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2026-05-02 - 12:37
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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 Sat May 02, 2026 00:45:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
208112740,5sleep10-21swapper/122:15:241
29802997331,8cyclictest41-21ksoftirqd/300:30:003
29802997033,4cyclictest41-21ksoftirqd/300:30:143
134491690,4ptp4l0-21swapper/000:05:260
29802996529,9cyclictest41-21ksoftirqd/321:10:193
29802996329,8cyclictest41-21ksoftirqd/322:45:133
29802996328,4cyclictest41-21ksoftirqd/319:20:123
29802996328,10cyclictest41-21ksoftirqd/319:42:493
134082610,3sleep30-21swapper/323:10:183
134491600,3ptp4l0-21swapper/022:00:170
134491600,18ptp4l0-21swapper/021:20:130
29802995927,9cyclictest41-21ksoftirqd/300:00:003
29802995924,3cyclictest41-21ksoftirqd/320:15:103
29802995923,4cyclictest41-21ksoftirqd/323:50:143
134491590,5ptp4l0-21swapper/019:45:200
134491590,4ptp4l0-21swapper/122:40:251
29802995818,4cyclictest41-21ksoftirqd/322:00:243
134491580,3ptp4l0-21swapper/100:20:251
134491580,3ptp4l0-21swapper/020:59:570
29802995727,4cyclictest41-21ksoftirqd/323:50:003
29802995725,10cyclictest41-21ksoftirqd/300:25:003
29802995724,6cyclictest41-21ksoftirqd/323:06:323
29802995724,6cyclictest41-21ksoftirqd/320:30:193
29802995721,4cyclictest41-21ksoftirqd/322:15:123
29802995719,4cyclictest41-21ksoftirqd/322:05:153
134491570,9ptp4l28309-21irqstats19:05:180
134491570,3ptp4l0-21swapper/120:35:241
29802995624,10cyclictest41-21ksoftirqd/320:10:193
29802995621,7cyclictest41-21ksoftirqd/323:20:283
29802995618,7cyclictest41-21ksoftirqd/319:48:493
134491560,4ptp4l0-21swapper/222:26:022
134491560,4ptp4l0-21swapper/220:48:532
134491560,4ptp4l0-21swapper/020:05:200
134491560,3ptp4l0-21swapper/100:00:231
134491560,3ptp4l0-21swapper/000:10:240
134491560,11ptp4l0-21swapper/021:04:270
29802995523,8cyclictest41-21ksoftirqd/320:50:173
29802995522,9cyclictest41-21ksoftirqd/322:50:123
2980299543,2cyclictest121rcu_preempt22:15:003
29802995425,7cyclictest41-21ksoftirqd/323:25:143
29802995423,8cyclictest41-21ksoftirqd/321:00:003
134491540,3ptp4l0-21swapper/000:30:240
134491540,12ptp4l0-21swapper/000:00:130
29802995325,9cyclictest41-21ksoftirqd/319:15:283
29802995323,8cyclictest41-21ksoftirqd/319:50:173
29802995320,7cyclictest41-21ksoftirqd/319:30:123
29802995320,4cyclictest41-21ksoftirqd/319:25:163
29802995316,10cyclictest41-21ksoftirqd/322:55:163
134491530,4ptp4l20182-21irqrtprio23:25:181
134491530,4ptp4l0-21swapper/122:55:191
134491530,4ptp4l0-21swapper/000:27:020
134491530,3ptp4l0-21swapper/023:59:000
134491530,3ptp4l0-21swapper/020:50:550
2980299524,8cyclictest41-21ksoftirqd/322:30:273
2980299523,4cyclictest41-21ksoftirqd/321:55:133
2980299523,2cyclictest41-21ksoftirqd/321:50:013
2980299522,7cyclictest121rcu_preempt22:40:493
29802995226,8cyclictest41-21ksoftirqd/319:55:223
29802995221,9cyclictest41-21ksoftirqd/319:14:593
134491520,4ptp4l0-21swapper/122:30:291
134491520,4ptp4l0-21swapper/122:14:171
