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2026-08-04 - 17:26
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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 376 highest latencies:
System rackdslot0.osadl.org (updated Tue Aug 04, 2026 12:45:55)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
32650993430,1cyclictest0-21swapper/008:25:000
3265099230,22cyclictest17234-21python307:40:010
3265599220,18cyclictest0-21swapper/112:33:551
3265099220,4cyclictest0-21swapper/009:50:080
3265099220,21cyclictest0-21swapper/011:31:070
32659992119,1cyclictest1100-21snmpd10:25:122
32659992014,3cyclictest0-21swapper/210:49:042
3265999201,18cyclictest26157-21nfsd408:50:192
3265099200,17cyclictest0-21swapper/008:09:560
3265999192,15cyclictest0-21swapper/210:44:492
32659991916,2cyclictest3976-21H222:10:212
32659991914,3cyclictest0-21swapper/209:26:472
3265999191,17cyclictest7763-21fschecks_time12:05:152
3265999190,4cyclictest24560-21perf11:39:592
3265999190,16cyclictest3991-21H222:10:212
3265599194,1cyclictest0-21swapper/108:20:171
32655991916,2cyclictest24298-21tr09:45:131
3265599190,2cyclictest3979-21H222:10:211
3265099193,15cyclictest9-21ksoftirqd/009:38:280
3265099193,15cyclictest9-21ksoftirqd/009:38:270
32650991916,2cyclictest9-21ksoftirqd/009:25:140
3265999183,15cyclictest28-21ksoftirqd/211:41:502
32659991816,1cyclictest11607-21ls08:25:162
32659991816,1cyclictest0-21swapper/212:29:022
32659991816,1cyclictest0-21swapper/209:14:252
32659991814,3cyclictest3987-21H222:10:212
3265999181,16cyclictest993-21dbus-daemon12:20:002
3265999181,16cyclictest9022-21smtpd09:19:322
3265999180,3cyclictest3813-21cpuspeed_turbos07:15:152
3265999180,2cyclictest4099-21H222:10:212
3265999180,2cyclictest3989-21H222:10:212
3265999180,17cyclictest3991-21H222:10:212
3265999180,16cyclictest3989-21H222:10:212
3265599183,1cyclictest0-21swapper/108:05:141
3265599182,1cyclictest203632sleep112:28:481
3265599182,1cyclictest15472-21mailstats11:20:221
3265599182,15cyclictest7772-21latency09:15:181
3265599182,15cyclictest12273-21nfsd408:25:211
3265599182,15cyclictest0-21swapper/108:30:171
32655991816,1cyclictest21-21ksoftirqd/111:02:191
32655991816,1cyclictest0-21swapper/110:06:591
32655991816,1cyclictest0-21swapper/107:15:431
32655991815,2cyclictest14775-21cat10:25:141
32655991814,3cyclictest3985-21H222:10:211
32655991813,2cyclictest3983-21H222:10:211
3265599181,16cyclictest25797-21sed10:45:001
3265599181,16cyclictest0-21swapper/108:45:171
3265599180,2cyclictest3981-21H222:10:211
3265599180,17cyclictest26257-21cut11:40:201
3265599180,16cyclictest3989-21H222:10:211
3265599180,16cyclictest19791-21python310:35:001
32650991815,2cyclictest4904-21grep07:15:190
32650991814,3cyclictest6788-21cpu09:15:140
32650991814,3cyclictest29053-21apache212:05:110
32650991814,3cyclictest28147-21smtp07:56:210
32650991814,3cyclictest0-21swapper/010:40:340
3265099180,3cyclictest3976-21H222:10:210
3265099180,2cyclictest3979-21H222:10:210
3265099180,2cyclictest3976-21H222:10:210
3265099180,1cyclictest4035-21H222:10:210
3265099180,17cyclictest3991-21H222:10:210
3265099180,17cyclictest14715-21smtp12:16:230
3265099180,17cyclictest0-21swapper/011:00:000
3265099180,17cyclictest0-21swapper/010:45:470
3265099180,16cyclictest3976-21H222:10:210
