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2026-08-14 - 04:25
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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 792 highest latencies:
System rackdslot1.osadl.org (updated Fri Aug 14, 2026 00:45:45)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2838421370,3sleep01729599cyclictest21:50:310
134491750,3ptp4l0-21swapper/019:20:170
17296997131,4cyclictest25-21ksoftirqd/122:10:171
17296996727,8cyclictest25-21ksoftirqd/121:45:291
1729899666,15cyclictest30198-21/usr/sbin/munin00:15:163
1729899666,10cyclictest20727-21sed21:35:203
1729899666,10cyclictest20727-21sed21:35:203
17296996528,7cyclictest25-21ksoftirqd/100:15:211
1729899649,10cyclictest26672-21latency_hist20:40:003
17298996410,10cyclictest17336-21sed20:20:003
134491640,5ptp4l0-21swapper/020:50:120
17298996310,9cyclictest29438-21cat23:05:003
1729899626,10cyclictest0-21swapper/319:10:193
1729899625,11cyclictest9117-21cut20:00:193
17296996229,7cyclictest25-21ksoftirqd/119:40:141
134491620,18ptp4l0-21swapper/019:55:250
134491620,18ptp4l0-21swapper/019:55:250
3102610,4sleep20-21swapper/220:50:242
1729899614,11cyclictest3040-21cut00:25:213
134491600,4ptp4l0-21swapper/023:32:530
134491600,2ptp4l18767-21kworker/2:122:49:342
1729899599,10cyclictest16635-21sed23:45:213
1729899596,11cyclictest8205-21sed00:35:273
1729899595,12cyclictest29224-21tail00:10:273
1729899595,11cyclictest31280-21latency_hist20:50:003
1729899594,9cyclictest448-21dbus-daemon22:25:263
17296995923,9cyclictest25-21ksoftirqd/119:45:271
134491590,4ptp4l0-21swapper/222:00:232
134491590,4ptp4l0-21swapper/221:53:532
1729899588,9cyclictest8278-21latency_hist21:10:003
1729899586,11cyclictest0-21swapper/321:45:213
1729899585,10cyclictest0-21swapper/322:55:003
134491580,4ptp4l0-21swapper/121:05:221
134491580,3ptp4l0-21swapper/322:35:273
134491580,3ptp4l0-21swapper/319:21:323
1729899579,10cyclictest27420-21awk00:10:003
1729899575,9cyclictest0-21swapper/321:20:303
1729899575,10cyclictest0-21swapper/322:30:273
1729899574,11cyclictest27039-21if_enp4s019:30:183
1729899574,11cyclictest0-21swapper/321:10:253
17296995722,7cyclictest25-21ksoftirqd/119:35:251
134491570,3ptp4l0-21swapper/200:10:122
134491570,3ptp4l0-21swapper/022:26:590
1729899568,6cyclictest134491ptp4l21:30:303
1729899563,11cyclictest31135-21/usr/sbin/munin19:40:273
1729699564,3cyclictest121rcu_preempt21:20:001
17296995624,10cyclictest25-21ksoftirqd/122:15:131
134491560,5ptp4l0-21swapper/219:06:472
134491560,4ptp4l0-21swapper/219:42:542
134491560,3ptp4l0-21swapper/222:40:252
134491560,3ptp4l0-21swapper/222:40:242
134491560,16ptp4l0-21swapper/223:46:582
1729899559,10cyclictest9534-21sed22:20:203
1729899555,10cyclictest30508-21sed23:05:203
1729899553,10cyclictest14263-21switchtime20:10:253
1729699552,6cyclictest13411-21cat20:10:171
134491550,5ptp4l0-21swapper/222:05:132
134491550,5ptp4l0-21swapper/019:40:130
134491550,4ptp4l0-21swapper/221:32:072
134491550,4ptp4l0-21swapper/023:49:340
134491550,3ptp4l0-21swapper/221:39:492
134491550,3ptp4l0-21swapper/221:39:492
1729899547,6cyclictest0-21swapper/320:58:543
1729899547,10cyclictest6418-21cat23:25:013
17296995425,7cyclictest25-21ksoftirqd/123:39:151
17296995422,7cyclictest25-21ksoftirqd/121:35:151
17296995422,7cyclictest25-21ksoftirqd/121:35:151
