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2026-08-09 - 09:24
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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 Sun Aug 09, 2026 00:46:04)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1956899240,18cyclictest0-21swapper/122:04:381
1956899231,21cyclictest5809-21cat21:35:151
1956999220,18cyclictest0-21swapper/222:15:162
1956899222,1cyclictest5245-21chrt23:28:041
19568992214,7cyclictest15376-21apache_processe22:50:121
19568992214,7cyclictest15376-21apache_processe22:50:121
19568992214,7cyclictest10238-21apache_processe00:35:121
1956899220,3cyclictest6932-21tr20:40:131
1956899220,2cyclictest3450-21gsd-color20:55:141
1956899220,2cyclictest19526-21cut22:00:011
1956899220,21cyclictest27730-21expr20:20:141
1956899220,1cyclictest26898-21ntpq00:05:201
1956899220,1cyclictest26898-21ntpq00:05:201
1956899220,1cyclictest0-21swapper/123:00:211
1956899220,1cyclictest0-21swapper/120:25:151
1956899220,1cyclictest0-21swapper/100:01:001
1956899220,17cyclictest4282-21sort19:39:011
1956899220,16cyclictest32436-21awk19:30:171
1956899220,16cyclictest31531-21http_loadtime22:20:171
1956899220,16cyclictest0-21swapper/119:25:161
1956899220,15cyclictest2640-21irqstats00:20:161
1956899220,15cyclictest20074-21apt-get21:05:011
1956899220,15cyclictest0-21swapper/119:45:151
19569992115,5cyclictest19315-21python323:55:012
1956899212,1cyclictest3989-21H222:10:211
19568992114,6cyclictest23020-21df22:05:131
19568992114,6cyclictest18426-21expr22:55:131
19568992114,6cyclictest14898-21cat20:55:011
19568992114,6cyclictest0-21swapper/121:30:151
19568992114,6cyclictest0-21swapper/120:00:201
19568992114,6cyclictest0-21swapper/119:50:191
19568992113,7cyclictest631-21apt-key20:30:021
19568992113,7cyclictest27305-21cat21:15:161
19568992113,7cyclictest14974-21munin-plugin-st22:50:001
1956899211,1cyclictest0-21swapper/121:20:141
1956899210,2cyclictest19331-21http23:55:011
1956899210,2cyclictest15000-21sed19:55:211
1956899210,20cyclictest30273-21timerandwakeup00:10:211
1956899210,20cyclictest14504-21snapd23:12:581
1956899210,20cyclictest0-21swapper/123:45:141
1956899210,1cyclictest0-21swapper/123:36:171
1956899210,1cyclictest0-21swapper/121:40:151
1956899210,1cyclictest0-21swapper/119:45:001
1956899210,1cyclictest0-21swapper/100:30:221
1956899210,1cyclictest0-21swapper/100:30:221
1956899210,16cyclictest5176-21grep20:35:191
1956899210,16cyclictest3987-21H222:10:211
1956899210,16cyclictest28626-21cstates22:15:141
1956899210,15cyclictest121472chrt22:44:231
1956899210,15cyclictest0-21swapper/123:55:141
1956899210,15cyclictest0-21swapper/123:05:171
1956899210,14cyclictest0-21swapper/121:10:171
1956999200,19cyclictest0-21swapper/219:55:162
19568992015,4cyclictest0-21swapper/121:28:401
19568992014,5cyclictest0-21swapper/123:20:121
19568992014,5cyclictest0-21swapper/121:50:181
1956899200,1cyclictest12146-21grep21:45:141
1956899200,1cyclictest0-21swapper/123:30:151
1956899200,19cyclictest0-21swapper/122:25:171
1956899200,19cyclictest0-21swapper/122:10:151
1956899200,18cyclictest0-21swapper/123:15:131
1956899200,18cyclictest0-21swapper/123:15:131
1956899200,15cyclictest0-21swapper/120:05:161
1956899200,14cyclictest0-21swapper/123:40:181
1956899200,14cyclictest0-21swapper/123:40:181
1956899200,14cyclictest0-21swapper/120:10:241
1956899200,0cyclictest0-21swapper/120:48:531
19569991916,2cyclictest30938-21expr23:15:192
