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2026-08-17 - 18:48
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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 Mon Aug 17, 2026 12:44:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
27061212912,79sleep027030-21apt-get07:05:210
28355210613,63sleep128380-21munin-plugin-st07:09:511
284989910547,15cyclictest28485-21cyclictest07:45:131
27909210011,55sleep227996-21unixbench_multi07:06:092
28498999957,11cyclictest28485-21cyclictest08:04:521
28498999957,11cyclictest28485-21cyclictest08:04:521
70872920,7sleep30-21swapper/307:40:263
70872920,7sleep30-21swapper/307:40:263
28501999158,10cyclictest0-21swapper/209:09:582
28498999064,19cyclictest28765-21timerwakeupswit09:50:251
2849899862,61cyclictest16274-21ssh11:14:571
2849499865,51cyclictest15-21ksoftirqd/007:25:090
28494998649,24cyclictest26812-21kworker/u17:1+flush-179:009:10:060
2850199842,58cyclictest24767-21apt-get12:20:062
28501998368,9cyclictest6394-21systemctl10:59:492
28501998344,8cyclictest181rcu_preempt11:20:232
28494998347,10cyclictest59-21kcompactd011:28:130
28501998254,8cyclictest181rcu_preempt08:10:072
28498998261,15cyclictest21136-21fschecks_time08:25:131
28498998261,15cyclictest21136-21fschecks_time08:25:131
28494998267,9cyclictest28536-21kworker/u17:311:34:500
28494998267,9cyclictest28536-21kworker/u17:311:34:500
2849499826,35cyclictest15-21ksoftirqd/007:30:080
2849499823,45cyclictest15-21ksoftirqd/009:27:010
28494998231,20cyclictest181rcu_preempt12:35:200
28494998220,32cyclictest15-21ksoftirqd/010:45:130
28501998166,10cyclictest28485-21cyclictest10:40:262
28501998163,14cyclictest28485-21cyclictest12:35:132
2849899813,59cyclictest24807-21sh12:20:051
28494998113,38cyclictest15-21ksoftirqd/009:42:480
28494998113,38cyclictest15-21ksoftirqd/009:42:480
28501997960,13cyclictest23244-21latency_hist10:34:522
28498997962,11cyclictest296-21systemd-logind10:34:511
28501997836,10cyclictest181rcu_preempt10:45:552
28494997848,23cyclictest161ktimers/009:35:140
28494997811,42cyclictest15-21ksoftirqd/008:40:080
28501997762,9cyclictest3243-21ntp_kernel_err11:45:202
28501997760,10cyclictest11542-21ssh11:59:272
28501997760,10cyclictest11542-21ssh11:59:272
28501997756,11cyclictest0-21swapper/212:04:522
28501997728,9cyclictest371rcuc/209:05:042
28498997762,9cyclictest11868-21modprobe09:24:501
2849899772,36cyclictest204-21systemd-journal09:38:001
2849499773,46cyclictest15-21ksoftirqd/010:23:340
2849499773,46cyclictest15-21ksoftirqd/010:23:340
28494997732,21cyclictest15-21ksoftirqd/008:49:540
28494997732,19cyclictest181rcu_preempt11:50:150
28501997658,13cyclictest11334-21sh09:23:272
28501997658,12cyclictest1306-21latency_hist09:04:532
28501997654,15cyclictest3051-21latency_hist07:29:542
28501997648,8cyclictest181rcu_preempt08:45:272
28501997646,13cyclictest181rcu_preempt10:06:072
28501997640,8cyclictest181rcu_preempt12:08:532
28498997656,10cyclictest0-21swapper/110:20:131
28498997656,10cyclictest0-21swapper/110:20:131
2849899762,38cyclictest61361ssh09:15:101
2849499762,32cyclictest15-21ksoftirqd/011:05:230
2725527616,33sleep30-21swapper/307:05:493
28501997559,10cyclictest353-21runrttasks11:18:522
28501997555,14cyclictest4580-21latency_hist07:34:532
28501997554,9cyclictest181rcu_preempt09:53:572
28501997544,8cyclictest181rcu_preempt09:19:142
28498997533,33cyclictest19130-21switchtime12:10:251
28494997557,12cyclictest204-21systemd-journal08:00:280
28494997557,12cyclictest204-21systemd-journal08:00:280
28494997544,10cyclictest59-21kcompactd007:39:000
28494997524,22cyclictest15-21ksoftirqd/011:58:450
28494997524,22cyclictest15-21ksoftirqd/011:58:450
2849499752,39cyclictest15-21ksoftirqd/012:10:210
28501997455,13cyclictest21067-21latency_hist12:14:522
28501997452,13cyclictest371rcuc/208:40:062
28501997451,17cyclictest21688-21cpu09:40:102
28501997451,17cyclictest21688-21cpu09:40:102
28501997447,7cyclictest181rcu_preempt09:35:012
28501997444,20cyclictest30715-21/usr/sbin/munin07:15:202
28501997430,9cyclictest181rcu_preempt08:29:492
28501997430,9cyclictest181rcu_preempt08:29:492
28501997422,24cyclictest0-21swapper/208:00:022
28501997422,24cyclictest0-21swapper/208:00:022
2849899742,39cyclictest13584-21ntp_offset11:10:201
2849899742,39cyclictest13584-21ntp_offset11:10:201
2849499742,29cyclictest15-21ksoftirqd/012:21:380
28501997358,8cyclictest0-21swapper/212:19:532
28501997352,8cyclictest181rcu_preempt10:03:482
28501997352,8cyclictest181rcu_preempt10:03:482
28501997317,36cyclictest22613-21sort11:25:012
28498997356,11cyclictest5186-21ssh10:56:451
2849899733,42cyclictest3303-21apt-get09:10:051
28494997359,10cyclictest28485-21cyclictest11:02:450
28494997358,10cyclictest28485-21cyclictest10:56:150
2849499734,37cyclictest15-21ksoftirqd/009:50:110
28494997335,10cyclictest59-21kcompactd010:10:540
2849499733,38cyclictest15-21ksoftirqd/009:46:080
28501997257,9cyclictest0-21swapper/210:20:232
28501997257,9cyclictest0-21swapper/210:20:232
28501997249,15cyclictest204-21systemd-journal12:26:572
28498997254,13cyclictest2229-21threads12:35:251
28498997228,8cyclictest181rcu_preempt07:55:251
2849899722,38cyclictest15777-21kernelversion09:30:161
28494997256,9cyclictest0-21swapper/011:10:250
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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