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2026-05-13 - 09:22
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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 Wed May 13, 2026 00:44:28)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3241121620,23sleep20-21swapper/218:57:372
32220212412,82sleep132175-21apt-get18:57:041
3252021159,66sleep032155-21/usr/sbin/munin18:57:520
1202991157,64cyclictest7388-21ssh22:47:181
12099911451,18cyclictest1176-21cyclictest23:06:192
1209991136,58cyclictest6544-21apt-get22:46:392
118899985,75cyclictest31571-21apt-get23:27:260
120999967,51cyclictest31226-21apt-get23:26:352
120999947,41cyclictest8682-21ssh21:01:362
118899921,41cyclictest0-21swapper/000:21:550
1202999148,9cyclictest181rcu_preempt00:06:331
1188999029,40cyclictest0-21swapper/022:31:550
1188999029,40cyclictest0-21swapper/022:31:550
120999893,33cyclictest352-21runrttasks20:50:192
118899897,73cyclictest22156-21apt-get23:11:330
118899897,73cyclictest22156-21apt-get23:11:330
1209998866,15cyclictest1176-21cyclictest00:21:182
120299885,60cyclictest8646-21apt-get21:01:381
118899883,61cyclictest14883-21apt-get22:06:310
1209998770,11cyclictest27771-21systemctl23:21:172
120999873,58cyclictest15426-21apt-get22:06:312
1202998767,14cyclictest58-21kcompactd022:56:421
1188998759,20cyclictest2460-21processes20:41:500
1209998664,15cyclictest1-21systemd22:39:052
1209998627,12cyclictest181rcu_preempt21:46:202
118899865,47cyclictest17487-21timerwakeupswit23:56:530
121499853,31cyclictest15504-21chrt22:06:393
1188998560,16cyclictest8081-21diskmemload22:26:560
1188998558,17cyclictest30145-21mailstats20:26:490
1188998558,17cyclictest30145-21mailstats20:26:490
1188998556,20cyclictest16381-21latency_hist19:46:190
1188998555,19cyclictest24089-21latency_hist22:21:200
1188998537,23cyclictest0-21swapper/021:02:200
120299847,66cyclictest6479-21ssh21:52:021
1202998459,17cyclictest4443-21apt-key00:31:181
1202998459,17cyclictest4443-21apt-key00:31:181
1188998425,33cyclictest0-21swapper/000:21:170
1209998363,15cyclictest1176-21cyclictest21:32:042
120999833,51cyclictest22156-21apt-get23:11:312
120999833,51cyclictest22156-21apt-get23:11:312
1202998361,16cyclictest16489-21latency_hist19:46:201
1202998353,8cyclictest181rcu_preempt22:07:241
1202998349,8cyclictest181rcu_preempt00:11:541
1202998311,57cyclictest22840-21tune2fs23:12:571
1202998311,57cyclictest22840-21tune2fs23:12:571
118899831,31cyclictest0-21swapper/020:36:320
118899831,31cyclictest0-21swapper/020:36:320
1209998255,13cyclictest181rcu_preempt22:13:372
1202998251,14cyclictest20212-21ssh21:21:071
1202998239,8cyclictest181rcu_preempt23:46:191
1188998264,12cyclictest277-21dbus-daemon23:36:180
1188998264,12cyclictest277-21dbus-daemon23:36:180
1209998164,11cyclictest503-21sh22:36:082
1209998164,11cyclictest503-21sh22:36:082
1209998160,14cyclictest28421-21kworker/u18:0-flush-179:020:01:402
1202998151,11cyclictest181rcu_preempt00:21:451
1202998149,14cyclictest5004-21ssh23:36:391
1202998137,31cyclictest6396-21idleruntime-cro19:16:171
1202998125,41cyclictest5891-21timerandwakeup20:51:531
1188998124,35cyclictest0-21swapper/020:06:340
118899812,36cyclictest0-21swapper/022:56:190
1188998120,34cyclictest0-21swapper/022:45:570
1188998112,39cyclictest30676-21apt-get23:26:160
1209998058,17cyclictest21619-21kworker/u18:2+events_unbound20:01:172
1209998058,17cyclictest21619-21kworker/u18:2+events_unbound20:01:172
1209998053,21cyclictest3308-21fschecks_count21:46:392
1202998045,10cyclictest21821-21ssh00:05:321
1202998045,10cyclictest21821-21ssh00:05:321
1202998041,14cyclictest25920-21ssh23:16:531
1188998059,12cyclictest26348-21ssh21:31:200
1188998048,11cyclictest29274-21sh21:36:180
1188998031,35cyclictest7094-21apt-get22:46:340
1188998030,25cyclictest0-21swapper/021:51:180
1188998012,53cyclictest5714-21apt-get21:51:470
120299796,53cyclictest31226-21apt-get23:26:311
118899793,34cyclictest19483-21apt-get00:01:350
118899793,34cyclictest19483-21apt-get00:01:350
121499783,34cyclictest31823-21chrt00:21:453
1209997852,8cyclictest181rcu_preempt21:54:032
1202997855,15cyclictest8081-21diskmemload21:56:441
1202997828,12cyclictest181rcu_preempt22:26:201
1188997813,32cyclictest0-21swapper/022:37:200
121499774,51cyclictest0-21swapper/323:11:313
121499774,51cyclictest0-21swapper/323:11:313
1209997760,11cyclictest0-21swapper/200:01:192
1209997759,12cyclictest26046-21ssh21:30:462
1209997748,11cyclictest181rcu_preempt22:26:192
1209997747,8cyclictest181rcu_preempt22:41:552
1209997746,21cyclictest19532-21modprobe19:56:162
1209997746,21cyclictest19532-21modprobe19:56:162
120299773,38cyclictest32494-21wc20:36:181
120299773,38cyclictest32494-21wc20:36:181
1188997759,9cyclictest0-21swapper/021:36:340
1188997759,9cyclictest0-21swapper/021:36:340
1188997759,13cyclictest10739-21kworker/u17:0+xprtiod00:11:340
1188997725,28cyclictest8081-21diskmemload23:46:180
121499763,33cyclictest22448-21chrt00:06:333
121499762,31cyclictest10101-21taskset19:26:283
1209997659,11cyclictest8081-21diskmemload23:06:392
120999762,25cyclictest15595-21timerwakeupswit21:11:522
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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