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2026-08-07 - 22:56
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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 792 highest latencies:
System rackdslot1.osadl.org (updated Fri Aug 07, 2026 12:45:37)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
134491800,3ptp4l0-21swapper/210:15:042
209582720,5sleep10-21swapper/112:15:221
7700997118,10cyclictest17132-21chrt12:07:401
7700997116,11cyclictest18741-21chrt07:32:001
7700997114,12cyclictest32322-21ntpq08:00:211
7700997017,12cyclictest14311-21chrt07:24:051
7700997017,11cyclictest30900-21chrt11:25:431
7700997017,11cyclictest26385-21chrt07:50:041
7700997016,12cyclictest28871-21chrt12:32:151
7700997016,11cyclictest3187-21taskset08:09:241
7700996922,44cyclictest3563-21/usr/sbin/munin09:20:131
7700996917,11cyclictest19214-21chrt09:51:151
7700996915,11cyclictest23547-21chrt07:43:511
7700996913,16cyclictest414-21mailstats10:20:251
7700996910,14cyclictest27693-21ntp_states09:00:231
7700996818,11cyclictest5519-21chrt10:30:481
7700996817,13cyclictest10013-21chrt07:15:101
7700996817,11cyclictest12189-21chrt08:26:391
7700996816,11cyclictest2909-21chrt09:16:421
7700996816,11cyclictest26668-21chrt12:28:261
7699996836,4cyclictest9-21ksoftirqd/012:30:000
7700996718,11cyclictest26385-21chrt10:08:571
7700996717,9cyclictest26280-21chrt11:15:401
7700996717,12cyclictest9866-21chrt08:21:171
7700996717,12cyclictest10328-21taskset09:35:071
7700996717,11cyclictest12634-21taskset11:59:091
7700996717,10cyclictest7564-21chrt09:27:081
7700996717,10cyclictest19668-21chrt11:04:531
7700996716,11cyclictest9681-21taskset07:13:531
7700996716,11cyclictest7858-21taskset11:46:491
7700996713,11cyclictest1236-21date11:35:001
7700996617,11cyclictest5608-21chrt11:42:321
7700996617,11cyclictest19300-21taskset12:11:001
7700996617,11cyclictest17020-21taskset09:47:341
7700996617,11cyclictest16683-21taskset07:29:591
7699996631,4cyclictest9-21ksoftirqd/012:10:260
7699996628,3cyclictest121rcu_preempt09:50:270
7700996517,12cyclictest28595-21chrt11:20:381
7700996517,11cyclictest768-21chrt09:14:501
7700996517,11cyclictest24168-21chrt12:20:471
7700996517,11cyclictest21774-21chrt11:06:461
7700996517,11cyclictest21614-21chrt09:56:531
7700996517,10cyclictest3473-21chrt08:10:101
7700996517,10cyclictest21219-21taskset07:38:421
7700996517,10cyclictest21219-21taskset07:38:421
7700996516,11cyclictest14885-21chrt10:52:451
7700996516,10cyclictest28760-21chrt10:14:501
7700996515,11cyclictest23868-21taskset10:01:061
7700996417,11cyclictest3447-21taskset11:39:311
7700996417,11cyclictest30734-21chrt07:57:101
7700996417,11cyclictest23874-21chrt07:45:031
7700996417,11cyclictest21585-21chrt08:48:251
7700996417,11cyclictest21585-21chrt08:48:251
7700996417,10cyclictest30661-21chrt09:06:471
7700996416,11cyclictest21948-21chrt08:50:051
7700996416,11cyclictest1317-21runrttasks12:36:591
7700996414,11cyclictest240822chrt11:11:551
7699996434,4cyclictest9-21ksoftirqd/009:25:180
7700996317,11cyclictest3490-21chrt10:29:161
7700996317,11cyclictest14846-21chrt09:44:091
7700996316,10cyclictest19108-21taskset08:41:471
