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2026-04-18 - 15:26
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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 rackcslot8.osadl.org (updated Sat Apr 18, 2026 12:49:02)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3273913150,307ptp4l0-21swapper/107:06:391
3273913150,307ptp4l0-21swapper/107:06:391
35249929598,1cyclictest151rcu_preempt12:34:166
35249929598,1cyclictest151rcu_preempt12:34:156
34709922226,1cyclictest58-21ksoftirqd/710:17:5129
330891157149,6phc2sys0-21swapper/207:07:1412
330891157149,6phc2sys0-21swapper/207:07:1412
34629915319,96cyclictest0-21swapper/610:25:4928
34629915128,122cyclictest0-21swapper/610:33:5228
34629914725,78cyclictest0-21swapper/611:10:1328
34629914725,78cyclictest0-21swapper/611:10:1328
3510991440,85cyclictest0-21swapper/1208:42:204
35939914215,125cyclictest151rcu_preempt12:16:4616
35939914215,125cyclictest151rcu_preempt12:16:4616
3510991410,84cyclictest0-21swapper/1210:08:234
3510991410,84cyclictest0-21swapper/1209:45:244
35109913928,65cyclictest0-21swapper/1212:20:124
35109913928,65cyclictest0-21swapper/1212:20:124
35109913927,69cyclictest0-21swapper/1209:43:324
3510991390,83cyclictest0-21swapper/1212:05:024
3510991390,83cyclictest0-21swapper/1212:05:024
34499913934,104cyclictest0-21swapper/511:24:1627
35109913853,66cyclictest0-21swapper/1207:35:224
35939913742,71cyclictest0-21swapper/2312:38:4116
35939913742,71cyclictest0-21swapper/2312:38:4016
35629913760,40cyclictest0-21swapper/1910:30:2011
3510991370,85cyclictest0-21swapper/1208:05:174
35109913647,57cyclictest0-21swapper/1211:13:174
35109913647,57cyclictest0-21swapper/1211:13:174
35109913629,71cyclictest0-21swapper/1210:13:404
35109913629,69cyclictest0-21swapper/1209:50:274
35109913627,67cyclictest0-21swapper/1211:45:374
35109913627,65cyclictest0-21swapper/1208:25:124
3510991360,83cyclictest0-21swapper/1207:30:004
35339913530,67cyclictest0-21swapper/1511:07:397
35109913529,62cyclictest0-21swapper/1211:50:124
35109913529,62cyclictest0-21swapper/1211:50:114
35109913528,69cyclictest0-21swapper/1211:40:034
35109913528,69cyclictest0-21swapper/1211:40:024
35109913528,68cyclictest0-21swapper/1208:00:244
35109913523,72cyclictest0-21swapper/1212:27:344
35109913523,72cyclictest0-21swapper/1212:27:344
35109913521,71cyclictest0-21swapper/1211:30:104
35109913521,71cyclictest0-21swapper/1211:30:104
34499913547,58cyclictest0-21swapper/509:54:1727
34499913544,60cyclictest0-21swapper/511:34:1527
34499913544,60cyclictest0-21swapper/511:34:1427
35109913430,73cyclictest0-21swapper/1210:41:464
35109913429,69cyclictest0-21swapper/1210:31:344
35109913428,73cyclictest0-21swapper/1209:25:044
35109913428,69cyclictest0-21swapper/1209:35:444
35109913428,67cyclictest0-21swapper/1209:55:164
35109913425,77cyclictest0-21swapper/1207:55:194
35109913425,73cyclictest0-21swapper/1211:20:164
35339913327,62cyclictest0-21swapper/1512:29:287
35339913327,62cyclictest0-21swapper/1512:29:277
35109913357,72cyclictest0-21swapper/1207:45:244
35109913321,74cyclictest0-21swapper/1207:33:404
34499913322,69cyclictest0-21swapper/507:27:5227
35629913231,75cyclictest0-21swapper/1910:05:4511
35109913246,68cyclictest0-21swapper/1210:56:454
35109913229,72cyclictest0-21swapper/1212:33:264
35109913229,72cyclictest0-21swapper/1212:33:264
35109913229,59cyclictest0-21swapper/1210:17:264
35109913227,67cyclictest0-21swapper/1208:50:024
34499913248,56cyclictest0-21swapper/510:19:2527
34499913247,54cyclictest0-21swapper/509:29:1127
34499913247,52cyclictest0-21swapper/511:01:0627
35339913129,59cyclictest0-21swapper/1512:24:407
35339913129,59cyclictest0-21swapper/1512:24:407
35339913128,68cyclictest0-21swapper/1510:45:147
35339913128,57cyclictest0-21swapper/1510:20:377
35339913126,60cyclictest0-21swapper/1512:05:257
35339913126,60cyclictest0-21swapper/1512:05:257
35339913123,65cyclictest0-21swapper/1510:15:187
35109913131,72cyclictest0-21swapper/1209:00:144
35109913130,74cyclictest0-21swapper/1209:13:034
35109913129,78cyclictest0-21swapper/1211:00:294
35109913115,79cyclictest0-21swapper/1209:34:264
3510991310,80cyclictest0-21swapper/1210:25:424
34499913146,57cyclictest0-21swapper/507:30:2027
35339913029,57cyclictest0-21swapper/1510:51:077
35339913017,83cyclictest9491-21ssh10:25:457
35109913027,76cyclictest0-21swapper/1211:40:014
35109913024,75cyclictest0-21swapper/1207:20:334
34629913022,76cyclictest0-21swapper/609:32:5628
34499913051,59cyclictest0-21swapper/510:28:2927
34499913042,60cyclictest0-21swapper/509:13:4027
34499913040,67cyclictest0-21swapper/508:46:0427
34499913040,61cyclictest0-21swapper/509:49:2827
34499913028,66cyclictest0-21swapper/511:17:0927
34499913026,67cyclictest0-21swapper/507:46:4527
35939912942,54cyclictest0-21swapper/2309:40:0916
35939912940,59cyclictest0-21swapper/2312:20:3116
35939912940,59cyclictest0-21swapper/2312:20:3116
35629912928,100cyclictest0-21swapper/1907:50:0011
35339912929,59cyclictest0-21swapper/1509:54:597
35339912928,63cyclictest0-21swapper/1508:46:367
35109912931,76cyclictest0-21swapper/1212:12:224
35109912931,76cyclictest0-21swapper/1212:12:224
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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