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2026-05-13 - 00:54
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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 highest latencies:
System rackdslot1.osadl.org (updated Tue May 12, 2026 12:45:39)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
134491720,10ptp4l16691-21meminfo07:05:210
167472680,7sleep30-21swapper/307:05:223
18235996531,6cyclictest9-21ksoftirqd/010:40:010
18235996329,5cyclictest9-21ksoftirqd/007:55:140
18235996328,5cyclictest9-21ksoftirqd/009:45:000
134491630,5ptp4l0-21swapper/111:20:191
18235996227,5cyclictest9-21ksoftirqd/008:40:270
134491620,5ptp4l0-21swapper/011:40:270
18235996122,9cyclictest9-21ksoftirqd/012:35:000
134491610,4ptp4l0-21swapper/208:40:242
134491610,19ptp4l30282-21/usr/sbin/munin11:05:293
18235996031,4cyclictest9-21ksoftirqd/009:25:190
18235996031,4cyclictest9-21ksoftirqd/009:25:190
18235996028,5cyclictest9-21ksoftirqd/008:50:140
18235996027,4cyclictest9-21ksoftirqd/008:36:560
18235996027,3cyclictest9-21ksoftirqd/009:09:290
134491600,4ptp4l0-21swapper/210:12:372
18235995931,5cyclictest9-21ksoftirqd/009:49:590
18235995926,8cyclictest9-21ksoftirqd/012:05:220
18235995926,3cyclictest9-21ksoftirqd/012:35:080
18235995922,5cyclictest9-21ksoftirqd/011:05:010
22472580,2sleep12250-21cstates07:45:151
18235995828,5cyclictest9-21ksoftirqd/012:15:020
134491580,4ptp4l0-21swapper/210:00:142
134491580,4ptp4l0-21swapper/112:25:201
230312570,5sleep123035-21sendmail09:40:011
1823599575,8cyclictest9-21ksoftirqd/012:25:120
18235995723,6cyclictest9-21ksoftirqd/007:50:000
18235995721,6cyclictest9-21ksoftirqd/011:36:370
134491570,4ptp4l0-21swapper/108:55:281
1823599566,9cyclictest23007-21sort09:40:010
18235995625,2cyclictest9-21ksoftirqd/008:49:010
134491560,4ptp4l0-21swapper/311:50:303
134491560,3ptp4l18165-21apt-get09:30:031
134491560,3ptp4l0-21swapper/010:50:290
18235995528,3cyclictest9-21ksoftirqd/007:43:530
18235995526,2cyclictest9-21ksoftirqd/008:07:020
134491550,4ptp4l0-21swapper/112:13:171
134491550,4ptp4l0-21swapper/107:30:321
134491550,3ptp4l0-21swapper/308:55:233
1823599548,6cyclictest27289-21ls07:30:000
18235995424,3cyclictest9-21ksoftirqd/010:59:530
134491540,4ptp4l0-21swapper/210:07:142
134491540,4ptp4l0-21swapper/011:30:270
134491540,3ptp4l0-21swapper/010:45:260
1823599535,5cyclictest9-21ksoftirqd/009:20:190
1823599535,5cyclictest9-21ksoftirqd/007:35:010
1823599533,9cyclictest9-21ksoftirqd/010:40:170
18235995330,3cyclictest9-21ksoftirqd/011:13:530
18235995326,6cyclictest9-21ksoftirqd/011:21:050
134491530,4ptp4l0-21swapper/308:28:533
134491530,4ptp4l0-21swapper/210:25:202
134491530,4ptp4l0-21swapper/107:10:121
18235995227,3cyclictest9-21ksoftirqd/008:11:490
18235995227,3cyclictest9-21ksoftirqd/008:03:540
18235995227,3cyclictest9-21ksoftirqd/008:03:540
18235995224,6cyclictest9-21ksoftirqd/012:00:530
1823599520,6cyclictest9-21ksoftirqd/011:50:160
134491520,4ptp4l0-21swapper/109:01:091
134491520,4ptp4l0-21swapper/108:02:311
134491520,4ptp4l0-21swapper/108:02:311
134491520,3ptp4l0-21swapper/310:15:353