7700996312,12cyclictest6120-21fschecks_count08:15:161
7700996310,11cyclictest16697-21cat10:55:251
7699996333,3cyclictest9-21ksoftirqd/007:40:120
7699996329,6cyclictest9-21ksoftirqd/012:05:160
7700996218,11cyclictest10157-21chrt11:51:511
7700996217,12cyclictest10058-21chrt09:34:391
7699996231,5cyclictest9-21ksoftirqd/012:20:210
7699996231,4cyclictest9-21ksoftirqd/012:30:190
7699996225,4cyclictest9-21ksoftirqd/010:55:130
134491620,14ptp4l1301-21snmpd07:06:123
7700996118,10cyclictest14502-21chrt08:31:521
7700996117,10cyclictest7898-21taskset10:36:461
7700996113,10cyclictest15012-21taskset08:35:131
7700996111,11cyclictest8418-21/usr/sbin/munin10:40:291
7700996111,11cyclictest8418-21/usr/sbin/munin10:40:281
7699996128,3cyclictest9-21ksoftirqd/008:55:000
134491610,4ptp4l0-21swapper/212:10:152
770099602,10cyclictest0-21swapper/109:00:001
7700996015,11cyclictest14841-21chrt12:02:421
7700996013,11cyclictest12061-21mailstats10:45:241
7700996011,13cyclictest30699-21timerandwakeup10:15:281
7699996027,6cyclictest9-21ksoftirqd/009:15:210
134491600,4ptp4l0-21swapper/010:10:130
7699995930,5cyclictest9-21ksoftirqd/009:10:180
7699995919,10cyclictest9-21ksoftirqd/008:20:010
7699995829,6cyclictest9-21ksoftirqd/007:25:150
7699995828,5cyclictest9-21ksoftirqd/007:15:200
7699995827,6cyclictest9-21ksoftirqd/008:05:180
7699995827,5cyclictest9-21ksoftirqd/009:35:150
7699995825,6cyclictest9-21ksoftirqd/008:00:000
327672580,4sleep032762-21proc_pri10:20:230
134491580,5ptp4l0-21swapper/008:25:230
7699995729,5cyclictest9-21ksoftirqd/011:45:000
7699995728,5cyclictest9-21ksoftirqd/011:50:150
7699995728,5cyclictest9-21ksoftirqd/011:10:180
7699995728,5cyclictest9-21ksoftirqd/010:45:000
7699995728,5cyclictest9-21ksoftirqd/010:45:000
7699995727,5cyclictest9-21ksoftirqd/009:25:000
7699995725,5cyclictest9-21ksoftirqd/009:45:020
7699995724,5cyclictest9-21ksoftirqd/010:00:270
7699995723,5cyclictest9-21ksoftirqd/007:45:140
7699995721,4cyclictest9-21ksoftirqd/010:30:130
134491570,2ptp4l121rcu_preempt11:05:262
7699995625,5cyclictest9-21ksoftirqd/008:35:210
7699995624,3cyclictest9-21ksoftirqd/008:45:010
134491560,5ptp4l0-21swapper/309:05:213
134491560,5ptp4l0-21swapper/007:14:570
134491560,3ptp4l0-21swapper/209:05:482
134491560,11ptp4l0-21swapper/210:50:512
7699995526,6cyclictest9-21ksoftirqd/011:25:270
7699995524,5cyclictest9-21ksoftirqd/008:00:220
7699995523,5cyclictest9-21ksoftirqd/011:00:260
7699995523,5cyclictest9-21ksoftirqd/009:00:190
134491550,4ptp4l0-21swapper/309:21:493
134491550,4ptp4l0-21swapper/208:50:192
134491550,4ptp4l0-21swapper/009:49:130
134491550,4ptp4l0-21swapper/009:07:540
7699995434,6cyclictest9-21ksoftirqd/010:50:180
7699995430,6cyclictest9-21ksoftirqd/008:55:150
7699995425,9cyclictest9-21ksoftirqd/011:10:020
7699995423,6cyclictest9-21ksoftirqd/011:45:280
134491540,3ptp4l0-21swapper/007:36:480
134491540,3ptp4l0-21swapper/007:36:480
134491540,2ptp4l0-21swapper/207:05:072
7699995324,5cyclictest9-21ksoftirqd/010:45:240
7699995323,4cyclictest9-21ksoftirqd/010:15:010
134491530,4ptp4l0-21swapper/308:56:553
134491530,4ptp4l0-21swapper/212:00:132
