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2026-06-23 - 18:26
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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 highest latencies:
System rackdslot0.osadl.org (updated Tue Jun 23, 2026 12:46:02)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
4142992213,6cyclictest22949-21nfsd412:25:170
414299220,21cyclictest843-21systemd-network11:17:180
415199214,8cyclictest0-21swapper/208:40:512
4151992016,3cyclictest0-21swapper/209:50:132
415199200,6cyclictest0-21swapper/207:12:252
415199200,11cyclictest0-21swapper/209:15:552
415199200,11cyclictest0-21swapper/209:15:552
414799204,15cyclictest0-21swapper/110:53:211
414799203,16cyclictest25154-21taskset10:35:571
414799203,11cyclictest9385-21munin-run12:05:011
414799202,3cyclictest3706-21cron11:55:001
4147992018,1cyclictest0-21swapper/111:35:121
414799200,19cyclictest843-21systemd-network08:33:171
415199192,3cyclictest0-21swapper/211:07:272
4151991917,1cyclictest22245-21timerandwakeup10:30:212
4151991917,1cyclictest22245-21timerandwakeup10:30:212
4151991917,1cyclictest0-21swapper/212:20:172
415199191,2cyclictest0-21swapper/210:45:142
415199190,2cyclictest0-21swapper/208:54:432
415199190,2cyclictest0-21swapper/208:54:432
414799192,16cyclictest23810-21wc09:40:001
4147991917,1cyclictest0-21swapper/111:58:011
4147991917,1cyclictest0-21swapper/110:11:001
414799190,5cyclictest0-21swapper/107:40:351
414799190,4cyclictest843-21systemd-network11:03:531
414799190,18cyclictest11878-21switchtime09:15:211
414799190,18cyclictest11878-21switchtime09:15:211
414799190,18cyclictest0-21swapper/111:23:251
414799190,0cyclictest0-21swapper/110:55:191
4142991917,1cyclictest0-21swapper/007:22:240
4142991916,2cyclictest2069-21systemd-udevd09:12:520
4142991914,1cyclictest0-21swapper/008:45:210
414299190,2cyclictest3991-21H222:10:210
4151991816,1cyclictest0-21swapper/211:50:172
415199181,16cyclictest17668-21smtpd12:15:272
415199180,16cyclictest31575-21python308:00:022
414799182,15cyclictest0-21swapper/107:50:041
4147991816,1cyclictest0-21swapper/112:21:071
4147991816,1cyclictest0-21swapper/109:50:141
4147991815,2cyclictest8388-21cstates11:05:111
4147991814,3cyclictest2007-21systemd-journal10:15:221
414799180,17cyclictest24339-21sshd11:30:281
414799180,17cyclictest15093-21nfsd411:15:161
414299182,15cyclictest22362-21nfsd409:35:180
4142991814,3cyclictest3985-21H222:10:210
4142991814,3cyclictest30858-21munin-run08:55:020
4142991814,3cyclictest30858-21munin-run08:55:010
414299181,16cyclictest12280-21grep11:10:190
414299181,16cyclictest1100-21snmpd10:35:550
414299180,1cyclictest0-21swapper/012:22:450
414299180,17cyclictest15627-21fschecks_count10:20:140
4151991715,1cyclictest9410-21users09:10:222
4151991715,1cyclictest25109-21apache_processe11:35:112
4151991714,2cyclictest6962-21apache_volume12:00:122
4151991714,2cyclictest6163-21idleruntime11:00:152
4151991714,2cyclictest5568-21latency09:05:142
4151991714,2cyclictest5120-21irqstats11:55:142
4151991714,2cyclictest4200-21/usr/sbin/munin10:55:202
4151991714,2cyclictest3985-21H222:10:212
4151991714,2cyclictest26181-21sed07:50:012
4151991714,2cyclictest26067-21apache_volume10:40:092
4151991714,2cyclictest23160-21apache_accesses10:35:122
4151991714,2cyclictest22195-21memory09:35:172
4151991714,2cyclictest21341-21ntp_offset08:35:192
4151991714,2cyclictest20856-21mailstats11:25:192
4151991714,2cyclictest16531-21apache_accesses11:20:092
