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2026-09-22 - 22:47
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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 Tue Sep 22, 2026 12:45:37)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
134491730,4ptp4l0-21swapper/107:09:141
31440997014,11cyclictest1317-21runrttasks09:44:330
31440996913,11cyclictest7181-21ntpq07:25:220
31440996911,16cyclictest1293-21sed07:15:010
31440996911,16cyclictest1276-21cat11:50:230
31440996811,18cyclictest1301-21snmpd11:08:020
31440996711,15cyclictest29077-21cat10:30:230
31440996514,11cyclictest18711-21taskset12:28:400
31440996513,10cyclictest1317-21runrttasks10:02:060
134491650,5ptp4l12612-21sed09:55:202
3144099648,11cyclictest32650-21latency_hist10:40:000
31440996414,10cyclictest212-21systemd-journal08:00:370
3144099639,9cyclictest13438-21date08:49:590
31440996319,40cyclictest4070-21/usr/sbin/munin11:55:250
31440996311,10cyclictest2522-21ntpq07:15:240
134491630,4ptp4l0-21swapper/208:30:242
3144099628,11cyclictest19384-21unixbench_multi07:50:280
31440996210,11cyclictest5239-21sed07:20:270
31440996210,11cyclictest0-21swapper/010:15:200
3144099618,17cyclictest31135-21switchtime08:15:260
31440996117,10cyclictest25440-21taskset11:33:370
31440996112,11cyclictest9267-21df_abs08:40:140
31440996019,37cyclictest4745-21hddtemp_smartct08:30:160
31440996014,11cyclictest1317-21runrttasks11:36:390
31440996012,11cyclictest20712-21sed07:55:200
31440996010,11cyclictest23997-21irqrtprio09:10:190
134491600,3ptp4l0-21swapper/111:56:321
3144099598,12cyclictest26125-21df_abs10:25:130
3144099596,10cyclictest0-21swapper/010:40:110
3144099592,17cyclictest0-21swapper/010:20:130
31440995917,10cyclictest28102-21taskset11:40:030
3144099589,12cyclictest10673-21missed_timers11:00:200
134491580,4ptp4l0-21swapper/312:25:073
134491580,4ptp4l0-21swapper/109:06:501
134491580,3ptp4l0-21swapper/310:08:483
31440995713,41cyclictest1356-21/usr/sbin/munin09:30:280
31440995711,11cyclictest11507-21taskset12:12:390
134491570,4ptp4l0-21swapper/211:38:252
134491570,4ptp4l0-21swapper/110:45:181
31440995618,15cyclictest27510-21seq09:19:330
31440995617,36cyclictest19235-21diskstats11:20:150
31440995617,11cyclictest26718-21taskset08:06:480
134491560,4ptp4l0-21swapper/312:32:553
134491560,4ptp4l0-21swapper/211:20:482
134491560,4ptp4l0-21swapper/209:14:482
134491560,3ptp4l0-21swapper/311:24:553
134491560,3ptp4l0-21swapper/307:50:323
134491560,13ptp4l0-21swapper/208:53:362
31440995517,11cyclictest8380-21runrttasks08:35:490
31440995512,10cyclictest1317-21runrttasks11:27:000
134491550,4ptp4l0-21swapper/312:05:493
134491550,4ptp4l0-21swapper/312:03:093
31440995417,9cyclictest15034-21seq07:44:500
31440995416,11cyclictest6833-21taskset10:51:000
31440995416,10cyclictest16305-21cat12:24:550
3144099540,9cyclictest0-21swapper/010:55:140
134491540,4ptp4l0-21swapper/309:16:073