134491520,3ptp4l0-21swapper/211:00:182
134491520,3ptp4l0-21swapper/108:47:241
1823599513,8cyclictest9-21ksoftirqd/009:15:190
1823599512,6cyclictest9-21ksoftirqd/011:49:590
1823599512,6cyclictest9-21ksoftirqd/010:15:280
18235995123,5cyclictest9-21ksoftirqd/007:35:310
18235995123,2cyclictest9-21ksoftirqd/008:34:390
18235995122,3cyclictest9-21ksoftirqd/008:59:520
134491510,3ptp4l0-21swapper/310:04:403
134491510,3ptp4l0-21swapper/308:15:183
134491510,12ptp4l0-21swapper/307:20:223
134491510,11ptp4l16644-21/usr/sbin/munin07:05:201
1823599504,5cyclictest9-21ksoftirqd/010:30:010
18235995023,7cyclictest9-21ksoftirqd/012:20:150
18235995023,3cyclictest9-21ksoftirqd/007:17:580
1823599500,6cyclictest9-21ksoftirqd/011:25:190
1823599500,5cyclictest9-21ksoftirqd/010:10:160
134491500,4ptp4l0-21swapper/209:55:182
134491500,4ptp4l0-21swapper/209:55:182
134491500,4ptp4l0-21swapper/111:29:521
134491500,4ptp4l0-21swapper/111:17:571
134491500,3ptp4l0-21swapper/212:14:432
134491500,3ptp4l0-21swapper/109:06:521
134491500,3ptp4l0-21swapper/108:33:221
134491500,12ptp4l17795-21apt-get07:10:010
1823599494,5cyclictest9-21ksoftirqd/009:55:280
1823599494,5cyclictest9-21ksoftirqd/009:55:280
1823599493,8cyclictest9-21ksoftirqd/007:50:200
1823599492,8cyclictest9-21ksoftirqd/010:05:000
134491490,4ptp4l0-21swapper/307:45:453
134491490,4ptp4l0-21swapper/112:04:371
134491490,4ptp4l0-21swapper/111:50:121
134491490,4ptp4l0-21swapper/111:41:281
134491490,4ptp4l0-21swapper/107:43:201
134491490,3ptp4l0-21swapper/309:45:193
134491490,3ptp4l0-21swapper/212:30:492
134491490,3ptp4l0-21swapper/110:13:581
1823599484,5cyclictest9-21ksoftirqd/011:15:290
1823599484,5cyclictest9-21ksoftirqd/009:10:150
1823599484,5cyclictest9-21ksoftirqd/009:00:200
1823599483,8cyclictest9-21ksoftirqd/010:30:140
1823599482,7cyclictest9-21ksoftirqd/010:05:190
1823599482,7cyclictest9-21ksoftirqd/008:20:000
18235994826,3cyclictest9-21ksoftirqd/007:24:300
18235994820,5cyclictest9-21ksoftirqd/008:20:180
134491480,4ptp4l1622-21timedrift11:10:271
134491480,18ptp4l0-21swapper/307:29:093
1823599473,5cyclictest9-21ksoftirqd/008:25:250
1823599472,3cyclictest0-21swapper/011:55:290
1823599472,11cyclictest9-21ksoftirqd/010:20:260
134491470,4ptp4l0-21swapper/310:11:273
134491470,4ptp4l0-21swapper/208:56:472
134491470,4ptp4l0-21swapper/110:41:071
134491470,4ptp4l0-21swapper/108:19:311
134491470,4ptp4l0-21swapper/108:11:011
134491470,3ptp4l0-21swapper/311:40:413
134491470,3ptp4l0-21swapper/211:26:592
134491470,3ptp4l0-21swapper/107:35:361
134491470,13ptp4l0-21swapper/210:20:112
18239994640,4cyclictest33-21ksoftirqd/211:20:002
1823599464,3cyclictest9-21ksoftirqd/009:54:590
1823599463,9cyclictest9-21ksoftirqd/009:30:150
1823599463,5cyclictest9-21ksoftirqd/011:05:150
134491460,9ptp4l41-21ksoftirqd/312:20:153
134491460,4ptp4l0-21swapper/310:43:493
134491460,4ptp4l0-21swapper/111:49:141
134491460,3ptp4l0-21swapper/112:08:261
18239994528,4cyclictest33-21ksoftirqd/209:31:592
1823999452,41cyclictest77850irq/145-enp4s0-09:52:242
1823599452,9cyclictest9-21ksoftirqd/012:20:000