134491530,4ptp4l0-21swapper/211:53:052
134491530,4ptp4l0-21swapper/209:24:312
134491530,4ptp4l0-21swapper/011:33:390
134491530,3ptp4l0-21swapper/208:42:272
769999527,3cyclictest9-21ksoftirqd/010:25:210
7699995225,3cyclictest9-21ksoftirqd/012:39:060
7699995220,5cyclictest9-21ksoftirqd/010:10:000
7699995211,4cyclictest9-21ksoftirqd/011:15:140
285922520,3sleep028589-21apt-config07:55:000
134491520,9ptp4l0-21swapper/308:21:323
134491520,3ptp4l0-21swapper/209:00:142
7699995127,8cyclictest9-21ksoftirqd/008:15:010
7699995124,5cyclictest9-21ksoftirqd/012:00:140
7699995118,5cyclictest9-21ksoftirqd/007:20:170
134491510,4ptp4l0-21swapper/312:06:353
134491510,4ptp4l0-21swapper/311:21:323
134491510,3ptp4l0-21swapper/309:50:363
769999505,3cyclictest9-21ksoftirqd/008:45:210
769999505,3cyclictest9-21ksoftirqd/008:45:210
769999503,3cyclictest121rcu_preempt11:55:300
7699995019,3cyclictest9-21ksoftirqd/010:35:140
134491500,4ptp4l0-21swapper/312:13:013
134491500,4ptp4l0-21swapper/308:29:173
134491500,4ptp4l0-21swapper/211:22:492
134491500,3ptp4l0-21swapper/210:20:142
134491500,3ptp4l0-21swapper/208:59:342
134491490,3ptp4l0-21swapper/308:52:223
769999480,5cyclictest9-21ksoftirqd/008:30:250
134491480,4ptp4l770199cyclictest08:35:452
134491480,4ptp4l0-21swapper/210:02:162
769999475,2cyclictest9-21ksoftirqd/008:20:250
769999470,6cyclictest17515-21ps07:30:190
769999470,3cyclictest121rcu_preempt09:30:110
134491470,3ptp4l0-21swapper/212:38:092
769999465,2cyclictest9-21ksoftirqd/012:15:010
134491460,4ptp4l0-21swapper/311:14:543
134491460,4ptp4l0-21swapper/309:32:103
134491460,4ptp4l0-21swapper/009:55:460
134491460,3ptp4l0-21swapper/210:30:012
134491460,3ptp4l0-21swapper/208:11:092
7699994533,3cyclictest9-21ksoftirqd/011:35:130
769999450,2cyclictest121rcu_preempt11:20:190
134491450,9ptp4l0-21swapper/210:07:402
134491450,6ptp4l7447-21ls07:10:003
134491450,4ptp4l5790-21apt-get08:15:132
134491450,4ptp4l0-21swapper/209:31:082
134491450,10ptp4l0-21swapper/307:43:073
134491450,10ptp4l0-21swapper/210:11:162
134491440,9ptp4l0-21swapper/208:27:172
134491440,4ptp4l0-21swapper/211:44:352
134491440,4ptp4l0-21swapper/209:25:562
134491440,4ptp4l0-21swapper/208:02:212
134491440,4ptp4l0-21swapper/207:17:282
134491440,3ptp4l0-21swapper/211:02:482
134491440,3ptp4l0-21swapper/207:10:462
134491440,10ptp4l0-21swapper/211:17:462
46198430,4rtkit-daemon0-21swapper/208:32:292
134491430,9ptp4l0-21swapper/208:20:372
134491430,9ptp4l0-21swapper/207:59:082
134491430,9ptp4l0-21swapper/207:51:232
134491430,5ptp4l0-21swapper/212:30:402
134491430,4ptp4l728-21users11:30:293
134491430,3ptp4l26322-21ls12:25:272
134491430,3ptp4l0-21swapper/207:30:562
134491430,10ptp4l0-21swapper/211:59:442
134491420,9ptp4l0-21swapper/209:58:322
134491420,5ptp4l0-21swapper/310:25:213
134491420,4ptp4l22856-21iostat_ios11:10:172
134491420,4ptp4l11786-21ntp_states11:55:253
134491420,4ptp4l0-21swapper/312:36:493
134491420,4ptp4l0-21swapper/312:28:313
134491420,4ptp4l0-21swapper/310:11:113
134491420,4ptp4l0-21swapper/211:49:592
134491420,4ptp4l0-21swapper/210:38:412
134491420,3ptp4l6060-21apt-get11:45:133
134491420,3ptp4l0-21swapper/312:30:413