17296995422,6cyclictest25-21ksoftirqd/119:50:251
17296995421,8cyclictest25-21ksoftirqd/121:55:291
17296995421,7cyclictest25-21ksoftirqd/119:55:171
17296995421,7cyclictest25-21ksoftirqd/119:55:171
134491540,4ptp4l0-21swapper/219:21:392
1729899537,5cyclictest0-21swapper/320:40:453
1729899536,10cyclictest0-21swapper/300:20:143
1729699533,5cyclictest25-21ksoftirqd/119:15:181
17296995319,7cyclictest25-21ksoftirqd/122:36:371
134491530,4ptp4l0-21swapper/219:28:252
134491530,12ptp4l0-21swapper/019:35:170
1729899527,5cyclictest0-21swapper/320:23:203
1729899526,10cyclictest0-21swapper/321:58:243
1729899523,10cyclictest31920-21cat22:00:173
1729699527,7cyclictest10654-21cron22:25:001
1729699524,7cyclictest25-21ksoftirqd/123:10:001
1729699523,8cyclictest25-21ksoftirqd/120:45:271
1729699523,7cyclictest25-21ksoftirqd/121:45:011
1729699522,6cyclictest25-21ksoftirqd/123:25:261
1729699522,6cyclictest25-21ksoftirqd/120:50:211
17296995225,9cyclictest25-21ksoftirqd/100:30:151
1729699521,6cyclictest241ktimersoftd/121:35:001
1729699520,16cyclictest25-21ksoftirqd/123:45:251
1729899518,15cyclictest11031-21/usr/sbin/munin23:35:253
1729899517,5cyclictest0-21swapper/323:52:203
1729899516,6cyclictest0-21swapper/322:05:143
1729899515,9cyclictest0-21swapper/320:50:183
1729699514,9cyclictest25-21ksoftirqd/120:35:001
1729699512,12cyclictest0-21swapper/119:30:151
1729699510,5cyclictest25-21ksoftirqd/100:05:251
134491510,4ptp4l0-21swapper/200:23:502
134491510,4ptp4l0-21swapper/123:20:141
134491510,4ptp4l0-21swapper/000:09:340
1729899507,9cyclictest0-21swapper/319:55:193
1729899507,9cyclictest0-21swapper/319:55:193
1729899506,6cyclictest0-21swapper/322:45:283
1729899506,16cyclictest26046-21open_files22:55:223
1729899506,12cyclictest4100-21expr22:10:133
1729699505,6cyclictest25-21ksoftirqd/120:15:271
1729699504,8cyclictest25-21ksoftirqd/123:40:131
1729699504,8cyclictest25-21ksoftirqd/123:40:121
1729699503,7cyclictest3595-21apt-config22:10:011
1729699502,3cyclictest25-21ksoftirqd/119:10:271
17296995021,9cyclictest25-21ksoftirqd/100:25:201
1729699502,12cyclictest0-21swapper/122:30:271
1729699502,12cyclictest0-21swapper/122:00:241
1729699502,11cyclictest0-21swapper/120:35:221
17296995017,7cyclictest25-21ksoftirqd/120:40:061
1729699501,6cyclictest25-21ksoftirqd/100:20:201
1729699500,6cyclictest25-21ksoftirqd/120:00:171
134491500,3ptp4l25195-21missed_timers19:25:210
134491500,10ptp4l0-21swapper/222:20:122
134491500,10ptp4l0-21swapper/023:18:570
1729699496,2cyclictest121rcu_preempt00:03:301
1729699495,7cyclictest27813-21cpuspeed_turbos00:10:121
1729699494,4cyclictest23604-21kworker/1:022:55:001
1729699493,6cyclictest0-21swapper/121:02:581
1729699493,6cyclictest0-21swapper/121:02:581
1729699493,11cyclictest0-21swapper/120:20:241
1729699492,8cyclictest25-21ksoftirqd/120:55:171
134491490,4ptp4l0-21swapper/223:39:252
134491490,4ptp4l0-21swapper/219:48:282
134491490,4ptp4l0-21swapper/120:28:201
134491490,4ptp4l0-21swapper/023:29:050
1729899488,12cyclictest21357-21ntpq23:55:203
1729899487,6cyclictest0-21swapper/323:26:003
1729699483,5cyclictest241ktimersoftd/123:30:191
17296994827,8cyclictest25-21ksoftirqd/100:37:581
1729699482,6cyclictest0-21swapper/123:55:211
1729699480,7cyclictest25-21ksoftirqd/121:10:171
1729699480,5cyclictest25-21ksoftirqd/121:20:271
