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2026-05-22 - 07:36
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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 May 22, 2026 00:45:40)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1925921510,7sleep02814599cyclictest21:10:040
1297521370,6sleep22814799cyclictest19:45:212
2814899732,29cyclictest0-21swapper/323:00:183
134491700,6ptp4l33-21ksoftirqd/221:26:092
134491700,4ptp4l1301-21snmpd19:40:062
134491690,30ptp4l17900-21sh21:05:242
28146996813,12cyclictest32691-21chrt22:46:011
2814699677,58cyclictest0-21swapper/119:45:251
28146996713,11cyclictest23897-21chrt23:36:441
134491660,4ptp4l26646-21date23:45:010
2814699659,16cyclictest0-21swapper/123:55:161
28146996513,12cyclictest4612-21chrt20:35:511
28146996513,11cyclictest26176-21taskset21:25:091
28146996413,12cyclictest25689-21taskset22:32:331
28146996413,11cyclictest21105-21taskset22:22:381
28146996413,10cyclictest21110-21chrt21:12:131
28146996413,10cyclictest13944-21taskset20:57:231
28146996314,10cyclictest5335-21taskset21:50:051
28146996313,11cyclictest19058-21chrt23:26:171
28146996313,11cyclictest18517-21taskset19:55:431
28146996213,11cyclictest27933-21chrt20:18:141
28146996213,11cyclictest14286-21chrt22:09:381
134491620,4ptp4l24291-21iostat20:10:160
134491610,9ptp4l0-21swapper/319:05:243
134491610,5ptp4l0-21swapper/219:09:252
2814699601,57cyclictest21025-21kworker/1:020:23:091
2814699597,15cyclictest9181-21timerwakeupswit21:55:301
28146995914,11cyclictest2717-21chrt22:51:551
28146995914,10cyclictest16212-21chrt19:53:581
143432590,2sleep314336-21awk22:10:013
134491590,5ptp4l25-21ksoftirqd/123:22:331
134491590,4ptp4l0-21swapper/222:28:572
134491590,3ptp4l0-21swapper/000:05:290
2814899585,9cyclictest13408-21grep20:55:243
28148995827,8cyclictest41-21ksoftirqd/322:50:243
2814899582,23cyclictest0-21swapper/321:35:203
28146995814,9cyclictest19729-21chrt00:38:231
28146995810,15cyclictest11711-21latency_hist19:45:001
272992580,7sleep02814599cyclictest23:45:180
134491580,4ptp4l0-21swapper/020:56:440
134491580,3ptp4l0-21swapper/322:25:293
134491580,3ptp4l0-21swapper/021:25:380
2814699579,17cyclictest14901-21cat21:00:171
134491570,4ptp4l0-21swapper/320:43:443
134491570,4ptp4l0-21swapper/023:50:170
134491570,3ptp4l0-21swapper/223:59:352
134491570,3ptp4l0-21swapper/220:44:392
134491570,3ptp4l0-21swapper/021:15:170
28146995614,38cyclictest32375-21seq20:26:031
134491560,4ptp4l0-21swapper/122:10:201
134491560,4ptp4l0-21swapper/021:34:190
134491560,3ptp4l0-21swapper/323:17:263
134491560,3ptp4l0-21swapper/020:50:140
2814699558,10cyclictest0-21swapper/119:15:581
28146995513,9cyclictest12825-21taskset00:23:101
134491550,4ptp4l0-21swapper/200:14:062
134491550,4ptp4l0-21swapper/020:20:380
134491550,4ptp4l0-21swapper/000:36:410
134491550,3ptp4l0-21swapper/000:00:140
2814899544,9cyclictest41-21ksoftirqd/319:30:273
2814699543,49cyclictest7476-21kworker/1:100:00:481
28146995410,11cyclictest4829-21cat00:05:221
134491540,4ptp4l0-21swapper/219:18:432
134491540,4ptp4l0-21swapper/021:22:200
