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2026-08-26 - 22:17
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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 Wed Aug 26, 2026 12:45:39)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1448621760,5sleep12441899cyclictest12:35:171
24419997213,11cyclictest3619-21taskset08:44:062
2441999707,61cyclictest0-21swapper/211:10:142
24419996914,12cyclictest12591-21chrt09:01:102
24419996913,11cyclictest29255-21chrt11:56:352
24419996911,11cyclictest172742chrt09:12:222
134491690,4ptp4l2143-21/usr/sbin/munin08:40:171
24419996712,11cyclictest28678-21chrt07:17:442
24419996712,11cyclictest10711-21chrt10:09:352
24419996618,12cyclictest1043-21chrt07:28:392
24419996614,11cyclictest1761-21seq12:06:512
24419996613,10cyclictest30895-21taskset07:20:452
24419996518,12cyclictest1473-21cron09:50:002
24419996513,11cyclictest13131-21seq11:21:182
2441999647,12cyclictest4905-21missed_timers08:45:202
2441999645,16cyclictest0-21swapper/207:10:172
24419996413,9cyclictest27006-21taskset11:52:132
24419996413,11cyclictest13449-21taskset12:30:402
24419996412,10cyclictest31283-21chrt09:41:142
2441999638,10cyclictest443-21rs:main2
24419996317,10cyclictest8008-21chrt08:51:312
24419996311,48cyclictest20599-21if_err_enp4s009:20:172
24419996311,17cyclictest29637-21/usr/sbin/munin08:30:142
24419996217,11cyclictest12752-21chrt07:52:382
24419996210,49cyclictest14762-21awk09:05:282
2441999618,17cyclictest16097-21sed08:00:172
175542610,5sleep20-21swapper/211:30:272
134491610,4ptp4l1567-21cat11:00:010
24419996017,10cyclictest4066-21taskset12:11:132
24419996016,11cyclictest6057-21taskset11:06:592
24419996010,48cyclictest0-21swapper/209:25:292
134491600,3ptp4l21156-21ntpq09:20:220
2441999598,10cyclictest1708-21sed07:30:142
2441999588,12cyclictest17913-21grep08:05:122
134491580,4ptp4l0-21swapper/209:54:082
134491580,4ptp4l0-21swapper/209:16:122
134491580,4ptp4l0-21swapper/109:41:131
2441999579,6cyclictest134491ptp4l12:25:172
24419995712,11cyclictest6858-21chrt12:19:442
24419995711,14cyclictest448-21dbus-daemon08:20:232
134491570,4ptp4l0-21swapper/009:15:260
134491570,3ptp4l0-21swapper/110:07:211
134491570,3ptp4l0-21swapper/011:30:140
24419995610,43cyclictest24352-21chrt08:18:452
134491560,3ptp4l0-21swapper/312:20:273
134491560,3ptp4l0-21swapper/007:58:100
134491560,15ptp4l0-21swapper/309:40:143
2441999559,9cyclictest0-21swapper/210:25:192
2441999557,11cyclictest28351-21cat09:35:262
134491550,5ptp4l0-21swapper/011:42:200
134491550,4ptp4l0-21swapper/008:30:200
134491540,4ptp4l0-21swapper/011:05:140
134491540,4ptp4l0-21swapper/009:36:160
134491540,3ptp4l0-21swapper/111:14:191
2441999533,47cyclictest24639-21/usr/sbin/munin09:30:212
24419995316,11cyclictest24920-21chrt11:49:492
24419995314,12cyclictest21153-21awk11:40:182
134491530,4ptp4l0-21swapper/011:01:180
134491530,3ptp4l0-21swapper/308:55:573
134491530,3ptp4l0-21swapper/107:09:381
