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2026-08-21 - 19:00
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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 Fri Aug 21, 2026 12:45:41)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
6807996637,3cyclictest41-21ksoftirqd/308:28:553
6807996634,7cyclictest41-21ksoftirqd/310:45:243
6807996633,4cyclictest41-21ksoftirqd/311:47:213
6807996533,8cyclictest41-21ksoftirqd/307:40:223
6807996533,4cyclictest41-21ksoftirqd/307:55:013
6807996533,4cyclictest41-21ksoftirqd/307:55:013
6807996532,7cyclictest41-21ksoftirqd/309:50:013
6807996530,4cyclictest41-21ksoftirqd/311:18:003
6807996529,8cyclictest41-21ksoftirqd/309:10:173
6807996432,7cyclictest41-21ksoftirqd/308:30:193
6807996429,8cyclictest41-21ksoftirqd/312:25:183
6807996429,7cyclictest41-21ksoftirqd/311:00:193
6807996425,7cyclictest41-21ksoftirqd/309:20:013
6807996425,10cyclictest41-21ksoftirqd/307:58:553
6807996333,7cyclictest41-21ksoftirqd/311:35:273
6807996333,3cyclictest41-21ksoftirqd/310:15:003
6807996330,4cyclictest41-21ksoftirqd/309:05:243
6807996329,4cyclictest41-21ksoftirqd/308:41:133
6807996322,7cyclictest41-21ksoftirqd/312:10:003
6807996231,4cyclictest41-21ksoftirqd/310:04:323
6807996230,8cyclictest41-21ksoftirqd/309:55:003
6807996229,6cyclictest41-21ksoftirqd/307:30:013
6807996226,10cyclictest41-21ksoftirqd/312:01:133
6807996226,10cyclictest41-21ksoftirqd/312:01:133
6807996132,8cyclictest41-21ksoftirqd/310:35:003
6807996131,7cyclictest41-21ksoftirqd/311:55:183
6807996131,7cyclictest41-21ksoftirqd/308:15:193
6807996131,4cyclictest41-21ksoftirqd/308:13:273
6807996131,3cyclictest41-21ksoftirqd/311:44:123
6807996130,7cyclictest41-21ksoftirqd/308:25:013
6807996130,4cyclictest41-21ksoftirqd/311:14:193
6807996130,4cyclictest41-21ksoftirqd/310:50:483
680799612,29cyclictest0-21swapper/310:15:583
6807996032,3cyclictest41-21ksoftirqd/312:12:443
6807996029,4cyclictest41-21ksoftirqd/311:21:213
6807996028,4cyclictest41-21ksoftirqd/310:22:083
6807996022,8cyclictest41-21ksoftirqd/311:30:233
6807996022,11cyclictest41-21ksoftirqd/312:18:023
6807995930,3cyclictest41-21ksoftirqd/307:18:353
6807995924,9cyclictest41-21ksoftirqd/311:00:003
6807995830,7cyclictest41-21ksoftirqd/308:50:253
6807995822,10cyclictest41-21ksoftirqd/310:40:083
6807995820,8cyclictest41-21ksoftirqd/310:08:193
6807995820,8cyclictest41-21ksoftirqd/310:08:193
6807995819,8cyclictest41-21ksoftirqd/309:31:333
134491580,3ptp4l6828-21ls11:45:262
6807995729,2cyclictest41-21ksoftirqd/307:37:273
6807995727,3cyclictest41-21ksoftirqd/312:30:183
6807995727,3cyclictest41-21ksoftirqd/309:25:273
6807995725,4cyclictest41-21ksoftirqd/311:05:253
6807995720,4cyclictest41-21ksoftirqd/308:10:013
134491570,4ptp4l0-21swapper/307:48:183
134491570,3ptp4l2456-21users11:35:280
134491570,3ptp4l0-21swapper/209:30:212
134491570,18ptp4l0-21swapper/012:32:320
680799567,3cyclictest41-21ksoftirqd/308:00:253
6807995629,6cyclictest41-21ksoftirqd/308:45:183
6807995622,8cyclictest41-21ksoftirqd/309:55:243
6807995621,7cyclictest41-21ksoftirqd/309:40:293