134491540,4ptp4l0-21swapper/308:25:113
134491540,4ptp4l0-21swapper/207:23:122
95692530,4sleep00-21swapper/012:10:000
3144099539,7cyclictest20913-21apt-get09:05:110
3144099539,10cyclictest0-21swapper/010:07:520
31440995316,11cyclictest32176-21runrttasks11:46:130
31440995313,11cyclictest1317-21runrttasks12:37:160
134491530,4ptp4l0-21swapper/208:09:412
134491530,4ptp4l0-21swapper/111:48:591
134491530,4ptp4l0-21swapper/110:11:261
134491530,4ptp4l0-21swapper/108:35:351
134491530,3ptp4l0-21swapper/211:05:272
134491530,3ptp4l0-21swapper/210:13:572
134491530,3ptp4l0-21swapper/008:50:300
31440995216,8cyclictest212-21systemd-journal09:48:360
31440995215,10cyclictest16075-21taskset11:11:300
134491520,4ptp4l0-21swapper/309:22:303
134491520,4ptp4l0-21swapper/208:11:282
134491520,4ptp4l0-21swapper/007:09:190
134491520,3ptp4l0-21swapper/311:18:323
134491520,3ptp4l0-21swapper/108:49:471
134491520,13ptp4l0-21swapper/210:23:202
134491520,11ptp4l0-21swapper/109:48:081
31440995111,10cyclictest0-21swapper/010:48:360
134491510,4ptp4l0-21swapper/212:36:132
134491510,4ptp4l0-21swapper/211:04:252
134491510,4ptp4l0-21swapper/210:51:422
134491510,4ptp4l0-21swapper/208:56:262
134491510,4ptp4l0-21swapper/110:42:591
134491510,4ptp4l0-21swapper/107:53:321
134491510,4ptp4l0-21swapper/107:16:471
134491510,3ptp4l0-21swapper/107:30:471
134491510,3ptp4l0-21swapper/107:20:341
134491510,3ptp4l0-21swapper/008:25:250
134491510,2ptp4l0-21swapper/209:37:532
31440995013,8cyclictest134491ptp4l09:00:230
134491500,4ptp4l0-21swapper/210:29:032
134491500,4ptp4l0-21swapper/107:38:321
134491500,11ptp4l0-21swapper/112:20:251
31440994917,29cyclictest5566-21iostat12:00:180
31440994910,7cyclictest19494-21df12:30:130
134491490,4ptp4l0-21swapper/311:50:143
134491490,4ptp4l0-21swapper/310:03:443
134491490,4ptp4l0-21swapper/307:11:373
134491490,4ptp4l0-21swapper/212:27:412
134491490,4ptp4l0-21swapper/210:16:272
134491490,4ptp4l0-21swapper/112:05:041
134491490,4ptp4l0-21swapper/108:29:141
134491490,3ptp4l0-21swapper/308:31:483
31440994815,11cyclictest31857-21runrttasks09:26:040
134491480,4ptp4l0-21swapper/207:32:062
134491480,4ptp4l0-21swapper/112:17:511
134491480,4ptp4l0-21swapper/111:44:221
134491480,3ptp4l0-21swapper/307:49:333
134491480,3ptp4l0-21swapper/212:22:432
134491480,3ptp4l0-21swapper/211:51:262
134491480,3ptp4l0-21swapper/110:52:461
134491480,3ptp4l0-21swapper/107:48:101
134491480,15ptp4l25-21ksoftirqd/107:41:551
134491470,3ptp4l0-21swapper/211:14:402
134491470,3ptp4l0-21swapper/111:10:241
134491470,3ptp4l0-21swapper/007:48:410
134491470,12ptp4l0-21swapper/212:00:182
134491460,4ptp4l0-21swapper/110:21:281
134491460,3ptp4l0-21swapper/310:50:083
31440994510,7cyclictest12110-21ls07:35:260
134491450,5ptp4l32425-21apt-get09:30:152
134491450,4ptp4l0-21swapper/210:39:372
134491450,3ptp4l121rcu_preempt08:45:342
134491450,3ptp4l0-21swapper/212:10:162
134491450,3ptp4l0-21swapper/108:17:081
