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2026-08-18 - 20:36
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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 Tue Aug 18, 2026 12:44:27)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1039221176,16sleep00-21swapper/007:07:460
10684991083,93cyclictest21285-21apt-get09:15:100
10684991064,87cyclictest26860-21apt-get10:15:020
10705991053,61cyclictest27609-21sort11:59:572
10705991053,61cyclictest27609-21sort11:59:572
10684991054,91cyclictest10364-21ssh10:40:160
10684991034,89cyclictest30859-21apt-get09:30:010
807921020,6sleep30-21swapper/309:45:033
106849910168,23cyclictest17612-21diskmemload10:55:190
10684999768,21cyclictest9641-21latency_hist08:44:490
10684999746,25cyclictest17749-21ssh11:44:150
1071299962,67cyclictest30905-21chrt09:30:033
10696999677,12cyclictest14534-21/usr/sbin/munin07:20:141
1070599943,45cyclictest353-21runrttasks07:40:512
10696999323,25cyclictest0-21swapper/112:06:181
10696999229,27cyclictest11803-21sh10:41:321
10696999221,25cyclictest1043-21unixbench_singl08:15:231
10696999221,25cyclictest1043-21unixbench_singl08:15:231
10684999261,21cyclictest11117-21sh09:50:000
10684999217,28cyclictest181rcu_preempt09:35:080
10696999130,24cyclictest29453-21seq12:02:161
10696999130,24cyclictest29453-21seq12:02:161
10684999151,17cyclictest181rcu_preempt12:24:340
105802919,52sleep210595-21sh07:09:482
10705999049,35cyclictest204-21systemd-journal08:04:272
10705999044,39cyclictest0-21swapper/210:45:102
10705999040,43cyclictest0-21swapper/212:05:032
10696999069,11cyclictest0-21swapper/107:35:211
10696999033,27cyclictest21349-21sh09:15:101
10696999025,26cyclictest353-21runrttasks11:16:101
10696999022,26cyclictest0-21swapper/111:58:271
10705998949,33cyclictest0-21swapper/210:10:102
1070599893,50cyclictest27984-21seq11:08:112
1070599893,49cyclictest6075-21seq12:16:392
1070599892,49cyclictest17742-21runrttasks10:50:492
10684998949,17cyclictest181rcu_preempt11:10:120
10684998948,20cyclictest181rcu_preempt11:45:050
10684998948,20cyclictest181rcu_preempt11:45:050
10696998864,15cyclictest31907-21ssh11:14:491
10696998823,24cyclictest0-21swapper/111:37:081
10684998863,16cyclictest27271-21sh11:59:450
10684998852,14cyclictest181rcu_preempt10:45:040
1070599872,48cyclictest19815-21seq07:35:082
10696998769,11cyclictest17612-21diskmemload10:00:081
10696998726,22cyclictest9585-21seq12:22:381
10696998720,26cyclictest22931-21fschecks_count11:00:081
10696998717,28cyclictest0-21swapper/110:24:491
10684998740,9cyclictest181rcu_preempt07:20:110
10684998732,11cyclictest181rcu_preempt07:10:020
10705998642,34cyclictest24666-21grep07:50:082
1070599863,47cyclictest3694-21ssh12:13:352
10696998629,27cyclictest6463-21seq10:34:321
10696998629,19cyclictest27467-21seq11:06:501
10696998624,24cyclictest12451-21cut07:14:501
10684998658,21cyclictest367-21ntpd11:34:480
10684998639,14cyclictest181rcu_preempt08:50:180
10684998636,13cyclictest181rcu_preempt12:16:150
10684998636,12cyclictest181rcu_preempt07:32:350
10712998515,53cyclictest0-21swapper/309:15:103
10705998562,14cyclictest0-21swapper/212:20:112
10696998542,36cyclictest0-21swapper/108:59:571
10696998530,42cyclictest0-21swapper/109:45:021
10696998530,21cyclictest11055-21seq08:48:551
10696998527,28cyclictest13409-21seq12:29:311
10696998527,28cyclictest13409-21seq12:29:311
10696998527,26cyclictest4931-21seq11:23:191
10696998523,29cyclictest20377-21ssh09:13:531
10696998522,28cyclictest14310-21ls10:45:431
10684998535,25cyclictest181rcu_preempt11:05:030
1070599844,71cyclictest28258-21/usr/sbin/munin09:25:212
1070599843,47cyclictest13507-21seq11:36:192
10696998427,25cyclictest10297-21seq11:31:051
10696998427,22cyclictest16272-21seq12:33:531
10696998427,22cyclictest16272-21seq12:33:531
10696998426,24cyclictest7192-21seq09:43:341
10696998426,18cyclictest20836-21seq10:55:471
10696998421,30cyclictest6596-21mailstats11:25:211
10684998446,17cyclictest181rcu_preempt10:03:220
10684998441,9cyclictest181rcu_preempt09:55:200
10705998361,8cyclictest181rcu_preempt11:24:232
10705998341,35cyclictest0-21swapper/211:30:202
1070599832,47cyclictest7267-21runrttasks09:43:462
10696998338,40cyclictest0-21swapper/109:30:131
10696998331,43cyclictest17292-21diskmemload12:35:151
10696998329,23cyclictest3721-21seq12:13:391
10696998328,23cyclictest29732-21seq09:28:181
10696998328,23cyclictest2852-21seq10:28:121
10696998328,23cyclictest2852-21seq10:28:121
10696998327,23cyclictest13558-21seq09:54:001
10696998326,26cyclictest23539-21seq11:53:091
10696998325,19cyclictest8195-21seq10:35:541
10696998321,30cyclictest26059-21acpi07:54:581
10696998321,30cyclictest26059-21acpi07:54:581
10696998319,24cyclictest0-21swapper/109:24:491
10684998360,15cyclictest17612-21diskmemload09:42:510
10684998358,16cyclictest20567-21cstates10:05:040
10705998243,33cyclictest334-21sh09:32:352
10705998240,34cyclictest0-21swapper/207:29:472
10705998240,34cyclictest0-21swapper/207:29:472
10696998231,20cyclictest13169-21seq08:55:071
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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