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2026-04-22 - 11:27
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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 Wed Apr 22, 2026 00:46:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1483199230,5cyclictest0-21swapper/219:40:162
1483199220,18cyclictest0-21swapper/221:49:502
14830992119,1cyclictest0-21swapper/120:40:211
14830992113,3cyclictest0-21swapper/119:10:431
1483099210,20cyclictest843-21systemd-network19:51:491
1482999214,6cyclictest0-21swapper/022:14:490
14831992016,3cyclictest0-21swapper/221:06:592
14831992014,3cyclictest0-21swapper/221:04:582
1483099200,19cyclictest0-21swapper/119:20:201
14829992017,2cyclictest3979-21H222:10:210
14829992017,2cyclictest27423-21smartctl21:25:190
1483199193,15cyclictest5941-21sshd20:45:312
1483199193,15cyclictest29619-21sshd22:25:532
1483199193,15cyclictest0-21swapper/222:15:052
14831991917,1cyclictest0-21swapper/221:14:582
14831991916,2cyclictest3989-21H222:10:212
1483199190,3cyclictest0-21swapper/221:59:372
1483199190,3cyclictest0-21swapper/221:59:362
1483199190,2cyclictest3989-21H222:10:212
1483199190,16cyclictest3991-21H222:10:212
1483199190,16cyclictest3987-21H222:10:212
1483099193,15cyclictest21-21ksoftirqd/123:04:421
1483099192,16cyclictest31430-21chrt23:28:541
1483099190,2cyclictest3991-21H222:10:211
1483099190,16cyclictest3985-21H222:10:211
1483099190,16cyclictest3985-21H222:10:211
1483099190,16cyclictest3979-21H222:10:211
1482999192,16cyclictest12261-21nfsd421:55:190
1482999192,16cyclictest12261-21nfsd421:55:180
14829991917,1cyclictest0-21swapper/022:00:550
14829991916,2cyclictest3983-21H222:10:210
1482999191,16cyclictest0-21swapper/019:20:210
1482999190,2cyclictest3983-21H222:10:210
1482999190,16cyclictest4035-21H222:10:210
1482999190,16cyclictest3987-21H222:10:210
1483199182,2cyclictest14545-21snapd23:03:182
14831991815,2cyclictest25634-21cron19:30:022
14831991814,3cyclictest21837-21nfsd419:20:172
1483199181,16cyclictest25323-21chrt19:25:472
1483199180,3cyclictest399-20systemd-journal19:14:562
1483199180,2cyclictest3976-21H222:10:212
1483199180,2cyclictest29473-21fschecks_time19:35:152
1483199180,17cyclictest10151-21lxd21:32:492
1483199180,16cyclictest4099-21H222:10:212
1483099182,2cyclictest8188-21proc_pri22:45:201
1483099182,1cyclictest200852sleep119:18:571
14830991815,2cyclictest21909-21ntp_kernel_pll_21:15:191
14830991815,2cyclictest0-21swapper/122:39:131
14830991814,2cyclictest7569-21sshd21:45:431
14830991814,2cyclictest3981-21H222:10:211
14830991814,2cyclictest3981-21H222:10:211
14830991814,1cyclictest0-21swapper/123:54:111
14830991814,1cyclictest0-21swapper/120:48:551
14830991813,4cyclictest0-21swapper/100:28:471
1483099181,2cyclictest14811-21cat20:05:191
14830991812,5cyclictest19186-21ntp_kernel_pll_21:10:201
1483099181,16cyclictest9705-21smartctl19:55:191
1483099181,16cyclictest0-21swapper/121:42:431
1483099180,1cyclictest0-21swapper/100:23:471
1483099180,17cyclictest0-21swapper/119:35:031
1483099180,16cyclictest3989-21H222:10:211
1483099180,16cyclictest16951-21chrt21:06:221
1483099180,15cyclictest3987-21H222:10:211
1482999187,10cyclictest0-21swapper/019:34:320
1482999182,15cyclictest3985-21H222:10:210
14829991816,1cyclictest9-21ksoftirqd/023:08:410
14829991816,1cyclictest0-21swapper/000:19:330
