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2026-03-13 - 17:51
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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 Mar 13, 2026 12:45:40)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
989621720,7sleep20-21swapper/207:10:012
1829821360,5sleep3995599cyclictest09:45:233
134491750,7ptp4l0-21swapper/309:06:503
9953996731,8cyclictest25-21ksoftirqd/111:35:281
995299631,16cyclictest27302-21ls11:15:130
134491630,3ptp4l31373-21taskset12:32:023
182092610,3sleep218203-21phc2sys08:35:212
182092610,3sleep218203-21phc2sys08:35:212
134491600,5ptp4l0-21swapper/007:10:160
9953995930,6cyclictest25-21ksoftirqd/111:45:121
9953995926,4cyclictest25-21ksoftirqd/108:00:201
9953995922,9cyclictest25-21ksoftirqd/110:10:011
9953995922,9cyclictest25-21ksoftirqd/110:10:011
156072590,5sleep315612-21irqrtprio09:40:173
134491590,5ptp4l0-21swapper/211:55:152
995399585,9cyclictest25-21ksoftirqd/108:55:221
995399584,9cyclictest25-21ksoftirqd/110:30:231
9953995729,4cyclictest25-21ksoftirqd/111:20:211
9953995729,10cyclictest25-21ksoftirqd/107:20:001
9953995728,6cyclictest25-21ksoftirqd/108:40:341
134491570,3ptp4l0-21swapper/212:30:152
995399565,9cyclictest25-21ksoftirqd/109:10:001
134491560,3ptp4l0-21swapper/309:23:583
134491560,3ptp4l0-21swapper/209:02:552
995399556,9cyclictest25-21ksoftirqd/109:15:221
134491550,4ptp4l0-21swapper/308:51:453
134491550,12ptp4l0-21swapper/310:37:263
995399544,10cyclictest25-21ksoftirqd/112:10:001
995399543,8cyclictest25-21ksoftirqd/111:15:001
995399542,9cyclictest25-21ksoftirqd/109:30:231
9953995417,6cyclictest25-21ksoftirqd/107:45:141
134491540,5ptp4l0-21swapper/311:45:213
134491540,4ptp4l0-21swapper/311:17:253
134491540,4ptp4l0-21swapper/308:46:473
995399534,8cyclictest25-21ksoftirqd/108:15:161
995399532,9cyclictest25-21ksoftirqd/111:40:161
9953995326,10cyclictest25-21ksoftirqd/112:20:261
178732530,4sleep10-21swapper/108:35:161
178732530,4sleep10-21swapper/108:35:161
134491530,4ptp4l0-21swapper/310:06:483
134491530,4ptp4l0-21swapper/210:04:192
995399526,9cyclictest25-21ksoftirqd/112:10:241
995399525,9cyclictest25-21ksoftirqd/110:00:221
995399524,9cyclictest25-21ksoftirqd/109:55:131
995399524,7cyclictest25-21ksoftirqd/111:15:181
995399523,8cyclictest25-21ksoftirqd/112:35:151
995399523,8cyclictest25-21ksoftirqd/109:50:141
995399523,8cyclictest25-21ksoftirqd/108:10:011
995399523,8cyclictest0-21swapper/112:00:261
9953995223,8cyclictest25-21ksoftirqd/108:25:251
9953995221,7cyclictest25-21ksoftirqd/109:10:151
995299527,6cyclictest9-21ksoftirqd/007:20:000
134491520,4ptp4l0-21swapper/311:04:473
134491520,4ptp4l0-21swapper/310:57:083
134491520,4ptp4l0-21swapper/008:28:030
134491520,4ptp4l0-21swapper/007:35:030
995399514,9cyclictest25-21ksoftirqd/109:40:181
995399512,6cyclictest25-21ksoftirqd/108:45:241
995399512,10cyclictest25-21ksoftirqd/112:30:151
9953995111,4cyclictest25-21ksoftirqd/111:57:551
995299516,6cyclictest0-21swapper/012:10:190
995299513,7cyclictest19602-21cut07:30:140
995299513,6cyclictest101ktimersoftd/012:05:230
134491510,5ptp4l0-21swapper/009:27:340
134491510,4ptp4l0-21swapper/310:43:173
134491510,4ptp4l0-21swapper/308:36:523
