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2026-05-03 - 13:26
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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 Sun May 03, 2026 00:45:58)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3210099230,18cyclictest0-21swapper/200:25:182
3210099212,13cyclictest0-21swapper/219:42:522
3208999210,17cyclictest0-21swapper/021:20:010
32100992017,2cyclictest10078-21cron22:20:002
32100992015,3cyclictest0-21swapper/222:35:192
32100992015,3cyclictest0-21swapper/222:35:182
32095992014,3cyclictest0-21swapper/100:05:191
3208999204,15cyclictest21357-21grep23:35:150
3210099194,1cyclictest0-21swapper/223:20:172
3210099194,1cyclictest0-21swapper/223:03:132
3210099193,15cyclictest17365-21timerandwakeup20:35:212
32095991917,1cyclictest0-21swapper/119:55:131
32095991916,2cyclictest14893-21http_loadtime00:20:151
32095991915,3cyclictest0-21swapper/120:44:311
3209599190,18cyclictest843-21systemd-network21:55:161
3209599190,16cyclictest11350-21apache_volume19:30:131
32089991916,1cyclictest0-21swapper/019:25:570
3208999190,18cyclictest11365-21cat21:25:000
3210099183,1cyclictest0-21swapper/219:38:492
3210099182,15cyclictest22255-21chrt23:35:202
3210099182,15cyclictest0-21swapper/223:30:152
32100991815,2cyclictest26249-21sendmail-mta20:54:452
32100991814,3cyclictest0-21swapper/221:35:202
3210099180,3cyclictest24805-21python319:55:002
3210099180,17cyclictest3261-21nfsd422:05:182
3209599180,17cyclictest3987-21H222:10:211
3209599180,17cyclictest0-21swapper/119:50:121
3208999183,15cyclictest9-21ksoftirqd/020:00:180
32089991815,2cyclictest14830-21needreboot22:25:160
3208999180,17cyclictest5601-21lxd22:14:500
3208999180,17cyclictest16751-21latency_hist21:35:020
32100991714,2cyclictest9503-21tr23:15:122
32100991714,2cyclictest6346-21cpuspeed_turbos21:15:152
32100991714,2cyclictest3989-21H222:10:212
32100991714,2cyclictest387-21nvmesmart_nvme022:00:182
32100991714,2cyclictest27352-21nvmesmart_nvme021:50:212
32100991714,2cyclictest27241-21munin-plugin-st22:50:002
32100991714,2cyclictest23899-21grep21:45:152
32100991714,2cyclictest23899-21grep21:45:142
32100991714,2cyclictest16953-21cat21:35:012
32100991714,2cyclictest1517-21lxd22:32:492
32100991714,2cyclictest14499-21snapd22:10:462
32100991714,2cyclictest1079-21cups-browsed23:10:212
32100991714,2cyclictest1079-21cups-browsed23:05:212
32100991714,2cyclictest10685-21chrt19:27:012
32100991714,2cyclictest0-21swapper/219:10:172
3210099171,2cyclictest32275-21taskset22:56:522
3210099171,15cyclictest29558-21chrt22:52:032
3210099170,2cyclictest5775-21chrt21:14:482
3210099170,2cyclictest31910-21chrt21:01:432
3210099170,2cyclictest2569-21kernelversion20:10:172
3210099170,2cyclictest10716-21expr20:25:122
3210099170,16cyclictest7444-21apache_processe20:20:102
3210099170,16cyclictest6314-21fschecks_time00:05:162
3210099170,16cyclictest5439-21cat19:19:552
3210099170,16cyclictest27882-21grep20:00:012
3210099170,16cyclictest26709-21apache_volume23:45:122
3210099170,16cyclictest24617-21sort00:39:012
3210099170,16cyclictest20968-21ntp_kernel_err00:30:172
3210099170,16cyclictest10151-21lxd23:40:342
32095991715,1cyclictest0-21swapper/120:10:161
32095991714,2cyclictest8261-21expr22:15:141
32095991714,2cyclictest32603-21apache_processe21:05:131
