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2025-12-14 - 11:48
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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 376 highest latencies:
System rackdslot1.osadl.org (updated Sun Dec 14, 2025 00:45:36)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
134491680,5ptp4l18913-21threads00:10:352
134491660,34ptp4l9-21ksoftirqd/023:15:310
684926559,4sleep00-21swapper/019:09:230
134491650,4ptp4l0-21swapper/220:15:252
134491650,4ptp4l0-21swapper/023:40:230
28172620,4sleep12818-21latency_hist21:20:011
134491600,3ptp4l0-21swapper/123:35:001
134491590,3ptp4l0-21swapper/120:44:291
134491580,4ptp4l0-21swapper/221:44:222
134491580,4ptp4l0-21swapper/122:00:341
134491580,3ptp4l0-21swapper/319:16:523
134491580,3ptp4l0-21swapper/300:30:503
134491580,3ptp4l0-21swapper/122:37:101
134491580,3ptp4l0-21swapper/121:20:321
134491580,15ptp4l0-21swapper/319:56:193
134491570,3ptp4l0-21swapper/000:35:370
61702560,4sleep20-21swapper/219:05:272
134491550,4ptp4l0-21swapper/321:50:063
134491550,3ptp4l0-21swapper/000:07:290
718999547,6cyclictest0-21swapper/123:49:061
718999547,6cyclictest0-21swapper/121:43:111
718999544,7cyclictest25-21ksoftirqd/100:25:311
144992540,3sleep20-21swapper/221:45:012
134491540,5ptp4l0-21swapper/222:27:402
134491540,4ptp4l0-21swapper/223:44:352
134491540,3ptp4l0-21swapper/023:48:390
718999536,10cyclictest0-21swapper/122:30:561
134491530,4ptp4l0-21swapper/220:00:382
134491530,3ptp4l0-21swapper/321:55:053
134491530,3ptp4l0-21swapper/120:20:251
718999528,6cyclictest0-21swapper/123:21:261
718999527,6cyclictest0-21swapper/100:15:591
718999520,11cyclictest11743-21chrt21:38:421
134491520,4ptp4l0-21swapper/320:43:583
134491520,4ptp4l0-21swapper/222:50:522
134491520,4ptp4l0-21swapper/220:20:512
134491520,4ptp4l0-21swapper/220:10:232
134491520,3ptp4l3314-21apt-get22:30:222
718999516,8cyclictest0-21swapper/123:29:171
718999514,6cyclictest0-21swapper/120:35:221
718999514,6cyclictest0-21swapper/120:35:221
134491510,5ptp4l0-21swapper/319:09:023
134491510,4ptp4l0-21swapper/321:30:023
134491510,4ptp4l0-21swapper/223:07:292
134491510,4ptp4l0-21swapper/222:41:062
134491510,4ptp4l0-21swapper/222:37:142
134491510,4ptp4l0-21swapper/220:26:152
134491510,4ptp4l0-21swapper/219:36:222
134491510,3ptp4l0-21swapper/322:45:423
134491510,3ptp4l0-21swapper/322:02:403
134491510,11ptp4l0-21swapper/219:52:012
718999507,6cyclictest0-21swapper/122:52:381
718999506,8cyclictest0-21swapper/119:15:071
718999506,6cyclictest0-21swapper/121:10:091
718999502,6cyclictest25-21ksoftirqd/100:20:341
134491500,4ptp4l0-21swapper/320:59:513
134491500,4ptp4l0-21swapper/223:31:562
134491500,4ptp4l0-21swapper/223:01:092
134491500,4ptp4l0-21swapper/221:38:292
134491500,4ptp4l0-21swapper/221:12:532
134491500,4ptp4l0-21swapper/122:55:511
134491500,4ptp4l0-21swapper/121:03:431
134491500,4ptp4l0-21swapper/023:23:420
134491500,3ptp4l0-21swapper/019:50:350
