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2026-04-02 - 10:11
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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 Thu Apr 02, 2026 00:45:34)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3115521670,4sleep21801799cyclictest00:15:152
18015997817,58cyclictest14287-21/usr/sbin/munin20:10:150
18018997722,9cyclictest41-21ksoftirqd/323:20:153
18018996931,7cyclictest41-21ksoftirqd/321:55:003
18018996929,8cyclictest41-21ksoftirqd/323:35:003
1801599698,58cyclictest27536-21timerandwakeup00:05:260
18018996833,8cyclictest41-21ksoftirqd/323:10:003
18018996732,5cyclictest41-21ksoftirqd/320:00:263
18015996611,10cyclictest8227-21mailstats21:05:250
134491650,21ptp4l11867-21iostat20:05:181
18018996432,4cyclictest41-21ksoftirqd/323:40:173
18018996430,7cyclictest41-21ksoftirqd/319:40:143
1801599648,10cyclictest388-21gmain21:30:260
18018996332,8cyclictest41-21ksoftirqd/300:15:253
18018996330,9cyclictest41-21ksoftirqd/320:20:083
18015996314,11cyclictest1334-21taskset19:43:000
18018996232,9cyclictest41-21ksoftirqd/320:25:153
18018996232,7cyclictest41-21ksoftirqd/300:20:263
18018996227,7cyclictest41-21ksoftirqd/321:45:273
1801599629,10cyclictest30460-21latency19:35:170
18015996213,10cyclictest18664-21taskset23:49:550
18018996132,5cyclictest41-21ksoftirqd/319:35:233
18018996131,8cyclictest41-21ksoftirqd/320:05:263
18018996130,8cyclictest41-21ksoftirqd/300:00:133
18018996129,3cyclictest41-21ksoftirqd/300:10:003
18018996128,8cyclictest41-21ksoftirqd/321:30:223
18018996127,7cyclictest41-21ksoftirqd/322:55:203
18018996126,6cyclictest41-21ksoftirqd/320:10:143
18018996032,9cyclictest41-21ksoftirqd/319:20:153
18018996031,6cyclictest41-21ksoftirqd/321:05:253
18018996030,7cyclictest41-21ksoftirqd/319:25:133
18018996026,6cyclictest41-21ksoftirqd/319:15:133
18018996025,6cyclictest41-21ksoftirqd/321:10:273
18018996024,8cyclictest41-21ksoftirqd/319:55:013
18018996024,6cyclictest41-21ksoftirqd/319:30:253
1801599608,11cyclictest26334-21sed20:35:210
1801599608,11cyclictest16208-21latency_hist22:35:000
1801599608,11cyclictest16208-21latency_hist22:35:000
1801599608,10cyclictest29285-21mailstats23:00:240
18015996010,9cyclictest24042-21if_enp4s000:00:160
18018995932,8cyclictest41-21ksoftirqd/323:45:263
18018995927,6cyclictest41-21ksoftirqd/323:00:263
18018995926,7cyclictest41-21ksoftirqd/322:00:253
18018995926,7cyclictest41-21ksoftirqd/322:00:253
18018995925,8cyclictest41-21ksoftirqd/322:35:003
18018995925,8cyclictest41-21ksoftirqd/322:35:003
18018995925,7cyclictest41-21ksoftirqd/322:09:333
18018995925,6cyclictest41-21ksoftirqd/322:25:123
18018995924,9cyclictest41-21ksoftirqd/321:35:273
1801599599,9cyclictest0-21swapper/020:30:150
1801599598,10cyclictest3722-21cat20:55:270
18015995914,11cyclictest22740-21taskset20:29:100
18015995913,11cyclictest6380-21taskset19:54:270
18015995913,11cyclictest4468-21taskset22:07:020
18015995913,11cyclictest20194-21taskset20:21:280
18015995913,11cyclictest10773-21taskset20:01:370
134491590,4ptp4l0-21swapper/119:09:481
134491590,4ptp4l0-21swapper/023:35:200
18018995828,8cyclictest41-21ksoftirqd/323:15:193
