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2025-12-08 - 17:25
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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 Mon Dec 08, 2025 12:45:35)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
744621350,6sleep11015299cyclictest11:40:181
2847191680,3ptp4l0-21swapper/212:12:162
2847191680,19ptp4l0-21swapper/212:30:242
1015299680,28cyclictest19005-21chrt07:27:411
1015299640,27cyclictest30195-21taskset12:29:481
1015299631,58cyclictest17475-21memory12:00:231
1015299631,23cyclictest11247-21sed08:20:191
1015299630,59cyclictest11712-21egrep11:50:141
1015299630,28cyclictest13365-21taskset10:44:571
1015299621,58cyclictest6374-21df_inode09:20:151
1015299620,21cyclictest14020-21phc2sys08:25:211
2847191610,5ptp4l0-21swapper/308:05:213
1015299610,21cyclictest2847191ptp4l12:08:411
1015299600,21cyclictest3562-21phc2sys11:30:271
2847191590,5ptp4l0-21swapper/209:38:102
2847191590,4ptp4l0-21swapper/309:15:583
1015299590,55cyclictest26707-21apt-get10:05:011
1015299590,28cyclictest28161-21taskset07:45:311
1015299590,27cyclictest3124-21chrt08:02:181
2847191580,4ptp4l0-21swapper/208:53:442
2847191580,4ptp4l0-21swapper/110:04:551
2847191580,4ptp4l0-21swapper/007:20:150
2847191580,3ptp4l0-21swapper/311:51:243
2847191580,3ptp4l0-21swapper/109:25:271
1015299582,52cyclictest0-21swapper/111:25:361
1015299580,24cyclictest2847191ptp4l10:55:141
2847191570,4ptp4l0-21swapper/212:26:352
2847191570,3ptp4l0-21swapper/207:25:242
2847191570,3ptp4l0-21swapper/108:18:541
2847191570,3ptp4l0-21swapper/107:19:281
2847191570,3ptp4l0-21swapper/012:05:210
2847191560,7ptp4l0-21swapper/208:56:032
2847191560,4ptp4l0-21swapper/309:13:273
2847191560,4ptp4l0-21swapper/307:39:293
2847191560,4ptp4l0-21swapper/209:27:022
2847191560,4ptp4l0-21swapper/208:33:032
2847191560,3ptp4l0-21swapper/211:02:412
1015299562,21cyclictest0-21swapper/112:30:241
1015299560,28cyclictest2638-21chrt12:39:151
1015299560,26cyclictest17453-21chrt08:35:041
2847191550,4ptp4l0-21swapper/309:27:473
2847191550,4ptp4l0-21swapper/211:40:332
2847191550,3ptp4l0-21swapper/208:10:552
263332550,4sleep00-21swapper/007:45:010
1015299552,22cyclictest0-21swapper/109:41:241
1015299550,26cyclictest23928-21chrt08:46:081
2847191540,4ptp4l0-21swapper/308:15:373
2847191540,4ptp4l0-21swapper/308:13:313
2847191540,4ptp4l0-21swapper/207:34:382
2847191540,3ptp4l0-21swapper/009:58:360
1015299540,28cyclictest30490-21seq07:50:411
2847191530,4ptp4l0-21swapper/309:51:283
2847191530,4ptp4l0-21swapper/210:58:462
2847191530,4ptp4l0-21swapper/210:41:012
2847191530,4ptp4l0-21swapper/209:18:292
2847191530,3ptp4l10688-21apt-get09:30:133
2847191530,3ptp4l0-21swapper/009:20:200
2847191530,3ptp4l0-21swapper/008:20:000
1015299532,23cyclictest0-21swapper/109:37:451
2847191520,4ptp4l0-21swapper/309:48:593
2847191520,4ptp4l0-21swapper/209:41:432
2847191520,4ptp4l0-21swapper/209:03:492
2847191520,3ptp4l1015199cyclictest08:12:140
2847191520,2ptp4l0-21swapper/008:45:030
2847191520,12ptp4l0-21swapper/211:05:182
2847191520,10ptp4l8984-21/usr/sbin/munin07:05:230
2847191520,10ptp4l0-21swapper/207:43:062
10154995216,3cyclictest41-21ksoftirqd/311:25:523
1015299522,22cyclictest0-21swapper/111:06:151
1015299521,31cyclictest25402-21seq12:17:561
1015299520,28cyclictest17779-21taskset10:52:181
1015299520,28cyclictest17779-21taskset10:52:181
1015299520,27cyclictest22682-21taskset11:04:571
2847191510,4ptp4l0-21swapper/311:22:393
2847191510,4ptp4l0-21swapper/310:21:213
2847191510,4ptp4l0-21swapper/310:21:213
2847191510,4ptp4l0-21swapper/208:43:152
2847191510,3ptp4l0-21swapper/210:13:512
180132510,5sleep20-21swapper/212:00:282
1015299512,24cyclictest0-21swapper/112:10:371
1015299512,24cyclictest0-21swapper/108:54:351
1015299510,28cyclictest1351-21taskset10:18:531
2847191500,4ptp4l0-21swapper/210:17:272
2847191500,12ptp4l0-21swapper/207:18:412
2847191500,10ptp4l0-21swapper/211:30:072
1015299500,25cyclictest10471-21taskset10:35:591
2847191490,3ptp4l0-21swapper/211:19:422
10154994916,3cyclictest41-21ksoftirqd/311:20:003
1015299495,26cyclictest12084-21seq07:13:031
1015299490,27cyclictest15148-21runrttasks08:30:101
1015299490,25cyclictest25904-21seq07:41:111
1015299490,19cyclictest2847191ptp4l09:05:141
41798480,4rtkit-daemon0-21swapper/312:16:273
2847191480,3ptp4l0-21swapper/109:10:331
2847191480,3ptp4l0-21swapper/009:54:010
2847191480,2ptp4l0-21swapper/007:49:120
1015499482,8cyclictest0-21swapper/312:10:363
10154994818,4cyclictest41-21ksoftirqd/308:41:393
1015299482,23cyclictest0-21swapper/110:24:301
1015299482,23cyclictest0-21swapper/110:24:301
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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