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2026-08-11 - 07:53
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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 11, 2026 00:45:56)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
467899270,15cyclictest17200-21cpuspeed_turbos23:20:151
467899250,19cyclictest0-21swapper/121:45:011
467399220,18cyclictest0-21swapper/000:28:260
468499210,5cyclictest0-21swapper/200:17:152
468499210,20cyclictest843-21systemd-network21:24:022
468499210,20cyclictest537-21irqstats22:50:192
467899210,3cyclictest0-21swapper/121:03:471
467899210,1cyclictest0-21swapper/123:10:121
467899204,1cyclictest0-21swapper/119:40:341
4678992014,5cyclictest0-21swapper/121:35:181
467399200,2cyclictest0-21swapper/020:10:190
468499193,1cyclictest19356-21http_loadtime19:35:142
468499192,16cyclictest9880-21sort21:10:212
468499192,16cyclictest0-21swapper/223:49:262
4684991917,1cyclictest0-21swapper/223:39:102
4684991916,2cyclictest12328-21idleruntime23:10:152
468499190,18cyclictest0-21swapper/222:33:272
468499190,15cyclictest0-21swapper/222:36:542
467899194,1cyclictest0-21swapper/122:24:211
467899192,2cyclictest6143-21date22:05:011
4678991917,1cyclictest0-21swapper/121:13:321
4678991917,1cyclictest0-21swapper/120:19:021
467899190,1cyclictest0-21swapper/122:34:221
467899190,18cyclictest7695-21apache_volume19:15:141
467899190,18cyclictest0-21swapper/120:50:131
467899190,18cyclictest0-21swapper/119:58:211
467399192,2cyclictest28729-21chrt22:42:420
467399192,16cyclictest31179-21expr23:45:160
467399192,16cyclictest0-21swapper/023:30:010
4673991916,2cyclictest21531-21switchtime20:35:220
4673991914,4cyclictest0-21swapper/021:25:130
4673991914,3cyclictest14504-21snapd23:55:270
467399190,3cyclictest10170-21nfsd420:15:190
467399190,16cyclictest3991-21H222:10:210
468499182,15cyclictest3989-21H222:10:212
4684991816,1cyclictest0-21swapper/220:30:132
4684991815,2cyclictest28287-21nfsd400:35:182
4684991815,2cyclictest13293-21egrep00:10:142
4684991815,2cyclictest11661-21ntp_offset00:05:212
4684991814,3cyclictest28004-21lxd22:06:492
4684991814,3cyclictest14432-21cron22:17:012
4684991814,3cyclictest0-21swapper/222:10:132
468499180,16cyclictest3979-21H222:10:212
467899182,15cyclictest0-21swapper/100:35:001
4678991816,1cyclictest0-21swapper/119:10:121
4678991815,2cyclictest21437-21latency_hist00:25:011
4678991813,1cyclictest0-21swapper/123:35:251
467899180,3cyclictest5404-21munin-run23:00:011
467399182,15cyclictest19340-21cat21:30:160
4673991815,2cyclictest28612-21sendmail_mailtr19:50:220
4673991815,2cyclictest23094-21systemctl19:40:210
4673991810,3cyclictest0-21swapper/000:18:560
4684991715,1cyclictest0-21swapper/222:21:322
4684991715,1cyclictest0-21swapper/221:30:162
4684991715,1cyclictest0-21swapper/221:05:232
4684991714,2cyclictest8395-21smartctl19:15:172
4684991714,2cyclictest31311-21netstat21:50:182
4684991714,2cyclictest30159-21expr19:55:142
4684991714,2cyclictest27730-21expr21:45:142
4684991714,2cyclictest2506-21cpu22:55:132
4684991714,2cyclictest18554-21expr22:25:142
4684991714,2cyclictest16283-21sendmail-mta21:25:032
4684991714,2cyclictest1475-21cpuspeed_turbos23:50:132