134491450,4ptp4l0-21swapper/208:30:142
134491450,4ptp4l0-21swapper/109:40:151
134491450,4ptp4l0-21swapper/108:54:181
134491450,3ptp4l0-21swapper/208:27:372
134491450,3ptp4l0-21swapper/109:56:381
134491450,3ptp4l0-21swapper/109:56:381
134491440,3ptp4l0-21swapper/210:30:222
1823799433,3cyclictest255542cpu09:45:131
134491430,9ptp4l0-21swapper/212:23:282
134491430,9ptp4l0-21swapper/210:39:082
134491430,8ptp4l321ktimersoftd/211:07:542
134491430,8ptp4l0-21swapper/208:23:122
134491430,4ptp4l29782-21apt-get08:45:112
134491430,3ptp4l0-21swapper/311:33:563
134491430,3ptp4l0-21swapper/109:15:101
134491430,3ptp4l0-21swapper/107:50:471
134491430,10ptp4l0-21swapper/209:25:452
134491430,10ptp4l0-21swapper/209:25:452
134491420,8ptp4l0-21swapper/207:55:082
134491420,4ptp4l24411-21ls10:50:213
134491420,3ptp4l0-21swapper/211:12:382
134491420,12ptp4l0-21swapper/108:22:131
18239994136,3cyclictest33-21ksoftirqd/209:44:592
134491410,9ptp4l0-21swapper/212:18:332
134491410,9ptp4l0-21swapper/212:02:002
134491410,9ptp4l0-21swapper/207:39:192
134491410,5ptp4l27515-21/usr/sbin/munin07:30:263
134491410,5ptp4l0-21swapper/310:30:123
134491410,5ptp4l0-21swapper/108:05:151
134491410,4ptp4l8998-21apt-get09:10:131
134491410,4ptp4l19395-21ntp_states08:20:213
134491410,4ptp4l14945-21ntp_states09:20:231
134491410,4ptp4l12626-21ntp_states09:15:223
134491410,4ptp4l0-21swapper/107:55:451
134491410,3ptp4l25681-21apt-get10:55:132
134491410,3ptp4l15328-21ls09:20:292
134491410,3ptp4l0-21swapper/310:38:243
18239994036,2cyclictest33-21ksoftirqd/208:09:592
18239994035,3cyclictest33-21ksoftirqd/208:10:182
18239994034,3cyclictest33-21ksoftirqd/207:50:292
18237994035,3cyclictest25-21ksoftirqd/110:40:001
134491400,6ptp4l0-21swapper/110:05:131
134491400,5ptp4l23685-21df_abs10:50:152
134491400,5ptp4l0-21swapper/309:35:173
134491400,5ptp4l0-21swapper/110:29:561
134491400,4ptp4l7148-21apt-get12:35:122
134491400,4ptp4l31245-21meminfo11:05:211
134491400,4ptp4l20728-21/usr/sbin/munin07:15:131
134491400,4ptp4l12477-21ntp_states08:05:233
134491400,4ptp4l0-21swapper/310:45:113
134491400,4ptp4l0-21swapper/309:55:213
134491400,4ptp4l0-21swapper/309:55:213
134491400,4ptp4l0-21swapper/309:06:343
134491400,4ptp4l0-21swapper/209:45:032
134491400,4ptp4l0-21swapper/209:15:212
134491400,4ptp4l0-21swapper/209:06:332
134491400,4ptp4l0-21swapper/208:17:082
134491400,4ptp4l0-21swapper/208:00:352
134491400,4ptp4l0-21swapper/208:00:352
134491400,4ptp4l0-21swapper/111:33:411
134491400,3ptp4l7052-21apt-get10:15:132
134491400,3ptp4l32542-21apt-get12:20:121
134491400,3ptp4l26587-21ls08:35:251
134491400,3ptp4l25235-21apt-get07:25:142
134491400,3ptp4l20628-21apt-get10:45:042
18239993934,3cyclictest33-21ksoftirqd/207:25:002
18239993933,4cyclictest33-21ksoftirqd/207:45:322
134491390,5ptp4l21629-21/usr/sbin/munin08:25:221
134491390,5ptp4l0-21swapper/311:15:133
134491390,5ptp4l0-21swapper/209:35:562
134491390,5ptp4l0-21swapper/111:57:361
134491390,4ptp4l28737-21ps07:30:262
134491390,4ptp4l0-21swapper/312:30:123
134491390,4ptp4l0-21swapper/312:15:163
