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2026-05-11 - 01:56
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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
Characteristics of the 100 highest latencies:
System rackdslot1.osadl.org (updated Sun May 10, 2026 12:45:34)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2941321530,6sleep12367499cyclictest08:30:201
55892780,5sleep20-21swapper/207:40:142
134491690,4ptp4l121rcu_preempt07:05:153
134491620,4ptp4l5736-21idleruntime10:00:161
134491620,4ptp4l0-21swapper/010:19:570
134491590,4ptp4l0-21swapper/309:32:303
2367399582,15cyclictest15340-21cat08:00:190
2367399581,14cyclictest0-21swapper/012:20:180
134491580,4ptp4l0-21swapper/308:35:183
134491580,3ptp4l0-21swapper/107:45:241
134491570,4ptp4l0-21swapper/111:25:161
134491570,3ptp4l0-21swapper/307:10:113
134491570,3ptp4l0-21swapper/111:30:271
134491570,3ptp4l0-21swapper/109:50:051
134491570,3ptp4l0-21swapper/012:09:570
2367399562,11cyclictest8443-21grep07:45:190
2367399561,12cyclictest31838-21cut10:55:210
232892560,5sleep10-21swapper/111:45:251
134491560,4ptp4l0-21swapper/108:55:191
2367399558,7cyclictest0-21swapper/007:35:220
2367399556,7cyclictest26801-21irqrtprio09:35:190
2367399551,10cyclictest18996-21sed11:35:270
22182550,7sleep32367699cyclictest09:50:253
218392550,3sleep20-21swapper/207:05:162
134491550,4ptp4l0-21swapper/009:45:160
134491550,3ptp4l0-21swapper/107:59:161
2367399548,10cyclictest0-21swapper/009:50:230
2367399546,7cyclictest0-21swapper/008:10:290
2367399544,7cyclictest13080-21latency_hist12:35:000
134491540,4ptp4l0-21swapper/111:51:181
134491540,4ptp4l0-21swapper/110:40:571
134491540,4ptp4l0-21swapper/109:28:091
134491540,3ptp4l0-21swapper/310:47:013
134491540,3ptp4l0-21swapper/110:24:561
2367399537,6cyclictest0-21swapper/008:25:250
2367399534,9cyclictest5910-21irqrtprio10:00:190
2367399532,10cyclictest30438-21grep12:00:230
2367399531,9cyclictest2319-21mailstats11:00:240
134491530,4ptp4l0-21swapper/310:31:533
134491530,4ptp4l0-21swapper/309:17:373
134491530,4ptp4l0-21swapper/308:08:063
134491530,4ptp4l0-21swapper/109:58:401
134491520,4ptp4l0-21swapper/109:19:461
134491520,11ptp4l0-21swapper/212:05:322
2367399517,7cyclictest0-21swapper/009:20:250
2367399515,6cyclictest12592-21idleruntime07:55:160
134491510,4ptp4l0-21swapper/307:22:583
134491510,4ptp4l0-21swapper/209:31:542
134491510,4ptp4l0-21swapper/111:39:441
134491510,4ptp4l0-21swapper/109:00:401
134491510,3ptp4l0-21swapper/308:30:273
134491510,3ptp4l0-21swapper/307:25:163
2367399508,6cyclictest0-21swapper/010:32:340
2367399506,7cyclictest12707-21fschecks_time09:05:170
2367399505,14cyclictest27625-21phc2sys10:45:230
2367399503,6cyclictest0-21swapper/011:40:150
134491500,8ptp4l0-21swapper/109:08:311
134491500,4ptp4l0-21swapper/310:38:273
134491500,4ptp4l0-21swapper/210:58:342
134491500,4ptp4l0-21swapper/210:37:102
134491500,3ptp4l0-21swapper/209:37:362
134491500,3ptp4l0-21swapper/208:36:512
2367399497,6cyclictest0-21swapper/007:50:240
2367399495,6cyclictest19332-21cut10:30:000
2367399495,4cyclictest0-21swapper/012:15:000
2367399491,11cyclictest10813-21cat10:10:190
134491490,9ptp4l0-21swapper/211:26:402
134491490,5ptp4l0-21swapper/007:05:190
134491490,4ptp4l0-21swapper/112:20:481
134491490,4ptp4l0-21swapper/111:59:141
134491490,4ptp4l0-21swapper/111:59:131
134491490,4ptp4l0-21swapper/111:00:121
134491490,3ptp4l0-21swapper/208:45:542
134491490,12ptp4l0-21swapper/210:05:192
2367399485,6cyclictest8894-21gzip10:05:240
2367399483,5cyclictest11620-21ntpq11:20:210
2367399481,17cyclictest7682-21latency_hist11:15:000
134491480,7ptp4l0-21swapper/212:27:082
134491480,4ptp4l0-21swapper/308:51:133
134491480,4ptp4l0-21swapper/208:18:172
134491480,4ptp4l0-21swapper/207:15:112
134491480,3ptp4l0-21swapper/308:01:553
134491470,4ptp4l0-21swapper/311:10:003
134491470,3ptp4l0-21swapper/310:04:033
134491470,3ptp4l0-21swapper/208:26:052
23674994633,3cyclictest25-21ksoftirqd/110:50:121
2367399466,6cyclictest0-21swapper/010:35:250
2367399466,5cyclictest9-21ksoftirqd/012:25:130
2367399462,6cyclictest9-21ksoftirqd/009:55:260
134491460,4ptp4l0-21swapper/310:23:103
134491460,3ptp4l0-21swapper/212:22:082
134491460,3ptp4l0-21swapper/211:20:092
134491460,3ptp4l0-21swapper/207:52:112
134491460,11ptp4l0-21swapper/310:14:273
23674994540,3cyclictest25-21ksoftirqd/111:15:001
2367399457,5cyclictest26753-21cat11:55:000
2367399452,9cyclictest24445-21iostat_ios08:20:180
2367399452,18cyclictest24086-21sed09:30:140
2367399450,7cyclictest16885-21apt-get09:15:120
134491450,5ptp4l0-21swapper/208:30:262
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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