18018995825,6cyclictest41-21ksoftirqd/323:55:133
1801599587,15cyclictest31060-21ntp_kernel_pll_20:45:200
18015995813,11cyclictest30404-21taskset00:12:460
134491580,3ptp4l0-21swapper/200:25:222
18018995731,6cyclictest41-21ksoftirqd/321:25:003
18018995726,8cyclictest41-21ksoftirqd/321:25:263
18018995725,7cyclictest41-21ksoftirqd/320:50:193
18018995724,8cyclictest41-21ksoftirqd/321:00:253
18018995720,7cyclictest41-21ksoftirqd/321:45:013
1801599579,10cyclictest1282-21timerandwakeup20:50:250
1801599576,9cyclictest0-21swapper/023:40:220
18015995716,9cyclictest27539-21taskset22:57:470
18015995710,43cyclictest8542-21/usr/sbin/munin23:25:240
134491570,4ptp4l0-21swapper/119:52:561
134491570,3ptp4l8087-21irqstats22:15:201
18018995625,8cyclictest41-21ksoftirqd/319:45:193
1801599569,12cyclictest5887-21ls22:10:190
18015995615,23cyclictest2263-21taskset22:04:340
18015995615,23cyclictest2263-21taskset22:04:340
18015995611,11cyclictest1317-21runrttasks19:48:110
18015995611,10cyclictest0-21swapper/021:12:210
18015995610,9cyclictest23250-21date22:50:000
134491560,4ptp4l0-21swapper/223:20:222
134491560,4ptp4l0-21swapper/119:20:151
134491560,3ptp4l0-21swapper/122:45:201
18018995524,6cyclictest41-21ksoftirqd/322:50:173
1801599556,12cyclictest24992-21unixbench_singl22:50:270
18015995515,9cyclictest30303-21taskset21:55:070
18015995515,10cyclictest4913-21taskset00:26:480
18015995511,9cyclictest0-21swapper/021:53:290
134491550,4ptp4l1625-21switchtime22:00:261
134491550,4ptp4l1625-21switchtime22:00:251
134491550,4ptp4l0-21swapper/122:53:261
18018995422,3cyclictest41-21ksoftirqd/321:55:293
1801599548,11cyclictest8810-21ntpq00:35:220
18015995414,11cyclictest18142-21taskset20:19:550
18015995410,41cyclictest12500-21cat21:15:230
134491540,3ptp4l0-21swapper/221:05:262
1801899534,5cyclictest41-21ksoftirqd/300:25:133
1801599538,9cyclictest0-21swapper/020:40:130
18015995316,11cyclictest22939-21taskset21:37:060
18015995315,9cyclictest20622-21taskset23:50:370
18015995315,11cyclictest6676-21taskset23:21:280
134491530,4ptp4l0-21swapper/200:35:212
134491530,4ptp4l0-21swapper/121:53:221
134491530,4ptp4l0-21swapper/120:39:441
134491530,3ptp4l0-21swapper/200:33:442
1801899525,3cyclictest41-21ksoftirqd/300:10:113
1801899522,7cyclictest0-21swapper/320:55:223
1801899522,7cyclictest0-21swapper/300:35:233
18018995221,6cyclictest41-21ksoftirqd/322:13:103
18015995215,10cyclictest1987-21taskset23:11:530
134491520,5ptp4l0-21swapper/019:07:270
134491520,3ptp4l0-21swapper/223:43:302
1801899515,3cyclictest41-21ksoftirqd/321:15:293
1801899512,7cyclictest41-21ksoftirqd/323:40:013
18015995115,11cyclictest11459-21taskset23:33:570
134491510,4ptp4l0-21swapper/222:48:402
134491510,4ptp4l0-21swapper/119:13:541
1801899502,7cyclictest0-21swapper/320:18:393
18018995019,7cyclictest41-21ksoftirqd/319:55:253
1801599509,31cyclictest8549-21mailstats22:15:260
1801599507,8cyclictest6162-21ls21:00:270
18015995014,10cyclictest8657-21runrttasks19:59:140
18015995012,12cyclictest26037-21ntpq19:25:210
18015995010,11cyclictest0-21swapper/022:40:290
134491500,5ptp4l0-21swapper/123:13:041
134491500,4ptp4l0-21swapper/219:50:062