129422520,4sleep02979999cyclictest23:10:160
2980299518,2cyclictest41-21ksoftirqd/300:05:193
2980299515,3cyclictest41-21ksoftirqd/322:25:203
2980299512,9cyclictest41-21ksoftirqd/321:40:163
2980299512,7cyclictest121rcu_preempt21:24:073
2980299512,6cyclictest0-21swapper/321:35:213
29802995120,10cyclictest41-21ksoftirqd/300:10:253
134491510,4ptp4l0-21swapper/123:14:351
134491510,4ptp4l0-21swapper/121:41:401
134491510,4ptp4l0-21swapper/020:13:110
134491510,3ptp4l0-21swapper/120:57:481
2980299506,2cyclictest41-21ksoftirqd/322:35:253
2980299505,8cyclictest41-21ksoftirqd/300:39:023
29802995023,7cyclictest41-21ksoftirqd/320:41:043
29802995022,7cyclictest41-21ksoftirqd/323:40:173
29802995019,9cyclictest41-21ksoftirqd/320:25:003
134491500,4ptp4l0-21swapper/219:07:122
134491500,4ptp4l0-21swapper/023:51:100
134491500,4ptp4l0-21swapper/023:42:410
134491500,3ptp4l0-21swapper/120:10:251
134491500,13ptp4l0-21swapper/021:52:420
134491500,11ptp4l0-21swapper/123:01:411
2980299494,8cyclictest11180-21runrttasks19:38:223
2980299494,3cyclictest121rcu_preempt20:06:153
2980299493,7cyclictest41-21ksoftirqd/320:25:143
29802994922,6cyclictest41-21ksoftirqd/300:01:293
2980199491,5cyclictest22838-21open_files23:30:222
134491490,4ptp4l0-21swapper/023:47:170
134491490,4ptp4l0-21swapper/022:33:160
134491490,4ptp4l0-21swapper/022:26:120
134491490,4ptp4l0-21swapper/022:23:400
134491490,4ptp4l0-21swapper/020:36:160
134491490,4ptp4l0-21swapper/020:28:510
134491490,3ptp4l0-21swapper/021:25:230
134491490,3ptp4l0-21swapper/000:19:280
2980299485,7cyclictest41-21ksoftirqd/323:00:233
2980299485,6cyclictest41-21ksoftirqd/323:40:003
2980299485,2cyclictest41-21ksoftirqd/323:15:253
2980299485,2cyclictest41-21ksoftirqd/323:15:253
2980299483,3cyclictest41-21ksoftirqd/321:05:183
29802994832,8cyclictest41-21ksoftirqd/321:20:003
2980299482,9cyclictest41-21ksoftirqd/320:45:233
29801994834,4cyclictest33-21ksoftirqd/221:35:202
2980199481,2cyclictest121rcu_preempt20:03:592
134491480,4ptp4l0-21swapper/100:37:181
134491480,4ptp4l0-21swapper/021:47:520
134491480,4ptp4l0-21swapper/020:46:240
134491480,3ptp4l0-21swapper/022:05:230
134491480,11ptp4l0-21swapper/020:44:050
2980299474,2cyclictest121rcu_preempt21:50:173
2980299472,3cyclictest121rcu_preempt20:01:093
2980299471,7cyclictest41-21ksoftirqd/322:20:163
2980299471,7cyclictest121rcu_preempt20:35:573
2980299471,3cyclictest121rcu_preempt21:34:143
2980199472,2cyclictest121rcu_preempt20:50:592
2980199472,2cyclictest121rcu_preempt00:13:582
134491470,4ptp4l0-21swapper/021:31:240
134491470,4ptp4l0-21swapper/000:23:170
134491470,3ptp4l0-21swapper/123:18:001
134491470,3ptp4l0-21swapper/123:18:001
134491470,3ptp4l0-21swapper/000:36:060
134491470,12ptp4l0-21swapper/022:41:090
2980299462,7cyclictest0-21swapper/300:20:003
2980299462,6cyclictest41-21ksoftirqd/321:00:133
29802994626,8cyclictest41-21ksoftirqd/321:29:393
2980299461,3cyclictest41-21ksoftirqd/323:30:133
134491460,4ptp4l6168-21iostat_ios22:55:190
134491460,4ptp4l0-21swapper/022:16:470
134491460,3ptp4l0-21swapper/019:10:370