134491390,4ptp4l0-21swapper/311:20:153
134491390,4ptp4l0-21swapper/311:00:183
134491390,4ptp4l0-21swapper/310:25:163
134491390,4ptp4l0-21swapper/309:13:363
134491390,4ptp4l0-21swapper/308:40:113
134491390,4ptp4l0-21swapper/308:34:413
134491390,4ptp4l0-21swapper/212:26:172
134491390,4ptp4l0-21swapper/211:56:322
134491390,4ptp4l0-21swapper/211:54:032
134491390,4ptp4l0-21swapper/211:47:062
134491390,4ptp4l0-21swapper/211:33:232
134491390,4ptp4l0-21swapper/211:24:002
134491390,4ptp4l0-21swapper/210:40:042
134491390,4ptp4l0-21swapper/209:02:202
134491390,4ptp4l0-21swapper/208:50:362
134491390,4ptp4l0-21swapper/207:41:112
134491390,4ptp4l0-21swapper/207:12:352
134491390,4ptp4l0-21swapper/111:02:351
134491390,4ptp4l0-21swapper/110:45:241
134491390,4ptp4l0-21swapper/109:54:571
134491390,4ptp4l0-21swapper/109:25:191
134491390,4ptp4l0-21swapper/109:25:181
134491390,4ptp4l0-21swapper/108:43:561
134491390,4ptp4l0-21swapper/107:27:041
134491390,3ptp4l26631-21meminfo10:55:201
134491390,3ptp4l23363-21hddtemp_smartct07:20:171
134491390,3ptp4l14700-21iostat_ios11:40:182
134491390,3ptp4l0-21swapper/309:50:273
134491390,3ptp4l0-21swapper/308:50:223
134491390,3ptp4l0-21swapper/110:30:191
134491380,4ptp4l0-21swapper/312:37:253
134491380,4ptp4l0-21swapper/312:27:213
134491380,4ptp4l0-21swapper/311:56:093
134491380,4ptp4l0-21swapper/311:45:163
134491380,4ptp4l0-21swapper/311:10:233
134491380,4ptp4l0-21swapper/310:59:203
134491380,4ptp4l0-21swapper/310:20:133
134491380,4ptp4l0-21swapper/310:05:193
134491380,4ptp4l0-21swapper/309:20:333
134491380,4ptp4l0-21swapper/309:00:263
134491380,4ptp4l0-21swapper/308:35:093
134491380,4ptp4l0-21swapper/308:10:193
134491380,4ptp4l0-21swapper/212:07:022
134491380,4ptp4l0-21swapper/211:35:142
134491380,4ptp4l0-21swapper/208:35:272
134491380,4ptp4l0-21swapper/207:15:022
134491380,4ptp4l0-21swapper/112:33:561
134491380,4ptp4l0-21swapper/112:18:351
134491380,4ptp4l0-21swapper/111:35:091
134491380,4ptp4l0-21swapper/110:53:411
134491380,4ptp4l0-21swapper/110:00:231
134491380,3ptp4l0-21swapper/308:00:283
134491380,3ptp4l0-21swapper/308:00:283
134491380,3ptp4l0-21swapper/307:50:253
134491380,3ptp4l0-21swapper/209:12:392
134491370,5ptp4l0-21swapper/309:30:053
134491370,4ptp4l0-21swapper/311:35:343
134491370,4ptp4l0-21swapper/309:25:323
134491370,4ptp4l0-21swapper/309:25:323
134491370,4ptp4l0-21swapper/308:45:153
134491370,4ptp4l0-21swapper/307:55:353
134491370,4ptp4l0-21swapper/110:22:581
134491370,4ptp4l0-21swapper/110:15:171
134491370,3ptp4l212-21systemd-journal09:42:373
134491370,3ptp4l1301-21snmpd07:11:533
134491370,3ptp4l0-21swapper/312:10:183
134491370,3ptp4l0-21swapper/112:35:221
18240993630,4cyclictest41-21ksoftirqd/307:18:373
134491360,4ptp4l0-21swapper/312:05:383
134491360,4ptp4l0-21swapper/312:00:363
134491350,4ptp4l0-21swapper/311:26:593
134491330,3ptp4l0-21swapper/307:38:093
18240992823,3cyclictest41-21ksoftirqd/307:40:203
137891222,3phc2sys0-21swapper/207:09:232
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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