3265099180,15cyclictest3991-21H222:10:210
32659991715,1cyclictest0-21swapper/210:16:482
32659991714,2cyclictest8714-21http_loadtime08:20:172
32659991714,2cyclictest7954-21cut08:20:012
32659991714,2cyclictest6586-21grep07:20:152
32659991714,2cyclictest4099-21H222:10:212
32659991714,2cyclictest3981-21H222:10:212
32659991714,2cyclictest20697-21grep10:35:152
32659991714,2cyclictest19154-21latency09:35:192
32659991714,2cyclictest19154-21latency09:35:182
32659991714,2cyclictest18596-21fschecks_count07:40:172
32659991714,2cyclictest17386-21/usr/sbin/munin10:30:182
32659991714,2cyclictest10109-21grep12:10:132
32659991713,3cyclictest4099-21H222:10:212
3265999170,2cyclictest9909-21processes11:10:182
3265999170,2cyclictest6733-21nfsd411:05:192
3265999170,2cyclictest4099-21H222:10:212
3265999170,2cyclictest3985-21H222:10:212
3265999170,2cyclictest31937-21pzem_power09:00:212
3265999170,2cyclictest16681-21cut09:30:192
3265999170,1cyclictest3981-21H222:10:212
3265999170,1cyclictest0-21swapper/209:20:132
3265999170,16cyclictest3985-21H222:10:212
3265999170,16cyclictest3981-21H222:10:212
3265999170,16cyclictest3981-21H222:10:212
3265999170,16cyclictest32005-21/usr/sbin/munin10:55:182
3265999170,16cyclictest26392-21cstates07:55:142
3265999170,16cyclictest22099-21nvmesmart_nvme007:45:212
3265999170,16cyclictest20999-21pzem_current08:40:202
3265999170,16cyclictest2048-21pzem10:00:222
3265999170,16cyclictest2007-21systemd-journal11:53:082
3265999170,16cyclictest17930-21nfsd411:25:192
3265999170,16cyclictest15631-21cpuspeed_turbos12:20:142
3265999170,16cyclictest0-21swapper/208:40:022
3265599172,1cyclictest0-21swapper/111:09:461
32655991715,1cyclictest7205-21idleruntime07:20:161
32655991715,1cyclictest62352sleep109:13:441
32655991714,2cyclictest455-21plymouthd09:05:151
32655991714,2cyclictest4507-21expr12:00:131
32655991714,2cyclictest3991-21H222:10:211
32655991714,2cyclictest3981-21H222:10:211
32655991714,2cyclictest29311-21grep10:50:121
32655991714,2cyclictest28780-21missed_timers08:55:181
32655991714,2cyclictest24132-21http_loadtime07:50:151
32655991714,2cyclictest21385-21fschecks_time07:45:181
32655991714,2cyclictest19381-21taskset07:40:211
32655991714,2cyclictest19354-21apache_volume11:30:121
32655991714,2cyclictest15100-21expr07:35:141
32655991714,2cyclictest11946-21apache_accesses10:20:111
3265599171,15cyclictest27860-21expr11:45:121
3265599170,3cyclictest0-21swapper/108:10:051
3265599170,2cyclictest7673-21cut10:10:181
3265599170,2cyclictest4099-21H222:10:211
3265599170,2cyclictest3987-21H222:10:211
3265599170,2cyclictest30441-21apache_volume11:50:131
3265599170,2cyclictest18220-21switchtime08:35:221
3265599170,2cyclictest15385-21/usr/sbin/munin09:30:111
3265599170,16cyclictest4099-21H222:10:211
3265599170,16cyclictest3987-21H222:10:211
3265599170,16cyclictest3981-21H222:10:211
3265599170,16cyclictest3976-21H222:10:211
3265599170,16cyclictest3976-21H222:10:211
3265599170,16cyclictest32372-21taskset09:00:401
3265599170,16cyclictest31053-21sendmail-mta08:03:281
3265599170,16cyclictest3087-21postgres09:40:241
3265599170,16cyclictest25448-21cstates08:50:141
3265599170,16cyclictest18837-21hddtemp_smartct09:35:171
3265599170,16cyclictest18837-21hddtemp_smartct09:35:171
