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2026-07-28 - 10:55
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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 100 highest latencies:
System rackdslot0.osadl.org (updated Tue Jul 28, 2026 00:45:59)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
22024993230,2cyclictest0-21swapper/122:15:201
2202999230,18cyclictest0-21swapper/221:35:172
2202499230,5cyclictest0-21swapper/121:07:101
2202499230,18cyclictest27744-21python323:10:001
2202399220,4cyclictest0-21swapper/022:46:000
22029992116,4cyclictest13895-21munin-run20:50:012
2202999200,19cyclictest870-21systemd-logind22:36:512
2202999200,17cyclictest0-21swapper/219:29:572
2202499200,15cyclictest0-21swapper/123:38:311
22023992017,2cyclictest9-21ksoftirqd/021:10:010
2202999193,15cyclictest0-21swapper/223:02:202
22029991919,0cyclictest0-21swapper/223:25:202
22029991916,2cyclictest12136-21grep22:40:152
22029991916,2cyclictest0-21swapper/221:08:152
22029991914,4cyclictest426-21systemd-udevd22:04:522
2202499193,15cyclictest0-21swapper/121:35:451
22024991915,3cyclictest3988-21H222:10:211
2202499190,18cyclictest843-21systemd-network20:41:561
2202399193,15cyclictest0-21swapper/022:12:200
2202399192,15cyclictest0-21swapper/020:29:130
2202399190,3cyclictest0-21swapper/019:45:150
2202399190,3cyclictest0-21swapper/019:45:150
2202999182,15cyclictest17358-21sendmail_mailqu23:45:222
22029991817,1cyclictest28-21ksoftirqd/219:51:122
22029991816,1cyclictest4758-21missed_timers00:20:172
22029991816,1cyclictest0-21swapper/222:55:152
22029991815,2cyclictest17973-21cat22:50:162
2202999180,3cyclictest399-20systemd-journal00:10:002
2202999180,3cyclictest399-20systemd-journal00:10:002
2202999180,17cyclictest843-21systemd-network21:46:542
2202999180,17cyclictest14285-21/usr/sbin/munin20:50:192
2202499182,1cyclictest7599-21nfsd400:25:181
2202499182,15cyclictest14326-21nfsd421:45:161
2202499182,15cyclictest10212chrt23:18:261
22024991815,2cyclictest29052-21chrt22:12:251
22024991815,2cyclictest28965-21chrt20:15:321
2202399181,16cyclictest14499-21snapd20:15:340
22029991715,1cyclictest0-21swapper/220:00:032
22029991714,2cyclictest3053-21systemd-logind19:20:522
22029991714,2cyclictest25853-21fschecks_time23:05:152
22029991714,2cyclictest22772-21ntp_kernel_pll_20:05:182
22029991714,2cyclictest17390-21pzem_power21:50:212
22029991714,2cyclictest1-21systemd00:30:512
22029991714,2cyclictest10125-21awk20:40:182
22029991714,1cyclictest0-21swapper/221:00:182
2202999171,15cyclictest27720-21smartctl20:15:172
2202999171,15cyclictest0-21swapper/222:13:512
2202999170,2cyclictest723-21which22:20:142
2202999170,2cyclictest3770-21fschecks_count20:30:162
2202999170,2cyclictest25104-21latency22:05:182
2202999170,2cyclictest18574-21/usr/sbin/munin21:55:172
2202999170,2cyclictest1856-21systemd-udevd23:52:512
2202999170,2cyclictest16676-21/usr/sbin/munin22:50:002
2202999170,2cyclictest1348-21lxd20:12:502
2202999170,17cyclictest0-21swapper/219:35:212
2202999170,16cyclictest7479-21pzem_energy20:35:212
2202999170,16cyclictest32653-21cpuspeed_turbos20:25:152
2202999170,16cyclictest32176-21munin-run20:25:012
2202999170,16cyclictest31497-21grep00:10:182
2202999170,16cyclictest30741-21taskset21:18:362
2202999170,16cyclictest3053-21systemd-logind21:32:522
2202999170,16cyclictest3053-21systemd-logind21:32:522
2202999170,16cyclictest26568-21idleruntime21:10:162
2202999170,16cyclictest2523-21sendmail_mailst19:30:212
2202999170,16cyclictest2161-21run-parts00:15:192
2202999170,16cyclictest12352-21ls00:35:142
2202999170,16cyclictest0-21swapper/223:40:472
2202999170,16cyclictest0-21swapper/223:21:182
22024991715,1cyclictest4875-21nfsd400:20:181
22024991715,1cyclictest12073-21cpuspeed_turbos00:35:131
22024991714,2cyclictest9390-21expr00:30:141
22024991714,2cyclictest7165-21nfsd420:35:201
22024991714,2cyclictest6893-21/usr/sbin/munin19:40:181
22024991714,2cyclictest3975-21anvil23:21:281
22024991714,2cyclictest3970-21dpkg19:35:131
22024991714,2cyclictest3841-21latency_hist19:35:021
22024991714,2cyclictest31042-21ls19:25:141
22024991714,2cyclictest24991-21sed00:00:171
22024991714,2cyclictest21108-21grep21:00:191
22024991714,2cyclictest20951-21idleruntime-cro22:00:011
22024991714,1cyclictest0-21swapper/120:15:001
2202499171,15cyclictest20524-21cat22:55:171
2202499170,2cyclictest4350-21missed_timers20:30:171
2202499170,2cyclictest26972-21https00:05:011
2202499170,2cyclictest26972-21https00:05:011
2202499170,2cyclictest25673-21smtpd19:15:371
2202499170,2cyclictest19543-21cat23:50:161
2202499170,2cyclictest19426-21latency_hist21:00:001
2202499170,2cyclictest15892-21snapd19:55:281
2202499170,2cyclictest15892-21snapd19:45:281
2202499170,2cyclictest15892-21snapd19:45:281
2202499170,2cyclictest15151-21chrt23:41:561
2202499170,2cyclictest14495-21snapd20:50:281
2202499170,2cyclictest13441-21fschecks_time19:50:151
2202499170,2cyclictest11718-21grep22:40:151
2202499170,16cyclictest5727-21latency_hist22:30:011
2202499170,16cyclictest30946-21iwlist00:10:161
2202499170,16cyclictest29192-21tune2fs23:10:161
2202499170,16cyclictest25766-21apt-config21:10:011
2202499170,16cyclictest25115-21latency_hist23:05:011
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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