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2026-04-11 - 05:42
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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 Sat Apr 11, 2026 00:45:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
18052204139,22sleep00-21swapper/019:07:130
18052204139,22sleep00-21swapper/019:07:130
138591202169,22phc2sys0-21swapper/319:07:123
138591202169,22phc2sys0-21swapper/319:07:123
18732200168,21sleep20-21swapper/219:08:042
18732200168,21sleep20-21swapper/219:08:042
18112200167,22sleep10-21swapper/119:07:181
18112200167,22sleep10-21swapper/119:07:181
250132790,3sleep20-21swapper/223:10:142
236199700,3cyclictest18806-21wc21:50:252
89912620,3sleep00-21swapper/021:32:230
236299582,16cyclictest32479-21/usr/sbin/munin20:10:153
236199572,26cyclictest2110-21/usr/sbin/munin00:35:142
236299554,15cyclictest26054-21timerandwakeup00:15:253
236299552,18cyclictest12825-21which19:30:143
236299552,15cyclictest18795-21switchtime21:50:253
31492540,2sleep00-21swapper/022:25:190
236299546,11cyclictest27719-21sed21:05:183
236299544,15cyclictest20462-21taskset20:50:183
236299543,16cyclictest6157-21timerandwakeup21:25:263
236299542,17cyclictest10264-21/usr/sbin/munin19:25:153
236299532,16cyclictest3122-21irqstats23:30:193
235799533,47cyclictest4370-21dump-pmu-power20:20:010
236299522,14cyclictest0-21swapper/319:55:153
236299512,13cyclictest17753-21smartctl19:40:163
236299502,17cyclictest6502-21seq20:20:583
2361994928,18cyclictest33-21ksoftirqd/220:05:002
236299472,16cyclictest29428-21http22:15:003
236299472,13cyclictest23569-21mailstats23:05:233
236299471,14cyclictest4857-21apt-get19:15:133
2362994640,4cyclictest15285-21fschecks_count21:45:163
2362994640,3cyclictest31701-21sh21:15:003
236299462,15cyclictest24549-21/usr/sbin/munin23:10:183
236299461,15cyclictest2073-21/usr/sbin/munin20:15:173
236299451,16cyclictest9496-21/usr/sbin/munin23:45:193
236299431,17cyclictest19698-21/usr/sbin/munin21:55:223
236299431,16cyclictest32291-21/usr/sbin/munin22:20:263
236199431,25cyclictest10089-21fschecks_time20:30:172
236199430,23cyclictest6803-21sshd22:31:312
138491430,0ptp4l401ktimersoftd/321:21:003
236199421,20cyclictest0-21swapper/219:46:302
236199420,3cyclictest23979-21chrt23:05:492
138491420,0ptp4l401ktimersoftd/321:38:363
138491410,33ptp4l0-21swapper/319:10:003
236199403,20cyclictest24648-21apt-get22:05:112
2357994033,4cyclictest19465-21cron21:55:010
2361993930,6cyclictest33-21ksoftirqd/221:20:002
2358993934,3cyclictest25-21ksoftirqd/121:15:001
2358993932,4cyclictest19395-21sendmail23:00:001
2357993934,3cyclictest9-21ksoftirqd/023:02:460
2357993934,3cyclictest9-21ksoftirqd/023:02:450
138491390,0ptp4l401ktimersoftd/323:15:303
2361993832,4cyclictest33-21ksoftirqd/200:05:502
2357993832,4cyclictest9-21ksoftirqd/019:24:590
50798370,6rtkit-daemon15549-21sed19:35:190
2361993731,4cyclictest33-21ksoftirqd/220:51:452
2361993731,4cyclictest33-21ksoftirqd/219:33:392
2358993731,4cyclictest25-21ksoftirqd/122:00:111
2358993731,4cyclictest25-21ksoftirqd/120:36:121
2358993731,4cyclictest25-21ksoftirqd/119:35:501
2358993730,5cyclictest25-21ksoftirqd/119:17:061
235899372,2cyclictest121rcu_preempt20:15:531
2357993733,2cyclictest19388-21idleruntime-cro22:59:590
2362993631,3cyclictest41-21ksoftirqd/320:40:113
2362993630,4cyclictest41-21ksoftirqd/322:30:073
2362993630,4cyclictest41-21ksoftirqd/319:48:363
2361993630,4cyclictest33-21ksoftirqd/223:43:042
2361993630,4cyclictest33-21ksoftirqd/223:43:032
2361993630,4cyclictest33-21ksoftirqd/221:40:082
2361993630,4cyclictest33-21ksoftirqd/221:40:082
236199361,23cyclictest30998-21switchtime21:10:242
2358993630,4cyclictest25-21ksoftirqd/123:31:311
2358993630,4cyclictest25-21ksoftirqd/120:25:491
2358993630,4cyclictest25-21ksoftirqd/120:13:501
2358993630,4cyclictest25-21ksoftirqd/119:44:251
2358993630,4cyclictest25-21ksoftirqd/100:31:331
2358993629,5cyclictest25-21ksoftirqd/120:54:171
2357993630,4cyclictest9-21ksoftirqd/000:36:280
2357993630,4cyclictest9-21ksoftirqd/000:16:030
50798350,2rtkit-daemon0-21swapper/020:24:300
236299353,5cyclictest0-21swapper/319:35:253
2362993529,4cyclictest41-21ksoftirqd/323:38:313
2362993529,4cyclictest41-21ksoftirqd/323:38:313
2362993529,3cyclictest41-21ksoftirqd/323:25:103
2361993530,3cyclictest33-21ksoftirqd/219:52:022
2361993529,4cyclictest33-21ksoftirqd/222:59:382
2361993529,4cyclictest33-21ksoftirqd/222:04:152
2361993529,4cyclictest33-21ksoftirqd/221:59:522
2361993529,4cyclictest33-21ksoftirqd/220:23:572
2361993529,4cyclictest33-21ksoftirqd/220:19:362
236199350,23cyclictest15273-21/usr/sbin/munin21:45:152
236199350,22cyclictest32040-21/usr/sbin/munin00:30:232
2358993529,4cyclictest25-21ksoftirqd/122:52:241
2358993529,4cyclictest25-21ksoftirqd/121:50:111
2358993529,4cyclictest25-21ksoftirqd/121:33:451
2358993529,4cyclictest25-21ksoftirqd/120:47:071
2358993529,4cyclictest25-21ksoftirqd/120:03:301
2358993529,4cyclictest25-21ksoftirqd/119:57:041
2358993529,4cyclictest25-21ksoftirqd/119:35:001
2358993529,4cyclictest25-21ksoftirqd/100:23:351
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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