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2026-03-14 - 06:51
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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 Sat Mar 14, 2026 00:45:36)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1344911460,15ptp4l0-21swapper/323:37:423
9012710,5sleep0111rcuc/021:10:150
9436996831,7cyclictest41-21ksoftirqd/300:35:243
9436996630,6cyclictest41-21ksoftirqd/321:20:153
134491650,21ptp4l18169-21ntp_states00:05:222
943699642,30cyclictest0-21swapper/300:04:243
221792640,7sleep3943699cyclictest23:05:153
134491640,5ptp4l0-21swapper/019:55:220
134491630,18ptp4l10142-21apt-get23:50:122
134491630,18ptp4l10142-21apt-get23:50:112
303472620,4sleep230343-21awk22:14:592
134491620,4ptp4l0-21swapper/221:28:362
134491600,4ptp4l0-21swapper/320:25:133
9436995920,7cyclictest41-21ksoftirqd/323:46:313
134491590,4ptp4l0-21swapper/020:25:160
943699581,12cyclictest0-21swapper/323:30:223
134491580,3ptp4l0-21swapper/220:40:462
134491580,3ptp4l0-21swapper/122:38:361
134491580,3ptp4l0-21swapper/120:29:581
134491580,3ptp4l0-21swapper/119:10:231
134491570,3ptp4l410-21fschecks_count20:00:131
943699564,8cyclictest41-21ksoftirqd/320:40:143
943699563,6cyclictest41-21ksoftirqd/322:35:163
9436995624,7cyclictest41-21ksoftirqd/321:33:563
943699562,11cyclictest0-21swapper/321:14:593
134491560,4ptp4l0-21swapper/119:37:041
134491560,3ptp4l0-21swapper/122:00:001
134491560,3ptp4l0-21swapper/120:36:281
134491560,3ptp4l0-21swapper/021:00:210
134491550,3ptp4l0-21swapper/223:34:572
134491550,3ptp4l0-21swapper/020:15:230
943699544,6cyclictest0-21swapper/319:25:153
943699543,6cyclictest41-21ksoftirqd/323:55:133
134491540,4ptp4l0-21swapper/222:20:362
134491540,4ptp4l0-21swapper/023:31:070
134491540,4ptp4l0-21swapper/019:16:390
134491540,3ptp4l5677-21cat20:10:190
943699533,7cyclictest0-21swapper/323:14:283
943699532,6cyclictest0-21swapper/300:15:223
943699531,7cyclictest12219-21ls19:15:163
943399537,3cyclictest9-21ksoftirqd/023:10:360
134491530,4ptp4l0-21swapper/000:07:500
134491530,3ptp4l0-21swapper/019:50:130
943699523,6cyclictest41-21ksoftirqd/300:20:243
943699523,5cyclictest401ktimersoftd/320:45:263
943699522,7cyclictest0-21swapper/322:20:243
943699522,5cyclictest41-21ksoftirqd/319:55:273
943699521,7cyclictest41-21ksoftirqd/321:00:153
943699521,6cyclictest0-21swapper/320:00:243
134491520,4ptp4l0-21swapper/119:15:401
134491520,4ptp4l0-21swapper/022:34:290
134491520,4ptp4l0-21swapper/019:25:000
134491520,3ptp4l0-21swapper/220:16:182
134491520,10ptp4l8766-21users19:05:251
943699515,7cyclictest41-21ksoftirqd/322:15:273
943699515,7cyclictest41-21ksoftirqd/322:15:273
943699512,6cyclictest0-21swapper/320:10:123
943699512,4cyclictest0-21swapper/300:25:123
943699512,11cyclictest0-21swapper/319:35:163
943699511,6cyclictest0-21swapper/321:19:023
943699511,5cyclictest41-21ksoftirqd/322:40:033
943699511,5cyclictest0-21swapper/300:10:163
134491510,4ptp4l0-21swapper/223:14:402
134491510,4ptp4l0-21swapper/221:32:182
134491510,4ptp4l0-21swapper/100:22:331
134491510,4ptp4l0-21swapper/023:05:430
134491510,3ptp4l0-21swapper/200:10:252
943699505,4cyclictest41-21ksoftirqd/322:00:263
943699504,6cyclictest41-21ksoftirqd/321:25:183
943699503,6cyclictest41-21ksoftirqd/322:25:153
943699503,5cyclictest41-21ksoftirqd/322:30:153
943699502,7cyclictest0-21swapper/300:05:113
943699502,6cyclictest41-21ksoftirqd/323:25:213
943699502,6cyclictest0-21swapper/321:45:593
943699502,6cyclictest0-21swapper/319:24:023
943699502,11cyclictest0-21swapper/321:55:233
943699500,6cyclictest41-21ksoftirqd/319:30:173
943699500,6cyclictest0-21swapper/321:50:263
134491500,4ptp4l0-21swapper/222:39:302
134491500,4ptp4l0-21swapper/221:46:152
134491500,4ptp4l0-21swapper/219:21:552
134491500,4ptp4l0-21swapper/123:42:221
134491500,4ptp4l0-21swapper/100:18:001
134491500,4ptp4l0-21swapper/020:42:150
134491500,4ptp4l0-21swapper/020:35:460
134491500,4ptp4l0-21swapper/020:22:500
134491500,4ptp4l0-21swapper/000:04:370
134491500,3ptp4l0-21swapper/220:20:122
134491500,3ptp4l0-21swapper/123:19:251
134491500,3ptp4l0-21swapper/122:15:231
134491500,3ptp4l0-21swapper/122:15:231
134491500,3ptp4l0-21swapper/021:39:570
943699495,8cyclictest41-21ksoftirqd/300:30:253
943699495,7cyclictest41-21ksoftirqd/321:35:283
943699494,8cyclictest41-21ksoftirqd/322:55:263
943699493,5cyclictest41-21ksoftirqd/319:40:183
943699492,7cyclictest41-21ksoftirqd/319:50:153
943699492,6cyclictest0-21swapper/320:09:233
943699492,5cyclictest0-21swapper/322:09:383
134491490,4ptp4l943399cyclictest20:52:320
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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