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2026-07-22 - 16:40
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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
Compare latency of primary with shadow system
Characteristics of the 50 highest latencies:
System rackeslot6.osadl.org (updated Wed Jul 22, 2026 12:44:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
222012999135125,7cyclictest2266177-21latency_hist09:30:011
222012799133124,6cyclictest2244346-21kworker/u8:1+flush-179:008:40:200
222012999130120,7cyclictest2314740-21latency_hist12:00:011
222012999123115,5cyclictest2252672-21apt-get08:50:021
222012999122110,9cyclictest1213033-21systemd-journal10:30:011
222012999122110,9cyclictest1213033-21systemd-journal10:30:011
222012799122111,8cyclictest2244445-21latency_hist08:25:000
222012999121112,6cyclictest2252672-21apt-get08:50:001
222012999121110,7cyclictest2306518-21apt-get11:35:001
222012799116109,5cyclictest2257739-21kworker/u8:3+flush-179:009:50:200
222012799115103,9cyclictest2300132-21latency_hist11:15:010
222012799113104,6cyclictest2279221-21kworker/u8:0+flush-179:011:20:160
22201299911098,9cyclictest2264631-21gpgv09:25:001
22201299911098,8cyclictest1213033-21systemd-journal12:35:011
222012799108100,6cyclictest2234652-21kworker/u8:3+flush-179:008:05:220
22201279910784,20cyclictest2293762-21latency_hist10:55:010
222012799105100,3cyclictest2303312-21kworker/u8:1+flush-179:011:30:110
22201299910494,8cyclictest2259803-21apt-get09:10:091
22201299910395,5cyclictest2269889-21apt-get09:40:101
22201279910395,5cyclictest2257680-21kworker/u8:0+flush-179:009:05:150
22201279910395,5cyclictest2213973-21kworker/u8:3+flush-179:007:20:200
22201299910292,7cyclictest2272807-21latency_hist09:50:011
22201279910295,5cyclictest2321377-21kworker/u8:0+flush-179:012:30:210
22201279910295,5cyclictest2303312-21kworker/u8:1+flush-179:011:35:170
22201279910195,4cyclictest2218515-21kworker/u8:2+events_unbound07:20:000
22201279910194,5cyclictest2290568-21kworker/u8:2+flush-179:011:25:160
22201299910093,5cyclictest2324295-21latency_hist12:30:011
22201299910090,7cyclictest2316338-21latency_hist12:05:021
22201279910093,5cyclictest2213973-21kworker/u8:3+flush-179:007:35:160
22201279910089,8cyclictest2247618-21latency_hist08:35:020
2220129999988,8cyclictest2228478-21apt-get07:35:121
2220129999987,9cyclictest1213033-21systemd-journal07:15:261
2220127999992,5cyclictest2239408-21kworker/u8:2+flush-179:008:10:240
2220127999991,5cyclictest2239408-21kworker/u8:2+flush-179:008:20:020
2220129999889,6cyclictest2215684-21kworker/u8:0+flush-179:007:10:251
2220127999891,5cyclictest2218515-21kworker/u8:2+flush-179:007:50:010
2220127999787,8cyclictest2317903-21kworker/u8:3+events_unbound12:10:000
2220127999690,4cyclictest2279221-21kworker/u8:0+flush-179:010:35:240
2220127999688,5cyclictest2257739-21kworker/u8:3+flush-179:009:35:180
2220129999589,5cyclictest2303312-21kworker/u8:1+flush-179:011:40:001
2220127999587,5cyclictest2257739-21kworker/u8:3+events_unbound10:10:230
2220129999487,5cyclictest2321377-21kworker/u8:0+flush-179:012:30:201
2220129999385,5cyclictest2312721-21kworker/u8:2+flush-179:012:05:241
2220127999387,4cyclictest2304956-21kworker/u8:0+events_unbound11:50:010
2220127999386,5cyclictest2244346-21kworker/u8:1+flush-179:008:50:140
2220129999280,9cyclictest1213033-21systemd-journal11:20:011
2220127999285,5cyclictest2287371-21kworker/u8:1+flush-179:010:40:230
2220129999181,6cyclictest2244346-21kworker/u8:1+flush-179:008:35:221
2220129999084,4cyclictest2213973-21kworker/u8:3+flush-179:007:20:151
2220127999085,3cyclictest1-21systemd12:40:010
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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