134491530,3ptp4l0-21swapper/010:41:040
24419995216,11cyclictest21882-21taskset08:11:402
134491520,4ptp4l0-21swapper/311:09:083
134491520,4ptp4l0-21swapper/007:12:130
134491520,3ptp4l0-21swapper/009:46:260
134491510,4ptp4l0-21swapper/110:14:211
134491510,4ptp4l0-21swapper/009:59:300
134491510,4ptp4l0-21swapper/009:12:010
134491510,4ptp4l0-21swapper/007:43:150
134491510,3ptp4l0-21swapper/008:48:260
134491510,3ptp4l0-21swapper/007:18:080
134491510,2ptp4l0-21swapper/012:38:200
24419995015,10cyclictest26996-21taskset08:25:002
134491500,4ptp4l0-21swapper/308:33:493
134491500,4ptp4l0-21swapper/110:35:051
134491500,4ptp4l0-21swapper/108:24:191
134491500,18ptp4l9-21ksoftirqd/012:28:090
24419994914,11cyclictest5960-21chrt09:57:552
24419994910,7cyclictest14047-21apt-get12:35:112
134491490,8ptp4l22154-21df07:05:150
134491490,4ptp4l0-21swapper/312:30:403
134491490,4ptp4l0-21swapper/309:57:233
134491490,4ptp4l0-21swapper/107:50:131
134491490,3ptp4l0-21swapper/108:38:061
134491490,18ptp4l9-21ksoftirqd/008:23:390
24419994815,11cyclictest17481-21chrt10:22:512
24419994811,13cyclictest10497-21ssh11:15:272
2441999481,10cyclictest0-21swapper/212:21:202
24419994810,7cyclictest7247-21ls07:40:202
24417994825,3cyclictest9-21ksoftirqd/011:25:100
134491480,4ptp4l0-21swapper/312:09:573
134491480,4ptp4l0-21swapper/108:28:201
134491480,4ptp4l0-21swapper/007:50:580
134491480,2ptp4l0-21swapper/007:22:490
134491470,4ptp4l0-21swapper/111:20:371
207672463,9sleep341-21ksoftirqd/310:30:183
134491460,3ptp4l0-21swapper/310:51:273
134491460,3ptp4l0-21swapper/309:45:223
134491460,11ptp4l0-21swapper/012:23:100
134491450,4ptp4l13196-21apt-get07:55:122
134491450,3ptp4l0-21swapper/012:16:310
134491450,3ptp4l0-21swapper/007:35:580
134491450,11ptp4l0-21swapper/012:11:030
134491450,11ptp4l0-21swapper/009:53:590
24420994438,3cyclictest41-21ksoftirqd/307:45:003
134491440,9ptp4l0-21swapper/211:28:292
134491440,4ptp4l13680-21apt-get11:25:103
134491440,11ptp4l0-21swapper/010:05:070
134491440,10ptp4l0-21swapper/012:01:020
134491440,10ptp4l0-21swapper/012:01:020
2441999439,9cyclictest0-21swapper/210:12:412
134491430,9ptp4l9-21ksoftirqd/010:17:460
134491430,9ptp4l0-21swapper/011:48:250
134491430,9ptp4l0-21swapper/011:36:270
134491430,9ptp4l0-21swapper/011:13:500
134491430,5ptp4l0-21swapper/310:55:113
134491430,4ptp4l0-21swapper/311:30:233
134491430,4ptp4l0-21swapper/010:33:480
134491430,3ptp4l0-21swapper/310:28:133
134491430,3ptp4l0-21swapper/112:23:351
134491430,3ptp4l0-21swapper/108:58:121
134491430,3ptp4l0-21swapper/107:16:281
24419994214,11cyclictest31775-21taskset12:00:452
24419994214,11cyclictest31775-21taskset12:00:452
134491420,9ptp4l0-21swapper/011:56:500
134491420,9ptp4l0-21swapper/010:50:320
134491420,9ptp4l0-21swapper/009:27:120
134491420,6ptp4l0-21swapper/207:05:512
134491420,6ptp4l0-21swapper/007:49:320
134491420,5ptp4l332-21hddtemp_smartct12:05:160