718999493,6cyclictest25-21ksoftirqd/122:45:261
718999493,6cyclictest25-21ksoftirqd/121:25:231
7189994912,6cyclictest10113-21hddtemp_smartct20:25:231
718999490,12cyclictest19203-21taskset00:11:031
134491490,8ptp4l5800-21ls19:05:221
134491490,4ptp4l0-21swapper/222:46:292
134491490,4ptp4l0-21swapper/122:27:031
134491490,4ptp4l0-21swapper/022:27:390
718999482,6cyclictest25-21ksoftirqd/119:45:271
718999482,6cyclictest25-21ksoftirqd/119:45:271
134491480,4ptp4l718899cyclictest22:00:000
134491480,4ptp4l0-21swapper/322:40:383
134491480,4ptp4l0-21swapper/219:43:342
134491480,4ptp4l0-21swapper/123:41:401
134491480,3ptp4l0-21swapper/020:41:080
718999476,11cyclictest0-21swapper/121:48:071
718999474,6cyclictest0-21swapper/120:45:341
718999472,6cyclictest25-21ksoftirqd/122:05:351
134491470,5ptp4l0-21swapper/023:34:130
134491470,4ptp4l0-21swapper/321:01:003
134491470,4ptp4l0-21swapper/120:53:121
134491470,4ptp4l0-21swapper/020:18:100
134491470,3ptp4l0-21swapper/319:27:033
134491470,3ptp4l0-21swapper/319:23:523
134491470,3ptp4l0-21swapper/123:51:411
134491470,3ptp4l0-21swapper/100:30:051
134491470,3ptp4l0-21swapper/000:23:140
134491470,2ptp4l121rcu_preempt20:50:323
718999463,5cyclictest0-21swapper/120:10:301
718999460,7cyclictest25-21ksoftirqd/123:16:501
718999460,7cyclictest25-21ksoftirqd/121:53:261
134491460,15ptp4l9-21ksoftirqd/022:14:050
718999457,7cyclictest0-21swapper/122:23:171
718999451,6cyclictest25-21ksoftirqd/123:10:371
718999450,8cyclictest25-21ksoftirqd/119:30:311
718999450,6cyclictest25-21ksoftirqd/119:10:221
134491450,6ptp4l2318-21gnome-shell20:15:591
134491450,6ptp4l0-21swapper/222:15:212
134491450,4ptp4l26058-21apt-get21:00:212
134491450,4ptp4l0-21swapper/223:47:172
718999444,6cyclictest0-21swapper/123:09:281
39652440,21sleep23970-21needreboot21:20:292
134491440,4ptp4l0-21swapper/021:58:080
134491440,3ptp4l0-21swapper/321:07:303
134491440,11ptp4l0-21swapper/200:02:302
719099431,3cyclictest121rcu_preempt19:30:122
718999437,11cyclictest0-21swapper/100:00:011
718999433,6cyclictest25-21ksoftirqd/122:40:271
718999430,6cyclictest25-21ksoftirqd/119:50:271
134491430,9ptp4l0-21swapper/220:40:032
134491430,8ptp4l0-21swapper/223:13:382
134491430,8ptp4l0-21swapper/222:23:142
134491430,6ptp4l25272-21ntp_states22:05:320
134491430,5ptp4l0-21swapper/323:40:233
134491430,4ptp4l0-21swapper/021:47:170
134491430,10ptp4l0-21swapper/200:08:422
7190994231,9cyclictest33-21ksoftirqd/220:50:252
718999422,4cyclictest0-21swapper/122:15:201
718999420,5cyclictest0-21swapper/120:30:311
134491420,9ptp4l0-21swapper/223:53:282
134491420,9ptp4l0-21swapper/222:13:072
134491420,9ptp4l0-21swapper/221:32:482
134491420,9ptp4l0-21swapper/200:19:322
134491420,5ptp4l3488-21iostat21:20:260
134491420,5ptp4l29870-21users19:55:352
134491420,5ptp4l0-21swapper/322:25:203
134491420,5ptp4l0-21swapper/121:05:321
134491420,4ptp4l18973-21apt-get21:55:011
134491420,4ptp4l18735-21apt-get19:35:210
