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2025-12-09 - 15:42
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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 rack3slot6.osadl.org (updated Tue Dec 09, 2025 12:45:03)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2875821230,6chrt28756-21grep11:05:371
782029960,26sleep10-21swapper/107:07:341
8244998645,15cyclictest26-21ksoftirqd/112:30:311
8244998451,9cyclictest26-21ksoftirqd/112:20:021
8244998249,9cyclictest26-21ksoftirqd/107:39:191
719028234,34sleep00-21swapper/007:05:260
8244998143,14cyclictest26-21ksoftirqd/112:00:351
8244998128,47cyclictest26-21ksoftirqd/108:05:251
16712780,6chrt1670-21wc08:20:291
8244997745,8cyclictest26-21ksoftirqd/112:05:241
8239997517,16cyclictest0-21swapper/012:10:200
8244997451,16cyclictest9274-21/usr/sbin/munin10:15:271
8244997334,13cyclictest26-21ksoftirqd/107:20:001
8244997321,8cyclictest26-21ksoftirqd/110:40:441
8244997321,8cyclictest26-21ksoftirqd/110:40:431
8239997321,17cyclictest448-21dbus-daemon10:55:010
8239997321,17cyclictest448-21dbus-daemon10:55:000
8239997234,12cyclictest14-21ksoftirqd/011:20:000
8244997156,9cyclictest26-21ksoftirqd/111:25:351
8244997126,9cyclictest26-21ksoftirqd/108:35:161
8244997048,9cyclictest26-21ksoftirqd/112:20:251
8244997048,9cyclictest26-21ksoftirqd/112:20:241
823999702,44cyclictest14-21ksoftirqd/007:50:200
8244996941,16cyclictest0-21swapper/108:12:291
8244996940,11cyclictest26-21ksoftirqd/110:30:321
8239996913,31cyclictest151rcu_preempt12:05:280
8244996853,10cyclictest26-21ksoftirqd/108:40:301
8244996847,15cyclictest26-21ksoftirqd/111:39:011
8244996846,16cyclictest26-21ksoftirqd/109:30:261
8244996733,14cyclictest26-21ksoftirqd/109:39:001
8244996732,14cyclictest26-21ksoftirqd/111:50:011
8244996731,13cyclictest26-21ksoftirqd/110:10:001
8244996730,15cyclictest26-21ksoftirqd/110:15:011
8239996747,9cyclictest14-21ksoftirqd/008:00:170
8244996630,14cyclictest26-21ksoftirqd/109:25:011
8239996646,14cyclictest0-21swapper/007:45:160
8244996528,14cyclictest26-21ksoftirqd/107:35:001
8239996536,25cyclictest14-21ksoftirqd/009:09:010
8239996512,47cyclictest0-21swapper/007:15:140
8244996430,14cyclictest26-21ksoftirqd/109:04:591
8244996430,13cyclictest26-21ksoftirqd/108:35:001
8244996429,11cyclictest26-21ksoftirqd/109:45:021
8244996428,14cyclictest26-21ksoftirqd/110:05:011
8244996428,14cyclictest26-21ksoftirqd/109:30:001
8244996427,14cyclictest26-21ksoftirqd/108:20:011
8244996425,17cyclictest26-21ksoftirqd/110:50:011
8244996330,21cyclictest26-21ksoftirqd/107:45:011
8244996328,14cyclictest26-21ksoftirqd/112:39:001
8244996327,15cyclictest26-21ksoftirqd/108:30:011
8244996326,14cyclictest26-21ksoftirqd/108:05:011
8244996227,13cyclictest26-21ksoftirqd/112:15:011
8239996226,27cyclictest14-21ksoftirqd/007:10:150
8244996130,13cyclictest26-21ksoftirqd/110:25:061
8244996127,14cyclictest26-21ksoftirqd/112:00:011
8244996125,14cyclictest26-21ksoftirqd/111:55:001
8244996124,14cyclictest26-21ksoftirqd/108:50:001
823999617,49cyclictest0-21swapper/011:40:350
8239996122,33cyclictest27835-21aten2.4-expect12:35:200
8239996113,19cyclictest0-21swapper/010:35:140
8244996027,14cyclictest26-21ksoftirqd/111:10:041
8244996027,14cyclictest26-21ksoftirqd/111:00:011
8244996027,14cyclictest26-21ksoftirqd/107:50:001
8244996024,14cyclictest26-21ksoftirqd/109:00:001
8244996024,14cyclictest26-21ksoftirqd/107:54:591
8244996024,14cyclictest26-21ksoftirqd/107:25:011
8244996024,14cyclictest26-21ksoftirqd/107:25:011
8239996016,15cyclictest0-21swapper/011:10:250
8244995935,18cyclictest26-21ksoftirqd/109:14:101
8244995925,13cyclictest26-21ksoftirqd/111:15:301
8244995924,13cyclictest26-21ksoftirqd/110:40:011
8244995924,13cyclictest26-21ksoftirqd/110:25:011
8244995921,15cyclictest26-21ksoftirqd/111:25:011
8244995914,18cyclictest26-21ksoftirqd/107:10:251
8239995931,16cyclictest0-21swapper/008:40:150
8244995824,14cyclictest26-21ksoftirqd/109:09:011
8244995823,14cyclictest26-21ksoftirqd/111:45:001
8244995823,14cyclictest26-21ksoftirqd/111:05:001
8244995823,14cyclictest26-21ksoftirqd/109:20:011
8244995823,14cyclictest26-21ksoftirqd/108:55:011
8244995822,14cyclictest26-21ksoftirqd/111:30:311
8244995821,12cyclictest26-21ksoftirqd/109:45:381
8244995819,16cyclictest0-21swapper/110:50:231
8244995819,16cyclictest0-21swapper/110:50:221
8239995830,16cyclictest0-21swapper/008:25:120
8239995830,15cyclictest0-21swapper/009:10:140
823999582,20cyclictest30665-21netstat08:10:280
8239995821,31cyclictest22644-21aten2.4-expect12:20:150
8239995821,31cyclictest22644-21aten2.4-expect12:20:150
8239995815,17cyclictest0-21swapper/011:50:180
8239995815,17cyclictest0-21swapper/008:30:130
8239995814,16cyclictest0-21swapper/012:15:140
8244995745,7cyclictest26-21ksoftirqd/107:59:191
8244995722,14cyclictest26-21ksoftirqd/107:25:181
823999575,32cyclictest0-21swapper/007:35:280
823999574,13cyclictest18726-21apt-get10:40:150
823999574,13cyclictest18726-21apt-get10:40:140
8239995732,14cyclictest0-21swapper/012:30:150
8239995730,18cyclictest14-21ksoftirqd/008:50:140
8239995720,31cyclictest9406-21aten2.4-expect10:15:190
8239995714,16cyclictest0-21swapper/009:45:180
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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