134491420,5ptp4l29021-21apt-get09:40:060
134491420,5ptp4l0-21swapper/110:00:131
134491420,5ptp4l0-21swapper/107:45:191
134491420,5ptp4l0-21swapper/012:30:180
134491420,4ptp4l9448-21apt-get12:25:113
134491420,4ptp4l9062-21apt-get11:15:113
134491420,4ptp4l29561-21hddtemp_smartct07:20:161
134491420,4ptp4l18758-21meminfo08:05:201
134491420,4ptp4l15615-21apt-get10:20:111
134491420,3ptp4l0-21swapper/008:59:080
134491410,5ptp4l10735-21users11:15:271
134491410,5ptp4l0-21swapper/311:35:153
134491410,5ptp4l0-21swapper/307:07:203
134491410,4ptp4l497-21iostat_ios12:05:191
134491410,4ptp4l27973-21meminfo08:25:190
134491410,4ptp4l20537-21hddtemp_smartct08:10:170
134491410,4ptp4l16046-21hddtemp_smartct10:20:160
134491410,4ptp4l0-21swapper/311:50:213
134491410,4ptp4l0-21swapper/108:18:461
134491410,4ptp4l0-21swapper/008:18:350
134491410,4ptp4l0-21swapper/007:32:080
134491410,3ptp4l15444-21apt-get09:10:121
134491410,2ptp4l0-21swapper/312:00:173
134491410,2ptp4l0-21swapper/312:00:173
134491410,10ptp4l0-21swapper/111:29:361
24420994034,3cyclictest41-21ksoftirqd/309:40:003
24418994035,3cyclictest25-21ksoftirqd/111:05:001
134491400,5ptp4l0-21swapper/307:20:123
134491400,5ptp4l0-21swapper/307:10:123
134491400,5ptp4l0-21swapper/109:25:181
134491400,4ptp4l31773-21apt-get10:55:132
134491400,4ptp4l25776-21memory10:40:191
134491400,4ptp4l18584-21irqstats09:15:191
134491400,4ptp4l13761-21iostat07:55:181
134491400,4ptp4l12400-21ls11:20:213
134491400,4ptp4l0-21swapper/309:29:283
134491400,4ptp4l0-21swapper/307:26:273
134491400,4ptp4l0-21swapper/210:39:372
134491400,4ptp4l0-21swapper/208:57:202
134491400,4ptp4l0-21swapper/109:30:201
134491400,4ptp4l0-21swapper/107:40:021
134491400,4ptp4l0-21swapper/107:10:021
134491400,4ptp4l0-21swapper/011:50:030
134491400,4ptp4l0-21swapper/008:40:200
134491400,4ptp4l0-21swapper/008:36:280
134491400,4ptp4l0-21swapper/008:03:580
134491400,3ptp4l4256-21apt-get11:05:121
134491400,3ptp4l13719-21iostat09:05:180
134491400,2ptp4l6254-21ls12:15:271
24420993934,3cyclictest41-21ksoftirqd/310:19:593
24420993934,3cyclictest41-21ksoftirqd/307:20:003
2441999394,31cyclictest0-21swapper/210:30:132
134491390,5ptp4l2441799cyclictest10:25:270
134491390,5ptp4l0-21swapper/312:35:203
134491390,5ptp4l0-21swapper/310:09:553
134491390,5ptp4l0-21swapper/307:30:123
134491390,5ptp4l0-21swapper/210:40:272
134491390,5ptp4l0-21swapper/110:15:221
134491390,5ptp4l0-21swapper/008:50:170
134491390,4ptp4l0-21swapper/310:45:273
134491390,4ptp4l0-21swapper/310:40:193
134491390,4ptp4l0-21swapper/310:00:193
134491390,4ptp4l0-21swapper/309:30:183
134491390,4ptp4l0-21swapper/308:40:233
134491390,4ptp4l0-21swapper/308:35:173
134491390,4ptp4l0-21swapper/211:05:012
134491390,4ptp4l0-21swapper/210:00:162
134491390,4ptp4l0-21swapper/208:37:112
134491390,4ptp4l0-21swapper/207:45:182
134491390,4ptp4l0-21swapper/112:30:141
134491390,4ptp4l0-21swapper/112:28:351
134491390,4ptp4l0-21swapper/112:00:101
