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2025-12-25 - 09:02
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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 rackbslot1.osadl.org (updated Wed Dec 24, 2025 12:44:36)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
20209452222167,13sleep10-21swapper/107:09:281
20206832200172,18sleep30-21swapper/307:06:143
20208412196168,18sleep20-21swapper/207:08:092
20207962194170,14sleep00-21swapper/007:07:350
2021172997368,2cyclictest247562-13Chrome_ChildIOT10:45:021
2021172996750,5cyclictest2053026-21/usr/share/muni07:40:151
2021169996761,4cyclictest2150891-21kworker/u8:2+events_unbound09:45:010
2021172996258,3cyclictest2273614-21kworker/u8:0+events_unbound11:30:091
2021172996258,3cyclictest2273614-21kworker/u8:0+events_unbound11:30:091
2021169995847,9cyclictest2275027-21latency_hist11:15:010
2021169995840,11cyclictest3125688-21Chrome_ChildIOT07:21:100
2021173995750,5cyclictest2280475-21/usr/share/muni11:20:162
2021173995750,5cyclictest2280475-21/usr/share/muni11:20:162
2021169995749,7cyclictest2150891-21kworker/u8:2+flush-179:009:35:120
2021175995652,3cyclictest2341278-21kworker/u8:3+events_unbound12:25:293
2021175995447,5cyclictest3125687-21ThreadPoolForeg07:10:203
2021172995445,8cyclictest2310906-21kworker/u8:2+flush-179:012:05:171
2021173995349,3cyclictest2235776-21kworker/u8:3+flush-179:011:05:002
2021172995147,3cyclictest3125724-21ThreadPoolForeg10:54:151
2021172995135,4cyclictest2026410-21/usr/share/muni07:15:011
2021175995045,3cyclictest2310069-21munin-limits11:45:303
2021172995046,3cyclictest2156265-21munin-update09:20:311
2021169995043,5cyclictest2316413-21/usr/share/muni11:55:190
2021169995039,9cyclictest2285320-21munin-update11:25:060
2021173994945,3cyclictest2077053-21kworker/u8:4+events_unbound08:35:242
2021173994945,3cyclictest2068060-21kworker/u8:0+flush-179:008:00:162
2021172994945,2cyclictest2305923-13chrome11:45:021
2021172994943,5cyclictest2359029-21ntpq12:35:151
2021175994842,4cyclictest3125724-21ThreadPoolForeg10:50:003
2021173994842,4cyclictest2258596-21munin-limits10:55:362
2021172994844,3cyclictest76405-21systemd-journal09:50:011
2021175994742,4cyclictest3125724-21ThreadPoolForeg07:40:003
2021173994743,3cyclictest2196549-21kworker/u8:5+flush-179:010:35:062
2021173994742,3cyclictest2140166-21kworker/u8:1+flush-179:009:10:062
2021173994742,3cyclictest2063371-21/usr/share/muni07:50:142
2021173994735,11cyclictest2020793-21kworker/2:1+pm08:21:192
2021172994741,5cyclictest247516-21Chrome_ChildIOT10:40:341
2021175994642,3cyclictest2295527-21munin-update11:35:343
2021175994641,3cyclictest2032582-21/usr/share/muni07:20:143
2021173994644,1cyclictest2181658-21kworker/2:0+pm10:27:012
2021173994643,2cyclictest2020793-21kworker/2:1+pm09:32:152
2021173994639,5cyclictest2238506-21/usr/share/muni10:40:132
2021172994643,3cyclictest2032367-21kworker/u8:3+flush-179:007:35:311
2021172994641,4cyclictest3125724-21ThreadPoolForeg09:15:301
2021172994641,4cyclictest3125724-21ThreadPoolForeg09:15:301
2021172994641,4cyclictest247561-21ThreadPoolForeg08:25:341
2021169994639,5cyclictest2357720-21/usr/share/muni12:35:090
2021175994542,2cyclictest2279822-21kworker/u8:1+flush-179:011:30:223
2021175994542,2cyclictest2279822-21kworker/u8:1+flush-179:011:30:223