134491500,3ptp4l0-21swapper/120:17:221
134491500,13ptp4l0-21swapper/200:05:002
1801899497,6cyclictest41-21ksoftirqd/322:40:143
1801899494,7cyclictest41-21ksoftirqd/300:30:263
18018994937,10cyclictest391rcuc/320:40:263
18018994932,7cyclictest41-21ksoftirqd/323:10:133
1801899492,7cyclictest41-21ksoftirqd/323:55:003
18018994923,7cyclictest41-21ksoftirqd/320:30:163
18018994922,7cyclictest41-21ksoftirqd/322:15:143
18018994918,8cyclictest41-21ksoftirqd/320:35:143
1801599497,8cyclictest6842-21ls00:30:270
1801599496,10cyclictest12409-21ntpq20:05:230
18015994913,11cyclictest0-21swapper/022:39:040
18015994911,9cyclictest0-21swapper/019:23:150
134491490,4ptp4l0-21swapper/221:35:552
134491490,4ptp4l0-21swapper/220:09:022
1801899484,3cyclictest41-21ksoftirqd/322:35:243
1801899480,6cyclictest41-21ksoftirqd/322:22:253
1801599488,14cyclictest21650-21fw_packets23:55:150
18015994810,9cyclictest0-21swapper/022:23:250
134491480,9ptp4l0-21swapper/119:33:471
134491480,5ptp4l0-21swapper/123:21:331
134491480,4ptp4l0-21swapper/222:20:382
134491480,3ptp4l0-21swapper/222:50:102
134491480,3ptp4l0-21swapper/220:02:412
134491480,3ptp4l0-21swapper/119:40:431
134491480,12ptp4l0-21swapper/100:14:301
18018994738,3cyclictest41-21ksoftirqd/320:49:593
1801599478,8cyclictest31062-21df00:15:140
1801599477,7cyclictest19547-21ls19:10:270
1801899465,2cyclictest41-21ksoftirqd/323:25:213
1801899464,6cyclictest41-21ksoftirqd/319:10:163
1801899461,7cyclictest41-21ksoftirqd/322:50:003
1801599467,7cyclictest27460-21df19:30:130
134491460,4ptp4l0-21swapper/223:15:342
134491460,3ptp4l0-21swapper/120:20:261
134491450,4ptp4l0-21swapper/222:56:532
134491450,4ptp4l0-21swapper/123:58:401
134491450,3ptp4l0-21swapper/219:31:242
1801599446,8cyclictest16889-21ps21:25:190
1801599446,21cyclictest2386-21ls00:20:250
18015994413,10cyclictest16052-21runrttasks21:24:590
134491440,8ptp4l0-21swapper/221:43:392
134491440,5ptp4l0-21swapper/121:55:271
134491440,4ptp4l728-21apt-get00:20:111
134491440,4ptp4l0-21swapper/219:36:202
134491440,3ptp4l0-21swapper/122:55:221
1801599439,16cyclictest0-21swapper/023:05:180
134491430,9ptp4l0-21swapper/223:39:532
134491430,5ptp4l0-21swapper/223:31:332
134491430,3ptp4l0-21swapper/219:16:242
134491420,5ptp4l0-21swapper/220:35:172
134491420,4ptp4l18777-21apt-get22:40:121
134491420,11ptp4l0-21swapper/222:38:462
1801599418,11cyclictest0-21swapper/023:15:350
134491410,5ptp4l28290-21diskstats23:00:141
134491410,5ptp4l0-21swapper/223:00:202
134491410,5ptp4l0-21swapper/119:25:121
134491410,4ptp4l5898-21meminfo22:10:201
134491410,4ptp4l14011-21apt-get21:20:121
134491410,4ptp4l12800-21ls22:25:190
134491410,4ptp4l0-21swapper/220:22:572
134491410,4ptp4l0-21swapper/121:41:201
134491410,4ptp4l0-21swapper/121:35:301
134491410,4ptp4l0-21swapper/121:13:201
134491410,4ptp4l0-21swapper/120:25:271
134491410,3ptp4l32575-21apt-get23:10:112
134491410,3ptp4l17884-21ls21:25:271
18016994035,3cyclictest25-21ksoftirqd/100:05:001
18016994034,3cyclictest25-21ksoftirqd/123:35:001
134491400,8ptp4l0-21swapper/200:05:242
134491400,6ptp4l0-21swapper/222:25:182
134491400,5ptp4l0-21swapper/221:57:142
134491400,5ptp4l0-21swapper/219:14:312