3265599170,16cyclictest17906-21nfsd411:25:191
3265599170,16cyclictest1448-21if_enp1s007:10:161
3265599170,16cyclictest13899-21awk09:25:201
3265599170,16cyclictest10430-21expr12:10:141
3265599170,15cyclictest3985-21H222:10:211
3265599170,15cyclictest3979-21H222:10:211
32650991715,1cyclictest0-21swapper/012:30:030
32650991714,2cyclictest5133-21sed09:10:190
32650991714,2cyclictest4035-21H222:10:210
32650991714,2cyclictest3981-21H222:10:210
32650991714,2cyclictest3981-21H222:10:210
32650991714,2cyclictest3954-21VM22:10:210
32650991714,2cyclictest29300-21grep08:55:220
32650991714,2cyclictest27686-21find11:45:100
32650991714,2cyclictest14550-21snapd07:43:070
32650991714,2cyclictest14219-21perf07:35:010
32650991714,2cyclictest10041-21cpuspeed_turbos12:10:130
32650991713,3cyclictest3991-21H222:10:210
3265099170,2cyclictest993-21dbus-daemon10:20:200
3265099170,2cyclictest5527-21apache_processe11:05:120
3265099170,2cyclictest3991-21H222:10:210
3265099170,2cyclictest3985-21H222:10:210
3265099170,2cyclictest24207-21if_eno107:50:160
3265099170,2cyclictest2230-21ntpq09:05:210
3265099170,2cyclictest2202-21apache_volume08:10:140
3265099170,2cyclictest18581-21apt-config08:36:300
3265099170,2cyclictest15697-21timerandwakeup11:20:240
3265099170,2cyclictest0-21swapper/008:40:130
3265099170,1cyclictest0-21swapper/009:00:220
3265099170,16cyclictest6495-21cut08:15:190
3265099170,16cyclictest455-21plymouthd09:30:250
3265099170,16cyclictest4035-21H222:10:210
3265099170,16cyclictest3985-21H222:10:210
3265099170,16cyclictest3985-21H222:10:210
3265099170,16cyclictest3983-21H222:10:210
3265099170,16cyclictest30126-21grep08:00:190
3265099170,16cyclictest25224-21expr08:50:150
3265099170,16cyclictest23123-21uname08:45:160
3265099170,16cyclictest1079-21cups-browsed07:45:230
3265099170,16cyclictest10445-21taskset07:25:190
3265099170,15cyclictest3989-21H222:10:210
32659991614,1cyclictest0-21swapper/210:50:172
32659991614,1cyclictest0-21swapper/208:55:162
32659991614,1cyclictest0-21swapper/208:30:142
32659991614,1cyclictest0-21swapper/208:00:162
3265999160,2cyclictest12559-21fschecks_time07:30:152
3265999160,15cyclictest31607-21apache_accesses08:05:112
3265999160,15cyclictest22440-21grep08:45:122
3265999160,15cyclictest0-21swapper/211:30:162
3265999160,15cyclictest0-21swapper/211:15:132
3265999160,15cyclictest0-21swapper/209:05:162
3265999160,15cyclictest0-21swapper/208:10:152
3265999160,15cyclictest0-21swapper/207:50:152
3265999160,15cyclictest0-21swapper/207:10:132
32655991614,1cyclictest13625-21grep07:30:221
32655991614,1cyclictest0-21swapper/108:40:141
32655991614,1cyclictest0-21swapper/107:25:161
3265599160,15cyclictest27004-21if_lxdbr007:55:171
3265599160,15cyclictest0-21swapper/108:15:211
32650991614,1cyclictest11641-21df08:25:170
32650991614,1cyclictest0-21swapper/010:25:180
3265099160,1cyclictest0-21swapper/009:55:180
3265099160,15cyclictest9110-21hddtemp_smartct11:10:130
3265099160,15cyclictest678-21cpuspeed_turbos07:10:140
3265099160,15cyclictest6467-21apt-get10:10:120
3265099160,15cyclictest3450-21gsd-color11:40:150
3265099160,15cyclictest3387-21apache_volume10:05:100
3265099160,15cyclictest0-21swapper/012:00:170
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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