134491510,4ptp4l0-21swapper/308:36:523
134491510,4ptp4l0-21swapper/209:16:032
134491510,4ptp4l0-21swapper/010:31:540
134491510,4ptp4l0-21swapper/007:42:460
995399505,6cyclictest0-21swapper/110:05:101
995399503,6cyclictest25-21ksoftirqd/111:25:181
995399501,8cyclictest25-21ksoftirqd/110:55:221
995399500,6cyclictest25-21ksoftirqd/110:20:011
995399500,12cyclictest25-21ksoftirqd/108:25:001
995299508,6cyclictest9-21ksoftirqd/010:00:230
995299506,6cyclictest0-21swapper/008:57:400
995299505,6cyclictest0-21swapper/009:19:220
995299505,5cyclictest9-21ksoftirqd/008:10:240
134491500,4ptp4l0-21swapper/211:12:162
134491500,4ptp4l0-21swapper/211:08:442
134491500,4ptp4l0-21swapper/207:28:312
134491500,4ptp4l0-21swapper/011:13:370
134491500,4ptp4l0-21swapper/011:02:120
134491500,4ptp4l0-21swapper/008:53:520
995399494,9cyclictest25-21ksoftirqd/109:45:181
995399493,9cyclictest0-21swapper/111:55:011
995399493,8cyclictest25-21ksoftirqd/110:40:141
9953994924,4cyclictest25-21ksoftirqd/109:22:321
995399491,6cyclictest25-21ksoftirqd/110:40:011
995399491,6cyclictest25-21ksoftirqd/107:35:201
995399491,5cyclictest25-21ksoftirqd/110:45:261
995399490,7cyclictest25-21ksoftirqd/107:15:011
995399490,6cyclictest25-21ksoftirqd/110:15:181
995399490,6cyclictest25-21ksoftirqd/110:15:171
995399490,6cyclictest25-21ksoftirqd/107:45:001
995299494,5cyclictest492-21grep10:15:250
995299494,5cyclictest492-21grep10:15:250
134491490,4ptp4l0-21swapper/312:07:163
134491490,4ptp4l0-21swapper/310:49:363
134491490,4ptp4l0-21swapper/009:52:120
134491490,3ptp4l0-21swapper/311:29:443
134491490,3ptp4l0-21swapper/309:17:153
134491490,11ptp4l0-21swapper/307:05:103
9954994827,2cyclictest134491ptp4l11:36:282
995399482,8cyclictest25-21ksoftirqd/109:30:011
995399481,6cyclictest25-21ksoftirqd/111:35:001
995399481,6cyclictest25-21ksoftirqd/111:34:591
995399480,6cyclictest25-21ksoftirqd/109:40:001
995299487,5cyclictest9-21ksoftirqd/010:59:360
995299487,5cyclictest9-21ksoftirqd/008:05:230
995299486,5cyclictest9-21ksoftirqd/007:45:280
995299484,6cyclictest0-21swapper/008:35:220
995299484,6cyclictest0-21swapper/008:35:220
995299482,6cyclictest101ktimersoftd/010:45:190
134491480,4ptp4l0-21swapper/312:03:143
134491480,4ptp4l0-21swapper/309:13:233
134491480,4ptp4l0-21swapper/308:32:423
134491480,4ptp4l0-21swapper/307:53:363
134491480,4ptp4l0-21swapper/212:27:302
134491480,4ptp4l0-21swapper/212:22:202
995399474,9cyclictest25-21ksoftirqd/108:35:001
995399473,8cyclictest25-21ksoftirqd/111:10:001
995399473,8cyclictest25-21ksoftirqd/107:55:121
9953994731,7cyclictest25-21ksoftirqd/110:50:211
995399471,8cyclictest25-21ksoftirqd/112:15:161
995399471,7cyclictest25-21ksoftirqd/107:25:131
995399470,8cyclictest25-21ksoftirqd/112:25:271
995299476,5cyclictest9-21ksoftirqd/007:55:130
995299475,5cyclictest9-21ksoftirqd/008:00:240
9952994739,5cyclictest32640-21cat11:25:190
995299473,6cyclictest9-21ksoftirqd/011:45:210
9952994730,6cyclictest9-21ksoftirqd/009:55:150
995299472,7cyclictest13363-21cpuspeed_turbos11:55:130
995299472,6cyclictest101ktimersoftd/009:45:170
995299471,5cyclictest0-21swapper/010:25:010
134491470,4ptp4l0-21swapper/312:10:103
