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2026-03-10 - 15:28
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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 Tue Mar 10, 2026 12:45:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1917822120,7sleep119181-21needreboot07:05:221
20603997012,55cyclictest1359-21mailstats07:35:260
20603996910,57cyclictest7138-21latency_hist11:19:590
20603996817,11cyclictest9024-21taskset11:20:520
20603996815,14cyclictest1317-21runrttasks11:12:070
20603996717,11cyclictest8638-21taskset09:00:270
20603996617,10cyclictest27429-21taskset09:41:480
2060399659,15cyclictest15498-21switchtime10:25:250
20603996518,10cyclictest15996-21taskset08:09:490
20603996517,9cyclictest10420-21ls12:35:160
20603996514,10cyclictest25032-21seq07:19:400
20603996511,51cyclictest32737-21apt-get11:05:100
20603996417,11cyclictest29845-21taskset10:55:580
20603996417,11cyclictest29845-21taskset10:55:570
20603996417,10cyclictest9594-21taskset12:33:370
20603996417,10cyclictest13662-21taskset11:30:470
20603996417,10cyclictest13580-21taskset10:21:350
20603996416,11cyclictest25035-21taskset10:45:550
20603996416,11cyclictest13732-21taskset09:13:270
20603996415,9cyclictest18015-21tail10:30:270
20603996316,11cyclictest27938-21seq12:01:100
20603996315,10cyclictest2964-21cat12:20:010
20603996314,45cyclictest19720-21grep09:25:220
20603996219,10cyclictest22526-21taskset07:12:060
20603996214,9cyclictest22457-21timerandwakeup10:40:270
20603996213,11cyclictest5353-21sed07:45:180
20603996210,10cyclictest17220-21missed_timers08:10:210
134491620,4ptp4l0-21swapper/207:05:262
134491620,4ptp4l0-21swapper/111:40:001
2060699612,25cyclictest0-21swapper/310:37:403
2060399619,11cyclictest31459-21cat08:40:240
20603996120,17cyclictest22786-21taskset08:23:140
20603996120,10cyclictest29890-21seq09:48:560
20603996119,15cyclictest4375-21seq07:43:590
20603996119,10cyclictest32254-21taskset09:54:420
20603996116,10cyclictest1930-21taskset08:48:440
20603996115,9cyclictest5807-21sed12:25:150
20603996013,12cyclictest16031-21ls11:35:290
20603996012,14cyclictest18231-21taskset09:21:580
20603996011,14cyclictest23142-21cat11:50:270
20603996010,10cyclictest25316-21/usr/sbin/munin07:20:140
134491600,4ptp4l0-21swapper/011:00:280
20603995920,16cyclictest30225-21seq12:05:590
20603995919,9cyclictest11135-21seq10:15:390
20603995916,11cyclictest25729-21seq11:57:330
20603995913,43cyclictest8722-21/usr/sbin/munin10:10:270
20603995820,11cyclictest5110-21cat12:24:540
20603995819,16cyclictest20713-21seq10:39:350
20603995819,10cyclictest27445-21taskset08:34:020
20603995816,9cyclictest2009-21runrttasks09:57:550
134491580,4ptp4l0-21swapper/109:45:231
134491580,3ptp4l0-21swapper/109:36:311
20603995720,17cyclictest11048-21taskset07:56:190
20603995719,16cyclictest11247-21taskset09:06:420
2060399570,22cyclictest1317-21runrttasks08:54:230
134491570,4ptp4l0-21swapper/110:42:321
134491570,4ptp4l0-21swapper/009:17:350
134491570,3ptp4l0-21swapper/108:20:141
134491570,14ptp4l0-21swapper/112:15:221
20603995617,11cyclictest4197-21taskset10:00:340
20603995611,16cyclictest5594-21missed_timers08:55:210
20603995518,9cyclictest6740-21taskset10:08:440
20603995518,10cyclictest20517-21runrttasks08:18:500
20603995512,9cyclictest24425-21ntp_kernel_pll_09:35:230
134491550,4ptp4l0-21swapper/109:08:181
2060699545,6cyclictest0-21swapper/307:20:243
20603995418,17cyclictest9039-21taskset07:54:570
134491540,4ptp4l0-21swapper/209:34:022
134491540,4ptp4l0-21swapper/112:13:361
2060699532,6cyclictest0-21swapper/310:30:223
20603995319,7cyclictest18667-21seq11:43:090
20603995317,11cyclictest29718-21taskset07:27:580
20603995317,10cyclictest365-21runrttasks12:14:550
20603995316,11cyclictest13650-21runrttasks08:04:100
20603995310,13cyclictest28015-21df_abs08:35:140
134491530,3ptp4l0-21swapper/211:45:062
134491530,3ptp4l0-21swapper/209:45:202
134491530,3ptp4l0-21swapper/207:43:272
134491530,3ptp4l0-21swapper/111:28:091
2060699523,11cyclictest0-21swapper/310:46:453
134491520,9ptp4l18138-21apt-get07:05:130
134491520,4ptp4l0-21swapper/110:52:591
134491520,4ptp4l0-21swapper/107:19:551
134491520,3ptp4l0-21swapper/212:19:162
134491520,3ptp4l0-21swapper/212:05:262
134491520,3ptp4l0-21swapper/208:54:532
134491520,3ptp4l0-21swapper/108:05:451
134491520,12ptp4l0-21swapper/109:31:231
134491520,11ptp4l0-21swapper/211:10:002
2060699516,6cyclictest0-21swapper/308:20:213
2060699515,10cyclictest0-21swapper/307:40:133
2060699513,11cyclictest0-21swapper/310:54:003
2060699510,6cyclictest15077-21ntpq08:05:223
178572510,5sleep22060599cyclictest10:30:262
134491510,4ptp4l0-21swapper/109:22:191
134491510,10ptp4l0-21swapper/111:17:381
2060699505,6cyclictest0-21swapper/310:20:163
2060699504,6cyclictest41-21ksoftirqd/309:10:193
2060699504,11cyclictest0-21swapper/309:30:233
2060699503,7cyclictest0-21swapper/312:30:163
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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