14829991815,2cyclictest9-21ksoftirqd/000:24:200
14829991815,2cyclictest5291-21grep22:40:170
14829991815,2cyclictest4027-21changes_closed00:05:160
14829991814,3cyclictest3985-21H222:10:210
1482999181,16cyclictest17694-21needreboot22:05:180
1482999180,2cyclictest3983-21H222:10:210
1482999180,17cyclictest3985-21H222:10:210
1482999180,17cyclictest3983-21H222:10:210
1482999180,15cyclictest4099-21H222:10:210
1482999180,15cyclictest3989-21H222:10:210
1483199172,15cyclictest28-21ksoftirqd/223:21:282
14831991715,1cyclictest28991-21ntp_offset20:30:192
14831991715,1cyclictest22698-21/usr/sbin/munin00:10:122
14831991714,2cyclictest5606-21cat19:50:142
14831991714,2cyclictest5161-21grep22:40:182
14831991714,2cyclictest4099-21H222:10:212
14831991714,2cyclictest1976-21fschecks_count00:30:142
14831991714,2cyclictest0-21swapper/220:15:142
14831991713,3cyclictest4099-21H222:10:212
14831991713,2cyclictest3979-21H222:10:212
1483199171,15cyclictest31182sleep220:42:032
1483199171,15cyclictest0-21swapper/200:35:232
1483199170,2cyclictest9000-21fschecks_time23:45:142
1483199170,2cyclictest7289-21df20:50:142
1483199170,2cyclictest4082-21nfsd421:40:172
1483199170,2cyclictest4035-21H222:10:212
1483199170,2cyclictest4035-21H222:10:212
1483199170,2cyclictest3981-21H222:10:212
1483199170,2cyclictest32703-21idleruntime23:30:142
1483199170,2cyclictest27051-21sed21:25:172
1483199170,2cyclictest20699-21cpuspeed_turbos21:15:152
1483199170,2cyclictest18522-21sshd22:05:492
1483199170,2cyclictest14907-21missed_timers20:05:182
1483199170,2cyclictest13474-21nfsd422:55:182
1483199170,1cyclictest0-21swapper/223:27:302
1483199170,1cyclictest0-21swapper/220:35:162
1483199170,1cyclictest0-21swapper/220:20:042
1483199170,16cyclictest9459-21cpu20:55:142
1483199170,16cyclictest3414-21master21:20:262
1483199170,16cyclictest21497-21cat23:10:162
1483199170,16cyclictest19482-21mailstats19:15:212
1483199170,16cyclictest15339-21sendmail_mailqu23:55:192
1483199170,16cyclictest11042-21apache_accesses23:50:102
14830991714,2cyclictest6867-21tr20:50:141
14830991714,2cyclictest5608-21apt-get23:40:141
14830991714,2cyclictest4035-21H222:10:211
14830991714,2cyclictest3983-21H222:10:211
14830991714,2cyclictest23546-21wc21:20:141
14830991714,2cyclictest2099-21/usr/sbin/munin19:45:191
14830991714,2cyclictest2099-21/usr/sbin/munin19:45:181
14830991714,2cyclictest14478-21cron21:05:001
1483099171,2cyclictest26851-21smartctl00:15:191
1483099171,15cyclictest21-21ksoftirqd/121:51:261
1483099171,15cyclictest21-21ksoftirqd/120:34:451
1483099170,2cyclictest3989-21H222:10:211
1483099170,2cyclictest3987-21H222:10:211
1483099170,2cyclictest3976-21H222:10:211
1483099170,2cyclictest26768-21sed22:20:221
1483099170,2cyclictest16827-21expr22:05:151
1483099170,2cyclictest13382-21munin-run20:05:001
1483099170,16cyclictest9679-21ntpq23:45:181
1483099170,16cyclictest636-21missed_timers21:35:181
1483099170,16cyclictest5292-21nfsd422:40:171
1483099170,16cyclictest25891-21cat20:25:171
1483099170,16cyclictest25779-21cut19:30:011
1483099170,16cyclictest20814-21ntp_offset22:10:191
1483099170,16cyclictest18359-21cut23:05:161
1483099170,16cyclictest16663-21/usr/sbin/munin20:10:201
1483099170,16cyclictest16663-21/usr/sbin/munin20:10:201
1483099170,16cyclictest1153-21sed19:40:211
14829991714,2cyclictest4099-21H222:10:210
14829991714,2cyclictest3979-21H222:10:210