29801994532,4cyclictest33-21ksoftirqd/219:30:122
29801994531,12cyclictest33-21ksoftirqd/220:10:012
2980199452,2cyclictest121rcu_preempt00:15:592
134491450,9ptp4l30247-21ls22:35:262
134491450,7ptp4l0-21swapper/119:05:161
134491450,3ptp4l0-21swapper/022:10:250
134491450,3ptp4l0-21swapper/021:57:480
29801994438,3cyclictest33-21ksoftirqd/222:50:002
29801994433,3cyclictest33-21ksoftirqd/200:30:152
29801994430,12cyclictest33-21ksoftirqd/219:35:172
2980199440,2cyclictest121rcu_preempt19:20:592
134491440,9ptp4l0-21swapper/220:40:342
134491440,4ptp4l5218-21apt-get21:45:032
134491440,3ptp4l30996-21apt-get22:40:112
134491440,3ptp4l2318-21gnome-shell00:27:581
134491440,3ptp4l0-21swapper/019:17:340
29801994332,2cyclictest33-21ksoftirqd/221:30:222
2980199431,2cyclictest121rcu_preempt19:46:592
134491430,9ptp4l0-21swapper/221:22:352
134491430,6ptp4l9-21ksoftirqd/020:02:270
134491430,5ptp4l0-21swapper/222:50:102
134491430,5ptp4l0-21swapper/220:35:102
134491430,5ptp4l0-21swapper/220:25:112
134491430,4ptp4l32392-21apt-get19:15:121
134491430,4ptp4l0-21swapper/023:30:070
134491430,10ptp4l0-21swapper/222:34:472
134491430,10ptp4l0-21swapper/120:29:591
2980199427,5cyclictest33-21ksoftirqd/223:48:402
2980199424,3cyclictest33-21ksoftirqd/222:55:292
29801994237,3cyclictest33-21ksoftirqd/222:05:002
29801994237,3cyclictest33-21ksoftirqd/220:00:002
29801994237,2cyclictest33-21ksoftirqd/221:40:182
29801994227,6cyclictest33-21ksoftirqd/200:25:032
29800994238,2cyclictest25-21ksoftirqd/121:04:591
134491420,9ptp4l0-21swapper/200:20:102
134491420,8ptp4l0-21swapper/223:10:332
134491420,6ptp4l0-21swapper/223:15:592
134491420,6ptp4l0-21swapper/223:15:592
134491420,5ptp4l3844-21ntp_states21:40:210
134491420,4ptp4l31873-21meminfo23:50:181
134491420,4ptp4l29245-21iostat_ios22:35:181
134491420,4ptp4l27278-21meminfo23:40:201
134491420,4ptp4l24081-21apt-get22:25:111
134491420,4ptp4l10773-21iostat23:05:151
134491420,4ptp4l10405-21iostat_ios21:55:171
134491420,4ptp4l0-21swapper/121:52:391
29801994130,9cyclictest33-21ksoftirqd/219:25:142
29801994130,3cyclictest33-21ksoftirqd/219:10:192
134491410,9ptp4l0-21swapper/219:44:512
134491410,8ptp4l0-21swapper/220:33:562
134491410,5ptp4l0-21swapper/121:15:101
134491410,5ptp4l0-21swapper/019:30:110
134491410,4ptp4l8345-21hddtemp_smartct23:00:170
134491410,4ptp4l29100-21hddtemp_smartct22:35:150
134491410,4ptp4l24237-21ntp_states20:05:221
134491410,4ptp4l14196-21diskstats19:45:231
134491410,4ptp4l0-21swapper/121:26:391
134491410,4ptp4l0-21swapper/120:15:461
134491410,3ptp4l26542-21meminfo21:20:181
134491410,3ptp4l2319-21apt-get20:30:110
134491410,3ptp4l21787-21apt-get22:20:111
134491410,3ptp4l12150-21apt-get22:00:111
46198400,4rtkit-daemon0-21swapper/220:59:552
29801994035,3cyclictest33-21ksoftirqd/222:15:012
29801994034,3cyclictest33-21ksoftirqd/221:50:242
29801994030,3cyclictest33-21ksoftirqd/221:55:182
29801994030,3cyclictest33-21ksoftirqd/200:35:182
134491400,9ptp4l0-21swapper/219:51:102
134491400,8ptp4l0-21swapper/223:26:232
134491400,8ptp4l0-21swapper/222:19:522