1729699480,5cyclictest15857-21if_enp4s021:25:211
134491480,4ptp4l0-21swapper/119:27:441
1729899476,8cyclictest0-21swapper/323:42:313
1729899476,8cyclictest0-21swapper/323:42:303
1729699476,7cyclictest25-21ksoftirqd/122:25:281
1729699473,8cyclictest25-21ksoftirqd/122:55:171
134491470,4ptp4l0-21swapper/000:15:430
134491470,3ptp4l0-21swapper/020:08:200
134491470,10ptp4l15155-21cat19:05:123
1729899466,8cyclictest16372-21ls21:25:253
1729799460,2cyclictest121rcu_preempt23:15:152
1729699463,7cyclictest25-21ksoftirqd/122:40:261
1729699463,7cyclictest25-21ksoftirqd/122:40:261
1729699463,7cyclictest22519-21ps19:20:191
17295994631,4cyclictest9-21ksoftirqd/022:15:000
134491460,9ptp4l0-21swapper/223:55:562
134491460,5ptp4l0-21swapper/019:07:300
134491460,4ptp4l0-21swapper/323:30:123
134491460,3ptp4l0-21swapper/000:20:550
1729799451,3cyclictest33-21ksoftirqd/219:54:592
1729699452,9cyclictest25-21ksoftirqd/121:50:201
1729699452,2cyclictest121rcu_preempt20:10:001
1729699451,7cyclictest25-21ksoftirqd/123:00:251
1729599451,9cyclictest9-21ksoftirqd/022:20:190
1729899445,9cyclictest0-21swapper/319:15:183
17297994439,3cyclictest33-21ksoftirqd/220:20:012
17297994439,3cyclictest33-21ksoftirqd/219:39:592
1729699444,7cyclictest25-21ksoftirqd/123:10:131
1729699444,7cyclictest25-21ksoftirqd/123:10:131
1729699443,7cyclictest25-21ksoftirqd/123:50:121
17295994439,3cyclictest9-21ksoftirqd/019:55:000
17295994413,3cyclictest9-21ksoftirqd/021:10:010
134491440,9ptp4l0-21swapper/200:19:452
134491440,4ptp4l0-21swapper/023:11:130
134491440,4ptp4l0-21swapper/023:11:130
1729899436,6cyclictest0-21swapper/322:15:233
17295994338,3cyclictest9-21ksoftirqd/020:34:590
17295994320,4cyclictest4955-21kworker/0:200:35:520
17295994311,4cyclictest9-21ksoftirqd/021:30:280
1729599430,2cyclictest134491ptp4l22:20:000
134491430,9ptp4l0-21swapper/221:11:482
134491430,9ptp4l0-21swapper/200:09:192
134491430,9ptp4l0-21swapper/021:23:250
134491430,4ptp4l3782-21apt-get21:00:102
134491430,4ptp4l3782-21apt-get21:00:102
134491430,4ptp4l0-21swapper/223:31:362
134491430,4ptp4l0-21swapper/221:57:292
134491430,4ptp4l0-21swapper/221:46:032
134491430,4ptp4l0-21swapper/023:09:120
134491430,3ptp4l0-21swapper/222:39:552
134491430,3ptp4l0-21swapper/220:33:212
134491430,3ptp4l0-21swapper/122:47:591
1729899424,9cyclictest25497-21ps19:25:263
1729699421,6cyclictest241ktimersoftd/123:20:001
17295994236,3cyclictest9-21ksoftirqd/022:45:010
17295994236,3cyclictest9-21ksoftirqd/022:45:000
17295994211,4cyclictest9-21ksoftirqd/020:45:210
134491420,9ptp4l0-21swapper/223:40:412
134491420,9ptp4l0-21swapper/223:40:412
134491420,9ptp4l0-21swapper/020:29:170
134491420,5ptp4l0-21swapper/320:05:193
134491420,5ptp4l0-21swapper/200:00:112
134491420,5ptp4l0-21swapper/021:55:020
134491420,4ptp4l6287-21apt-get22:15:112
134491420,4ptp4l4500-21apt-get00:30:132
134491420,4ptp4l27232-21apt-get23:00:112
134491420,4ptp4l22408-21apt-get22:50:122
134491420,4ptp4l1986-21iostat_ios20:55:180
134491420,4ptp4l0-21swapper/022:56:210
1729899417,7cyclictest2624-21irqstats23:15:193
1729899411,5cyclictest134491ptp4l21:40:233
17298994113,9cyclictest134491ptp4l19:50:213
17297994136,3cyclictest33-21ksoftirqd/221:00:012
1729599414,3cyclictest9-21ksoftirqd/022:05:220
134491410,8ptp4l0-21swapper/023:50:450