134491540,4ptp4l0-21swapper/019:30:550
2814699536,5cyclictest0-21swapper/120:06:411
2814699532,49cyclictest20803-21kworker/1:119:29:091
134491530,4ptp4l0-21swapper/021:52:240
134491530,4ptp4l0-21swapper/020:03:320
134491530,11ptp4l25809-21apt-get19:05:120
2814899526,6cyclictest41-21ksoftirqd/322:45:273
2814899523,6cyclictest41-21ksoftirqd/323:45:233
28148995227,9cyclictest41-21ksoftirqd/322:35:183
2814899522,10cyclictest0-21swapper/323:25:263
2814899520,6cyclictest41-21ksoftirqd/320:10:153
28146995216,10cyclictest28672-21seq23:48:391
28146995215,12cyclictest2555-21seq20:33:531
28146995214,11cyclictest30360-21seq21:32:431
134491520,3ptp4l0-21swapper/220:00:122
134491520,11ptp4l0-21swapper/023:05:400
2814899515,4cyclictest41-21ksoftirqd/320:25:243
2814899514,8cyclictest41-21ksoftirqd/321:40:283
2814899514,6cyclictest0-21swapper/323:50:173
2814899513,7cyclictest0-21swapper/322:10:223
2814899513,6cyclictest41-21ksoftirqd/322:20:243
2814899513,6cyclictest41-21ksoftirqd/300:35:163
2814899513,6cyclictest41-21ksoftirqd/300:15:193
2814899512,7cyclictest0-21swapper/323:35:173
2814899512,7cyclictest0-21swapper/321:50:123
2814899512,7cyclictest0-21swapper/300:10:173
2814899512,6cyclictest41-21ksoftirqd/319:40:113
2814899512,6cyclictest17274-21if_enp4s019:55:183
2814899512,11cyclictest0-21swapper/300:29:013
2814899512,10cyclictest0-21swapper/322:15:203
2814899511,8cyclictest0-21swapper/320:35:183
2814899511,6cyclictest41-21ksoftirqd/320:50:263
2814899511,6cyclictest0-21swapper/323:40:273
2814899510,6cyclictest41-21ksoftirqd/323:05:243
2814699519,7cyclictest24107-21df21:20:131
134491510,9ptp4l26123-21diskstats19:05:191
134491510,4ptp4l0-21swapper/219:25:302
134491510,4ptp4l0-21swapper/022:40:500
134491510,4ptp4l0-21swapper/021:07:000
134491510,3ptp4l0-21swapper/219:38:592
2814899505,7cyclictest41-21ksoftirqd/321:25:293
2814899504,7cyclictest41-21ksoftirqd/321:20:193
2814899503,9cyclictest41-21ksoftirqd/321:45:173
2814899503,7cyclictest0-21swapper/321:55:183
2814899503,6cyclictest41-21ksoftirqd/323:55:133
2814899502,9cyclictest41-21ksoftirqd/319:10:193
2814899502,7cyclictest41-21ksoftirqd/322:00:213
2814899502,6cyclictest0-21swapper/321:15:303
2814899502,6cyclictest0-21swapper/319:35:263
2814699507,42cyclictest16716-21kworker/1:222:35:291
28146995011,7cyclictest2435-21users21:40:281
134491500,9ptp4l0-21swapper/219:11:552
134491500,4ptp4l0-21swapper/220:05:142
134491500,3ptp4l0-21swapper/300:21:443
134491500,3ptp4l0-21swapper/200:06:142
134491500,12ptp4l0-21swapper/019:36:120
2814899495,7cyclictest41-21ksoftirqd/321:05:193
2814899494,8cyclictest41-21ksoftirqd/320:20:263
2814899494,7cyclictest41-21ksoftirqd/300:30:303
2814899492,7cyclictest0-21swapper/323:10:123
2814899492,6cyclictest0-21swapper/321:35:003
2814899492,6cyclictest0-21swapper/321:10:163
2814899492,6cyclictest0-21swapper/320:45:133
2814899492,6cyclictest0-21swapper/319:25:153
2814899492,11cyclictest0-21swapper/319:45:283
2814699499,8cyclictest11062-21ntpq22:00:221
28146994915,9cyclictest17211-21taskset00:30:371