19569991916,2cyclictest30938-21expr23:15:182
19569991914,2cyclictest3989-21H222:10:212
19568991911,2cyclictest20150-21ls19:10:151
19568991911,1cyclictest0-21swapper/121:00:211
1956899190,18cyclictest0-21swapper/120:15:181
1956899190,18cyclictest0-21swapper/119:20:171
1956899190,18cyclictest0-21swapper/100:15:141
1956899190,14cyclictest0-21swapper/100:25:561
19567991917,1cyclictest0-21swapper/023:04:040
19567991917,1cyclictest0-21swapper/021:17:040
19569991816,1cyclictest18728-21grep22:55:142
19569991815,2cyclictest3204-21JS22:10:212
19569991815,2cyclictest28257-21cat21:15:222
19569991815,2cyclictest24171-21ntpq00:00:192
1956999181,16cyclictest0-21swapper/222:00:212
1956999180,1cyclictest0-21swapper/219:50:242
1956999180,17cyclictest27405-21cpuspeed_turbos20:20:132
1956999180,17cyclictest0-21swapper/220:30:022
1956899180,0cyclictest0-21swapper/122:36:131
1956799183,14cyclictest0-21swapper/022:25:150
1956799182,15cyclictest9-21ksoftirqd/020:38:170
1956799182,15cyclictest21315-21cat21:05:140
19567991816,1cyclictest321042chrt19:30:160
19567991816,1cyclictest17422-21nfsd420:00:210
19567991815,2cyclictest4099-21H222:10:210
19567991815,2cyclictest26616-21tlsmgr00:16:170
1956799181,3cyclictest0-21swapper/021:25:200
1956799180,3cyclictest3985-21H222:10:210
1956799180,3cyclictest13205-21grep19:55:010
1956799180,17cyclictest426-21systemd-udevd21:58:520
1956799180,17cyclictest399-20systemd-journal20:35:000
1956799180,16cyclictest27439-21tr20:20:130
19569991715,1cyclictest240922sleep220:14:392
19569991715,1cyclictest0-21swapper/200:39:212
19569991715,1cyclictest0-21swapper/200:05:222
19569991715,1cyclictest0-21swapper/200:05:222
19569991714,2cyclictest7355-21cut00:30:002
19569991714,2cyclictest25093-21pzem_current23:05:212
19569991714,2cyclictest13308-21missed_timers20:50:182
19569991714,2cyclictest12071-21df_inode21:45:142
19569991714,1cyclictest0-21swapper/219:35:152
1956999171,1cyclictest0-21swapper/200:10:162
1956999171,15cyclictest31839-21expr00:15:152
1956999170,2cyclictest773-21grep21:25:192
1956999170,2cyclictest2872-21systemd-logind22:38:522
1956999170,2cyclictest20901-21apache_processe21:05:112
1956999170,2cyclictest16588-21mailstats20:55:212
1956999170,2cyclictest14495-21snapd22:10:282
1956999170,2cyclictest11262-21awk20:45:232
1956999170,2cyclictest0-21swapper/223:35:152
1956999170,1cyclictest0-21swapper/223:43:002
1956999170,1cyclictest0-21swapper/223:43:002
1956999170,16cyclictest7911-21cat00:30:132
1956999170,16cyclictest7911-21cat00:30:132
1956999170,16cyclictest7232-21nvmesmart_nvme023:30:212
1956999170,16cyclictest4470-21latency_hist00:25:002
1956999170,16cyclictest4462-21expr20:35:142
1956999170,16cyclictest32620-21expr23:20:122
1956999170,16cyclictest32350-21wc22:20:222
1956999170,16cyclictest30676-21tune2fs20:25:162
1956999170,16cyclictest29408-21cat23:15:002
1956999170,16cyclictest25159-21ntp_kernel_pll_21:10:192
1956999170,16cyclictest24008-21cat19:15:172
1956999170,16cyclictest20481-21cstates23:55:142
1956999170,16cyclictest20154-21nfsd420:05:182
1956999170,16cyclictest16585-21nfsd422:50:182
1956999170,16cyclictest16585-21nfsd422:50:182
1956999170,16cyclictest13250-21fschecks_count22:45:152
1956999170,16cyclictest10300-21munin-run19:50:002
1956999170,16cyclictest0-21swapper/223:00:222
1956999170,16cyclictest0-21swapper/222:05:162
1956999170,16cyclictest0-21swapper/219:13:022
19567991715,1cyclictest0-21swapper/023:15:130