4151991714,2cyclictest14468-21hddtemp_smartct11:15:132
4151991714,2cyclictest1274-21runrttasks12:25:452
4151991714,2cyclictest11307-21cstates11:10:152
4151991714,2cyclictest10002-21cpuspeed_turbos07:20:142
415199171,1cyclictest26757-21chrt09:45:102
415199170,2cyclictest7628-21cat07:15:142
415199170,2cyclictest7566-21readlink08:10:212
415199170,2cyclictest399-20systemd-journal08:49:552
415199170,2cyclictest29059-21munin-plugin-st07:55:012
415199170,2cyclictest2435-21munin-run10:00:002
415199170,2cyclictest20036-21chrt07:35:272
415199170,2cyclictest14481-21timerwakeupswit07:25:212
415199170,16cyclictest9796-21dpkg12:05:012
415199170,16cyclictest624-21grep11:50:002
415199170,16cyclictest3738-21idleruntime08:05:152
415199170,16cyclictest32637-21hddtemp_smartct10:50:152
415199170,16cyclictest27458-21apache_volume12:35:122
415199170,16cyclictest2690-21apache_processe10:00:112
415199170,16cyclictest24759-21expr12:30:132
415199170,16cyclictest2169-21fschecks_count09:00:132
415199170,16cyclictest18426-21apache_accesses09:30:112
415199170,16cyclictest18282-21expr10:25:152
415199170,16cyclictest15706-21apache_processe09:25:132
415199170,16cyclictest15475-21cpuspeed_turbos07:30:142
4147991715,1cyclictest0-21swapper/108:25:011
4147991715,1cyclictest0-21swapper/108:25:011
4147991714,2cyclictest8761-21switchtime07:15:211
4147991714,2cyclictest8526-21munin-run08:15:011
4147991714,2cyclictest7190-21cat10:05:161
4147991714,2cyclictest455-21plymouthd12:10:131
4147991714,2cyclictest3985-21H222:10:211
4147991714,2cyclictest3954-21VM22:10:211
4147991714,2cyclictest3758-21idleruntime08:05:151
4147991714,2cyclictest3415-21fschecks_count10:00:141
4147991714,2cyclictest2156-21taskset09:59:111
4147991714,2cyclictest18583-21grep09:30:131
4147991714,2cyclictest16881-21strings09:25:181
4147991714,2cyclictest10152-21proc_pri08:15:201
4147991714,1cyclictest0-21swapper/108:55:161
414799170,2cyclictest4989-21expr09:05:111
414799170,2cyclictest3450-21gsd-color10:20:221
414799170,2cyclictest31575-21python308:00:001
414799170,2cyclictest25757-21chrt07:46:401
414799170,2cyclictest21495-21ls10:30:171
414799170,2cyclictest21495-21ls10:30:171
414799170,2cyclictest19537-21timerandwakeup10:25:231
414799170,1cyclictest0-21swapper/112:25:171
414799170,16cyclictest32325-21apache_volume08:00:131
414799170,16cyclictest32045-21grep11:45:191
414799170,16cyclictest29512-21sh10:45:161
414799170,16cyclictest28946-21postgres09:48:271
414799170,16cyclictest27295-21gpg-connect-age12:35:001
414799170,16cyclictest20413-21cat08:35:141
414799170,16cyclictest1761-21systemd09:42:521
414799170,16cyclictest14571-21postgres07:25:251
414799170,16cyclictest11478-21systemctl07:20:201
414799170,16cyclictest1100-21snmpd11:42:211
414799170,16cyclictest0-21swapper/110:40:171
414799170,0cyclictest0-21swapper/112:30:171
414299172,1cyclictest0-21swapper/007:17:190
4142991716,1cyclictest0-21swapper/010:50:130
4142991715,1cyclictest24891-21cat09:40:150
4142991715,1cyclictest18522-21chrt11:20:550
4142991715,1cyclictest0-21swapper/012:10:180
4142991715,1cyclictest0-21swapper/009:46:210
4142991714,2cyclictest9573-21expr10:10:140
4142991714,2cyclictest3979-21H222:10:210
4142991714,2cyclictest3464-21postgres11:52:570
4142991714,2cyclictest16179-21switchtime08:25:230
4142991714,2cyclictest16179-21switchtime08:25:230
4142991714,2cyclictest15110-21munin-plugin-st07:30:000