134491420,4ptp4l18604-21users21:50:360
134491420,4ptp4l12345-21df21:40:230
134491420,4ptp4l0-21swapper/319:45:343
134491420,4ptp4l0-21swapper/319:45:343
134491420,4ptp4l0-21swapper/219:25:192
134491420,12ptp4l0-21swapper/000:10:330
134491420,10ptp4l0-21swapper/320:03:573
134491420,10ptp4l0-21swapper/200:36:332
718999412,6cyclictest0-21swapper/119:55:231
134491410,9ptp4l0-21swapper/219:50:002
134491410,9ptp4l0-21swapper/219:50:002
134491410,8ptp4l0-21swapper/300:09:263
134491410,6ptp4l11855-21sed23:55:362
134491410,5ptp4l9-21ksoftirqd/022:30:240
134491410,5ptp4l32244-21sed21:10:360
134491410,5ptp4l28769-21iostat19:55:260
134491410,5ptp4l0-21swapper/119:20:211
134491410,5ptp4l0-21swapper/020:58:300
134491410,5ptp4l0-21swapper/000:15:210
134491410,4ptp4l8357-21hddtemp_smartct22:40:270
134491410,4ptp4l7523-21apt-get21:30:201
134491410,4ptp4l3712-21meminfo20:10:260
134491410,4ptp4l28076-21memory00:30:320
134491410,4ptp4l27944-21ls22:10:341
134491410,4ptp4l27006-21meminfo21:00:290
134491410,4ptp4l26966-21iostat_ios23:20:262
134491410,4ptp4l21046-21apt-get19:40:191
134491410,4ptp4l0-21swapper/319:30:223
134491410,4ptp4l0-21swapper/123:00:271
7190994035,3cyclictest33-21ksoftirqd/220:05:202
7190994035,3cyclictest33-21ksoftirqd/200:30:292
134491400,9ptp4l0-21swapper/019:29:310
134491400,5ptp4l8987-21sed23:50:280
134491400,5ptp4l0-21swapper/320:35:303
134491400,5ptp4l0-21swapper/320:35:293
134491400,5ptp4l0-21swapper/200:20:322
134491400,5ptp4l0-21swapper/022:21:250
134491400,5ptp4l0-21swapper/022:15:260
134491400,4ptp4l959-21iostat20:05:260
134491400,4ptp4l22290-21iostat23:10:270
134491400,4ptp4l0-21swapper/222:57:132
134491400,4ptp4l0-21swapper/222:05:242
134491400,4ptp4l0-21swapper/222:03:492
134491400,4ptp4l0-21swapper/221:55:522
134491400,4ptp4l0-21swapper/221:28:312
134491400,4ptp4l0-21swapper/221:15:232
134491400,4ptp4l0-21swapper/221:05:432
134491400,4ptp4l0-21swapper/022:59:450
134491400,4ptp4l0-21swapper/022:50:000
134491400,4ptp4l0-21swapper/022:38:270
134491400,4ptp4l0-21swapper/000:01:490
134491400,3ptp4l505-21apt-get21:15:223
134491400,3ptp4l31532-21ls20:00:280
134491400,3ptp4l31196-21apt-get23:30:191
134491400,3ptp4l2823-21users23:35:380
134491400,3ptp4l0-21swapper/220:49:052
7190993934,3cyclictest33-21ksoftirqd/223:15:202
718999393,6cyclictest25-21ksoftirqd/120:00:271
7189993933,3cyclictest25-21ksoftirqd/119:25:341
134491390,8ptp4l0-21swapper/223:29:112
134491390,5ptp4l10512-21cpuspeed_turbos23:55:231
134491390,5ptp4l0-21swapper/323:16:583
134491390,5ptp4l0-21swapper/320:20:203
134491390,5ptp4l0-21swapper/219:15:342
134491390,5ptp4l0-21swapper/120:05:211
134491390,5ptp4l0-21swapper/019:15:090
134491390,5ptp4l0-21swapper/000:25:580
134491390,4ptp4l7956-21iostat20:20:250
134491390,4ptp4l7792-21iostat19:10:212
134491390,4ptp4l212-21systemd-journal19:50:223
134491390,4ptp4l14976-21/usr/sbin/munin00:05:221
134491390,4ptp4l0-21swapper/322:35:323