14829991714,2cyclictest26776-21cat23:20:140
14829991714,2cyclictest19551-21grep20:15:130
14829991714,2cyclictest16475-21/usr/sbin/munin21:05:210
14829991714,2cyclictest13309-21missed_timers21:00:170
14829991714,2cyclictest11430-21expr20:00:140
14829991714,2cyclictest0-21swapper/020:10:220
14829991714,2cyclictest0-21swapper/020:10:210
1482999170,2cyclictest8475-21cpuspeed_turbos21:50:130
1482999170,2cyclictest7458-21cron19:55:010
1482999170,2cyclictest15703-21idleruntime23:00:150
1482999170,2cyclictest14500-21snapd23:35:190
1482999170,1cyclictest3991-21H222:10:210
1482999170,16cyclictest7106-21expr20:50:140
1482999170,16cyclictest708-21netstat23:30:170
1482999170,16cyclictest5544-21systemctl20:45:200
1482999170,16cyclictest3991-21H222:10:210
1482999170,16cyclictest31401-21chrt23:28:270
1482999170,16cyclictest29501-21smartctl19:35:160
1482999170,16cyclictest29117-21pzem_current20:30:190
1482999170,16cyclictest26675-21sed20:25:220
1482999170,16cyclictest26616-21tlsmgr21:11:530
1482999170,16cyclictest26151-21awk22:20:180
1482999170,16cyclictest25694-21latency_hist19:30:010
1482999170,16cyclictest23747-21expr21:20:140
1482999170,16cyclictest22804-21fschecks_count20:20:160
1482999170,16cyclictest16995-21timerwakeupswit19:10:210
1482999170,16cyclictest16352-21sed20:10:000
1482999170,16cyclictest0-21swapper/019:15:230
14831991614,1cyclictest7473-21apt-get19:55:012
14831991614,1cyclictest25628-21idleruntime20:25:162
14831991614,1cyclictest13855-21cpuspeed_turbos22:00:132
14831991614,1cyclictest0-21swapper/222:20:192
14831991614,1cyclictest0-21swapper/219:45:142
14831991614,1cyclictest0-21swapper/219:45:132
1483199160,1cyclictest3989-21H222:10:212
1483199160,15cyclictest9447-21awk22:50:082
1483199160,15cyclictest7674-21latency22:45:162
1483199160,15cyclictest17137-21expr20:10:152
1483199160,15cyclictest17137-21expr20:10:142
1483199160,15cyclictest11435-21cat20:00:152
1483199160,15cyclictest0-21swapper/223:15:212
14830991614,1cyclictest10117-21fschecks_time22:50:121
14830991614,1cyclictest0-21swapper/120:20:131
1483099160,1cyclictest0-21swapper/123:15:171
1483099160,1cyclictest0-21swapper/120:39:011
1483099160,15cyclictest9641-21grep20:55:141
1483099160,15cyclictest4353-21date00:35:011
1483099160,15cyclictest3979-21H222:10:211
1483099160,15cyclictest16927-21expr00:00:141
1483099160,15cyclictest0-21swapper/123:36:291
1483099160,15cyclictest0-21swapper/123:30:141
1483099160,15cyclictest0-21swapper/122:25:221
1483099160,15cyclictest0-21swapper/121:25:141
1483099160,15cyclictest0-21swapper/119:30:181
14829991614,1cyclictest0-21swapper/022:50:120
14829991614,1cyclictest0-21swapper/020:40:140
14829991614,1cyclictest0-21swapper/020:35:200
14829991614,1cyclictest0-21swapper/019:48:590
14829991614,1cyclictest0-21swapper/019:48:590
14829991614,1cyclictest0-21swapper/019:40:150
1482999160,1cyclictest0-21swapper/022:15:140
1482999160,15cyclictest9404-21taskset20:55:070
1482999160,15cyclictest3149-21expr21:40:130
1482999160,15cyclictest29715-21latency21:30:170
1482999160,15cyclictest0-21swapper/023:45:170
1482999160,15cyclictest0-21swapper/023:40:140
1482999160,15cyclictest0-21swapper/021:15:190
1482999160,15cyclictest0-21swapper/019:55:070
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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