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2026-04-20 - 15:14
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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 Mon Apr 20, 2026 12:49:11)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3066999315118,2cyclictest151rcu_preempt11:19:0925
3273912460,237ptp4l0-21swapper/107:07:231
3273912460,237ptp4l0-21swapper/107:07:231
276932224216,6sleep140-21swapper/1407:05:216
276932224216,6sleep140-21swapper/1407:05:206
30556992085,186cyclictest0-21swapper/810:16:0430
30556991886,164cyclictest0-21swapper/812:35:1530
30556991886,164cyclictest0-21swapper/812:35:1530
30556991876,158cyclictest0-21swapper/812:15:1930
30556991876,158cyclictest0-21swapper/812:15:1830
30556991806,173cyclictest0-21swapper/811:25:1230
305569917319,151cyclictest64-21ksoftirqd/809:29:4030
30556991645,116cyclictest0-21swapper/810:09:0630
305749916232,100cyclictest0-21swapper/1109:17:133
30556991615,112cyclictest0-21swapper/812:35:0130
305419916120,140cyclictest0-21swapper/612:25:0328
305419916120,140cyclictest0-21swapper/612:25:0228
305749916028,43cyclictest0-21swapper/1107:40:163
305419916020,118cyclictest0-21swapper/610:46:0928
305749915829,81cyclictest0-21swapper/1109:45:183
305749915826,36cyclictest0-21swapper/1107:45:043
305419915820,88cyclictest0-21swapper/612:30:2228
30536991580,132cyclictest0-21swapper/510:35:1527
330891157148,6phc2sys0-21swapper/207:05:1512
330891157148,6phc2sys0-21swapper/207:05:1412
305749915726,117cyclictest25275-21diskstats07:55:133
305419915620,87cyclictest0-21swapper/609:15:1728
30556991556,88cyclictest0-21swapper/809:55:1430
30556991546,147cyclictest0-21swapper/808:45:1730
305189915378,74cyclictest0-21swapper/207:51:2112
305749915121,99cyclictest0-21swapper/1110:55:193
305749915121,107cyclictest0-21swapper/1108:00:403
306599915022,78cyclictest0-21swapper/2908:04:0422
305839915038,75cyclictest88-21ksoftirqd/1210:44:324
3052899150149,1cyclictest151rcu_preempt10:32:3126
3052899149149,0cyclictest40-21ksoftirqd/411:22:3126
3052899149149,0cyclictest40-21ksoftirqd/411:22:3126
30664991481,90cyclictest0-21swapper/3007:58:4424
30556991486,92cyclictest0-21swapper/811:05:1530
30556991475,96cyclictest0-21swapper/809:00:1230
30556991445,103cyclictest0-21swapper/811:15:2530
306649914324,70cyclictest0-21swapper/3012:00:2024
306649914324,70cyclictest0-21swapper/3012:00:1924
30556991426,90cyclictest0-21swapper/811:38:0530
305419914220,79cyclictest0-21swapper/611:15:0228
30536991400,81cyclictest0-21swapper/509:11:3327
305569913948,67cyclictest0-21swapper/810:35:2030
305569913846,64cyclictest0-21swapper/810:04:3930
305369913864,26cyclictest0-21swapper/511:56:1027
305369913864,26cyclictest0-21swapper/511:56:1027
306599913731,75cyclictest0-21swapper/2907:25:2322
305569913749,60cyclictest0-21swapper/811:59:4530
305569913749,60cyclictest0-21swapper/811:59:4430
306599913628,67cyclictest0-21swapper/2910:45:4822
306599913530,99cyclictest0-21swapper/2909:22:0622
306599913528,66cyclictest0-21swapper/2912:05:0722
306599913528,66cyclictest0-21swapper/2912:05:0622
306599913527,68cyclictest0-21swapper/2907:10:0622
305569913555,65cyclictest0-21swapper/810:45:0330
305569913549,54cyclictest0-21swapper/807:25:3530
305569913548,54cyclictest0-21swapper/807:21:2030
305569913544,56cyclictest0-21swapper/807:55:0030
305419913519,33cyclictest0-21swapper/612:15:5728
305419913519,33cyclictest0-21swapper/612:15:5728
306649913428,87cyclictest0-21swapper/3011:22:2224
306649913428,87cyclictest0-21swapper/3011:22:2124
306599913430,72cyclictest0-21swapper/2909:31:1022
306599913430,68cyclictest0-21swapper/2912:32:0722
306599913428,69cyclictest0-21swapper/2911:52:1822
306599913428,69cyclictest0-21swapper/2911:52:1722
306599913426,63cyclictest0-21swapper/2912:25:1322
306599913426,63cyclictest0-21swapper/2912:25:1322
305569913441,63cyclictest0-21swapper/809:40:1830
305569913434,65cyclictest0-21swapper/810:55:1430
305569913432,66cyclictest0-21swapper/811:42:3630
305569913432,66cyclictest0-21swapper/811:42:3530
305569913430,61cyclictest0-21swapper/809:18:0930
245462134125,6sleep60-21swapper/607:05:1328
245462134125,6sleep60-21swapper/607:05:1328
306599913332,69cyclictest0-21swapper/2912:24:2222
306599913332,69cyclictest0-21swapper/2912:24:2122
306599913331,69cyclictest0-21swapper/2910:00:2222
306599913329,69cyclictest0-21swapper/2907:44:1922
305569913354,66cyclictest0-21swapper/811:00:1230
305369913327,65cyclictest0-21swapper/511:08:0327
306599913237,60cyclictest0-21swapper/2909:41:2122
306599913232,71cyclictest0-21swapper/2911:20:1322
306599913232,71cyclictest0-21swapper/2911:20:1322
306599913229,70cyclictest0-21swapper/2907:38:5922
306599913228,64cyclictest0-21swapper/2909:00:5922
305569913233,68cyclictest0-21swapper/811:45:2230
305569913233,68cyclictest0-21swapper/811:45:2130
305569913229,65cyclictest0-21swapper/808:41:2930
305569913228,69cyclictest0-21swapper/811:30:2130
305569913228,67cyclictest0-21swapper/812:07:1530
305569913228,67cyclictest0-21swapper/812:07:1430
305569913226,69cyclictest0-21swapper/807:45:2230
305369913236,64cyclictest0-21swapper/512:00:3827
305369913236,64cyclictest0-21swapper/512:00:3727
305369913224,66cyclictest0-21swapper/509:20:2427
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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