4142991714,2cyclictest12576-21basename10:15:170
4142991713,3cyclictest870-21systemd-logind09:23:520
414299171,15cyclictest314032sleep007:59:200
414299170,16cyclictest5796-21store10:05:010
414299170,16cyclictest4023-21PluginScanner11:27:410
414299170,16cyclictest3980-21H222:10:210
414299170,16cyclictest3598-21fschecks_count08:05:160
414299170,16cyclictest32315-21grep08:55:160
414299170,16cyclictest30202-21ntp_states10:45:210
414299170,16cyclictest29849-21cat11:40:200
414299170,16cyclictest29306-21cupsd11:47:550
414299170,16cyclictest27640-21netstat07:50:180
414299170,16cyclictest26036-21munin-run07:50:010
414299170,16cyclictest24948-21cat11:35:010
414299170,16cyclictest24432-21pzem_current08:40:190
414299170,16cyclictest22577-21sendmail_mailtr07:40:210
414299170,16cyclictest21363-21nvmesmart_nvme008:35:200
414299170,16cyclictest20769-21cat10:30:130
414299170,16cyclictest20769-21cat10:30:130
414299170,16cyclictest17124-21awk09:25:200
414299170,16cyclictest14506-21snapd10:00:280
414299170,16cyclictest1274-21runrttasks10:40:190
4151991614,1cyclictest0-21swapper/211:30:012
4151991614,1cyclictest0-21swapper/210:05:012
4151991614,1cyclictest0-21swapper/209:40:132
4151991614,1cyclictest0-21swapper/209:20:072
4151991614,1cyclictest0-21swapper/208:30:122
4151991614,1cyclictest0-21swapper/208:20:132
4151991614,1cyclictest0-21swapper/207:40:172
4151991613,2cyclictest14352-21invoke-rc.d08:25:012
4151991613,2cyclictest14352-21invoke-rc.d08:25:012
415199160,1cyclictest589-21fschecks_time08:00:152
415199160,15cyclictest27988-21/usr/sbin/munin11:40:162
415199160,15cyclictest12860-21memory10:15:182
415199160,15cyclictest0-21swapper/212:10:172
415199160,15cyclictest0-21swapper/208:55:152
415199160,15cyclictest0-21swapper/208:15:032
4147991615,1cyclictest21-21ksoftirqd/111:25:081
4147991614,1cyclictest0-21swapper/112:15:151
4147991614,1cyclictest0-21swapper/109:20:071
4147991614,1cyclictest0-21swapper/109:10:131
4147991614,1cyclictest0-21swapper/108:20:101
4147991614,1cyclictest0-21swapper/107:10:161
414799160,1cyclictest0-21swapper/111:10:181
414799160,1cyclictest0-21swapper/108:50:211
414799160,1cyclictest0-21swapper/108:50:211
414799160,15cyclictest2686-21sed09:00:161
414799160,15cyclictest24314-21ntp_states08:40:181
414799160,15cyclictest175892chrt07:34:141
414799160,15cyclictest0-21swapper/107:35:131
4142991614,1cyclictest0-21swapper/011:00:170
4142991614,1cyclictest0-21swapper/010:55:120
4142991614,1cyclictest0-21swapper/009:50:130
4142991614,1cyclictest0-21swapper/007:10:210
414299160,2cyclictest8147-21apache_volume11:05:100
414299160,2cyclictest566-21/usr/sbin/munin08:00:150
414299160,2cyclictest11509-21ls08:20:130
414299160,2cyclictest11000-21/usr/sbin/munin09:15:150
414299160,2cyclictest11000-21/usr/sbin/munin09:15:150
414299160,1cyclictest0-21swapper/009:55:160
414299160,1cyclictest0-21swapper/008:30:180
414299160,15cyclictest9813-21find12:05:010
414299160,15cyclictest9603-21irqstats08:15:170
414299160,15cyclictest6811-21cat08:10:160
414299160,15cyclictest18706-21tune2fs07:35:140
414299160,15cyclictest16747-21latency12:15:150
414299160,15cyclictest15989-21grep07:30:160
414299160,15cyclictest0-21swapper/011:55:130
414299160,15cyclictest0-21swapper/010:25:150
414299160,15cyclictest0-21swapper/009:30:190
414299160,15cyclictest0-21swapper/009:00:090
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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