134491410,7ptp4l9-21ksoftirqd/022:37:590
134491410,4ptp4l0-21swapper/220:45:222
134491410,4ptp4l0-21swapper/023:44:310
134491410,4ptp4l0-21swapper/023:44:310
134491410,4ptp4l0-21swapper/022:46:340
134491410,4ptp4l0-21swapper/021:18:240
134491410,4ptp4l0-21swapper/021:03:520
134491410,4ptp4l0-21swapper/021:03:520
134491410,4ptp4l0-21swapper/000:30:200
134491410,4ptp4l0-21swapper/000:10:240
134491410,3ptp4l6798-21apt-get00:35:142
134491410,3ptp4l2011-21memory19:45:200
1729899407,10cyclictest0-21swapper/321:00:133
1729899407,10cyclictest0-21swapper/321:00:133
17297994036,3cyclictest33-21ksoftirqd/221:20:192
17297994035,3cyclictest33-21ksoftirqd/221:05:132
17297994035,3cyclictest33-21ksoftirqd/220:35:012
17295994032,3cyclictest9-21ksoftirqd/022:34:320
134491400,7ptp4l9-21ksoftirqd/021:47:350
134491400,6ptp4l0-21swapper/119:07:291
134491400,5ptp4l18274-21meminfo19:10:202
134491400,5ptp4l0-21swapper/320:25:143
134491400,5ptp4l0-21swapper/220:25:252
134491400,5ptp4l0-21swapper/220:03:142
134491400,4ptp4l30480-21meminfo23:05:202
134491400,4ptp4l22472-21df21:40:140
134491400,4ptp4l0-21swapper/223:25:142
134491400,4ptp4l0-21swapper/222:29:012
134491400,4ptp4l0-21swapper/220:43:092
134491400,4ptp4l0-21swapper/220:13:222
134491400,4ptp4l0-21swapper/023:20:240
134491400,4ptp4l0-21swapper/023:00:140
134491400,4ptp4l0-21swapper/022:00:170
134491400,4ptp4l0-21swapper/021:28:550
134491400,4ptp4l0-21swapper/020:44:310
134491400,4ptp4l0-21swapper/020:20:080
134491400,4ptp4l0-21swapper/020:18:160
134491400,4ptp4l0-21swapper/019:15:230
134491400,4ptp4l0-21swapper/000:25:290
134491400,3ptp4l21197-21ls23:55:180
134491400,3ptp4l0-21swapper/222:33:172
134491400,3ptp4l0-21swapper/221:19:172
1729899392,11cyclictest0-21swapper/300:31:243
17295993935,2cyclictest9-21ksoftirqd/019:10:240
134491390,4ptp4l26847-21diskstats19:30:152
134491390,4ptp4l0-21swapper/319:35:263
134491390,4ptp4l0-21swapper/300:03:313
134491390,4ptp4l0-21swapper/223:54:032
134491390,4ptp4l0-21swapper/223:21:502
134491390,4ptp4l0-21swapper/223:11:222
134491390,4ptp4l0-21swapper/223:11:222
134491390,4ptp4l0-21swapper/222:57:462
134491390,4ptp4l0-21swapper/222:14:572
134491390,4ptp4l0-21swapper/221:40:212
134491390,4ptp4l0-21swapper/220:21:132
134491390,4ptp4l0-21swapper/220:06:032
134491390,4ptp4l0-21swapper/200:26:102
134491390,4ptp4l0-21swapper/023:35:170
134491390,4ptp4l0-21swapper/022:50:040
134491390,4ptp4l0-21swapper/021:36:110
134491390,4ptp4l0-21swapper/021:36:110
134491390,4ptp4l0-21swapper/021:14:140
134491390,4ptp4l0-21swapper/020:00:340
134491390,4ptp4l0-21swapper/000:00:230
17295993833,3cyclictest9-21ksoftirqd/020:35:130
134491380,4ptp4l0-21swapper/321:50:263
134491380,4ptp4l0-21swapper/321:15:163
134491380,4ptp4l0-21swapper/320:32:203
134491380,4ptp4l0-21swapper/319:45:353
134491380,4ptp4l0-21swapper/219:57:292
134491380,4ptp4l0-21swapper/219:57:282
134491380,4ptp4l0-21swapper/020:13:120
134491380,3ptp4l0-21swapper/221:25:212
134491380,3ptp4l0-21swapper/019:30:260
134491370,5ptp4l0-21swapper/322:40:143
134491370,5ptp4l0-21swapper/322:40:143
134491370,3ptp4l0-21swapper/323:13:263
134491370,3ptp4l0-21swapper/323:13:263
134491370,3ptp4l0-21swapper/219:15:202
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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