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2025-12-10 - 18:35
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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 10, 2025 12:44:36)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
21182772207184,13sleep10-21swapper/107:09:351
21181982194167,18sleep20-21swapper/207:08:352
21182912186171,7sleep30-21swapper/307:09:453
21181392168141,18sleep00-21swapper/007:07:500
2118680998579,3cyclictest3125721-21chrome11:45:022
2118676997871,5cyclictest2363440-21/usr/share/muni11:05:021
2118676997871,5cyclictest2363440-21/usr/share/muni11:05:021
2118671997222,15cyclictest2280235-21chrome09:45:000
211867199654,60cyclictest2155903-21chrome07:45:010
2118680996358,4cyclictest247561-21ThreadPoolForeg11:25:292
2118671995953,4cyclictest2384081-21/usr/share/muni11:25:160
24221102570,2sleep2247557-21chrome12:00:192
2118680995753,3cyclictest2196740-21latency_hist08:25:002
2118671995749,6cyclictest2186134-21kworker/u8:1+events_unbound09:25:140
2118671995651,4cyclictest2446030-21/usr/share/muni12:25:170
2118683995551,3cyclictest2129329-31munin-html07:15:413
2118680995536,18cyclictest2243559-21kworker/u8:0+flush-179:010:25:002
21812682540,1sleep30-21swapper/308:09:103
211867699541,52cyclictest2300213-31munin-graph10:01:431
2118683995348,4cyclictest247560-21ThreadPoolForeg10:55:243
2118676995349,3cyclictest2102956-21kworker/u8:3+flush-179:007:50:191
2118676995349,3cyclictest2102956-21kworker/u8:3+flush-179:007:50:181
2118671995246,5cyclictest3125725-21ThreadPoolForeg09:05:300
2118671995246,4cyclictest2321732-21/usr/share/muni10:25:100
2118683995146,4cyclictest2150746-21/usr/share/muni07:40:093
2118680995145,5cyclictest3125688-21Chrome_ChildIOT08:05:412
2118680995144,5cyclictest2249058-21/usr/share/muni09:15:112
2118671995147,3cyclictest2140253-21munin-update07:30:330
2118680994933,14cyclictest2393678-31munin-graph11:30:522
2118676994945,3cyclictest2155915-21/usr/share/muni07:45:141
2118683994844,3cyclictest2087165-21kworker/u8:1+events_unbound08:00:003
211868099480,2cyclictest2349769-21ntpq10:50:172
2118676994845,2cyclictest2253738-21kworker/u8:4+flush-179:009:20:141
2118676994844,3cyclictest2374982-21apt-get11:15:121
2118683994743,3cyclictest2186134-21kworker/u8:1+events_unbound09:05:093
2118680994731,4cyclictest2285387-21/usr/share/muni09:50:052
2118671994740,6cyclictest3125688-21Chrome_ChildIOT10:10:010
2118671994733,2cyclictest2043024-1kworker/0:2H+kblockd07:17:390
2118683994643,2cyclictest2388087-21kworker/u8:1+flush-179:012:17:043
2118683994641,4cyclictest2342619-21CacheThread_Blo10:45:013
2118683994632,2cyclictest2170325-1kworker/3:0H+kblockd12:31:233
2118680994643,2cyclictest2253737-21kworker/u8:3+flush-179:009:55:182
2118680994642,3cyclictest2199113-21kworker/u8:6+flush-179:008:50:192
2118680994641,4cyclictest2150309-21kworker/u8:0+flush-179:008:29:592
2118683994542,2cyclictest2253737-21kworker/u8:3+flush-179:009:55:133
2118680994523,13cyclictest247563-13Compositor07:45:002
2118676994540,4cyclictest76405-21systemd-journal12:38:161
2118671994543,1cyclictest2043024-1kworker/0:2H+kblockd12:13:100
2118683994440,3cyclictest2341977-21kworker/u8:3+flush-179:011:52:463
2118683994439,4cyclictest2196371-31munin-graph08:20:493
