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2026-04-08 - 14:21
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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 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
2172499170,16cyclictest6564-21cat21:35:011
2172499170,16cyclictest5871-21fschecks_count20:35:141
2172499170,16cyclictest455-21plymouthd21:25:171
2172499170,16cyclictest4267-21/usr/sbin/munin20:30:221
2172499170,16cyclictest30845-21grep20:20:221
2172499170,16cyclictest26160-21proc_pri19:15:191
2172499170,16cyclictest25196-21grep20:10:221
2172499170,16cyclictest24850-21ntp_states22:05:191
2172499170,16cyclictest20619-21pzem_current22:55:191
2172499170,16cyclictest17868-21sed20:55:211
2172499170,16cyclictest14805-21munin-run19:55:011
2172499170,16cyclictest11369-21systemctl21:40:211
2172499170,16cyclictest0-21swapper/123:55:131
2172499170,15cyclictest0-21swapper/122:22:231
21719991716,1cyclictest32418-21cupsd00:06:000
21719991715,1cyclictest0-21swapper/023:45:160
21719991715,1cyclictest0-21swapper/023:30:140
21719991715,1cyclictest0-21swapper/020:23:180
21719991714,2cyclictest4680-21expr23:25:150
21719991714,2cyclictest399-20systemd-journal23:05:000
21719991714,2cyclictest3976-21H222:10:210
21719991714,2cyclictest30965-21ntp_kernel_err00:10:170
21719991714,2cyclictest27033-21idleruntime-cro19:20:000
21719991714,2cyclictest26002-21munin-run20:15:000
21719991714,2cyclictest21117-21expr20:05:130
21719991714,2cyclictest11544-21fschecks_time20:45:150
2171999170,2cyclictest908-21expr21:25:130
2171999170,2cyclictest3044-21hddtemp_smartct22:25:160
2171999170,2cyclictest3044-21hddtemp_smartct22:25:160
2171999170,2cyclictest29049-21plymouth19:20:200
2171999170,2cyclictest22698-21/usr/sbin/munin21:05:160
2171999170,2cyclictest16755-21snapd22:57:220
2171999170,1cyclictest0-21swapper/022:30:180
2171999170,16cyclictest8640-21expr20:40:140
2171999170,16cyclictest455-21plymouthd23:40:010
2171999170,16cyclictest30638-21expr21:20:130
2171999170,16cyclictest30157-21chrt23:14:530
2171999170,16cyclictest25005-21egrep23:05:140
2171999170,16cyclictest24889-21cut21:10:130
2171999170,16cyclictest20974-21sed23:55:010
2171999170,16cyclictest18617-21fschecks_count20:00:150
2171999170,16cyclictest11391-21wc19:45:210
21728991614,1cyclictest0-21swapper/221:50:192
21728991614,1cyclictest0-21swapper/200:30:132
21728991613,2cyclictest26855-21expr22:10:122
21728991613,2cyclictest14432-21users21:45:212
2172899160,2cyclictest14143-21nfsd423:40:172
2172899160,1cyclictest0-21swapper/223:50:192
2172899160,1cyclictest0-21swapper/219:35:202
2172899160,15cyclictest29160-21cpuspeed_turbos20:20:142
2172899160,15cyclictest26159-21ps19:15:192
2172899160,15cyclictest15807-21/usr/sbin/munin19:55:152
2172899160,15cyclictest12571-21cpuspeed_turbos19:50:132
2172899160,15cyclictest0-21swapper/223:45:162
2172899160,15cyclictest0-21swapper/223:20:162
2172899160,15cyclictest0-21swapper/223:15:142
2172899160,15cyclictest0-21swapper/222:55:142
2172899160,15cyclictest0-21swapper/222:25:122
2172899160,15cyclictest0-21swapper/222:25:122
2172899160,15cyclictest0-21swapper/221:10:152
2172899160,15cyclictest0-21swapper/200:35:162
2172899160,15cyclictest0-21swapper/200:35:152
21724991614,1cyclictest202142sleep120:04:171
21724991614,1cyclictest0-21swapper/122:40:141
21724991614,1cyclictest0-21swapper/121:55:121
21724991613,2cyclictest1441-21sendmail-mta19:10:081
2172499160,2cyclictest31192-21sendmail_mailtr00:10:191
2172499160,1cyclictest0-21swapper/123:50:141
2172499160,1cyclictest0-21swapper/122:50:121
2172499160,1cyclictest0-21swapper/122:25:191
2172499160,1cyclictest0-21swapper/122:25:191
2172499160,1cyclictest0-21swapper/121:20:131
2172499160,15cyclictest4220-21expr21:30:131
2172499160,15cyclictest4202-21cpuspeed_turbos23:25:141
2172499160,15cyclictest25883-21cron20:15:011
2172499160,15cyclictest23156-21grep23:00:181
2172499160,15cyclictest15903-21fschecks_time21:50:121
2172499160,15cyclictest0-21swapper/122:30:191
2172499160,15cyclictest0-21swapper/119:55:141
2172499160,15cyclictest0-21swapper/100:15:191
2172499160,15cyclictest0-21swapper/100:05:001
21719991614,1cyclictest26594-21cstates22:10:120
21719991614,1cyclictest17060-21/usr/sbin/munin20:55:170
21719991614,1cyclictest13641-21apt-get22:45:120
21719991614,1cyclictest0-21swapper/021:00:200
21719991614,1cyclictest0-21swapper/020:50:140
21719991614,1cyclictest0-21swapper/019:40:220
21719991614,1cyclictest0-21swapper/000:15:100
21719991613,2cyclictest13868-21cut23:40:160
21719991613,2cyclictest10446-21grep21:40:150
2171999160,1cyclictest0-21swapper/020:25:170
2171999160,15cyclictest940-21/usr/sbin/munin23:20:110
2171999160,15cyclictest914-21expr19:30:150
2171999160,15cyclictest6059-21apt-get21:35:020
2171999160,15cyclictest3012-21smartctl20:30:150
2171999160,15cyclictest23463-21grep22:05:130
2171999160,15cyclictest21798-21missed_timers22:00:160
2171999160,15cyclictest18785-21/usr/sbin/munin21:55:140
2171999160,15cyclictest0-21swapper/022:20:130
2171999160,15cyclictest0-21swapper/022:15:150
2171999160,15cyclictest0-21swapper/021:50:110
2171999160,15cyclictest0-21swapper/021:15:120
2171999160,15cyclictest0-21swapper/000:30:130
2171999160,15cyclictest0-21swapper/000:00:160
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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