680799560,10cyclictest121rcu_preempt10:29:183
134491560,4ptp4l0-21swapper/110:15:241
134491560,3ptp4l0-21swapper/210:54:502
134491560,3ptp4l0-21swapper/207:22:362
134491560,3ptp4l0-21swapper/107:40:111
134491550,4ptp4l0-21swapper/110:11:371
6807995424,6cyclictest41-21ksoftirqd/307:10:493
134491540,4ptp4l0-21swapper/310:35:583
134491540,3ptp4l0-21swapper/209:35:212
134491530,11ptp4l5582-21ntp_states07:05:202
6807995226,6cyclictest41-21ksoftirqd/307:30:263
6807995222,7cyclictest41-21ksoftirqd/309:00:193
6807995214,10cyclictest41-21ksoftirqd/308:59:323
134491520,5ptp4l0-21swapper/307:05:283
134491520,4ptp4l18239-21chrt07:34:120
134491520,4ptp4l0-21swapper/311:25:013
134491510,9ptp4l0-21swapper/008:10:270
134491500,4ptp4l0-21swapper/212:23:302
134491500,4ptp4l0-21swapper/111:14:591
134491500,4ptp4l0-21swapper/109:03:441
134491500,4ptp4l0-21swapper/012:39:090
134491500,4ptp4l0-21swapper/008:42:090
134491500,3ptp4l0-21swapper/312:39:193
680799496,2cyclictest41-21ksoftirqd/309:35:183
680799491,3cyclictest121rcu_preempt07:22:203
134491490,16ptp4l0-21swapper/010:37:530
680799485,3cyclictest41-21ksoftirqd/308:35:183
6807994820,9cyclictest41-21ksoftirqd/311:55:003
6807994817,4cyclictest41-21ksoftirqd/312:20:243
134491480,4ptp4l0-21swapper/209:27:222
134491480,4ptp4l0-21swapper/010:20:080
134491480,4ptp4l0-21swapper/009:52:420
134491480,4ptp4l0-21swapper/009:28:330
134491480,4ptp4l0-21swapper/007:57:360
134491480,3ptp4l0-21swapper/008:15:290
134491470,4ptp4l0-21swapper/012:22:050
134491470,4ptp4l0-21swapper/012:19:360
134491470,4ptp4l0-21swapper/008:56:520
134491470,4ptp4l0-21swapper/008:49:040
134491470,3ptp4l0-21swapper/210:40:032
134491470,3ptp4l0-21swapper/010:01:480
134491470,16ptp4l9-21ksoftirqd/008:08:560
680799461,4cyclictest41-21ksoftirqd/309:20:163
134491460,4ptp4l0-21swapper/111:58:341
134491460,4ptp4l0-21swapper/110:00:311
134491460,4ptp4l0-21swapper/010:42:550
134491460,3ptp4l212-21systemd-journal08:27:322
134491460,3ptp4l0-21swapper/010:10:190
134491460,3ptp4l0-21swapper/008:22:260
134491460,12ptp4l0-21swapper/112:30:241
134491450,4ptp4l0-21swapper/208:20:532
134491450,4ptp4l0-21swapper/111:08:341
134491450,4ptp4l0-21swapper/007:26:280
134491450,3ptp4l121rcu_preempt11:15:000
134491450,3ptp4l0-21swapper/010:15:370
134491440,9ptp4l0-21swapper/209:20:082
134491440,5ptp4l0-21swapper/007:05:430
134491440,4ptp4l0-21swapper/109:59:181
134491440,3ptp4l0-21swapper/009:07:380
134491440,13ptp4l25-21ksoftirqd/112:36:291
6805994337,3cyclictest26877-21irqrtprio11:20:181
134491430,9ptp4l0-21swapper/212:39:062
134491430,9ptp4l0-21swapper/007:17:420
134491430,5ptp4l0-21swapper/112:00:261
134491430,5ptp4l0-21swapper/112:00:261
134491430,4ptp4l3945-21ls08:10:272
134491430,4ptp4l0-21swapper/207:43:262
134491430,4ptp4l0-21swapper/207:15:202
134491430,4ptp4l0-21swapper/007:38:420
134491430,3ptp4l0-21swapper/111:43:461
134491430,3ptp4l0-21swapper/107:51:521
134491430,3ptp4l0-21swapper/107:51:521
134491430,11ptp4l0-21swapper/210:33:542
6806994237,3cyclictest33-21ksoftirqd/209:20:002