4684991714,2cyclictest10078-21nfsd420:15:202
4684991713,3cyclictest21862-21anvil23:30:142
4684991712,3cyclictest2007-21systemd-journal23:25:122
468499171,1cyclictest7605-21cpu00:00:152
468499171,1cyclictest0-21swapper/221:35:202
4684991711,4cyclictest0-21swapper/200:25:482
468499170,2cyclictest5498-21ls23:55:162
468499170,2cyclictest4577-21grep20:05:182
468499170,2cyclictest32750-21expr20:00:132
468499170,2cyclictest29512-21latency_hist19:55:012
468499170,2cyclictest20850-21master00:22:062
468499170,2cyclictest17189-21nfsd419:30:192
468499170,2cyclictest14385-21cpu20:25:122
468499170,16cyclictest8881-21cut23:05:142
468499170,16cyclictest5777-21gdbus23:00:012
468499170,16cyclictest29057-21kernelversion23:40:172
468499170,16cyclictest27072-21cut20:45:202
468499170,16cyclictest26626-21munin-plugin-st19:50:002
468499170,16cyclictest24086-21ntp_kernel_pll_20:40:192
468499170,16cyclictest20449-21fschecks_count20:35:142
468499170,16cyclictest15192-21if_lxdbr023:15:192
468499170,16cyclictest12177-21nfsd421:15:212
468499170,16cyclictest11639-21wc20:20:132
468499170,16cyclictest11639-21wc20:20:132
468499170,16cyclictest0-21swapper/221:40:122
468499170,16cyclictest0-21swapper/219:28:592
4678991716,1cyclictest21-21ksoftirqd/120:35:411
4678991714,2cyclictest4578-21cut20:05:181
4678991714,2cyclictest4389-21apache_accesses23:55:101
4678991714,2cyclictest3989-21H222:10:211
4678991714,2cyclictest3981-21H222:10:211
4678991714,2cyclictest26955-21apache_volume00:35:131
4678991714,2cyclictest26428-21df20:45:161
4678991714,2cyclictest22174-21fschecks_time00:25:131
4678991714,2cyclictest19755-21sed20:35:021
4678991714,2cyclictest17951-21users00:15:241
4678991714,2cyclictest17364-21memory21:25:171
4678991714,2cyclictest13964-21cat21:20:161
4678991714,2cyclictest11621-21apache_accesses20:20:121
4678991714,2cyclictest11621-21apache_accesses20:20:111
4678991713,3cyclictest3981-21H222:10:211
4678991712,3cyclictest0-21swapper/120:10:521
467899171,15cyclictest25366-21sed22:35:191
467899170,2cyclictest9611-21cat22:10:101
467899170,2cyclictest7731-21sed21:10:011
467899170,2cyclictest650-21df20:00:151
467899170,2cyclictest32426-21cat22:50:161
467899170,2cyclictest20350-21taskset22:27:121
467899170,2cyclictest1770-21awk21:55:161
467899170,2cyclictest1594-21systemd23:54:511
467899170,2cyclictest15767-21date00:15:001
467899170,2cyclictest1300-21lxd20:26:491
467899170,2cyclictest11817-21grep19:20:201
467899170,2cyclictest11090-21cstates21:15:161
467899170,16cyclictest7321-21dpkg00:00:021
467899170,16cyclictest32662-21ntpq20:55:171
467899170,16cyclictest31445-21nfsd421:50:181
467899170,16cyclictest27968-21df21:45:151
467899170,16cyclictest24078-21ntpq20:40:181
467899170,16cyclictest20583-21pzem21:30:241
467899170,16cyclictest15892-21snapd19:45:281
467899170,16cyclictest14459-21awk19:25:181
467899170,16cyclictest11325-21missed_timers00:05:201
467899170,16cyclictest0-21swapper/123:45:241
467899170,16cyclictest0-21swapper/119:30:141
4673991715,1cyclictest23872sleep020:03:350
4673991715,1cyclictest0-21swapper/023:15:210
4673991714,2cyclictest6731-21timerandwakeup19:10:510
4673991714,2cyclictest5800-21df_inode21:05:150
4673991714,2cyclictest4199-21ntp_states22:55:190
