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2026-05-12 - 05:52
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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 Tue May 12, 2026 00:45:38)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
820921480,5sleep12699299cyclictest23:05:201
134491700,7ptp4l33-21ksoftirqd/222:15:132
137402660,6sleep00-21swapper/000:25:260
137402660,6sleep00-21swapper/000:25:260
134491660,4ptp4l32093-21ls23:55:281
2699499616,11cyclictest32065-21df_abs19:20:133
134491600,3ptp4l19639-21timerwakeupswit20:00:272
134491600,10ptp4l0-21swapper/100:00:331
134491570,4ptp4l0-21swapper/100:09:381
134491570,3ptp4l0-21swapper/123:30:281
134491570,3ptp4l0-21swapper/022:30:280
134491570,3ptp4l0-21swapper/000:20:220
2699499563,11cyclictest21260-21latency_hist23:35:013
134491560,4ptp4l0-21swapper/321:30:133
134491560,4ptp4l0-21swapper/123:26:401
134491560,4ptp4l0-21swapper/021:14:460
134491560,3ptp4l0-21swapper/100:10:121
134491560,3ptp4l0-21swapper/021:30:360
134491550,4ptp4l0-21swapper/120:43:321
134491550,2ptp4l0-21swapper/122:50:201
134491550,14ptp4l0-21swapper/223:41:462
134491550,13ptp4l0-21swapper/121:30:181
2699499545,14cyclictest16674-21fschecks_count22:15:143
2699499541,10cyclictest0-21swapper/320:35:123
134491540,4ptp4l0-21swapper/221:26:272
134491540,4ptp4l0-21swapper/123:36:441
134491540,4ptp4l0-21swapper/023:34:310
134491540,3ptp4l0-21swapper/100:35:201
26991995320,4cyclictest9-21ksoftirqd/019:30:000
134491530,4ptp4l0-21swapper/219:21:562
134491530,4ptp4l0-21swapper/122:10:131
134491530,4ptp4l0-21swapper/119:20:291
134491530,4ptp4l0-21swapper/022:43:230
134491530,4ptp4l0-21swapper/021:26:160
134491530,4ptp4l0-21swapper/020:28:530
134491530,3ptp4l0-21swapper/119:39:491
26991995222,4cyclictest9-21ksoftirqd/000:20:000
134491520,4ptp4l0-21swapper/223:13:452
134491520,4ptp4l0-21swapper/023:21:330
134491520,4ptp4l0-21swapper/020:51:410
134491520,4ptp4l0-21swapper/020:51:410
134491520,3ptp4l0-21swapper/020:31:380
2699499513,9cyclictest0-21swapper/321:10:223
2699499513,10cyclictest32452-21cat20:30:163
134491510,4ptp4l0-21swapper/023:54:250
134491510,4ptp4l0-21swapper/000:14:370
134491510,3ptp4l0-21swapper/023:06:250
134491510,17ptp4l0-21swapper/119:27:031
134491510,12ptp4l26327-21users19:05:281
2699499506,14cyclictest7673-21cat20:45:203
2699499506,11cyclictest0-21swapper/320:41:553
2699499506,10cyclictest0-21swapper/323:46:443
2699499506,10cyclictest0-21swapper/300:03:463
2699499503,18cyclictest24252-21date22:30:193
26991995022,3cyclictest9-21ksoftirqd/020:45:060
26991995014,7cyclictest9-21ksoftirqd/000:30:260
134491500,5ptp4l0-21swapper/219:14:042
134491500,4ptp4l0-21swapper/122:56:081
134491500,3ptp4l0-21swapper/100:21:061
134491500,3ptp4l0-21swapper/019:35:350
134491500,3ptp4l0-21swapper/000:05:370
2699499499,6cyclictest134491ptp4l22:13:123
2699499499,10cyclictest134491ptp4l22:45:253
2699499496,7cyclictest30799-21df23:55:153
2699499496,5cyclictest0-21swapper/323:39:593
2699499496,10cyclictest0-21swapper/321:08:233
2699499496,10cyclictest0-21swapper/319:36:563
2699499495,6cyclictest134491ptp4l22:23:313
26991994921,3cyclictest9-21ksoftirqd/023:00:180
26991994917,4cyclictest9-21ksoftirqd/021:05:010
26991994915,4cyclictest9-21ksoftirqd/022:15:160
134491490,5ptp4l0-21swapper/220:34:022
134491490,4ptp4l0-21swapper/220:48:322
134491490,4ptp4l0-21swapper/020:38:360
134491490,3ptp4l0-21swapper/222:23:072
134491490,3ptp4l0-21swapper/219:42:542
134491490,3ptp4l0-21swapper/121:05:171
134491490,3ptp4l0-21swapper/120:45:141
134491490,3ptp4l0-21swapper/100:28:581
134491490,3ptp4l0-21swapper/100:28:581
134491490,17ptp4l9-21ksoftirqd/019:24:400
2699499486,9cyclictest0-21swapper/323:14:323
2699499486,5cyclictest0-21swapper/320:29:183
26991994818,5cyclictest9-21ksoftirqd/023:10:150
134491480,5ptp4l0-21swapper/221:51:282
134491480,4ptp4l0-21swapper/123:15:031
134491480,4ptp4l0-21swapper/122:40:541
134491480,4ptp4l0-21swapper/122:15:151
134491480,4ptp4l0-21swapper/120:20:451
134491480,4ptp4l0-21swapper/020:41:040
134491480,4ptp4l0-21swapper/000:36:390
134491480,3ptp4l0-21swapper/120:59:491
134491480,3ptp4l0-21swapper/021:59:520
134491480,3ptp4l0-21swapper/021:44:500
134491480,3ptp4l0-21swapper/020:06:060
134491480,3ptp4l0-21swapper/019:32:500
2699499477,15cyclictest9070-21/usr/sbin/munin20:50:203
2699499477,15cyclictest9070-21/usr/sbin/munin20:50:203
2699499476,8cyclictest8454-21apt-get19:40:033
2699499476,6cyclictest0-21swapper/322:58:503
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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