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2026-04-02 - 07:41
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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 100 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
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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