4673991714,2cyclictest3991-21H222:10:210
4673991714,2cyclictest3981-21H222:10:210
4673991714,2cyclictest390-21apache_accesses21:55:090
4673991714,2cyclictest3312-21sed23:50:210
4673991714,2cyclictest31667-21cat20:55:130
4673991714,2cyclictest30018-21wc23:40:220
4673991714,2cyclictest22720-21apache_volume20:40:130
4673991714,2cyclictest15127-21apache_volume22:20:130
4673991714,2cyclictest12062-21ls00:05:250
467399171,15cyclictest11216-21expr21:15:170
467399170,2cyclictest24666-21apache_accesses21:40:110
467399170,2cyclictest2401-21latency_hist22:55:000
467399170,2cyclictest14567-21ntp_states19:25:180
467399170,2cyclictest0-21swapper/023:20:170
467399170,2cyclictest0-21swapper/020:30:120
467399170,16cyclictest9614-21proxymap00:01:590
467399170,16cyclictest9425-21grep21:10:190
467399170,16cyclictest8692-21apache_processe23:05:110
467399170,16cyclictest7389-21memory22:05:180
467399170,16cyclictest5669-21dpkg23:00:010
467399170,16cyclictest3985-21H222:10:210
467399170,16cyclictest3981-21H222:10:210
467399170,16cyclictest30107-21apache_accesses21:50:120
467399170,16cyclictest27431-21/usr/sbin/munin20:45:220
467399170,16cyclictest26953-21apache_volume00:35:130
467399170,16cyclictest25583-21cstates23:35:120
467399170,16cyclictest22869-21cat23:30:140
467399170,16cyclictest21766-21apache_volume21:35:130
467399170,16cyclictest19696-21kernelversion00:20:200
467399170,16cyclictest18944-21expr19:35:110
467399170,16cyclictest18399-21cpuspeed_turbos22:25:140
467399170,16cyclictest16556-21fschecks_count19:30:170
467399170,16cyclictest15756-21ntp_states20:25:170
467399170,16cyclictest13998-21expr21:20:150
4684991614,1cyclictest0-21swapper/223:20:152
4684991614,1cyclictest0-21swapper/222:40:142
468499160,1cyclictest2698-21latency21:00:172
468499160,1cyclictest0-21swapper/220:10:142
468499160,15cyclictest749-21cat21:55:132
468499160,15cyclictest31290-21apache_accesses20:55:112
468499160,15cyclictest21514-21/usr/sbin/munin19:40:152
468499160,15cyclictest0-21swapper/220:50:142
4678991614,1cyclictest0-21swapper/123:15:201
467899160,1cyclictest5131-21apt-get23:00:011
467899160,1cyclictest0-21swapper/122:40:181
467899160,15cyclictest6350-21apt-get22:05:121
467899160,15cyclictest29912-21df22:45:161
467899160,15cyclictest20096-21processes19:35:171
467899160,15cyclictest12355-21apache_accesses22:15:121
467899160,15cyclictest0-21swapper/123:40:141
467899160,15cyclictest0-21swapper/123:30:141
4673991614,1cyclictest8218-21expr19:15:160
4673991614,1cyclictest13069-21smartctl22:15:150
4673991614,1cyclictest0-21swapper/019:45:160
4673991613,2cyclictest4065-21expr22:00:150
467399160,2cyclictest29729-21/usr/sbin/munin19:55:110
467399160,2cyclictest22139-21grep22:30:160
467399160,1cyclictest0-21swapper/022:45:140
467399160,1cyclictest0-21swapper/021:50:020
467399160,15cyclictest29155-21df_inode20:50:150
467399160,15cyclictest0-21swapper/022:35:120
467399160,15cyclictest0-21swapper/021:00:200
467399160,15cyclictest0-21swapper/020:20:140
467399160,15cyclictest0-21swapper/020:20:140
467399160,15cyclictest0-21swapper/019:20:150
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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