134491490,5ptp4l0-21swapper/019:14:480
134491490,4ptp4l0-21swapper/200:18:032
134491490,4ptp4l0-21swapper/023:29:080
134491490,4ptp4l0-21swapper/022:50:530
134491490,4ptp4l0-21swapper/022:49:370
134491490,4ptp4l0-21swapper/019:27:280
134491490,3ptp4l0-21swapper/000:20:420
2814899484,7cyclictest41-21ksoftirqd/323:20:143
2814899483,6cyclictest41-21ksoftirqd/320:15:273
2814899482,6cyclictest41-21ksoftirqd/320:00:123
2814899482,6cyclictest0-21swapper/320:31:423
2814899482,6cyclictest0-21swapper/319:51:543
2814899481,5cyclictest0-21swapper/322:42:443
134491480,3ptp4l0-21swapper/220:10:122
2814899474,7cyclictest41-21ksoftirqd/322:30:143
2814899474,6cyclictest41-21ksoftirqd/319:15:183
2814899473,8cyclictest41-21ksoftirqd/319:25:003
2814899472,10cyclictest0-21swapper/321:00:053
28146994715,11cyclictest18952-21taskset22:19:471
134691470,7getstats2814599cyclictest20:46:130
134491470,4ptp4l0-21swapper/220:33:262
134491470,3ptp4l0-21swapper/220:24:152
134491470,11ptp4l258642chrt22:34:490
2814899462,6cyclictest0-21swapper/300:00:173
2814899462,11cyclictest0-21swapper/320:05:153
2814899461,6cyclictest41-21ksoftirqd/322:55:183
2814899461,6cyclictest41-21ksoftirqd/322:55:183
2814699464,6cyclictest134491ptp4l23:00:161
28146994611,6cyclictest5784-21iostat_ios20:40:171
28146994610,7cyclictest29815-21iostat_ios23:50:181
28146994610,12cyclictest24147-21perl20:10:141
134491460,4ptp4l0-21swapper/021:40:470
134491460,3ptp4l0-21swapper/023:00:170
2814899452,6cyclictest41-21ksoftirqd/323:30:183
2814899452,6cyclictest41-21ksoftirqd/323:30:183
134491450,5ptp4l0-21swapper/020:25:110
134491450,4ptp4l0-21swapper/219:21:272
134491450,4ptp4l0-21swapper/000:18:050
134491450,3ptp4l0-21swapper/021:59:370
134491450,3ptp4l0-21swapper/000:30:250
134491450,10ptp4l0-21swapper/223:20:442
134491450,10ptp4l0-21swapper/119:32:281
2814899444,6cyclictest41-21ksoftirqd/300:05:293
134491440,5ptp4l0-21swapper/219:55:282
134491440,4ptp4l0-21swapper/022:36:130
134491440,3ptp4l30963-21apt-get22:45:102
2814699438,6cyclictest134491ptp4l00:10:131
28146994311,9cyclictest0-21swapper/120:03:431
134491430,9ptp4l0-21swapper/022:03:360
134491430,2ptp4l673-21ls23:55:290
134491430,10ptp4l0-21swapper/223:04:102
28146994214,11cyclictest23402-21taskset21:17:131
134491420,9ptp4l0-21swapper/223:06:192
134491420,9ptp4l0-21swapper/023:11:260
134491420,8ptp4l0-21swapper/221:58:072
134491420,7ptp4l9-21ksoftirqd/019:40:120
134491420,5ptp4l0-21swapper/123:30:271
134491420,5ptp4l0-21swapper/123:30:271
134491420,5ptp4l0-21swapper/019:50:180
134491420,5ptp4l0-21swapper/000:10:130
134491420,4ptp4l0-21swapper/221:01:502
134491420,3ptp4l14248-21apt-get19:50:102
134491420,11ptp4l9-21ksoftirqd/023:31:520
134491420,11ptp4l9-21ksoftirqd/023:31:520
134691410,10getstats0-21swapper/122:55:081
134691410,10getstats0-21swapper/122:55:081
134691410,10getstats0-21swapper/120:54:191
134691410,10getstats0-21swapper/120:46:471
134491410,8ptp4l0-21swapper/220:59:022
134491410,5ptp4l31447-21sed21:35:200
134491410,5ptp4l13783-21open_inodes23:15:232