134491390,4ptp4l0-21swapper/322:15:223
134491390,4ptp4l0-21swapper/321:21:553
134491390,4ptp4l0-21swapper/320:48:133
134491390,4ptp4l0-21swapper/320:30:143
134491390,4ptp4l0-21swapper/319:40:293
134491390,4ptp4l0-21swapper/319:10:213
134491390,4ptp4l0-21swapper/300:35:323
134491390,4ptp4l0-21swapper/221:50:222
134491390,4ptp4l0-21swapper/220:30:112
134491390,4ptp4l0-21swapper/219:24:542
134491390,4ptp4l0-21swapper/200:29:202
134491390,4ptp4l0-21swapper/100:39:511
134491390,4ptp4l0-21swapper/023:55:240
134491390,4ptp4l0-21swapper/022:51:560
134491390,4ptp4l0-21swapper/021:35:120
134491390,4ptp4l0-21swapper/021:15:270
134491390,4ptp4l0-21swapper/021:08:160
134491390,4ptp4l0-21swapper/020:53:570
134491390,4ptp4l0-21swapper/020:35:210
134491390,4ptp4l0-21swapper/020:35:210
134491390,4ptp4l0-21swapper/019:45:030
134491390,4ptp4l0-21swapper/019:45:030
134491390,4ptp4l0-21swapper/019:33:490
134491390,4ptp4l0-21swapper/019:24:050
134491390,4ptp4l0-21swapper/019:10:570
134491390,3ptp4l9982-21df_inode20:25:200
134491390,3ptp4l7824-21df_inode21:30:210
134491390,3ptp4l19403-21df_inode20:45:260
134491390,3ptp4l0-21swapper/322:52:013
134491390,3ptp4l0-21swapper/322:31:433
134491390,3ptp4l0-21swapper/321:45:323
7190993827,2cyclictest33-21ksoftirqd/220:55:342
718999383,8cyclictest25-21ksoftirqd/119:38:501
134491380,5ptp4l17598-21sort23:00:250
134491380,4ptp4l0-21swapper/323:45:163
134491380,4ptp4l0-21swapper/323:20:233
134491380,4ptp4l0-21swapper/323:05:293
134491380,4ptp4l0-21swapper/322:20:043
134491380,4ptp4l0-21swapper/322:06:303
134491380,4ptp4l0-21swapper/321:25:053
134491380,4ptp4l0-21swapper/320:05:313
134491380,4ptp4l0-21swapper/319:37:303
134491380,4ptp4l0-21swapper/300:26:413
134491380,4ptp4l0-21swapper/300:19:093
134491380,4ptp4l0-21swapper/300:12:583
134491380,4ptp4l0-21swapper/223:37:292
134491380,4ptp4l0-21swapper/220:36:532
134491380,4ptp4l0-21swapper/220:36:532
134491380,4ptp4l0-21swapper/120:56:491
134491380,4ptp4l0-21swapper/023:25:230
134491380,4ptp4l0-21swapper/023:05:340
134491380,4ptp4l0-21swapper/020:34:020
134491380,4ptp4l0-21swapper/019:41:320
134491380,3ptp4l0-21swapper/321:10:233
134491380,3ptp4l0-21swapper/021:25:100
134491370,4ptp4l0-21swapper/323:50:253
134491370,4ptp4l0-21swapper/323:30:523
134491370,4ptp4l0-21swapper/322:10:283
134491370,4ptp4l0-21swapper/321:35:433
134491370,4ptp4l0-21swapper/300:22:113
134491370,4ptp4l0-21swapper/300:02:523
134491370,3ptp4l0-21swapper/323:55:213
134491370,3ptp4l0-21swapper/323:28:433
134491370,3ptp4l0-21swapper/320:10:263
134491360,4ptp4l0-21swapper/320:26:183
134491360,3ptp4l0-21swapper/323:13:003
134491360,3ptp4l0-21swapper/322:55:583
134491350,4ptp4l0-21swapper/320:15:563
134491350,3ptp4l0-21swapper/321:44:473
134491340,3ptp4l0-21swapper/323:37:563
134491340,3ptp4l0-21swapper/323:02:503
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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