6805994237,3cyclictest25-21ksoftirqd/108:45:001
134491420,9ptp4l0-21swapper/211:32:092
134491420,9ptp4l0-21swapper/207:55:592
134491420,9ptp4l0-21swapper/009:34:030
134491420,9ptp4l0-21swapper/008:30:050
134491420,5ptp4l11805-21df08:30:141
134491420,5ptp4l0-21swapper/110:25:151
134491420,3ptp4l11449-21apt-get07:20:111
134491420,10ptp4l0-21swapper/210:35:432
134491410,8ptp4l0-21swapper/210:19:572
134491410,8ptp4l0-21swapper/208:53:102
134491410,5ptp4l8471-21meminfo10:40:191
134491410,5ptp4l23532-21diskstats07:45:142
134491410,5ptp4l10785-21/usr/sbin/munin11:55:200
134491410,5ptp4l0-21swapper/210:55:112
134491410,5ptp4l0-21swapper/110:05:221
134491410,5ptp4l0-21swapper/110:05:211
134491410,4ptp4l3494-21meminfo09:20:200
134491410,4ptp4l26086-21iostat_ios07:50:160
134491410,4ptp4l26086-21iostat_ios07:50:160
134491410,4ptp4l24647-21ntp_states10:05:232
134491410,4ptp4l24647-21ntp_states10:05:232
134491410,4ptp4l0-21swapper/208:45:112
134491410,4ptp4l0-21swapper/010:30:580
134491410,3ptp4l27263-21ls11:20:210
134491410,3ptp4l16558-21apt-get09:50:112
134491410,3ptp4l0-21swapper/010:06:400
134491410,3ptp4l0-21swapper/010:06:400
6806994033,5cyclictest33-21ksoftirqd/208:16:512
6805994035,3cyclictest25-21ksoftirqd/108:05:011
6805994034,3cyclictest25-21ksoftirqd/112:30:001
6805994034,3cyclictest25-21ksoftirqd/108:30:011
134491400,5ptp4l9-21ksoftirqd/012:10:170
134491400,5ptp4l5713-21grep08:15:221
134491400,5ptp4l22136-21ps07:40:230
134491400,5ptp4l17302-21ntp_kernel_pll_08:40:222
134491400,5ptp4l0-21swapper/209:10:192
134491400,5ptp4l0-21swapper/109:10:271
134491400,5ptp4l0-21swapper/012:25:180
134491400,5ptp4l0-21swapper/011:30:200
134491400,5ptp4l0-21swapper/009:38:490
134491400,5ptp4l0-21swapper/009:10:170
134491400,4ptp4l20640-21memory12:15:201
134491400,4ptp4l16975-21df11:00:110
134491400,4ptp4l14261-21df_inode07:25:141
134491400,4ptp4l13120-21users07:20:260
134491400,4ptp4l0-21swapper/211:20:112
134491400,4ptp4l0-21swapper/211:10:192
134491400,4ptp4l0-21swapper/211:04:102
134491400,4ptp4l0-21swapper/110:45:251
134491400,4ptp4l0-21swapper/108:53:001
134491400,4ptp4l0-21swapper/012:06:470
134491400,4ptp4l0-21swapper/008:25:140
134491400,3ptp4l9973-21irqstats07:15:181
134491400,3ptp4l992-21irqstats09:15:190
134491400,3ptp4l9378-21users11:50:290
134491400,3ptp4l30106-21ls11:25:272
134491400,3ptp4l24337-21ntp_states07:45:230
134491400,3ptp4l23360-21apt-get08:55:122
6805993934,3cyclictest25-21ksoftirqd/111:30:001
6805993934,3cyclictest25-21ksoftirqd/107:50:001
6805993933,4cyclictest25-21ksoftirqd/111:00:001
134491390,6ptp4l0-21swapper/107:05:531
134491390,5ptp4l0-21swapper/210:00:172
134491390,5ptp4l0-21swapper/108:35:161
134491390,5ptp4l0-21swapper/011:05:100
134491390,5ptp4l0-21swapper/009:00:140
134491390,4ptp4l0-21swapper/211:44:372
134491390,4ptp4l0-21swapper/211:07:252
134491390,4ptp4l0-21swapper/209:48:272
134491390,4ptp4l0-21swapper/207:39:202
134491390,4ptp4l0-21swapper/207:10:032
134491390,4ptp4l0-21swapper/111:50:251
134491390,4ptp4l0-21swapper/111:38:001