134491410,5ptp4l10769-21hddtemp_smartct23:10:151
134491410,5ptp4l0-21swapper/200:00:292
134491410,5ptp4l0-21swapper/123:05:261
134491410,4ptp4l7649-21diskstats19:35:141
134491410,4ptp4l5422-21df20:40:120
134491410,4ptp4l5347-21df_inode19:30:142
134491410,4ptp4l0-21swapper/220:25:192
134491410,4ptp4l0-21swapper/021:00:160
134491410,3ptp4l808-21hddtemp_smartct19:20:280
134491410,3ptp4l20182-21ls22:20:190
134491410,3ptp4l0-21swapper/021:45:250
134491410,2ptp4l0-21swapper/123:15:111
134491400,9ptp4l0-21swapper/221:37:502
134491400,8ptp4l0-21swapper/000:26:520
134491400,5ptp4l28304-21ls23:45:272
134491400,5ptp4l0-21swapper/222:50:112
134491400,5ptp4l0-21swapper/222:35:242
134491400,5ptp4l0-21swapper/221:31:442
134491400,5ptp4l0-21swapper/200:26:112
134491400,5ptp4l0-21swapper/022:15:200
134491400,4ptp4l27362-21python20:15:250
134491400,4ptp4l0-21swapper/222:55:182
134491400,4ptp4l0-21swapper/222:55:182
134491400,4ptp4l0-21swapper/222:20:112
134491400,4ptp4l0-21swapper/221:20:152
134491400,4ptp4l0-21swapper/220:35:162
134491400,4ptp4l0-21swapper/220:16:332
134491400,4ptp4l0-21swapper/122:44:461
134491400,4ptp4l0-21swapper/121:05:161
134491400,4ptp4l0-21swapper/023:38:290
134491400,4ptp4l0-21swapper/022:58:530
134491400,4ptp4l0-21swapper/022:58:530
134491400,4ptp4l0-21swapper/022:08:430
134491400,4ptp4l0-21swapper/020:35:260
134491400,4ptp4l0-21swapper/020:35:000
134491400,4ptp4l0-21swapper/019:48:040
134491400,4ptp4l0-21swapper/019:16:190
134491400,3ptp4l14571-21apt-get22:10:130
134491400,3ptp4l0-21swapper/123:42:441
134491400,3ptp4l0-21swapper/019:56:000
134491400,2ptp4l2318-21gnome-shell21:10:592
134691390,10getstats0-21swapper/119:20:331
134491390,5ptp4l0-21swapper/222:30:292
134491390,5ptp4l0-21swapper/119:10:141
134491390,4ptp4l0-21swapper/223:51:522
134491390,4ptp4l0-21swapper/223:40:322
134491390,4ptp4l0-21swapper/223:25:512
134491390,4ptp4l0-21swapper/223:13:302
134491390,4ptp4l0-21swapper/222:41:162
134491390,4ptp4l0-21swapper/222:19:172
134491390,4ptp4l0-21swapper/221:46:492
134491390,4ptp4l0-21swapper/221:44:432
134491390,4ptp4l0-21swapper/221:15:492
134491390,4ptp4l0-21swapper/220:48:282
134491390,4ptp4l0-21swapper/200:35:462
134491390,4ptp4l0-21swapper/200:33:052
134491390,4ptp4l0-21swapper/121:46:191
134491390,4ptp4l0-21swapper/100:17:311
134491390,4ptp4l0-21swapper/023:17:570
134491390,4ptp4l0-21swapper/022:28:350
134491390,4ptp4l0-21swapper/020:06:520
134491390,3ptp4l0-21swapper/222:03:512
134491390,3ptp4l0-21swapper/122:26:481
134491380,4ptp4l0-21swapper/223:31:462
134491380,4ptp4l0-21swapper/223:31:462
134491380,4ptp4l0-21swapper/222:13:052
134491380,4ptp4l0-21swapper/222:06:332
134491380,4ptp4l0-21swapper/221:51:172
134491380,4ptp4l0-21swapper/220:50:462
134491380,4ptp4l0-21swapper/200:20:072
134491380,4ptp4l0-21swapper/023:21:060
134491380,3ptp4l0-21swapper/223:35:242
134491380,3ptp4l0-21swapper/121:35:081
134491370,4ptp4l0-21swapper/100:29:341
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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