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2026-03-26 - 23:53
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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 (updated Thu Mar 26, 2026 12:45:53)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
19177993524,0cyclictest0-21swapper/111:04:401
1917399263,19cyclictest3020-21sed11:25:000
1917799230,20cyclictest29616-21cron11:15:001
19173992323,0cyclictest29678-21mii-tool12:10:150
1917399220,6cyclictest6598-21tr08:40:120
1918299217,13cyclictest0-21swapper/207:19:392
1918299210,5cyclictest28-21ksoftirqd/210:14:212
1917799210,1cyclictest111rcu_preempt09:21:421
19173992116,5cyclictest0-21swapper/009:55:000
1917399210,20cyclictest0-21swapper/010:10:120
19182992014,5cyclictest271rcuc/209:45:012
1918299200,17cyclictest4099-21H222:10:212
19177992018,1cyclictest21-21ksoftirqd/107:58:281
19177992016,2cyclictest21-21ksoftirqd/109:45:011
1917799200,19cyclictest0-21swapper/110:10:201
1917399200,19cyclictest0-21swapper/011:17:460
1917399200,18cyclictest0-21swapper/008:12:300
1918299193,15cyclictest0-21swapper/209:13:192
1918299190,16cyclictest3981-21H222:10:212
1917799194,1cyclictest21-21ksoftirqd/109:00:231
1917799193,15cyclictest21-21ksoftirqd/112:10:121
19177991918,1cyclictest21-21ksoftirqd/112:30:491
19177991918,1cyclictest21-21ksoftirqd/108:35:211
1917799190,16cyclictest3983-21H222:10:211
19173991917,1cyclictest0-21swapper/011:13:370
19173991914,4cyclictest0-21swapper/010:30:180
1917399190,18cyclictest0-21swapper/010:45:100
1918299182,15cyclictest28-21ksoftirqd/209:20:182
19182991818,0cyclictest0-21swapper/212:30:502
19182991818,0cyclictest0-21swapper/209:04:162
19182991816,1cyclictest28-21ksoftirqd/208:55:002
19182991816,1cyclictest0-21swapper/210:47:412
19182991813,1cyclictest0-21swapper/207:50:132
1918299181,16cyclictest5538-21cstates12:25:132
1918299181,16cyclictest29713-21nfsd410:15:182
1918299181,15cyclictest0-21swapper/211:30:122
1918299180,3cyclictest16999-21cut10:50:192
1918299180,2cyclictest11476-21idleruntime-cro11:40:002
1918299180,17cyclictest6467-21grep09:35:132
1918299180,17cyclictest23855-21smtp08:11:272
1917799182,15cyclictest21-21ksoftirqd/112:25:131
1917799182,15cyclictest21-21ksoftirqd/111:30:181
1917799182,15cyclictest21-21ksoftirqd/107:24:361
19177991816,1cyclictest21-21ksoftirqd/111:50:121
19177991816,1cyclictest21-21ksoftirqd/110:45:221
19177991816,1cyclictest21-21ksoftirqd/107:25:281
19177991815,2cyclictest647-21timerwakeupswit10:20:221
19177991814,3cyclictest16755-21snapd11:17:491
19177991814,3cyclictest0-21swapper/110:32:061
1917799180,2cyclictest3976-21H222:10:211
1917799180,17cyclictest6468-21fschecks_count09:35:141
1917799180,15cyclictest3983-21H222:10:211
1917799180,15cyclictest3981-21H222:10:211
1917799180,15cyclictest0-21swapper/108:18:061
19173991816,1cyclictest0-21swapper/011:45:210
1917399180,2cyclictest3981-21H222:10:210
1917399180,2cyclictest3976-21H222:10:210
1918299172,1cyclictest28-21ksoftirqd/211:50:152
19182991715,1cyclictest28-21ksoftirqd/210:00:122
19182991715,1cyclictest0-21swapper/208:03:112
19182991714,2cyclictest685-21expr08:30:132
19182991714,2cyclictest19809-21expr07:10:132
19182991714,2cyclictest1375-21munin-node11:15:102
19182991714,1cyclictest0-21swapper/212:10:152
19182991712,3cyclictest32664-21latency_hist08:30:002
1918299171,15cyclictest28-21ksoftirqd/207:40:212
1918299171,15cyclictest28-21ksoftirqd/207:35:132
1918299170,2cyclictest3976-21H222:10:212
1918299170,2cyclictest31947-21fschecks_time10:20:142
1918299170,2cyclictest27539-21grep08:20:142
1918299170,2cyclictest22631-21date12:00:012
1918299170,2cyclictest2007-21systemd-journal08:17:012
1918299170,1cyclictest0-21swapper/211:20:152
1918299170,16cyclictest4546-21nvmesmart_nvme009:30:212
1918299170,16cyclictest28562-21package-data-do07:25:012
1918299170,16cyclictest17078-21latency_hist11:50:002
1918299170,16cyclictest1525-21lxd12:20:412
1918299170,16cyclictest1517-21lxd12:02:412
1918299170,16cyclictest12565-21grep09:45:172
1918299170,16cyclictest12118-21sendmail_mailtr12:35:192
1918299170,16cyclictest11112-21idleruntime10:40:152
1917799172,15cyclictest21-21ksoftirqd/108:42:221
19177991716,1cyclictest21-21ksoftirqd/110:00:161
19177991715,1cyclictest172252sleep108:59:031
19177991714,2cyclictest2608-21cat07:35:141
19177991714,2cyclictest24261-21ntpq10:05:171
19177991714,2cyclictest21417-21expr09:05:131
19177991714,2cyclictest21-21ksoftirqd/109:15:191
19177991714,2cyclictest20064-21/usr/sbin/munin11:55:171
1917799170,2cyclictest20166-21awk08:05:171
1917799170,2cyclictest13957-21switchtime08:50:211
1917799170,2cyclictest11359-21fschecks_count07:50:151
1917799170,2cyclictest0-21swapper/112:35:131
1917799170,1cyclictest4099-21H222:10:211
1917799170,1cyclictest21-21ksoftirqd/112:09:201
1917799170,1cyclictest111rcu_preempt11:07:401
1917799170,16cyclictest29671-21date08:25:011
1917799170,16cyclictest1746-21sshd09:27:001
1917799170,16cyclictest1684-21egrep10:25:121
1917799170,16cyclictest16360-21cat11:45:221
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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