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2026-10-22 - 03:11
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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 50 highest latencies:
System rackcslot8.osadl.org (updated Wed Oct 21, 2026 12:49:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3273913300,321ptp4l0-21swapper/107:05:201
1825599330132,2cyclictest151rcu_preempt12:15:3627
182879929499,3cyclictest151rcu_preempt09:56:4231
184379919191,1cyclictest151rcu_preempt11:27:4021
182369916233,127cyclictest0-21swapper/212:37:5912
182369916233,127cyclictest0-21swapper/212:37:5912
182369915833,90cyclictest0-21swapper/210:45:1212
182369915830,96cyclictest0-21swapper/210:58:3512
182369915428,82cyclictest0-21swapper/211:05:3212
182369915427,112cyclictest0-21swapper/208:10:2812
182369915427,112cyclictest0-21swapper/208:10:2712
183359915330,22cyclictest106-21ksoftirqd/1511:20:117
182369915025,101cyclictest0-21swapper/211:10:2012
330891149141,6phc2sys0-21swapper/207:09:3612
182369914417,101cyclictest0-21swapper/208:55:2312
18335991420,84cyclictest0-21swapper/1509:50:217
18244991420,90cyclictest0-21swapper/309:05:4623
182449913940,64cyclictest0-21swapper/312:24:3823
182449913940,64cyclictest0-21swapper/312:24:3823
18335991370,83cyclictest0-21swapper/1509:35:257
182449913629,64cyclictest0-21swapper/311:35:2923
182449913533,74cyclictest0-21swapper/309:32:0123
182449913430,73cyclictest0-21swapper/311:07:4023
182449913429,69cyclictest0-21swapper/310:13:2223
182639913267,63cyclictest0-21swapper/611:36:0428
182449913236,59cyclictest0-21swapper/307:37:2023
182449913236,59cyclictest0-21swapper/307:37:1923
182449913231,72cyclictest0-21swapper/310:43:0623
182449913231,68cyclictest0-21swapper/312:05:2523
182449913230,59cyclictest0-21swapper/310:54:0223
182369913224,24cyclictest0-21swapper/208:00:0412
182369913224,24cyclictest0-21swapper/208:00:0412
1823699132130,1cyclictest28-21ksoftirqd/212:02:4312
182449913129,67cyclictest0-21swapper/308:39:0623
18236991317,77cyclictest0-21swapper/208:39:0512
182369913120,76cyclictest0-21swapper/209:24:3112
182449913038,64cyclictest0-21swapper/308:13:2723
182449913038,64cyclictest0-21swapper/308:13:2623
182449913031,73cyclictest0-21swapper/307:25:5423
182449913031,73cyclictest0-21swapper/307:25:5323
182449913028,64cyclictest0-21swapper/311:27:5923
182449913025,64cyclictest0-21swapper/311:58:2823
182449912928,68cyclictest0-21swapper/311:47:4623
182449912927,77cyclictest0-21swapper/310:59:3923
182449912830,69cyclictest0-21swapper/311:21:0223
182449912827,66cyclictest0-21swapper/310:08:5423
182449912827,65cyclictest0-21swapper/312:10:1323
183359912726,74cyclictest0-21swapper/1510:52:567
182449912729,67cyclictest0-21swapper/308:46:1523
182449912728,66cyclictest0-21swapper/308:16:0823
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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