134491390,4ptp4l0-21swapper/112:00:101
134491390,4ptp4l0-21swapper/111:57:411
134491390,4ptp4l0-21swapper/111:54:081
134491390,4ptp4l0-21swapper/111:35:351
134491390,4ptp4l0-21swapper/110:58:491
134491390,4ptp4l0-21swapper/109:23:031
134491390,4ptp4l0-21swapper/107:33:401
134491390,4ptp4l0-21swapper/011:21:550
134491390,4ptp4l0-21swapper/011:19:430
134491390,4ptp4l0-21swapper/010:46:360
134491390,4ptp4l0-21swapper/009:31:320
134491390,4ptp4l0-21swapper/007:26:420
134491390,3ptp4l12111-21ntp_states10:10:220
134491390,3ptp4l11284-21hddtemp_smartct09:00:150
134491390,3ptp4l0-21swapper/310:21:023
134491390,3ptp4l0-21swapper/210:50:192
134491390,3ptp4l0-21swapper/109:36:571
24418993833,3cyclictest25-21ksoftirqd/108:30:181
134491380,5ptp4l0-21swapper/110:30:111
134491380,4ptp4l16406-21taskset11:30:141
134491380,4ptp4l0-21swapper/312:18:193
134491380,4ptp4l0-21swapper/312:11:053
134491380,4ptp4l0-21swapper/311:56:023
134491380,4ptp4l0-21swapper/311:45:153
134491380,4ptp4l0-21swapper/311:40:083
134491380,4ptp4l0-21swapper/311:01:313
134491380,4ptp4l0-21swapper/310:35:013
134491380,4ptp4l0-21swapper/309:50:133
134491380,4ptp4l0-21swapper/309:22:463
134491380,4ptp4l0-21swapper/308:50:203
134491380,4ptp4l0-21swapper/308:27:023
134491380,4ptp4l0-21swapper/308:17:353
134491380,4ptp4l0-21swapper/211:38:542
134491380,4ptp4l0-21swapper/210:46:512
134491380,4ptp4l0-21swapper/210:15:142
134491380,4ptp4l0-21swapper/112:10:181
134491380,4ptp4l0-21swapper/111:45:121
134491380,4ptp4l0-21swapper/110:45:401
134491380,4ptp4l0-21swapper/109:56:211
134491380,4ptp4l0-21swapper/109:50:211
134491380,4ptp4l0-21swapper/109:05:181
134491380,4ptp4l0-21swapper/109:01:541
134491380,4ptp4l0-21swapper/108:50:241
134491380,4ptp4l0-21swapper/108:45:141
134491380,4ptp4l0-21swapper/108:00:141
134491380,4ptp4l0-21swapper/107:36:261
134491380,4ptp4l0-21swapper/107:28:511
134491380,4ptp4l0-21swapper/010:00:220
134491380,4ptp4l0-21swapper/008:05:210
134491380,3ptp4l16450-21ls08:00:193
134491380,3ptp4l0-21swapper/309:15:223
134491380,3ptp4l0-21swapper/307:35:203
134491380,3ptp4l0-21swapper/109:46:541
134491380,3ptp4l0-21swapper/108:10:211
134491380,3ptp4l0-21swapper/010:38:070
134491370,4ptp4l8062-21grep11:10:273
134491370,4ptp4l0-21swapper/310:13:403
134491370,4ptp4l0-21swapper/111:40:131
134491370,4ptp4l0-21swapper/110:27:421
134491370,3ptp4l0-21swapper/308:45:283
134491370,3ptp4l0-21swapper/308:21:013
134491370,3ptp4l0-21swapper/308:10:263
134491370,3ptp4l0-21swapper/308:06:543
134491370,3ptp4l0-21swapper/110:51:251
24420993631,3cyclictest41-21ksoftirqd/309:00:183
134491360,4ptp4l0-21swapper/307:53:363
134491360,3ptp4l0-21swapper/309:10:153
134491360,3ptp4l0-21swapper/307:55:143
134491350,4ptp4l2442099cyclictest07:49:183
134491340,3ptp4l0-21swapper/309:09:043
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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