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2026-06-19 - 21:53
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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 Jun 19, 2026 12:44:34)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
635425050,8sleep00-21swapper/006:58:450
635425050,8sleep00-21swapper/006:58:450
5467212312,73sleep15470-21needreboot06:54:191
5467212312,73sleep15470-21needreboot06:54:191
6480991083,76cyclictest457-21apt-get11:19:032
6480991083,76cyclictest457-21apt-get11:19:032
64789910586,12cyclictest7421-21sshd12:24:591
565129910,57sleep25704-21sensors_temp06:54:282
565129910,57sleep25704-21sensors_temp06:54:282
6480999875,16cyclictest298-21in:imuxsock12:27:262
6480999842,41cyclictest0-21swapper/209:14:082
647899972,49cyclictest10058-21apt-get07:09:001
6474999465,22cyclictest32043-21latency_hist10:23:470
6474999363,24cyclictest15267-21latency_hist07:23:490
6474999363,24cyclictest15267-21latency_hist07:23:490
6480999164,21cyclictest9234-21kernelversion10:39:102
6480999164,21cyclictest9234-21kernelversion10:39:102
6478999067,13cyclictest27326-21kworker/u17:0-rpciod12:03:491
6478999067,13cyclictest27326-21kworker/u17:0-rpciod12:03:491
647899902,64cyclictest23075-21sshd09:14:171
647899888,70cyclictest514-21sh11:19:041
647899888,70cyclictest514-21sh11:19:041
647499874,39cyclictest14575-21latency_hist10:48:470
6480998650,25cyclictest32605-21grep10:24:062
6474998630,46cyclictest20487-21systemctl10:58:460
6480998566,9cyclictest0-21swapper/211:09:122
6478998555,23cyclictest27607-21timerandwakeup11:09:211
6474998544,15cyclictest181rcu_preempt11:57:060
6474998456,22cyclictest24953-21fschecks_time11:59:080
6474998456,22cyclictest24953-21fschecks_time11:59:080
6478998364,13cyclictest31-21ksoftirqd/111:49:011
6478998364,13cyclictest31-21ksoftirqd/111:49:011
6478998362,13cyclictest15500-21ssh11:44:021
6478998349,25cyclictest13658-21latency_hist07:18:481
6474998343,26cyclictest181rcu_preempt09:44:130
647499833,45cyclictest12990-21grep08:54:230
6474998328,26cyclictest16220-21ls11:44:200
6478998261,16cyclictest6465-21cyclictest10:49:431
6478998260,12cyclictest0-21swapper/108:59:181
6478998259,17cyclictest10065-21latency_hist07:08:481
6478998259,17cyclictest10065-21latency_hist07:08:481
647499827,59cyclictest22971-21ssh09:14:000
6474998262,14cyclictest13438-21diskmemload12:25:040
6474998256,17cyclictest13438-21diskmemload12:17:160
6480998148,27cyclictest15093-21sh11:43:442
648099812,60cyclictest13292-21kworker/u17:2+ext4-rsv-conversion07:09:242
6478998158,12cyclictest0-21swapper/108:43:471
6474998153,21cyclictest544-21cron08:38:450
6474998146,10cyclictest181rcu_preempt11:53:480
6474998146,10cyclictest181rcu_preempt11:53:480
647499813,46cyclictest23090-21grep10:08:460
6474998127,36cyclictest181rcu_preempt10:13:590
6474998127,36cyclictest181rcu_preempt10:13:590
6474998052,21cyclictest298-21in:imuxsock07:03:460
6474998052,21cyclictest298-21in:imuxsock07:03:460
6478997960,12cyclictest297-21systemd-logind07:03:461
6478997960,12cyclictest297-21systemd-logind07:03:461
6478997956,17cyclictest21125-21ssh10:59:081
6478997956,14cyclictest2055-21sh08:23:451
6474997959,14cyclictest6650-21rm09:39:430
6474997959,14cyclictest6650-21rm09:39:430
647499795,40cyclictest17060-21grep09:04:090
6474997953,18cyclictest3079-21threads08:24:210
6474997953,18cyclictest3079-21threads08:24:210
6474997945,10cyclictest10446-21latency_hist07:08:490
6474997945,10cyclictest10446-21latency_hist07:08:490
647499793,40cyclictest3080-21fschecks_count10:29:070
6474997927,34cyclictest12981-21timerandwakeup07:14:180
648099786,59cyclictest21794-21ssh11:54:192
6480997859,13cyclictest12472-21unixbench_singl09:49:222
6480997843,27cyclictest0-21swapper/209:58:472
6480997843,27cyclictest0-21swapper/209:58:472
6474997861,11cyclictest22478-21apt-key09:13:470
6474997857,14cyclictest7064-21latency_hist12:23:480
6474997855,15cyclictest3759-21ssh11:24:070
6474997854,18cyclictest352-21runrttasks07:53:220
647499785,37cyclictest23723-21grep10:09:090
6474997812,10cyclictest161ktimers/010:49:170
6478997760,12cyclictest22404-21latency_hist09:13:491
6478997756,15cyclictest352-21runrttasks09:35:171
6478997755,12cyclictest0-21swapper/109:39:071
6478997755,12cyclictest0-21swapper/109:39:071
6478997751,18cyclictest297-21systemd-logind07:58:471
6478997751,18cyclictest297-21systemd-logind07:58:471
6478997724,10cyclictest181rcu_preempt09:33:491
647499773,60cyclictest10582-21apt-get07:09:000
6478997656,9cyclictest0-21swapper/107:48:491
6478997655,13cyclictest19676-21snmpd09:08:261
6478997650,18cyclictest32376-21munin-plugin-st11:18:481
6478997650,18cyclictest32376-21munin-plugin-st11:18:481
6478997647,21cyclictest2525-21fschecks_count08:24:081
6478997647,21cyclictest2525-21fschecks_count08:24:081
6478997615,25cyclictest0-21swapper/110:35:201
647499766,38cyclictest29827-21cstates11:14:010
647499766,38cyclictest29827-21cstates11:14:010
6474997651,20cyclictest6465-21cyclictest10:39:060
6474997651,20cyclictest6465-21cyclictest10:39:060
6480997556,9cyclictest0-21swapper/209:39:082
6480997556,9cyclictest0-21swapper/209:39:082
6480997552,13cyclictest0-21swapper/212:09:132
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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