2021173994539,5cyclictest2021318-21/usr/share/muni07:10:052
2021169994539,4cyclictest2058181-21CacheThread_Blo07:45:000
2021169994538,5cyclictest247561-21ThreadPoolForeg11:09:490
2021169994538,5cyclictest2233369-21/usr/share/muni10:35:220
2021173994440,3cyclictest2166311-21kworker/u8:0+flush-179:010:00:152
2021173994439,4cyclictest2310906-21kworker/u8:2+events_unbound12:20:162
2021172994440,3cyclictest2243164-21kworker/u8:2+flush-179:011:15:261
2021172994440,3cyclictest2243164-21kworker/u8:2+flush-179:011:15:261
2021172994439,4cyclictest247516-21Chrome_ChildIOT11:05:341
2021169994438,5cyclictest2085247-21ntpq08:10:160
2021169994438,4cyclictest2312556-21apt-get11:50:120
2021169994432,3cyclictest2279818-21kworker/0:0+pm12:07:200
2021175994340,2cyclictest2176384-21kworker/u8:3+flush-179:010:05:243
2021175994339,3cyclictest2258940-31munin-graph10:56:123
2021175994337,5cyclictest247561-21ThreadPoolForeg12:22:493
202117399431,15cyclictest247557-21chrome08:46:112
2021169994334,7cyclictest247561-21ThreadPoolForeg07:35:090
2021173994239,2cyclictest2020793-21kworker/2:1+pm07:28:152
2021173994237,4cyclictest2235776-21kworker/u8:3+flush-179:011:06:372
2021173994236,4cyclictest247516-21Chrome_ChildIOT11:55:342
2021172994239,2cyclictest2273614-21kworker/u8:0+flush-179:012:15:331
2021172994238,3cyclictest2098611-21kworker/u8:5+flush-179:008:35:071
2021172994230,11cyclictest247516-21Chrome_ChildIOT10:55:141
2021169994231,9cyclictest3125599-21python310:20:490
2021169994224,16cyclictest2068060-21kworker/u8:0+flush-179:008:34:380
2021175994137,3cyclictest2166311-21kworker/u8:0+flush-179:010:30:163
2021175994136,4cyclictest2104646-21/usr/share/muni08:30:023
2021175994131,9cyclictest1340669-1kworker/3:0H+kblockd09:33:343
2021175994117,23cyclictest2124890-21kworker/u8:0+flush-179:009:04:093
2021173994139,1cyclictest2269965-21kworker/2:1+pm11:17:392
2021173994139,1cyclictest2269965-21kworker/2:1+pm11:17:392
2021173994139,1cyclictest2181658-21kworker/2:0+pm09:50:532
2021173994138,2cyclictest2020793-21kworker/2:1+pm09:29:172
2021173994137,3cyclictest2207786-21/usr/share/muni10:10:172
2021173994137,2cyclictest2020793-21kworker/2:1+pm07:36:382
2021172994138,2cyclictest2310906-21kworker/u8:2+flush-179:011:50:211
2021172994137,3cyclictest2140166-21kworker/u8:1+flush-179:009:05:321
2021172994136,4cyclictest247561-21ThreadPoolForeg10:37:191
2021172994131,9cyclictest2065044-21ntpq07:50:171
2021172994125,15cyclictest1929990-1kworker/1:0H+kblockd07:30:031
2021169994135,4cyclictest2243031-1kworker/0:1H+kblockd11:18:280
2021169994135,4cyclictest2243031-1kworker/0:1H+kblockd11:18:280
2021169994131,8cyclictest2243031-1kworker/0:1H+kblockd10:55:030
2021175994036,3cyclictest2146097-21/usr/share/muni09:10:163
2021175994036,3cyclictest2004978-21kworker/u8:2+flush-179:007:25:293
2021173994038,1cyclictest2181658-21kworker/2:0+pm09:56:222
2021173994037,2cyclictest2269965-21kworker/2:1+pm11:11:342
2021173994037,2cyclictest2181658-21kworker/2:0+pm10:19:402
2021173994037,2cyclictest2020793-21kworker/2:1+pm09:36:502
2021173994037,2cyclictest2020793-21kworker/2:1+pm09:15:202
2021173994037,2cyclictest2020793-21kworker/2:1+pm09:15:202
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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