134491450,3ptp4l0-21swapper/007:31:140
134491450,11ptp4l0-21swapper/208:40:222
134491440,9ptp4l0-21swapper/208:17:422
134491440,4ptp4l0-21swapper/308:53:533
134491440,4ptp4l0-21swapper/110:32:381
134491440,4ptp4l0-21swapper/108:58:581
134491440,3ptp4l1359-21apt-get07:15:142
134491440,3ptp4l0-21swapper/309:30:183
134491430,9ptp4l0-21swapper/210:45:412
134491430,9ptp4l0-21swapper/208:35:522
134491430,5ptp4l0-21swapper/311:25:123
134491430,4ptp4l4043-21users09:35:280
134491430,4ptp4l0-21swapper/111:09:241
134491430,3ptp4l0-21swapper/308:56:043
31442994230,4cyclictest33-21ksoftirqd/211:55:202
134491420,9ptp4l0-21swapper/210:44:502
134491420,9ptp4l0-21swapper/210:07:232
134491420,5ptp4l2682-21diskstats09:35:161
134491420,5ptp4l0-21swapper/210:30:232
134491420,5ptp4l0-21swapper/207:50:012
134491420,4ptp4l9-21ksoftirqd/008:58:580
134491420,4ptp4l12848-21ls08:45:283
134491420,4ptp4l0-21swapper/311:36:363
134491420,4ptp4l0-21swapper/111:22:181
134491420,4ptp4l0-21swapper/109:26:431
134491420,4ptp4l0-21swapper/108:14:131
134491420,3ptp4l25813-21apt-get11:35:121
134491420,3ptp4l0-21swapper/110:37:471
31443994131,9cyclictest41-21ksoftirqd/312:20:183
31442994137,2cyclictest33-21ksoftirqd/208:05:002
134491410,9ptp4l0-21swapper/310:25:403
134491410,5ptp4l21267-21df10:15:153
134491410,4ptp4l28842-21ls09:20:231
134491410,4ptp4l25238-21diskstats08:05:161
134491410,4ptp4l24159-21memory09:10:221
134491410,4ptp4l17719-21ntp_states11:15:220
134491410,4ptp4l0-21swapper/209:22:382
134491410,4ptp4l0-21swapper/112:33:051
134491410,4ptp4l0-21swapper/112:12:451
134491410,4ptp4l0-21swapper/111:29:031
134491410,4ptp4l0-21swapper/110:57:081
134491410,4ptp4l0-21swapper/109:31:001
134491410,4ptp4l0-21swapper/107:25:391
134491410,3ptp4l30118-21apt-get09:25:122
134491410,3ptp4l23369-21meminfo08:00:211
134491410,3ptp4l13793-21apt-get08:50:131
134491410,3ptp4l0-21swapper/309:07:253
134491410,10ptp4l0-21swapper/107:59:371
31443994035,3cyclictest41-21ksoftirqd/311:50:003
31442994035,3cyclictest33-21ksoftirqd/211:45:542
31442994035,3cyclictest33-21ksoftirqd/207:40:112
3144099400,10cyclictest0-21swapper/010:11:250
134491400,9ptp4l0-21swapper/211:33:402
134491400,9ptp4l0-21swapper/208:20:482
134491400,6ptp4l0-21swapper/311:02:483
134491400,6ptp4l0-21swapper/310:14:073
134491400,5ptp4l18590-21apt-get09:00:041
134491400,4ptp4l9933-21/usr/sbin/munin11:00:141
134491400,4ptp4l29137-21memory10:30:253
134491400,4ptp4l20399-21ntp_states12:30:222
134491400,4ptp4l18134-21apt-get09:00:012
134491400,4ptp4l0-21swapper/312:15:243
134491400,4ptp4l0-21swapper/310:21:483
134491400,4ptp4l0-21swapper/308:15:193
134491400,4ptp4l0-21swapper/308:12:463
134491400,4ptp4l0-21swapper/209:52:562
134491400,4ptp4l0-21swapper/207:55:002
134491400,4ptp4l0-21swapper/111:32:131
134491400,4ptp4l0-21swapper/111:15:251
134491400,4ptp4l0-21swapper/109:15:291
134491400,4ptp4l0-21swapper/009:50:260