134491420,3ptp4l0-21swapper/211:25:292
134491410,5ptp4l0-21swapper/307:50:243
134491410,4ptp4l9278-21irqstats10:40:202
134491410,4ptp4l9278-21irqstats10:40:202
134491410,4ptp4l20716-21iostat_ios12:15:212
134491410,4ptp4l18676-21ps09:50:272
134491410,4ptp4l0-21swapper/310:45:223
134491410,4ptp4l0-21swapper/310:35:483
134491410,4ptp4l0-21swapper/307:32:243
134491410,4ptp4l0-21swapper/211:31:012
134491410,3ptp4l31174-21apt-get09:10:133
134491410,3ptp4l10350-21apt-get09:35:133
7702994035,3cyclictest41-21ksoftirqd/310:55:133
134491400,6ptp4l0-21swapper/209:48:112
134491400,5ptp4l0-21swapper/208:45:162
134491400,5ptp4l0-21swapper/208:45:162
134491400,4ptp4l20557-21/usr/sbin/munin11:05:193
134491400,4ptp4l0-21swapper/310:05:283
134491400,4ptp4l0-21swapper/310:00:003
134491400,4ptp4l0-21swapper/309:25:113
134491400,4ptp4l0-21swapper/309:04:113
134491400,4ptp4l0-21swapper/209:42:362
134491400,4ptp4l0-21swapper/209:16:142
134491400,3ptp4l3767-21apt-get11:40:113
134491400,3ptp4l15747-21hddtemp_smartct10:55:162
134491400,3ptp4l0-21swapper/310:16:083
7702993934,3cyclictest41-21ksoftirqd/312:21:583
134491390,5ptp4l0-21swapper/212:05:142
134491390,5ptp4l0-21swapper/209:10:132
134491390,4ptp4l4176-21grep10:30:163
134491390,4ptp4l1455-21cpu10:25:132
134491390,4ptp4l0-21swapper/312:18:253
134491390,4ptp4l0-21swapper/311:50:283
134491390,4ptp4l0-21swapper/311:15:003
134491390,4ptp4l0-21swapper/310:40:283
134491390,4ptp4l0-21swapper/310:40:283
134491390,4ptp4l0-21swapper/310:20:293
134491390,4ptp4l0-21swapper/310:00:203
134491390,4ptp4l0-21swapper/309:46:443
134491390,4ptp4l0-21swapper/308:30:203
134491390,4ptp4l0-21swapper/307:57:123
134491390,4ptp4l0-21swapper/307:25:233
134491390,4ptp4l0-21swapper/307:15:263
134491390,4ptp4l0-21swapper/212:20:292
134491390,4ptp4l0-21swapper/209:37:052
134491390,4ptp4l0-21swapper/208:06:012
134491390,4ptp4l0-21swapper/207:45:062
134491390,4ptp4l0-21swapper/207:25:382
134491390,4ptp4l0-21swapper/207:21:262
134491390,3ptp4l17640-21apt-get11:00:113
134491390,3ptp4l13825-21meminfo09:40:193
134491380,5ptp4l0-21swapper/311:25:153
134491380,4ptp4l2496-21mailstats08:05:283
134491380,4ptp4l0-21swapper/312:00:083
134491380,4ptp4l0-21swapper/310:50:143
134491380,4ptp4l0-21swapper/309:15:233
134491380,4ptp4l0-21swapper/308:45:123
134491380,4ptp4l0-21swapper/308:45:123
134491380,4ptp4l0-21swapper/308:40:113
134491380,4ptp4l0-21swapper/308:35:023
134491380,4ptp4l0-21swapper/308:11:443
134491380,4ptp4l0-21swapper/211:35:292
134491380,4ptp4l0-21swapper/210:45:142
134491380,4ptp4l0-21swapper/207:40:412
134491380,4ptp4l0-21swapper/207:36:092
134491380,4ptp4l0-21swapper/207:36:092
134491380,3ptp4l0-21swapper/311:39:143
134491370,4ptp4l0-21swapper/308:15:463
134491370,4ptp4l0-21swapper/307:49:513
134491370,4ptp4l0-21swapper/307:20:403
134491370,3ptp4l0-21swapper/308:01:263
134491360,3ptp4l0-21swapper/307:37:493
134491360,3ptp4l0-21swapper/307:37:493
73932183,3sleep10-21swapper/107:09:491
72302173,3sleep00-21swapper/007:07:490
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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