134491470,4ptp4l0-21swapper/308:56:343
134491470,4ptp4l0-21swapper/308:22:103
134491470,4ptp4l0-21swapper/308:10:483
134491470,4ptp4l0-21swapper/209:23:512
134491470,3ptp4l0-21swapper/307:59:253
134491470,3ptp4l0-21swapper/209:38:022
995399463,6cyclictest25-21ksoftirqd/108:10:171
995399460,6cyclictest25-21ksoftirqd/107:20:171
995299467,5cyclictest9-21ksoftirqd/008:45:220
995299465,6cyclictest0-21swapper/008:15:250
995299464,6cyclictest0-21swapper/009:40:220
995299464,5cyclictest30298-21gzip10:10:230
995299464,5cyclictest30298-21gzip10:10:230
995299463,6cyclictest10552-21fschecks_time08:20:140
995299463,6cyclictest0-21swapper/010:25:230
995299463,6cyclictest0-21swapper/009:30:250
995299462,7cyclictest0-21swapper/011:50:190
995299461,7cyclictest17064-21sed10:50:250
995299461,6cyclictest101ktimersoftd/008:40:210
995299461,5cyclictest0-21swapper/012:27:410
134491460,4ptp4l0-21swapper/309:58:063
134491460,3ptp4l0-21swapper/309:00:283
134491460,12ptp4l0-21swapper/012:20:130
134491460,12ptp4l0-21swapper/011:35:160
9954994539,3cyclictest33-21ksoftirqd/210:15:002
9954994539,3cyclictest33-21ksoftirqd/210:15:002
9953994529,7cyclictest25-21ksoftirqd/110:25:151
995399452,8cyclictest25-21ksoftirqd/108:50:151
995299457,6cyclictest9-21ksoftirqd/012:30:180
995299456,5cyclictest9-21ksoftirqd/010:05:210
995299456,5cyclictest9-21ksoftirqd/009:10:180
995299455,5cyclictest9-21ksoftirqd/012:00:250
995299455,5cyclictest9-21ksoftirqd/011:20:060
9952994525,10cyclictest9-21ksoftirqd/010:40:010
995299450,42cyclictest101ktimersoftd/012:15:160
134491450,8ptp4l33-21ksoftirqd/209:30:172
134491450,3ptp4l0-21swapper/311:36:263
134491450,3ptp4l0-21swapper/308:19:203
134491450,2ptp4l1301-21snmpd11:23:273
9954994438,3cyclictest33-21ksoftirqd/207:40:002
995399444,7cyclictest25-21ksoftirqd/109:00:201
995399441,7cyclictest25-21ksoftirqd/107:50:231
995399440,1cyclictest121rcu_preempt11:00:241
995299445,5cyclictest9-21ksoftirqd/007:25:220
995299444,6cyclictest0-21swapper/007:22:020
995299443,5cyclictest9-21ksoftirqd/009:20:140
995299442,6cyclictest0-21swapper/009:00:230
995299440,5cyclictest0-21swapper/012:35:160
134491440,9ptp4l0-21swapper/208:55:592
134491440,7ptp4l0-21swapper/208:14:092
134491440,4ptp4l1052-21apt-get09:10:112
134491440,3ptp4l0-21swapper/307:11:493
134491440,3ptp4l0-21swapper/211:51:282
134491440,10ptp4l0-21swapper/209:27:212
9954994338,3cyclictest33-21ksoftirqd/207:19:592
995299430,7cyclictest8519-21latency_hist11:45:000
134491430,5ptp4l0-21swapper/307:15:203
134491430,4ptp4l13213-21iostat09:35:150
9954994237,3cyclictest33-21ksoftirqd/210:40:002
995299422,9cyclictest0-21swapper/011:30:190
995299422,9cyclictest0-21swapper/011:30:190
995299422,6cyclictest9-21ksoftirqd/011:05:190
46198420,5rtkit-daemon0-21swapper/307:20:093
134491420,5ptp4l0-21swapper/312:35:213
134491420,4ptp4l8586-21apt-get11:45:142
134491420,4ptp4l674-21ls10:15:262
134491420,4ptp4l674-21ls10:15:262
134491420,4ptp4l17551-21apt-get12:05:022
134491420,3ptp4l16963-21ls10:50:243
134491420,3ptp4l0-21swapper/309:27:343
9954994136,3cyclictest33-21ksoftirqd/210:50:012
9954994136,3cyclictest33-21ksoftirqd/210:10:002
9954994136,3cyclictest33-21ksoftirqd/208:05:172
