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2026-04-08 - 15:05
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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 rackdslot0.osadl.org (updated Wed Apr 08, 2026 00:45:58)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2172499230,5cyclictest0-21swapper/123:19:471
2171999236,16cyclictest0-21swapper/019:11:120
21719992214,3cyclictest0-21swapper/000:27:370
2171999220,6cyclictest0-21swapper/021:47:190
2171999210,4cyclictest0-21swapper/022:55:000
2171999210,1cyclictest0-21swapper/023:57:020
2172899203,11cyclictest0-21swapper/222:31:342
2172499202,11cyclictest13866-21python300:40:011
2172499202,11cyclictest13866-21python300:40:001
2172499200,19cyclictest2488-21/usr/sbin/munin23:20:191
21719992019,0cyclictest0-21swapper/000:20:130
2171999200,3cyclictest0-21swapper/019:27:040
2172899192,6cyclictest0-21swapper/220:56:242
2172899192,16cyclictest16755-21snapd20:45:482
21728991917,1cyclictest0-21swapper/221:32:172
21728991917,1cyclictest0-21swapper/220:12:312
2172499193,15cyclictest5495-21ntp_kernel_err19:35:221
2172499192,2cyclictest28172-21http_loadtime19:20:151
21724991914,3cyclictest4099-21H222:10:211
2171999194,14cyclictest0-21swapper/022:40:290
2171999192,16cyclictest17922-21cut20:00:010
21719991917,1cyclictest0-21swapper/022:39:010
2171999190,3cyclictest0-21swapper/021:34:140
2172899182,1cyclictest367-21latency22:20:162
2172899182,15cyclictest61282chrt23:26:242
2172899182,15cyclictest20738-21cpu20:05:142
2172899182,15cyclictest0-21swapper/222:02:032
21728991815,2cyclictest14841-21nfsd422:45:172
2172899181,16cyclictest2971-21fschecks_time20:30:152
2172899180,2cyclictest3707-21master23:12:332
2172899180,17cyclictest455-21plymouthd20:50:172
2172899180,17cyclictest28875-21nvmesmart_nvme021:15:182
2172499182,1cyclictest0-21swapper/119:31:531
21724991816,1cyclictest21-21ksoftirqd/123:42:501
21724991816,1cyclictest0-21swapper/122:35:501
21724991816,1cyclictest0-21swapper/119:45:131
21724991815,2cyclictest19770-21grep21:00:141
21724991815,2cyclictest16304-21cut22:50:001
2172499181,2cyclictest7925-21grep23:30:151
2172499180,17cyclictest28874-21smartctl21:15:181
21719991816,1cyclictest12495-21nfsd400:35:190
21719991816,1cyclictest12495-21nfsd400:35:190
21719991816,1cyclictest0-21swapper/019:40:000
21719991815,2cyclictest13420-21latency19:50:160
2171999181,2cyclictest32563-21chrt23:15:340
2171999180,17cyclictest28613-21cron20:20:000
21728991716,1cyclictest28-21ksoftirqd/222:08:122
21728991715,2cyclictest0-21swapper/219:45:132
21728991715,1cyclictest0-21swapper/222:35:562
21728991715,1cyclictest0-21swapper/220:40:212
21728991714,2cyclictest8252-21wc23:30:182
21728991714,2cyclictest7273-21cpuspeed_turbos19:40:142
21728991714,2cyclictest6780-21pzem_current20:35:202
21728991714,2cyclictest3434-21ls00:20:112
21728991714,2cyclictest30661-21missed_timers00:10:162
21728991714,2cyclictest27885-21mailstats20:15:212
21728991714,2cyclictest24203-21sessionclean21:09:012
21728991714,2cyclictest19771-21fschecks_time21:00:142
21728991714,2cyclictest16748-21snapd21:22:482
21728991714,2cyclictest1386-21ntpq00:15:172
21728991714,2cyclictest0-21swapper/219:10:192
21728991713,1cyclictest0-21swapper/220:00:152
2172899170,2cyclictest993-21dbus-daemon23:05:022
2172899170,2cyclictest28828-21ntp_kernel_pll_19:20:182
2172899170,2cyclictest11659-21idleruntime22:40:152
2172899170,1cyclictest0-21swapper/223:55:172
2172899170,16cyclictest993-21dbus-daemon21:40:212
2172899170,16cyclictest9272-21chrt21:39:162
2172899170,16cyclictest6155-21cat00:25:142
2172899170,16cyclictest31794-21apache_volume20:25:132
2172899170,16cyclictest31592-21nvmesmart_nvme019:25:202
2172899170,16cyclictest25929-21chrt00:01:492
2172899170,16cyclictest24683-21latency_hist23:05:012
2172899170,16cyclictest18971-21latency21:55:152
2172899170,16cyclictest17605-21cut22:50:172
2172899170,16cyclictest16749-21snapd00:07:482
2172899170,16cyclictest1216-21fschecks_time19:30:172
2172899170,16cyclictest10033-21apache_volume23:35:122
2172899170,16cyclictest0-21swapper/222:15:192
2172899170,16cyclictest0-21swapper/221:25:212
2172499172,1cyclictest21-21ksoftirqd/120:52:341
2172499172,14cyclictest0-21swapper/121:49:151
21724991715,1cyclictest0-21swapper/100:25:141
21724991714,2cyclictest9159-21fschecks_count00:30:141
21724991714,2cyclictest3867-21chrt00:20:131
21724991714,2cyclictest28439-21expr23:10:141
21724991714,2cyclictest27623-21awk22:10:171
21724991714,2cyclictest24837-21grep21:10:131
21724991714,2cyclictest20694-21/usr/sbin/munin22:00:121
21724991714,2cyclictest17962-21cron23:50:001
21724991714,2cyclictest12413-21pzem_energy20:45:201
21724991712,2cyclictest20905-21grep20:05:131
2172499171,1cyclictest572-21nfsd420:25:191
2172499171,1cyclictest0-21swapper/122:18:501
2172499170,2cyclictest399-20systemd-journal23:05:021
2172499170,2cyclictest3976-21H222:10:211
2172499170,2cyclictest31591-21smartctl19:25:201
2172499170,2cyclictest16755-21snapd00:07:491
2172499170,1cyclictest3989-21H222:10:211
2172499170,16cyclictest8391-21cut20:40:131
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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