyclictest30106-21/usr/sbin/munin20:22:020
32949911348,20cyclictest22185-21ssh21:19:480
3294991133,35cyclictest15002-21switchtime23:47:140
293721107,84sleep00-21swapper/019:00:220
32949910946,16cyclictest15792-21ssh21:08:460
33479910883,15cyclictest3279-21cyclictest23:11:412
32949910847,14cyclictest4005-21ssh23:29:480
33479910347,40cyclictest3279-21cyclictest23:50:592
3322991013,73cyclictest17428-21apt-get23:51:561
297121006,16sleep10-21swapper/119:00:471
3347999958,34cyclictest29854-21sh20:21:372
329499987,40cyclictest2937-21apt-get21:41:520
329499987,40cyclictest2937-21apt-get21:41:520
334799953,68cyclictest3063-21apt-get19:01:552
332299952,55cyclictest1143-21apt-get20:31:561
3294999452,9cyclictest17666-21ssh22:58:110
3347999349,38cyclictest0-21swapper/223:46:402
3322999371,14cyclictest20115-21latency_hist19:51:391
332299932,80cyclictest25542-21ssh23:11:591
329499935,30cyclictest25478-21apt-get23:11:590
336099929,68cyclictest20457-21chrt19:52:033
3347999267,19cyclictest10636-21kernelversion22:47:022
3322999236,48cyclictest9189-21apt-get21:52:041
3294999277,8cyclictest0-21swapper/023:51:540
3294999274,13cyclictest15350irq/295-2188000.ethernet23:41:540
3294999251,35cyclictest19988-21latency_hist21:16:400
3294999251,35cyclictest19988-21latency_hist21:16:400
3347999163,20cyclictest19960-21gpgv19:51:412
3347999154,33cyclictest3279-21cyclictest23:27:152
329499908,71cyclictest9189-21apt-get21:51:550
3347998923,54cyclictest25478-21apt-get23:11:512
332299892,55cyclictest10695-21apt-get23:41:521
334799887,64cyclictest24515-21ssh22:16:592
3347998867,14cyclictest24511-21unixbench_multi00:02:142
3347998848,34cyclictest5659-21cpu19:06:572
3347998848,34cyclictest5659-21cpu19:06:572
3347998761,18cyclictest20696-21fschecks_count19:52:542
3347998743,36cyclictest0-21swapper/222:01:372
332299873,60cyclictest20434-21apt-get19:52:041
3322998727,33cyclictest10821-21diskmemload21:37:591
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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