134491400,5ptp4l0-21swapper/219:15:032
134491400,5ptp4l0-21swapper/120:45:301
134491400,5ptp4l0-21swapper/023:35:130
134491400,5ptp4l0-21swapper/019:25:120
134491400,4ptp4l2065-21ntp_states22:45:211
134491400,4ptp4l19795-21ntp_states21:05:220
134491400,4ptp4l16476-21df_inode19:50:150
134491400,4ptp4l10216-21memory19:35:201
134491400,4ptp4l0-21swapper/223:55:322
134491400,4ptp4l0-21swapper/223:50:272
134491400,4ptp4l0-21swapper/221:15:232
134491400,4ptp4l0-21swapper/220:20:512
134491400,4ptp4l0-21swapper/200:08:342
134491400,4ptp4l0-21swapper/100:17:001
134491400,4ptp4l0-21swapper/100:10:141
134491400,4ptp4l0-21swapper/100:05:201
134491400,4ptp4l0-21swapper/023:15:210
134491400,4ptp4l0-21swapper/023:15:210
134491400,4ptp4l0-21swapper/019:57:510
134491400,4ptp4l0-21swapper/019:40:060
134491400,3ptp4l4247-21meminfo22:50:180
134491400,3ptp4l17906-21apt-get19:50:571
2980199397,4cyclictest33-21ksoftirqd/220:16:572
29800993933,4cyclictest25-21ksoftirqd/121:45:041
134491390,6ptp4l2528-21expr20:30:131
134491390,5ptp4l3816-21if_enp4s022:50:161
134491390,5ptp4l26760-21runrttasks23:40:162
134491390,5ptp4l0-21swapper/119:55:281
134491390,5ptp4l0-21swapper/021:15:260
134491390,4ptp4l24581-21iostat_ios23:35:171
134491390,4ptp4l21407-21hddtemp_smartct21:10:141
134491390,4ptp4l0-21swapper/223:39:132
134491390,4ptp4l0-21swapper/223:22:382
134491390,4ptp4l0-21swapper/222:05:512
134491390,4ptp4l0-21swapper/221:26:012
134491390,4ptp4l0-21swapper/221:05:522
134491390,4ptp4l0-21swapper/221:00:452
134491390,4ptp4l0-21swapper/220:10:502
134491390,4ptp4l0-21swapper/123:45:251
134491390,4ptp4l0-21swapper/120:40:131
134491390,4ptp4l0-21swapper/119:10:251
134491390,4ptp4l0-21swapper/023:23:440
134491390,4ptp4l0-21swapper/021:12:080
134491390,4ptp4l0-21swapper/020:21:110
134491390,4ptp4l0-21swapper/019:37:160
134491390,4ptp4l0-21swapper/019:20:180
134491390,3ptp4l7922-21memory19:30:211
134491390,3ptp4l1502-21iostat22:45:150
134491390,3ptp4l13387-21sshd19:41:571
134491390,3ptp4l10422-21df23:05:120
134491390,3ptp4l0-21swapper/200:00:242
134491390,3ptp4l0-21swapper/021:35:110
29801993834,2cyclictest33-21ksoftirqd/221:10:142
29801993828,3cyclictest33-21ksoftirqd/222:20:272
29801993827,3cyclictest33-21ksoftirqd/223:00:132
134491380,5ptp4l0-21swapper/120:00:211
134491380,4ptp4l0-21swapper/223:05:202
134491380,4ptp4l0-21swapper/123:35:001
134491380,4ptp4l0-21swapper/122:09:261
134491380,4ptp4l0-21swapper/121:30:061
134491380,4ptp4l0-21swapper/121:05:581
134491380,4ptp4l0-21swapper/120:53:531
134491380,4ptp4l0-21swapper/119:20:581
134491380,4ptp4l0-21swapper/020:16:260
134491380,3ptp4l30612-21/usr/sbin/munin20:20:171
134491380,3ptp4l18248-21ntpq23:20:231
134491380,3ptp4l0-21swapper/123:55:151
134491380,3ptp4l0-21swapper/119:27:561
134491380,3ptp4l0-21swapper/100:30:291
134491370,4ptp4l0-21swapper/023:25:070
134491370,3ptp4l0-21swapper/121:35:141
134491360,3ptp4l0-21swapper/319:06:463
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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