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2026-06-04 - 15:40
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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 Jun 04, 2026 12:44:28)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2860991193,67cyclictest26886-21chrt11:15:073
2849991114,81cyclictest15031-21apt-get11:50:012
2830991103,84cyclictest32059-21apt-get10:30:050
2830991103,84cyclictest32059-21apt-get10:30:050
28419910831,45cyclictest0-21swapper/109:49:381
28419910831,45cyclictest0-21swapper/109:49:381
2660210611,64sleep12701-21munin-run06:59:461
2860991003,41cyclictest0-21swapper/310:10:063
2860991003,41cyclictest0-21swapper/310:10:063
28419910047,47cyclictest0-21swapper/107:55:081
28419910047,47cyclictest0-21swapper/107:55:081
2830999974,17cyclictest6917-21latency_hist12:29:490
2830999974,17cyclictest6917-21latency_hist12:29:490
218829312,59sleep02282-21unixbench_multi06:55:330
2849999175,10cyclictest2820-21cyclictest11:14:452
2841999148,36cyclictest24552-21/usr/sbin/munin12:05:151
283099905,34cyclictest26019-21entropy10:20:060
2830998861,18cyclictest30810-21fschecks_count12:15:050
2830998814,49cyclictest1-21systemd07:04:500
2849998719,34cyclictest352-21runrttasks10:16:202
2841998746,34cyclictest9709-21diskmemload10:45:041
2830998752,12cyclictest181rcu_preempt10:52:160
283099873,63cyclictest15612-21kworker/u18:0+ext4-rsv-conversion11:50:050
284999863,66cyclictest32059-21apt-get10:30:012
284999863,66cyclictest32059-21apt-get10:30:012
284199864,70cyclictest1106-21ssh12:19:551
2841998646,35cyclictest352-21runrttasks07:45:221
284199863,70cyclictest0-21swapper/107:49:591
284199863,70cyclictest0-21swapper/107:49:591
284199862,49cyclictest0-21swapper/112:14:481
284199862,49cyclictest0-21swapper/112:14:481
284999859,35cyclictest30856-21wc09:34:492
2841998564,15cyclictest23052-21sh10:15:081
284199853,73cyclictest0-21swapper/107:30:031
284199853,71cyclictest0-21swapper/107:09:581
284199844,68cyclictest0-21swapper/108:45:001
284199843,69cyclictest0-21swapper/108:54:581
2830998461,16cyclictest2820-21cyclictest07:05:050
2830998458,17cyclictest8364-21latency_hist10:44:480
2830998458,17cyclictest8364-21latency_hist10:44:480
283099844,52cyclictest26851-21ssh11:15:010
2849998314,26cyclictest9709-21diskmemload11:31:372
2849998314,26cyclictest9709-21diskmemload11:31:372
2841998349,28cyclictest6084-21latency10:40:121
2841998349,28cyclictest6084-21latency10:40:121
284199834,73cyclictest0-21swapper/111:54:571
284199834,69cyclictest0-21swapper/108:49:561
284199832,71cyclictest5453-21cat07:05:141
284199832,6cyclictest0-21swapper/109:35:011
2841998320,42cyclictest0-21swapper/112:00:041
2830998362,15cyclictest25766-21sendmail08:09:460
2830998350,10cyclictest181rcu_preempt09:09:580
2830998337,11cyclictest0-21swapper/009:50:020
284199826,64cyclictest301ktimers/111:29:571
284199826,64cyclictest301ktimers/111:29:571
2841998261,15cyclictest2887-21fschecks_time10:35:081
2841998260,15cyclictest2820-21cyclictest09:01:561
2841998260,15cyclictest2820-21cyclictest09:01:561
2841998256,20cyclictest11566-21timerwakeupswit09:55:221
2841998256,20cyclictest11566-21timerwakeupswit09:55:221
2830998258,16cyclictest2820-21cyclictest11:11:500
2830998251,10cyclictest181rcu_preempt12:09:560
2830998251,10cyclictest181rcu_preempt12:09:560
2830998239,10cyclictest181rcu_preempt11:00:200
189228222,30sleep20-21swapper/206:55:272
284199814,66cyclictest0-21swapper/109:59:581
284199814,59cyclictest14736-21apt-get07:34:581
284199813,68cyclictest0-21swapper/110:19:581
284199813,59cyclictest352-21runrttasks10:10:041
284199813,59cyclictest352-21runrttasks10:10:041
284199812,73cyclictest0-21swapper/109:50:001
2830998158,15cyclictest26845-21sh12:08:380
2830998153,11cyclictest181rcu_preempt07:50:030
2830998153,11cyclictest181rcu_preempt07:50:030
2849998024,28cyclictest17679-21latency_hist07:44:492
2841998038,35cyclictest0-21swapper/111:49:561
284199803,65cyclictest0-21swapper/107:39:581
2830998052,21cyclictest19274-21latency_hist10:09:510
2830998047,12cyclictest181rcu_preempt08:30:080
283099802,42cyclictest4378-21latency_hist09:44:490
284999796,29cyclictest0-21swapper/208:55:182
2849997953,18cyclictest1841-21ssh11:26:282
2849997917,25cyclictest1026-21seq09:39:082
2849997913,28cyclictest352-21runrttasks10:01:572
2841997956,15cyclictest27190-21cpu11:15:571
2841997939,32cyclictest0-21swapper/110:30:151
2841997939,32cyclictest0-21swapper/110:30:151
284199793,70cyclictest0-21swapper/108:30:141
284199793,65cyclictest0-21swapper/108:04:581
284199793,64cyclictest0-21swapper/109:04:561
284199792,32cyclictest10070-21fschecks_count07:20:081
2830997952,9cyclictest181rcu_preempt10:14:560
2830997951,12cyclictest181rcu_preempt12:20:000
2830997947,9cyclictest181rcu_preempt07:35:130
284999786,35cyclictest0-21swapper/209:40:082
2849997857,15cyclictest18821-21fschecks_count11:55:072
2849997810,26cyclictest0-21swapper/210:43:482
2849997810,26cyclictest0-21swapper/210:43:482
2841997859,13cyclictest277-21dbus-daemon10:09:471
284199783,62cyclictest0-21swapper/107:14:581
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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