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2026-04-17 - 10:36
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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 Fri Apr 17, 2026 00:44:34)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
94619911654,55cyclictest17351-21/usr/sbin/munin21:03:270
9461991155,51cyclictest25250-21latency_hist23:58:050
9461991126,36cyclictest7059-21latency_hist23:28:050
9461991126,36cyclictest7059-21latency_hist23:28:050
94719911156,15cyclictest1728-21sh23:18:251
9461991093,27cyclictest15331-21apt-get22:48:160
9461991093,22cyclictest14686-21ntpq20:54:260
9461991092,26cyclictest19014-21cstates22:53:180
9461991083,34cyclictest23482-21cpu21:13:190
9461991083,34cyclictest23482-21cpu21:13:190
9461991073,74cyclictest29910-21modprobe20:03:220
94619910630,9cyclictest0-21swapper/021:23:380
94619910630,9cyclictest0-21swapper/021:23:380
9461991062,34cyclictest18296-21fschecks_count19:28:220
9461991062,34cyclictest18296-21fschecks_count19:28:220
94619910540,58cyclictest0-21swapper/020:13:010
94619910535,8cyclictest0-21swapper/022:38:030
9461991053,29cyclictest4554-21runrttasks21:35:090
9461991053,27cyclictest22153-21fschecks_count22:58:230
9461991053,27cyclictest22153-21fschecks_count22:58:230
94619910528,9cyclictest0-21swapper/022:33:010
9461991052,31cyclictest23080-21latency_hist21:13:050
9461991044,40cyclictest12817-21runrttasks00:31:060
9461991043,30cyclictest8483-21rm23:28:400
94619910428,9cyclictest0-21swapper/021:58:240
94619910421,15cyclictest0-21swapper/023:35:140
9461991034,29cyclictest2544-21runrttasks20:18:130
9461991033,37cyclictest31771-21cat00:08:280
9461991033,37cyclictest31771-21cat00:08:280
9461991033,23cyclictest28186-21sh00:03:040
94619910331,10cyclictest0-21swapper/021:38:300
9461991032,36cyclictest15832-21sed21:53:590
9461991032,36cyclictest15832-21sed21:53:590
9461991024,35cyclictest13262-21ntp_offset22:43:320
9461991023,33cyclictest12466-21latency_hist22:43:040
94619910227,16cyclictest0-21swapper/020:43:380
94619910217,28cyclictest19749-21sort19:33:120
94619910217,28cyclictest19749-21sort19:33:120
94619910136,58cyclictest0-21swapper/019:13:370
94619910134,8cyclictest0-21swapper/022:14:560
9461991013,34cyclictest29200-21ssh00:03:380
94619910118,28cyclictest28999-21sort19:59:400
94619910116,24cyclictest9161-21fschecks_count21:43:240
9461991004,30cyclictest11873-21/usr/sbin/munin21:48:380
9461991004,30cyclictest11873-21/usr/sbin/munin21:48:380
9461991003,35cyclictest1692-21fschecks_time23:18:240
9461991003,33cyclictest27552-21latency_hist19:58:050
9461991003,32cyclictest22149-21ssh22:03:390
9461991003,32cyclictest22149-21ssh22:03:390
94619910027,11cyclictest0-21swapper/022:23:360
94619910027,11cyclictest0-21swapper/022:23:360
94619910025,14cyclictest0-21swapper/023:38:170
94619910025,14cyclictest0-21swapper/023:38:170
94619910025,11cyclictest0-21swapper/021:33:040
9461999930,9cyclictest0-21swapper/020:48:220
946199992,36cyclictest31384-21ssh23:13:280
947799984,45cyclictest39-21ksoftirqd/221:34:312
946199984,32cyclictest30734-21ntpq22:18:320
946199983,37cyclictest9589-21latency_hist19:03:070
946199983,36cyclictest25115-21fschecks_count23:03:230
946199983,32cyclictest16427-21switchtime20:58:370
9461999826,11cyclictest0-21swapper/023:48:030
946199982,40cyclictest6610-21timerwakeupswit20:28:380
946199982,36cyclictest21977-21grep19:38:350
9461999813,27cyclictest0-21swapper/020:38:040
946199974,33cyclictest8695-21ssh00:23:370
946199973,33cyclictest24770-21cut19:48:230
946199972,37cyclictest13197-21latency_hist19:13:050
946199972,36cyclictest16366-21latency_hist19:23:040
946199972,31cyclictest26752-21taskset22:12:550
946199972,19cyclictest19632-21fschecks_time23:48:240
946199963,35cyclictest16780-21fschecks_time19:23:240
946199963,27cyclictest4132-21/usr/sbin/munin20:23:300
946199963,27cyclictest1256-21grep20:15:210
946199963,27cyclictest1256-21grep20:15:210
9461999622,20cyclictest30789-21latency_hist23:13:050
946199953,30cyclictest352-21runrttasks00:13:280
946199953,30cyclictest10350-21awk20:43:010
946199952,33cyclictest6109-21ssh00:19:010
946199952,33cyclictest6109-21ssh00:19:010
946199952,32cyclictest29229-21latency_hist21:23:040
946199942,29cyclictest22947-21/usr/sbin/munin19:43:220
946199933,28cyclictest11089-21latency_hist19:08:040
946199933,28cyclictest11089-21latency_hist19:08:040
9477998955,17cyclictest181rcu_preempt21:23:372
9477998955,17cyclictest181rcu_preempt21:23:372
9471998838,9cyclictest17059-21diskmemload22:53:491
9471998768,10cyclictest20850-21ssh22:03:021
9477998660,20cyclictest8802-21latency_hist20:38:042
9477998537,16cyclictest181rcu_preempt21:12:002
947799853,51cyclictest39-21ksoftirqd/222:28:232
9471998556,9cyclictest31-21ksoftirqd/122:36:101
947199854,56cyclictest15208-21ssh21:53:221
947199854,56cyclictest15208-21ssh21:53:221
948599842,38cyclictest26861-21chrt21:18:253
9477998452,15cyclictest181rcu_preempt21:05:132
9477998367,10cyclictest15351-21ls21:53:372
9477998367,10cyclictest15351-21ls21:53:372
9477998351,9cyclictest181rcu_preempt21:38:212
9477998342,17cyclictest181rcu_preempt22:12:042
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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