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2026-04-24 - 14:27
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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 24, 2026 00:44:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
234759911847,44cyclictest18436-21ntp_kernel_err20:23:000
22471211411,71sleep022512-21awk18:58:070
23475991133,92cyclictest18802-21/usr/sbin/munin22:29:280
23475991133,79cyclictest21512-21latency_hist23:27:370
23475991123,59cyclictest0-21swapper/023:40:210
23475991113,66cyclictest0-21swapper/023:22:330
23475991103,68cyclictest19716-21df_inode00:17:530
234909910848,49cyclictest0-21swapper/122:58:101
234759910814,55cyclictest29323-21kernelversion21:53:140
234759910814,55cyclictest29323-21kernelversion21:53:140
234909910642,10cyclictest0-21swapper/100:12:581
23475991063,66cyclictest7317-21find23:03:090
23475991063,66cyclictest7317-21find23:03:090
234759910517,52cyclictest0-21swapper/023:08:080
234759910510,57cyclictest0-21swapper/021:27:560
234759910510,57cyclictest0-21swapper/021:27:560
23475991043,87cyclictest0-21swapper/021:07:450
2256121049,67sleep122567-21/usr/sbin/munin18:58:121
23475991034,57cyclictest0-21swapper/021:38:120
23475991023,70cyclictest30729-21ssh23:42:460
23475991023,64cyclictest0-21swapper/021:47:350
23475991023,64cyclictest0-21swapper/021:47:350
23475991022,69cyclictest27601-21ssh00:30:590
23475991022,65cyclictest7639-21ssh22:11:280
23475991022,65cyclictest7639-21ssh22:11:280
23495991019,82cyclictest21725-21ssh23:27:492
234909910135,13cyclictest0-21swapper/121:38:011
234759910148,47cyclictest3981-40find23:52:340
23475991013,71cyclictest25532-21switchtime23:33:070
23475991013,71cyclictest25532-21switchtime23:33:070
234759910128,65cyclictest0-21swapper/022:22:360
23475991003,65cyclictest17892-21latency_hist20:22:370
23475991002,64cyclictest3941-21rm22:04:320
23475991002,62cyclictest6172-21unin-run23:02:340
23490999940,13cyclictest0-21swapper/123:33:091
23490999940,13cyclictest0-21swapper/123:33:091
23490999937,12cyclictest0-21swapper/120:12:561
2347599995,78cyclictest0-21swapper/020:27:460
23475999939,54cyclictest365-21ntpd21:23:040
23475999938,52cyclictest30613-21diskmemload22:38:030
23475999938,52cyclictest30613-21diskmemload22:38:030
2347599992,63cyclictest2960-21runrttasks22:57:060
2347599992,62cyclictest1000-21runrttasks21:07:080
2347599992,62cyclictest1000-21runrttasks21:07:080
23490999844,8cyclictest0-21swapper/123:27:441
23490999837,10cyclictest0-21swapper/119:57:361
2349099983,37cyclictest23448-21timerwakeupswit00:23:101
2349099983,37cyclictest23448-21timerwakeupswit00:23:101
23490999832,12cyclictest0-21swapper/122:43:031
2347599984,62cyclictest0-21swapper/020:37:270
2347599983,63cyclictest32362-21ntpq21:58:000
2347599983,60cyclictest22102-21ssh23:28:290
23475999828,54cyclictest18140-21kworker/u17:3+xprtiod00:05:020
23490999735,11cyclictest0-21swapper/120:27:581
2347599974,83cyclictest29906-21ssh22:47:500
2347599974,78cyclictest13100-21apt-get20:07:450
23475999729,47cyclictest0-21swapper/019:23:060
2347599972,63cyclictest1-21systemd00:17:340
23490999642,9cyclictest0-21swapper/122:37:561
23490999642,9cyclictest0-21swapper/122:37:561
2347599965,52cyclictest0-21swapper/000:10:030
2347599965,52cyclictest0-21swapper/000:10:030
23475999641,47cyclictest0-21swapper/022:13:070
2347599962,55cyclictest0-21swapper/023:58:590
23475999613,53cyclictest10086-21diskmemload21:22:170
2349099954,35cyclictest19440-21latency_hist21:37:371
23490999536,9cyclictest0-21swapper/121:57:361
23490999536,9cyclictest0-21swapper/121:57:361
2347599958,52cyclictest0-21swapper/021:12:460
2347599956,58cyclictest0-21swapper/022:25:290
2347599956,58cyclictest0-21swapper/022:25:290
23475999538,48cyclictest0-21swapper/021:52:330
2347599953,51cyclictest0-21swapper/000:25:570
2347599953,51cyclictest0-21swapper/000:25:570
2347599952,60cyclictest30072-21seq19:19:520
2347599952,60cyclictest23931-21uniq19:02:550
2347599952,60cyclictest23931-21uniq19:02:550
2347599952,58cyclictest23892-21seq20:39:260
23490999436,11cyclictest0-21swapper/121:12:431
2347599943,58cyclictest9418-21seq19:55:030
2347599942,59cyclictest28757-21seq20:54:370
2347599942,59cyclictest28757-21seq20:54:370
23495999368,10cyclictest181rcu_preempt22:37:372
2349099934,33cyclictest352-21runrttasks20:07:591
23490999326,9cyclictest0-21swapper/119:27:351
2347599936,54cyclictest0-21swapper/020:02:460
2347599936,54cyclictest0-21swapper/020:02:460
2347599933,83cyclictest21715-21switchtime22:33:080
2347599932,55cyclictest11120-21seq20:01:190
2349099924,38cyclictest352-21runrttasks22:30:541
2349099924,37cyclictest6023-21ssh23:54:571
2349099924,36cyclictest17763-21latency_hist20:22:361
23490999243,41cyclictest0-21swapper/100:32:351
2349099923,42cyclictest13588-21cpuspeed00:07:481
2349099923,42cyclictest13588-21cpuspeed00:07:481
2349099923,36cyclictest30915-21/usr/sbin/munin21:03:031
2349099923,36cyclictest30915-21/usr/sbin/munin21:03:031
2349099923,34cyclictest27509-21latency_hist20:52:361
2349099923,34cyclictest27509-21latency_hist20:52:361
23490999225,17cyclictest0-21swapper/122:48:021
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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