2118683994430,13cyclictest2170325-1kworker/3:0H+kblockd09:44:393
2118683994430,13cyclictest2170325-1kworker/3:0H+kblockd09:44:393
2118680994440,3cyclictest2243559-21kworker/u8:0+flush-179:009:44:332
2118680994440,3cyclictest2243559-21kworker/u8:0+flush-179:009:44:332
2118680994439,3cyclictest2233758-21/usr/share/muni09:00:042
2118676994441,2cyclictest3125708-13Chrome_ChildIOT10:43:021
2118676994439,4cyclictest2243947-21/usr/share/muni09:10:101
2118676994439,4cyclictest2197268-21/usr/share/muni08:25:041
2118676994439,4cyclictest2123256-31munin-html07:10:361
2118676994431,2cyclictest1068850-1kworker/1:0H+kblockd11:45:251
2118671994439,3cyclictest2362977-21kworker/u8:5+flush-179:011:05:330
2118671994438,5cyclictest3125688-21Chrome_ChildIOT08:40:010
2118683994340,2cyclictest2388087-21kworker/u8:1+flush-179:012:35:283
2118676994341,2cyclictest1068850-1kworker/1:0H+kblockd08:13:401
2118676994334,2cyclictest1068850-1kworker/1:0H+kblockd09:35:291
2118671994338,3cyclictest2326579-21munin-update10:30:050
2118671994336,5cyclictest3125725-21ThreadPoolForeg11:12:450
211867199431,41cyclictest3125629-21e21169fc69a4c6708:40:110
211867199431,41cyclictest3125629-21e21169fc69a4c6708:40:110
2118671994310,31cyclictest3125721-21chrome10:55:310
2118683994239,2cyclictest2368168-21kworker/u8:0+flush-179:011:20:153
2118683994239,2cyclictest2102956-21kworker/u8:3+flush-179:007:45:563
2118683994238,3cyclictest2440679-21munin-update12:20:343
2118680994237,4cyclictest2341977-21kworker/u8:3+flush-179:011:50:312
2118680994237,4cyclictest2326822-21/usr/share/muni10:30:092
2118680994225,2cyclictest2295383-21kworker/u8:1+flush-179:010:55:182
2118676994239,2cyclictest2368168-21kworker/u8:0+flush-179:011:10:321
2118671994238,3cyclictest2299748-21kworker/u8:2+flush-179:010:40:010
2118671994236,4cyclictest2087165-21kworker/u8:1+flush-179:007:36:080
211867199420,41cyclictest247573-21ThreadPoolForeg08:20:100
2118683994137,3cyclictest2295383-21kworker/u8:1+flush-179:010:07:333
2118683994121,18cyclictest2368698-21/usr/share/muni11:10:123
211868099419,32cyclictest1260-21snmpd11:02:062
211868099419,32cyclictest1260-21snmpd11:02:062
2118680994138,2cyclictest99884-21rs:main2
2118680994137,3cyclictest2341977-21kworker/u8:3+flush-179:011:05:342
2118671994137,3cyclictest2435256-21kworker/u8:2+flush-179:012:17:390
2118671994136,4cyclictest2202770-21/usr/share/muni08:30:110
2118671994135,4cyclictest247515-21ThreadPoolForeg12:22:390
2118683994036,3cyclictest2341977-21kworker/u8:3+flush-179:011:55:093
2118683994035,4cyclictest2285259-21latency_hist09:50:013
2118683994034,4cyclictest2424563-21munin-limits12:00:363
2118680994038,1cyclictest2097838-21kworker/2:1+pm07:38:322
2118680994037,2cyclictest2373221-21kworker/2:1+pm11:12:042
2118680994037,2cyclictest2097838-21kworker/2:1+pm09:39:472
2118680994037,2cyclictest2097838-21kworker/2:1+pm09:33:192
2118680994036,3cyclictest2243559-21kworker/u8:0+flush-179:010:01:172
2118680994035,4cyclictest2171401-21/usr/share/muni08:00:062
2118680994035,3cyclictest2087165-21kworker/u8:1+events_unbound07:31:542
2118680994033,5cyclictest2430645-21/usr/share/muni12:10:022
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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