134491400,4ptp4l0-21swapper/008:20:140
134491400,4ptp4l0-21swapper/008:11:510
134491400,3ptp4l5803-21ntp_states09:40:223
134491400,3ptp4l5003-21apt-get12:00:131
134491400,3ptp4l32066-21apt-get08:20:111
134491400,3ptp4l31439-21cyclictest07:25:193
134491400,3ptp4l20103-21apt-get07:55:133
134491400,3ptp4l14167-21apt-get10:00:112
134491400,3ptp4l0-21swapper/309:45:363
134491400,3ptp4l0-21swapper/309:04:123
134491400,10ptp4l25-21ksoftirqd/112:38:471
31443993935,2cyclictest41-21ksoftirqd/312:14:263
31442993934,3cyclictest33-21ksoftirqd/211:40:122
31442993932,5cyclictest33-21ksoftirqd/208:25:142
134491390,5ptp4l0-21swapper/311:40:293
134491390,5ptp4l0-21swapper/207:05:412
134491390,5ptp4l0-21swapper/112:25:491
134491390,4ptp4l6098-21apt-get07:25:132
134491390,4ptp4l41-21ksoftirqd/307:05:123
134491390,4ptp4l26450-21iostat10:25:181
134491390,4ptp4l12454-21/usr/sbin/munin11:05:183
134491390,4ptp4l12256-21diskstats12:15:152
134491390,4ptp4l10509-21memory09:50:241
134491390,4ptp4l0-21swapper/311:55:163
134491390,4ptp4l0-21swapper/310:45:383
134491390,4ptp4l0-21swapper/212:05:112
134491390,4ptp4l0-21swapper/211:15:052
134491390,4ptp4l0-21swapper/210:55:132
134491390,4ptp4l0-21swapper/209:45:272
134491390,4ptp4l0-21swapper/209:18:332
134491390,4ptp4l0-21swapper/209:05:212
134491390,4ptp4l0-21swapper/207:35:142
134491390,4ptp4l0-21swapper/207:12:232
134491390,4ptp4l0-21swapper/110:05:081
134491390,4ptp4l0-21swapper/110:01:041
134491390,4ptp4l0-21swapper/109:40:311
134491390,4ptp4l0-21swapper/012:15:100
134491390,4ptp4l0-21swapper/009:24:430
134491390,3ptp4l595-21df_inode11:50:181
134491390,3ptp4l21432-21df11:25:142
134491390,3ptp4l13064-21ps09:55:260
134491390,3ptp4l0-21swapper/109:55:421
134491390,3ptp4l0-21swapper/107:13:581
31443993833,3cyclictest41-21ksoftirqd/307:44:373
134491380,4ptp4l0-21swapper/312:35:093
134491380,4ptp4l0-21swapper/311:13:583
134491380,4ptp4l0-21swapper/310:39:463
134491380,4ptp4l0-21swapper/309:58:583
134491380,4ptp4l0-21swapper/309:25:133
134491380,4ptp4l0-21swapper/309:13:573
134491380,4ptp4l0-21swapper/308:20:563
134491380,4ptp4l0-21swapper/308:05:203
134491380,4ptp4l0-21swapper/308:01:213
134491380,4ptp4l0-21swapper/307:17:063
134491380,4ptp4l0-21swapper/209:40:152
134491380,4ptp4l0-21swapper/207:45:172
134491380,4ptp4l0-21swapper/110:15:211
134491380,3ptp4l9831-21irqstats08:40:191
134491380,3ptp4l0-21swapper/310:55:193
134491380,3ptp4l0-21swapper/310:43:583
134491380,3ptp4l0-21swapper/308:43:053
134491370,4ptp4l0-21swapper/311:30:423
134491370,4ptp4l0-21swapper/309:54:413
134491370,4ptp4l0-21swapper/309:35:083
134491370,4ptp4l0-21swapper/108:32:331
134491370,3ptp4l0-21swapper/307:38:293
134491370,3ptp4l0-21swapper/307:20:373
134491360,3ptp4l0-21swapper/308:36:033
134491350,3ptp4l0-21swapper/307:34:303
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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