32095991714,2cyclictest31558-21expr20:05:141
32095991714,2cyclictest20324-21latency_hist21:40:001
32095991714,2cyclictest15854-21nvmesmart_nvme021:30:181
32095991714,2cyclictest14550-21snapd21:45:271
32095991714,2cyclictest14550-21snapd21:45:271
32095991714,2cyclictest10587-21expr20:25:111
32095991714,2cyclictest0-21swapper/100:00:041
3209599171,2cyclictest18954-21smartctl23:30:191
32095991711,3cyclictest0-21swapper/121:10:181
3209599170,2cyclictest3985-21H222:10:211
3209599170,2cyclictest29087-21sed21:00:001
3209599170,2cyclictest22484-21expr22:40:131
3209599170,2cyclictest16136-21latency_hist22:30:011
3209599170,2cyclictest14599-21ls19:35:141
3209599170,2cyclictest13660-21taskset21:25:291
3209599170,16cyclictest9691-21ls23:15:131
3209599170,16cyclictest7016-21missed_timers19:20:171
3209599170,16cyclictest32640-21nfsd422:00:171
3209599170,16cyclictest25511-21pzem_power20:50:201
3209599170,16cyclictest23240-21python323:40:011
3209599170,16cyclictest16980-21/usr/sbin/munin19:40:111
3209599170,16cyclictest12857-21apt-get22:25:001
3209599170,16cyclictest11839-21apache221:20:111
32089991715,1cyclictest0-21swapper/000:09:300
32089991714,2cyclictest863-21avahi-daemon23:05:200
32089991714,2cyclictest31591-21expr20:05:150
32089991714,2cyclictest22809-21expr19:50:140
32089991714,2cyclictest19849-21apt-get23:35:000
32089991714,2cyclictest19571-21latency_hist19:45:010
32089991714,2cyclictest13098-21ntp_offset21:25:180
32089991714,2cyclictest1229-21grep23:00:120
3208999171,1cyclictest18792-21grep21:35:190
3208999171,15cyclictest3987-21H222:10:210
3208999171,15cyclictest0-21swapper/000:13:450
3208999170,2cyclictest32005-21chrt21:03:000
3208999170,2cyclictest21854-21sshd19:48:000
3208999170,2cyclictest19854-21sed22:35:150
3208999170,2cyclictest19854-21sed22:35:140
3208999170,2cyclictest1515-21lxd00:24:340
3208999170,16cyclictest9927-21latency_hist20:25:010
3208999170,16cyclictest4054-21expr21:10:140
3208999170,16cyclictest27662-21cpuspeed_turbos22:50:130
3208999170,16cyclictest22124-21sed21:40:210
3208999170,16cyclictest21064-21proc_pri00:30:200
3208999170,16cyclictest1829-21systemd-journal22:07:380
3208999170,16cyclictest13638-21sendmail_mailst23:20:210
3208999170,16cyclictest12084-21pzem_voltage22:20:200
3208999170,16cyclictest11216-21missed_timers20:25:150
32100991614,1cyclictest14699-21timerandwakeup20:30:232
32100991614,1cyclictest11957-21fschecks_count19:30:142
32100991614,1cyclictest0-21swapper/221:20:172
32100991614,1cyclictest0-21swapper/220:55:132
32100991614,1cyclictest0-21swapper/220:05:132
32100991614,1cyclictest0-21swapper/220:00:132
32100991614,1cyclictest0-21swapper/219:45:142
32100991614,1cyclictest0-21swapper/200:15:212
32100991614,1cyclictest0-21swapper/200:10:142
32100991613,2cyclictest22764-21http_loadtime22:40:142
3210099161,1cyclictest30003-21nfsd421:55:172
3210099160,1cyclictest0-21swapper/221:25:122
3210099160,15cyclictest7940-21chrt19:21:402
3210099160,15cyclictest4668-21/usr/sbin/munin20:15:132
3210099160,15cyclictest2161-21timerwakeupswit21:05:222
3210099160,15cyclictest14879-21cpuspeed_turbos23:25:122
3210099160,15cyclictest13551-21dpkg22:25:032
3210099160,15cyclictest0-21swapper/223:55:212
3210099160,15cyclictest0-21swapper/223:50:142
3210099160,15cyclictest0-21swapper/222:20:182
