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2026-07-17 - 12:50
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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 rackdslot4.osadl.org (updated Fri Jul 17, 2026 00:45:53)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
49822224159,21sleep20-21swapper/219:07:242
49472206172,23sleep30-21swapper/319:07:013
48602204171,22sleep10-21swapper/119:05:551
49492202169,22sleep00-21swapper/019:07:020
1759221440,7sleep2547799cyclictest19:35:002
235772660,3sleep023580-21irqrtprio21:55:180
547799614,16cyclictest14069-21cat23:45:192
547799604,11cyclictest10293-21latency_hist21:30:012
547799582,16cyclictest0-21swapper/223:40:122
296372580,2sleep20-21swapper/219:55:262
93282570,2sleep10-21swapper/120:20:241
547799577,11cyclictest26004-21cat23:05:132
547799562,10cyclictest0-21swapper/221:40:122
138491560,1ptp4l401ktimersoftd/321:37:573
547799554,9cyclictest0-21swapper/219:45:192
547799553,19cyclictest0-21swapper/220:55:142
547799553,19cyclictest0-21swapper/220:55:142
547799552,19cyclictest0-21swapper/222:56:212
547799552,19cyclictest0-21swapper/222:56:212
547799552,15cyclictest3083-21/usr/sbin/munin21:15:292
547799551,15cyclictest0-21swapper/223:35:232
547799549,16cyclictest672-21gdbus00:00:292
547799545,10cyclictest28080-21grep00:15:132
547799542,11cyclictest0-21swapper/223:50:152
547799541,16cyclictest0-21swapper/222:20:172
138491540,0ptp4l401ktimersoftd/323:55:203
547799535,9cyclictest7149-21switchtime23:30:262
547799527,9cyclictest2997-21latency_hist22:20:012
547799527,9cyclictest2997-21latency_hist22:20:012
547799524,7cyclictest20018-21apt-get20:45:002
547799522,17cyclictest0-21swapper/219:35:162
547799520,16cyclictest0-21swapper/223:00:252
138491520,0ptp4l401ktimersoftd/322:37:143
547799515,16cyclictest3715-21irqrtprio20:10:182
547799514,15cyclictest13917-21cut22:40:202
547799514,11cyclictest10656-21cstates20:25:142
547799514,10cyclictest31441-21cat20:00:202
547799514,10cyclictest31441-21cat20:00:202
547799512,16cyclictest0-21swapper/222:10:222
547799511,15cyclictest0-21swapper/221:45:272
547799510,15cyclictest0-21swapper/223:20:242
87812500,1sleep30-21swapper/322:30:163
547799507,16cyclictest333-21gpgv21:10:012
547799506,15cyclictest6048-21fschecks_time19:10:162
547799505,17cyclictest9292-21/usr/sbin/munin20:20:242
547799502,11cyclictest0-21swapper/220:15:132
547799501,16cyclictest0-21swapper/223:15:262
547799501,15cyclictest0-21swapper/221:00:142
547799495,10cyclictest25501-21cpuspeed_turbos22:00:132
547799493,15cyclictest1319-21snmpd00:11:372
547799493,10cyclictest0-21swapper/223:55:132
547799492,15cyclictest0-21swapper/219:20:132
547799475,10cyclictest0-21swapper/219:15:282
547799464,16cyclictest874-21df_abs20:05:152
547799461,16cyclictest0-21swapper/200:20:142
547799456,7cyclictest24029-21memory00:05:252
547799456,10cyclictest20797-21diskstats19:40:142
547799451,16cyclictest0-21swapper/221:20:162
547799451,15cyclictest0-21swapper/200:32:512
138491450,0ptp4l401ktimersoftd/322:43:493
547799446,11cyclictest521-21/usr/sbin/munin21:10:222
547799444,9cyclictest20437-21cat22:55:012
547799444,10cyclictest13994-21meminfo19:25:192
547799443,7cyclictest15271-21apt-get20:35:122
547799441,16cyclictest0-21swapper/223:25:252
547799435,15cyclictest13481-21awk20:30:182
547799432,16cyclictest21722-21ps21:50:232
138491430,0ptp4l401ktimersoftd/323:16:433
547599424,2cyclictest121rcu_preempt23:54:590
138491420,0ptp4l401ktimersoftd/320:42:383
138491420,0ptp4l401ktimersoftd/320:24:003
5477994112,26cyclictest33-21ksoftirqd/222:34:362
547799410,15cyclictest0-21swapper/222:35:132
5476994120,14cyclictest25-21ksoftirqd/100:05:261
5478994033,4cyclictest32603-21cron20:05:003
5478994033,4cyclictest32603-21cron20:04:593
547799404,8cyclictest24176-21ps21:55:232
5476994033,4cyclictest25-21ksoftirqd/100:30:001
5476994031,5cyclictest25-21ksoftirqd/123:05:131
547599404,2cyclictest121rcu_preempt23:10:220
5475994035,3cyclictest9-21ksoftirqd/000:25:010
5475994034,3cyclictest9-21ksoftirqd/021:40:000
5475993935,3cyclictest9-21ksoftirqd/022:15:010
5475993935,2cyclictest9-21ksoftirqd/023:59:590
5475993935,2cyclictest9-21ksoftirqd/021:54:590
5475993933,3cyclictest9-21ksoftirqd/020:40:000
547799384,14cyclictest7042-21ps22:25:242
547599385,2cyclictest121rcu_preempt23:10:000
5475993834,2cyclictest111rcuc/022:20:190
5475993832,3cyclictest9-21ksoftirqd/021:45:000
547599382,4cyclictest9-21ksoftirqd/020:45:260
5475993824,2cyclictest8403-21latency_hist00:40:000
138491380,0ptp4l401ktimersoftd/323:20:163
138491380,0ptp4l401ktimersoftd/320:10:153
5476993733,3cyclictest25-21ksoftirqd/119:40:001
5476993732,3cyclictest25-21ksoftirqd/122:20:001
5476993732,3cyclictest25-21ksoftirqd/122:20:001
5476993732,3cyclictest25-21ksoftirqd/122:10:001
5476993732,3cyclictest25-21ksoftirqd/120:20:011
5476993732,3cyclictest25-21ksoftirqd/100:35:011
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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