19567991715,1cyclictest0-21swapper/023:15:130
19567991714,2cyclictest993-21dbus-daemon19:45:010
19567991714,2cyclictest9119-21df23:35:150
19567991714,2cyclictest8201-21ntp_states20:40:200
19567991714,2cyclictest6075-21timerandwakeup22:30:210
19567991714,2cyclictest4236-21sh19:39:000
19567991714,2cyclictest3991-21H222:10:210
19567991714,2cyclictest25704-21ls22:10:160
19567991714,2cyclictest23001-21grep00:00:140
19567991714,2cyclictest14893-21awk19:55:200
19567991714,2cyclictest13038-21mailstats23:40:210
19567991714,2cyclictest13038-21mailstats23:40:210
19567991714,1cyclictest0-21swapper/021:40:180
1956799171,1cyclictest0-21swapper/022:57:550
1956799171,15cyclictest6137-21cat23:30:150
1956799171,15cyclictest4315-21run-parts21:30:210
1956799171,15cyclictest0-21swapper/022:50:130
1956799171,15cyclictest0-21swapper/022:50:130
1956799171,15cyclictest0-21swapper/020:05:140
1956799170,2cyclictest4099-21H222:10:210
1956799170,2cyclictest399-20systemd-journal00:10:360
1956799170,2cyclictest3987-21H222:10:210
1956799170,2cyclictest3979-21H222:10:210
1956799170,2cyclictest3413-21expr23:25:130
1956799170,2cyclictest20311-21cat23:55:140
1956799170,2cyclictest11547-21ls21:45:130
1956799170,1cyclictest0-21swapper/023:13:380
1956799170,16cyclictest6849-21ntp_states21:35:220
1956799170,16cyclictest4841-21/usr/sbin/munin19:40:130
1956799170,16cyclictest4369-21perf00:25:000
1956799170,16cyclictest32344-21apache_accesses23:20:100
1956799170,16cyclictest30874-21cat22:20:150
1956799170,16cyclictest2872-21systemd-logind22:02:520
1956799170,16cyclictest25539-21apache_volume00:05:140
1956799170,16cyclictest25539-21apache_volume00:05:140
1956799170,16cyclictest24816-21nfsd423:05:190
1956799170,16cyclictest21347-21processes19:10:220
1956799170,16cyclictest16889-21latency_hist23:50:010
1956799170,16cyclictest16496-21cron23:50:010
1956799170,16cyclictest10388-21cat20:45:170
1956799170,16cyclictest1035-21thermald00:30:200
1956799170,16cyclictest1035-21thermald00:30:200
1956799170,16cyclictest0-21swapper/022:15:030
1956799170,15cyclictest0-21swapper/021:24:170
19569991614,1cyclictest10812-21irqstats22:40:172
19569991614,1cyclictest0-21swapper/223:45:182
19569991614,1cyclictest0-21swapper/221:50:092
19569991614,1cyclictest0-21swapper/221:30:212
19569991614,1cyclictest0-21swapper/220:40:142
19569991614,1cyclictest0-21swapper/220:00:242
1956999160,1cyclictest3983-21H222:10:212
1956999160,1cyclictest2443-21nfsd422:25:202
1956999160,1cyclictest0-21swapper/221:35:172
1956999160,1cyclictest0-21swapper/219:25:202
1956999160,15cyclictest30438-21netstat21:20:182
1956999160,15cyclictest0-21swapper/223:25:102
1956999160,15cyclictest0-21swapper/221:00:142
1956999160,15cyclictest0-21swapper/219:20:142
19567991614,1cyclictest0-21swapper/021:10:160
19567991614,1cyclictest0-21swapper/019:20:170
19567991614,1cyclictest0-21swapper/000:25:150
19567991613,2cyclictest15395-21cat20:55:140
19567991613,2cyclictest14211-21apache_accesses21:50:080
1956799160,1cyclictest0-21swapper/020:15:170
1956799160,1cyclictest0-21swapper/019:25:160
1956799160,15cyclictest12834-21df20:50:150
1956799160,15cyclictest12819-21cut22:45:130
1956799160,15cyclictest0-21swapper/022:40:140
1956799160,15cyclictest0-21swapper/000:35:130
19569991514,1cyclictest32373-21strings19:30:172
19569991513,1cyclictest0-21swapper/221:40:012
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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