3210099160,15cyclictest0-21swapper/221:40:162
3210099160,15cyclictest0-21swapper/220:45:152
3210099160,15cyclictest0-21swapper/200:00:132
32095991614,1cyclictest23994-21cpu23:40:111
32095991614,1cyclictest15156-21ls23:25:111
32095991614,1cyclictest14536-21switchtime20:30:221
32095991614,1cyclictest12154-21grep23:20:121
32095991614,1cyclictest0-21swapper/123:00:141
32095991614,1cyclictest0-21swapper/122:55:151
32095991614,1cyclictest0-21swapper/121:40:121
32095991614,1cyclictest0-21swapper/119:27:131
32095991614,1cyclictest0-21swapper/100:30:161
32095991613,2cyclictest9892-21date20:25:001
32095991613,2cyclictest27357-21fschecks_time23:45:131
3209599160,1cyclictest0-21swapper/120:45:161
3209599160,15cyclictest8805-21cpuspeed_turbos00:10:141
3209599160,15cyclictest2465-21fschecks_count22:05:151
3209599160,15cyclictest22753-21expr00:35:131
3209599160,15cyclictest17460-21timerwakeupswit20:35:221
3209599160,15cyclictest0-21swapper/123:50:131
3209599160,15cyclictest0-21swapper/122:54:591
3209599160,15cyclictest0-21swapper/122:45:141
3209599160,15cyclictest0-21swapper/122:30:141
3209599160,15cyclictest0-21swapper/122:10:221
3209599160,15cyclictest0-21swapper/121:50:191
3209599160,15cyclictest0-21swapper/120:15:151
3209599160,15cyclictest0-21swapper/120:00:161
3209599160,15cyclictest0-21swapper/119:10:221
3209599160,15cyclictest0-21swapper/100:15:131
32089991614,1cyclictest32613-21/usr/sbin/munin21:05:130
32089991614,1cyclictest322262chrt22:56:090
32089991614,1cyclictest25201-21ls22:45:140
32089991614,1cyclictest0-21swapper/023:40:170
32089991614,1cyclictest0-21swapper/023:10:160
32089991614,1cyclictest0-21swapper/022:40:080
32089991614,1cyclictest0-21swapper/022:15:150
32089991614,1cyclictest0-21swapper/021:45:130
32089991614,1cyclictest0-21swapper/021:45:120
32089991614,1cyclictest0-21swapper/020:50:140
32089991614,1cyclictest0-21swapper/020:35:000
32089991614,1cyclictest0-21swapper/019:10:200
32089991614,1cyclictest0-21swapper/000:15:160
3208999160,2cyclictest2987-21expr00:00:130
3208999160,2cyclictest17497-21missed_timers22:30:170
3208999160,2cyclictest11980-21fschecks_count19:30:160
3208999160,1cyclictest986-21nfsd423:55:190
3208999160,1cyclictest0-21swapper/021:56:200
3208999160,15cyclictest6614-21which19:20:160
3208999160,15cyclictest26767-21ls20:55:130
3208999160,15cyclictest25589-21cpu19:55:130
3208999160,15cyclictest17545-21fschecks_time00:25:140
3208999160,15cyclictest15617-21pzem_power19:35:210
3208999160,15cyclictest15249-21expr23:25:110
3208999160,15cyclictest0-21swapper/023:50:140
3208999160,15cyclictest0-21swapper/023:45:160
3208999160,15cyclictest0-21swapper/023:15:170
3208999160,15cyclictest0-21swapper/022:00:130
3208999160,15cyclictest0-21swapper/021:50:140
3208999160,15cyclictest0-21swapper/020:40:190
3208999160,15cyclictest0-21swapper/020:15:150
3208999160,15cyclictest0-21swapper/020:10:200
3208999160,15cyclictest0-21swapper/000:35:120
32100991514,1cyclictest0-21swapper/220:40:112
32095991513,1cyclictest0-21swapper/122:35:111
32095991513,1cyclictest0-21swapper/122:35:111
32095991513,1cyclictest0-21swapper/119:45:181
32095991513,1cyclictest0-21swapper/100:25:201
3209599150,1cyclictest0-21swapper/121:00:151
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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