134491390,4ptp4l0-21swapper/111:15:211
134491390,4ptp4l0-21swapper/109:20:291
134491390,4ptp4l0-21swapper/108:45:201
134491390,4ptp4l0-21swapper/107:30:251
134491390,4ptp4l0-21swapper/011:40:160
134491390,4ptp4l0-21swapper/011:26:050
134491390,4ptp4l0-21swapper/009:55:170
134491390,4ptp4l0-21swapper/008:35:190
134491390,4ptp4l0-21swapper/008:00:390
134491390,3ptp4l4016-21ntp_states10:30:211
134491390,3ptp4l24554-21/usr/sbin/munin11:15:170
134491390,3ptp4l12518-21/usr/sbin/munin12:00:200
134491390,3ptp4l12518-21/usr/sbin/munin12:00:200
134491390,3ptp4l1123-21ntp_states08:05:231
134491390,3ptp4l10109-21gpgv11:55:012
134491390,3ptp4l0-21swapper/212:06:102
134491390,3ptp4l0-21swapper/007:10:180
6805993833,3cyclictest25-21ksoftirqd/109:50:011
6805993833,3cyclictest25-21ksoftirqd/107:40:001
134491380,5ptp4l0-21swapper/010:25:170
134491380,4ptp4l13469-21timerandwakeup09:40:291
134491380,4ptp4l0-21swapper/212:31:002
134491380,4ptp4l0-21swapper/212:15:092
134491380,4ptp4l0-21swapper/212:10:172
134491380,4ptp4l0-21swapper/212:00:592
134491380,4ptp4l0-21swapper/212:00:592
134491380,4ptp4l0-21swapper/211:50:202
134491380,4ptp4l0-21swapper/211:15:522
134491380,4ptp4l0-21swapper/210:45:182
134491380,4ptp4l0-21swapper/210:25:572
134491380,4ptp4l0-21swapper/210:10:212
134491380,4ptp4l0-21swapper/209:56:082
134491380,4ptp4l0-21swapper/209:40:272
134491380,4ptp4l0-21swapper/209:05:132
134491380,4ptp4l0-21swapper/209:01:232
134491380,4ptp4l0-21swapper/208:30:252
134491380,4ptp4l0-21swapper/208:05:182
134491380,4ptp4l0-21swapper/208:00:022
134491380,4ptp4l0-21swapper/207:54:202
134491380,4ptp4l0-21swapper/207:54:202
134491380,4ptp4l0-21swapper/207:30:342
134491380,4ptp4l0-21swapper/112:11:431
134491380,4ptp4l0-21swapper/111:00:131
134491380,4ptp4l0-21swapper/110:51:551
134491380,4ptp4l0-21swapper/110:35:451
134491380,4ptp4l0-21swapper/110:20:121
134491380,4ptp4l0-21swapper/109:19:581
134491380,4ptp4l0-21swapper/109:05:561
134491380,4ptp4l0-21swapper/108:23:441
134491380,4ptp4l0-21swapper/108:10:151
134491380,4ptp4l0-21swapper/107:55:161
134491380,4ptp4l0-21swapper/107:10:261
134491380,4ptp4l0-21swapper/011:45:280
134491380,4ptp4l0-21swapper/010:58:040
134491380,4ptp4l0-21swapper/010:50:140
134491380,4ptp4l0-21swapper/010:45:060
134491380,4ptp4l0-21swapper/009:47:050
134491380,4ptp4l0-21swapper/009:40:100
134491380,3ptp4l13868-21apt-config07:25:002
134491380,3ptp4l0-21swapper/112:05:241
134491380,3ptp4l0-21swapper/008:52:250
6805993732,3cyclictest12158-21kworker/1:208:55:141
6805993731,3cyclictest25-21ksoftirqd/109:30:161
134491370,4ptp4l0-21swapper/208:36:292
134491370,4ptp4l0-21swapper/112:21:301
134491370,4ptp4l0-21swapper/111:30:171
134491370,4ptp4l0-21swapper/109:52:461
134491370,4ptp4l0-21swapper/109:35:561
134491370,4ptp4l0-21swapper/109:25:131
134491370,3ptp4l0-21swapper/212:25:092
134491370,3ptp4l0-21swapper/211:37:552
134491370,3ptp4l0-21swapper/210:20:012
134491370,3ptp4l0-21swapper/111:48:121
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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