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2026-03-17 - 19:32
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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 Mar 17, 2026 12:45:39)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
592699812,3cyclictest0-21swapper/210:55:292
592599617,52cyclictest15577-21kworker/1:211:30:291
134491610,5ptp4l0-21swapper/012:31:330
134491610,2ptp4l0-21swapper/008:55:130
134491600,3ptp4l11565-21sed08:30:203
592699591,55cyclictest0-21swapper/210:41:292
592699591,55cyclictest0-21swapper/210:41:292
592599597,11cyclictest0-21swapper/111:57:371
592599597,10cyclictest0-21swapper/109:27:331
592699582,54cyclictest0-21swapper/210:39:092
592599583,18cyclictest134491ptp4l10:39:341
134491580,18ptp4l0-21swapper/307:35:273
592699572,53cyclictest0-21swapper/211:00:292
134691570,12getstats0-21swapper/311:48:403
134491570,4ptp4l0-21swapper/311:26:533
134491570,4ptp4l0-21swapper/211:08:142
134491570,4ptp4l0-21swapper/010:50:140
134491570,4ptp4l0-21swapper/010:19:260
134491570,3ptp4l0-21swapper/312:34:053
134491570,3ptp4l0-21swapper/208:07:402
134491560,19ptp4l1301-21snmpd07:52:060
134491560,12ptp4l0-21swapper/312:10:203
592599556,11cyclictest0-21swapper/109:18:511
592599556,10cyclictest0-21swapper/111:26:121
134491550,5ptp4l0-21swapper/011:51:460
134491550,4ptp4l0-21swapper/311:42:403
134491550,4ptp4l0-21swapper/010:44:420
134491550,4ptp4l0-21swapper/010:44:420
134491550,3ptp4l0-21swapper/210:22:492
134491550,2ptp4l0-21swapper/310:20:243
592599548,5cyclictest0-21swapper/108:56:361
592599546,10cyclictest15103-21switchtime12:05:271
592599542,10cyclictest9253-21missed_timers07:15:201
134491540,4ptp4l0-21swapper/010:07:290
134491540,4ptp4l0-21swapper/009:29:540
134491540,4ptp4l0-21swapper/007:34:160
134491540,4ptp4l0-21swapper/007:14:580
134491540,3ptp4l0-21swapper/207:45:552
592699531,51cyclictest0-21swapper/209:43:092
592699531,51cyclictest0-21swapper/209:43:092
592599536,10cyclictest0-21swapper/111:22:271
134491530,4ptp4l0-21swapper/009:35:190
134491530,4ptp4l0-21swapper/008:35:430
134491530,3ptp4l0-21swapper/311:10:353
134491530,3ptp4l0-21swapper/307:10:243
592599527,11cyclictest0-21swapper/110:00:351
592599525,10cyclictest28696-21sed09:05:271
134491520,4ptp4l0-21swapper/311:35:023
134491520,4ptp4l0-21swapper/308:19:553
134491520,3ptp4l0-21swapper/009:02:110
134491520,13ptp4l0-21swapper/009:40:240
134491520,13ptp4l0-21swapper/009:40:240
592599518,12cyclictest0-21swapper/109:34:481
592599514,10cyclictest16833-21systemctl08:40:241
134491510,4ptp4l0-21swapper/312:22:313
134491510,4ptp4l0-21swapper/309:45:593
134491510,4ptp4l0-21swapper/307:55:543
134491510,4ptp4l0-21swapper/012:36:420
134491510,4ptp4l0-21swapper/007:38:050
134491510,2ptp4l0-21swapper/010:47:170
592599508,6cyclictest0-21swapper/107:38:301
592599507,12cyclictest0-21swapper/107:22:491
592599506,11cyclictest0-21swapper/111:52:001
134491500,9ptp4l5257-21users07:05:261
134491500,4ptp4l0-21swapper/012:28:580
134491500,4ptp4l0-21swapper/011:18:110
134491500,3ptp4l0-21swapper/008:09:460
134491500,3ptp4l0-21swapper/007:21:150
134491500,12ptp4l0-21swapper/009:51:230
592699492,45cyclictest20072-21kworker/2:008:12:082
592599496,7cyclictest24707-21apt-get10:10:031
592599496,7cyclictest24707-21apt-get10:10:031
592599496,10cyclictest0-21swapper/109:54:331
592599494,6cyclictest137891phc2sys08:00:141
592599492,10cyclictest0-21swapper/108:45:131
134491490,6ptp4l5089-21ls07:05:260
592699483,44cyclictest0-21swapper/212:10:292
592699483,43cyclictest0-21swapper/211:10:182
592699482,44cyclictest0-21swapper/212:20:592
592699482,44cyclictest0-21swapper/208:15:192
592599487,11cyclictest0-21swapper/110:59:561
592599486,11cyclictest0-21swapper/111:12:201
592599483,10cyclictest24432-21awk11:15:281
134491480,4ptp4l0-21swapper/009:56:310
134491480,2ptp4l0-21swapper/011:34:150
592599476,8cyclictest23087-21hddtemp_smartct10:05:151
592599476,10cyclictest0-21swapper/112:25:441
592599474,7cyclictest2154-21apt-get11:40:121
134491470,4ptp4l0-21swapper/308:27:233
134491470,12ptp4l1301-21snmpd07:12:002
592699462,43cyclictest0-21swapper/212:26:192
134491460,15ptp4l0-21swapper/308:02:393
592699451,41cyclictest11504-21iostat_ios08:30:192
592599456,7cyclictest23455-21ntpq07:45:221
134491450,4ptp4l0-21swapper/312:17:273
134491450,3ptp4l0-21swapper/311:03:153
134491450,3ptp4l0-21swapper/308:48:153
134491450,3ptp4l0-21swapper/010:23:380
134491450,10ptp4l7975-21runrttasks09:30:402
592699443,40cyclictest0-21swapper/211:27:592
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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