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2026-08-20 - 08:26
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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 Thu Aug 20, 2026 00:44:25)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
16420212014,70sleep016130-21/usr/sbin/munin19:05:280
17608991193,96cyclictest11049-21/usr/sbin/munin22:31:100
176089911525,77cyclictest17791-21apt-get20:50:100
2657721140,4sleep026578-21ps00:35:290
16451211010,71sleep116497-21/usr/sbin/munin19:05:291
176179910182,13cyclictest25638-21latency_hist00:34:582
176089910015,59cyclictest22149-21apt-get00:30:120
17617999857,34cyclictest0-21swapper/222:14:582
17617999849,41cyclictest0-21swapper/221:14:592
17612999780,11cyclictest24504-21diskmemload21:55:001
17612999749,41cyclictest351-21runrttasks00:14:581
17612999749,41cyclictest351-21runrttasks00:14:581
17612999745,43cyclictest0-21swapper/100:25:241
17617999653,37cyclictest21260-21cut20:59:592
1761799962,38cyclictest5340-21cut20:10:192
17612999644,44cyclictest0-21swapper/122:05:231
17617999541,48cyclictest0-21swapper/223:40:142
17617999456,31cyclictest0-21swapper/222:05:262
1761799944,33cyclictest21459-21/usr/sbin/munin19:20:292
17612999471,15cyclictest29849-21kworker/u17:1-xprtiod22:15:181
1761299943,30cyclictest4105-21apt-get23:10:081
17617999348,37cyclictest0-21swapper/219:55:172
1761799933,39cyclictest19482-21/usr/sbin/munin00:25:142
1761799933,38cyclictest25903-21grep00:35:122
17612999339,45cyclictest0-21swapper/123:20:241
17617999247,39cyclictest351-21runrttasks21:38:102
17617999247,39cyclictest351-21runrttasks21:38:102
1761799923,35cyclictest26672-21fschecks_time23:45:192
1761799922,38cyclictest30292-21runrttasks19:45:312
17612999245,42cyclictest0-21swapper/122:00:141
17608999267,17cyclictest27662-21cron21:14:570
17608999257,24cyclictest28306-21timerandwakeup22:05:330
1761799914,33cyclictest24422-21latency_hist19:29:572
1761799913,36cyclictest7919-21fschecks_count22:25:172
1761799913,35cyclictest8471-21ls20:20:142
1761799913,34cyclictest14977-21find22:35:322
1761799913,34cyclictest14977-21find22:35:322
17612999176,11cyclictest17601-21cyclictest23:00:341
17612999140,44cyclictest0-21swapper/123:50:241
1761299913,33cyclictest18056-21fschecks_time19:10:191
1761799903,36cyclictest26549-21fschecks_time19:35:192
1761799903,35cyclictest23972-21cstates22:50:142
1761799903,34cyclictest19790-21fschecks_count19:15:092
1761799902,37cyclictest1093-21find23:55:322
1761799902,37cyclictest1093-21find23:55:322
17612999067,15cyclictest202-21systemd-journal22:49:471
1761299903,24cyclictest16130-21sh23:29:041
17617998942,39cyclictest0-21swapper/200:24:582
17617998937,45cyclictest0-21swapper/223:00:132
1761799893,35cyclictest27058-21latency_hist22:04:592
1761799893,33cyclictest20511-21latency_hist22:44:592
1761799893,33cyclictest1734-21ssh23:05:302
17617998920,29cyclictest4506-21sh23:10:202
17612998968,10cyclictest0-21swapper/121:20:201
17612998961,20cyclictest18057-21apt-key20:50:001
1761299894,37cyclictest27101-21mailstats23:45:301
1761299893,31cyclictest13183-21/usr/sbin/munin20:35:301
1761299893,31cyclictest13183-21/usr/sbin/munin20:35:301
1761299892,38cyclictest19088-21switchtime20:51:171
17608998959,20cyclictest1-21systemd20:48:480
17608998917,29cyclictest5113-21ssh21:30:090
17617998869,10cyclictest0-21swapper/221:30:152
1761799884,35cyclictest14139-21grep20:35:322
1761799884,35cyclictest14139-21grep20:35:322
1761799884,34cyclictest24939-21fschecks_time19:30:172
1761799884,34cyclictest14864-21fschecks_count21:45:162
1761799883,35cyclictest13420-21rm23:24:592
1761799883,33cyclictest29483-21/usr/sbin/munin23:50:332
1761799883,33cyclictest12068-21awk21:40:252
1761799882,36cyclictest11664-21fschecks_time22:31:052
17612998870,12cyclictest23871-21/usr/sbin/munin21:59:581
17612998836,44cyclictest0-21swapper/119:40:171
1761299883,38cyclictest15216-21ntp_kernel_pll_21:45:221
1761299883,32cyclictest17787-21fschecks_time22:40:161
1761299883,23cyclictest11398-21latency_hist21:40:011
17612998831,48cyclictest0-21swapper/120:34:481
1761299882,37cyclictest4950-21latency_hist21:30:001
1761299882,35cyclictest17142-21ls23:30:171
1761299882,35cyclictest17142-21ls23:30:171
17608998845,13cyclictest0-21swapper/022:54:590
1761799874,35cyclictest29921-21modprobe22:59:572
1761799874,35cyclictest29921-21modprobe22:59:572
1761799874,31cyclictest5037-21grep20:10:002
1761799874,30cyclictest14818-21/usr/sbin/munin20:40:072
1761799874,30cyclictest14818-21/usr/sbin/munin20:40:072
17617998737,44cyclictest0-21swapper/221:50:312
1761799873,38cyclictest11577-21/usr/sbin/munin20:30:232
1761799873,37cyclictest1896-21ntpq22:15:252
1761799873,35cyclictest1915-21/usr/sbin/munin21:25:252
1761799873,34cyclictest21685-21grep21:55:302
1761799873,33cyclictest31235-21sh21:20:122
1761799873,32cyclictest6731-21/usr/sbin/munin20:15:192
1761799873,32cyclictest6731-21/usr/sbin/munin20:15:192
1761799873,32cyclictest16702-21grep23:30:002
17617998730,50cyclictest17789-21latency_hist20:49:592
17617998717,30cyclictest22915-21latency_hist23:39:582
17612998773,10cyclictest17601-21cyclictest20:05:291
17612998772,8cyclictest0-21swapper/122:30:001
1761299874,35cyclictest23257-21fschecks_count19:25:191
1761299874,33cyclictest917-21/usr/sbin/munin23:05:301
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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