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2026-07-18 - 10:26
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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 Sat Jul 18, 2026 00:44:34)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
27304216514,104sleep026940-21/usr/sbin/munin18:53:180
27304216514,104sleep026940-21/usr/sbin/munin18:53:180
2783321550,20sleep10-21swapper/118:53:341
2783321550,20sleep10-21swapper/118:53:341
284449912134,23cyclictest0-21swapper/000:21:520
284549911995,17cyclictest22869-21fschecks_time23:17:092
284549911995,17cyclictest22869-21fschecks_time23:17:092
28444991193,52cyclictest22582-21ntp_kernel_pll_22:22:150
28444991164,34cyclictest30411-21chrt23:29:240
28444991164,34cyclictest30411-21chrt23:29:240
28444991123,36cyclictest2249-21/usr/sbin/munin23:37:160
28444991123,36cyclictest2249-21/usr/sbin/munin23:37:160
28444991122,53cyclictest28004-21runrttasks21:37:170
284489911043,50cyclictest28432-21cyclictest21:44:581
28444991102,44cyclictest21048-21latency_hist21:26:510
28444991102,44cyclictest21048-21latency_hist21:26:510
284449910950,13cyclictest28432-21cyclictest22:16:250
284449910950,13cyclictest28432-21cyclictest22:16:250
28444991094,30cyclictest13288-21latency_hist23:01:500
28444991092,30cyclictest13576-21/usr/sbin/munin23:02:240
28444991083,37cyclictest7263-21latency_hist22:51:510
28444991083,37cyclictest7263-21latency_hist22:51:510
28444991073,49cyclictest12353-21grep23:53:230
28444991073,29cyclictest4938-21timerandwakeup21:52:220
28444991073,28cyclictest5730-21ssh23:42:140
284449910523,33cyclictest31850-21ssh23:32:020
28444991044,36cyclictest16632-21ssh00:00:480
28444991044,33cyclictest352-21runrttasks19:02:120
28444991043,37cyclictest352-21runrttasks19:01:510
28444991043,37cyclictest352-21runrttasks19:01:510
28444991043,33cyclictest352-21runrttasks21:08:580
28444991014,45cyclictest21452-21fschecks_count21:27:090
28454999769,19cyclictest5108-21latency_hist23:41:512
28454999769,19cyclictest5108-21latency_hist23:41:512
28454999370,13cyclictest0-21swapper/223:51:492
28454999327,29cyclictest30642-21ssh21:42:082
28448999227,26cyclictest3405-21seq19:17:131
2802229228,44sleep30-21swapper/318:53:383
2802229228,44sleep30-21swapper/318:53:383
28454999166,14cyclictest0-21swapper/222:57:182
28454999073,11cyclictest22112-21ssh22:22:032
2844499908,25cyclictest0-21swapper/020:57:360
2844499908,25cyclictest0-21swapper/020:57:360
28454998926,23cyclictest18265-21seq23:08:572
28454998926,23cyclictest18265-21seq23:08:572
28448998920,31cyclictest18934-21munin-run20:06:481
28448998920,31cyclictest18934-21munin-run20:06:481
28444998964,10cyclictest181rcu_preempt22:09:230
28454998825,26cyclictest12214-21seq19:43:502
28448998870,11cyclictest8080-21latency_hist23:46:511
28448998763,12cyclictest0-21swapper/119:56:571
28444998768,12cyclictest2374-21systemd-journal21:04:290
28448998627,26cyclictest29039-21seq20:37:081
28454998543,30cyclictest31808-21kworker/u19:0+nfsiod22:11:342
28454998524,23cyclictest4599-21latency_hist19:21:522
28444998551,26cyclictest0-21swapper/023:22:110
28454998455,18cyclictest0-21swapper/221:12:262
28448998463,12cyclictest0-21swapper/120:12:101
28448998463,12cyclictest0-21swapper/120:12:101
28448998426,18cyclictest12962-21seq23:53:451
28448998425,22cyclictest10497-21seq21:07:551
28448998423,22cyclictest2324-21seq20:53:041
28454998349,9cyclictest181rcu_preempt22:37:052
28454998325,28cyclictest3937-21seq22:45:582
28454998321,23cyclictest352-21runrttasks20:59:192
28454998321,23cyclictest352-21runrttasks20:59:192
2844899837,53cyclictest8182-21ssh23:46:561
28448998342,26cyclictest15215-21apt-get21:17:041
2844899833,33cyclictest7050-21find21:02:241
28448998326,26cyclictest18568-21seq00:02:541
28448998323,23cyclictest13928-21seq19:49:451
28454998254,18cyclictest0-21swapper/222:32:132
28454998216,24cyclictest0-21swapper/222:14:442
28454998216,24cyclictest0-21swapper/222:14:442
28448998243,32cyclictest23442-21kworker/u18:1+nfsiod21:30:401
28454998163,9cyclictest0-21swapper/221:17:212
28454998159,12cyclictest0-21swapper/219:47:212
28454998119,28cyclictest0-21swapper/221:23:392
28454998119,28cyclictest0-21swapper/221:23:392
28448998160,12cyclictest0-21swapper/100:07:251
2844899814,56cyclictest3194-21apt-get20:57:031
2844899814,56cyclictest3194-21apt-get20:57:031
28448998126,24cyclictest26978-21seq22:29:481
28448998123,23cyclictest31814-21seq19:04:291
28444998160,13cyclictest2638-21diskmemload00:14:200
28444998160,13cyclictest2638-21diskmemload00:14:200
28454998031,20cyclictest297-21systemd-logind22:31:492
28454998026,25cyclictest2287-21seq21:47:512
28454998024,23cyclictest9152-21seq22:53:442
28448998064,8cyclictest0-21swapper/122:16:511
28448998064,8cyclictest0-21swapper/122:16:511
28448998029,13cyclictest181rcu_preempt23:37:221
28448998029,13cyclictest181rcu_preempt23:37:221
28448998026,18cyclictest1307-21seq23:35:001
28448998025,19cyclictest25548-21seq00:15:511
28448998025,19cyclictest25548-21seq00:15:511
28448998022,23cyclictest9177-21seq22:53:481
28444998055,18cyclictest20965-21sh00:07:210
97032790,10sleep10-21swapper/122:01:471
28454997957,12cyclictest0-21swapper/220:21:502
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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