9954994135,3cyclictest33-21ksoftirqd/211:35:002
9954994135,3cyclictest33-21ksoftirqd/211:35:002
995399410,5cyclictest25-21ksoftirqd/107:32:441
995299416,2cyclictest9-21ksoftirqd/010:40:120
134491410,9ptp4l0-21swapper/207:23:342
134491410,5ptp4l30192-21/usr/sbin/munin10:10:223
134491410,5ptp4l30192-21/usr/sbin/munin10:10:213
134491410,5ptp4l0-21swapper/307:25:283
134491410,4ptp4l9-21ksoftirqd/007:09:540
134491410,4ptp4l23858-21apt-get07:40:132
134491410,4ptp4l21910-21apt-get09:55:122
134491410,4ptp4l0-21swapper/207:50:102
134491410,4ptp4l0-21swapper/207:49:172
134491410,3ptp4l6287-21apt-get11:40:102
134491410,3ptp4l6112-21apt-get10:30:122
9954994036,2cyclictest33-21ksoftirqd/209:50:172
9954994035,3cyclictest33-21ksoftirqd/210:50:102
9954994034,3cyclictest33-21ksoftirqd/209:50:002
995499400,2cyclictest121rcu_preempt07:32:492
995299404,6cyclictest0-21swapper/009:05:240
134491400,5ptp4l0-21swapper/312:20:233
134491400,5ptp4l0-21swapper/309:30:143
134491400,5ptp4l0-21swapper/307:45:123
134491400,5ptp4l0-21swapper/209:44:232
134491400,4ptp4l7534-21ls10:30:263
134491400,4ptp4l4932-21ntp_states10:25:213
134491400,4ptp4l0-21swapper/308:27:583
134491400,4ptp4l0-21swapper/308:05:183
134491400,4ptp4l0-21swapper/211:00:092
134491400,4ptp4l0-21swapper/208:27:482
134491400,4ptp4l0-21swapper/007:50:240
134491400,3ptp4l31853-21diskstats10:15:143
134491400,3ptp4l31853-21diskstats10:15:133
134491400,3ptp4l30743-21apt-get07:55:112
134491400,3ptp4l23077-21perl12:15:152
134491400,3ptp4l22656-21apt-get12:15:123
134491400,3ptp4l20358-21apt-get12:10:112
134491400,3ptp4l15309-21iostat08:30:160
134491400,3ptp4l14299-21ntp_states11:55:213
134491400,3ptp4l12005-21ntp_states11:50:213
134491400,3ptp4l0-21swapper/311:32:223
134491400,3ptp4l0-21swapper/311:32:213
134491400,10ptp4l0-21swapper/210:44:252
9954993934,3cyclictest33-21ksoftirqd/208:40:182
134491390,5ptp4l0-21swapper/311:40:123
134491390,5ptp4l0-21swapper/209:05:222
134491390,4ptp4l622-21apt-get08:00:112
134491390,4ptp4l0-21swapper/310:20:133
134491390,4ptp4l0-21swapper/309:51:113
134491390,4ptp4l0-21swapper/308:41:383
134491390,4ptp4l0-21swapper/307:37:263
134491390,4ptp4l0-21swapper/212:38:292
134491390,4ptp4l0-21swapper/210:55:272
134491390,4ptp4l0-21swapper/210:20:152
134491390,4ptp4l0-21swapper/208:48:592
134491390,4ptp4l0-21swapper/207:10:202
134491390,3ptp4l0-21swapper/212:03:562
134491390,3ptp4l0-21swapper/208:20:092
134491390,2ptp4l14148-21ls09:35:253
134491390,2ptp4l0-21swapper/208:30:252
134491380,4ptp4l0-21swapper/310:00:153
134491380,4ptp4l0-21swapper/211:28:242
134491380,4ptp4l0-21swapper/208:50:262
134491380,4ptp4l0-21swapper/208:15:262
134491380,4ptp4l0-21swapper/107:09:561
134491380,3ptp4l3817-21apt-get10:25:102
134491380,3ptp4l25754-21meminfo11:10:203
134491380,3ptp4l24342-21if_enp1s007:40:163
134491380,3ptp4l0-21swapper/312:26:353
134491380,3ptp4l0-21swapper/311:05:223
134491380,3ptp4l0-21swapper/308:00:213
134491380,3ptp4l0-21swapper/307:30:163
134491380,3ptp4l0-21swapper/211:15:272
134491380,2ptp4l29416-21apt-get11:20:102
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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