134491400,4ptp4l8025-21sensors_temp19:55:261
134491400,4ptp4l30399-21hddtemp_smartct20:45:151
134491400,4ptp4l11787-21diskstats21:15:171
134491400,4ptp4l0-21swapper/219:56:052
134491400,4ptp4l0-21swapper/219:24:012
134491400,4ptp4l0-21swapper/120:10:181
134491400,4ptp4l0-21swapper/119:45:151
134491400,4ptp4l0-21swapper/119:35:101
134491400,4ptp4l0-21swapper/100:38:181
134491400,4ptp4l0-21swapper/019:15:130
134491400,3ptp4l26484-21hddtemp_smartct00:05:151
134491400,3ptp4l14727-21iostat_ios22:30:181
134491400,3ptp4l14727-21iostat_ios22:30:181
18016993934,3cyclictest25-21ksoftirqd/122:40:001
134491390,8ptp4l0-21swapper/221:47:402
134491390,5ptp4l7068-21tr21:05:131
134491390,5ptp4l0-21swapper/223:27:282
134491390,5ptp4l0-21swapper/220:30:132
134491390,5ptp4l0-21swapper/123:06:261
134491390,4ptp4l9506-21/usr/sbin/munin21:10:162
134491390,4ptp4l5166-21iostat_ios21:00:182
134491390,4ptp4l26160-21hddtemp_smartct21:45:161
134491390,4ptp4l12812-21/usr/sbin/munin22:25:201
134491390,4ptp4l10909-21python22:20:261
134491390,4ptp4l0-21swapper/223:05:232
134491390,4ptp4l0-21swapper/222:30:282
134491390,4ptp4l0-21swapper/222:30:282
134491390,4ptp4l0-21swapper/222:15:102
134491390,4ptp4l0-21swapper/222:12:082
134491390,4ptp4l0-21swapper/221:53:362
134491390,4ptp4l0-21swapper/221:31:562
134491390,4ptp4l0-21swapper/221:25:112
134491390,4ptp4l0-21swapper/221:16:202
134491390,4ptp4l0-21swapper/220:55:512
134491390,4ptp4l0-21swapper/220:53:242
134491390,4ptp4l0-21swapper/220:45:222
134491390,4ptp4l0-21swapper/220:16:272
134491390,4ptp4l0-21swapper/220:10:092
134491390,4ptp4l0-21swapper/219:45:092
134491390,4ptp4l0-21swapper/219:40:202
134491390,4ptp4l0-21swapper/219:26:072
134491390,4ptp4l0-21swapper/122:05:191
134491390,4ptp4l0-21swapper/120:50:281
134491390,4ptp4l0-21swapper/120:40:271
134491390,4ptp4l0-21swapper/120:00:051
134491390,4ptp4l0-21swapper/021:46:480
134491390,3ptp4l22628-21apt-get20:28:052
134491390,3ptp4l18988-21df22:40:142
134491390,3ptp4l0-21swapper/220:40:562
134491390,3ptp4l0-21swapper/119:15:171
134491390,3ptp4l0-21swapper/021:40:110
134491380,4ptp4l2758-21if_err_enp1s020:55:191
134491380,4ptp4l0-21swapper/223:55:072
134491380,4ptp4l0-21swapper/223:50:182
134491380,4ptp4l0-21swapper/222:05:482
134491380,4ptp4l0-21swapper/222:04:302
134491380,4ptp4l0-21swapper/222:04:302
134491380,4ptp4l0-21swapper/221:23:522
134491380,4ptp4l0-21swapper/200:20:162
134491380,4ptp4l0-21swapper/200:13:422
134491380,4ptp4l0-21swapper/123:48:381
134491380,4ptp4l0-21swapper/120:30:271
134491380,3ptp4l0-21swapper/121:04:001
134491380,3ptp4l0-21swapper/100:28:381
134491370,5ptp4l0-21swapper/319:05:013
134491370,4ptp4l0-21swapper/123:50:221
134491370,4ptp4l0-21swapper/123:39:131
134491370,4ptp4l0-21swapper/123:15:141
134491370,4ptp4l0-21swapper/100:31:201
134491370,4ptp4l0-21swapper/100:15:141
134491370,3ptp4l7360-21grep23:25:121
134491370,3ptp4l0-21swapper/223:45:062
134491370,3ptp4l0-21swapper/123:40:061
134491360,4ptp4l0-21swapper/121:32:471
134491350,3ptp4l0-21swapper/219:05:042
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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