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2026-07-31 - 14:13
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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 rackdslot1.osadl.org (updated Fri Jul 31, 2026 00:45:42)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
210621810,5sleep10-21swapper/119:05:121
1780521390,2sleep1437299cyclictest00:15:191
137872800,24sleep233-21ksoftirqd/221:50:132
4374996711,53cyclictest27940-21chrt00:35:503
437499668,11cyclictest28001-21df_abs20:00:143
437499668,11cyclictest27992-21apt-config23:30:003
4374996412,49cyclictest11214-21chrt21:44:493
437499637,11cyclictest20917-21cpuspeed_turbos20:55:143
437499637,11cyclictest2088-21latency_hist20:15:003
4374996311,15cyclictest3307-21iostat_ios23:45:173
437499626,16cyclictest0-21swapper/321:45:143
4374996210,50cyclictest0-21swapper/320:20:193
134491620,4ptp4l27609-21sendmail-msp22:20:021
134491620,4ptp4l0-21swapper/222:55:282
437499619,9cyclictest23895-21latency_hist00:29:593
437499617,11cyclictest31583-21cat22:25:283
4374996111,9cyclictest28547-21sed22:20:193
134491610,21ptp4l29192-21needreboot23:30:221
437499609,11cyclictest21204-21cut19:45:193
437499606,12cyclictest13828-21/usr/sbin/munin20:40:193
134491600,4ptp4l31778-21mailstats23:35:261
134491600,4ptp4l0-21swapper/323:15:083
134491600,4ptp4l0-21swapper/221:55:132
134491600,4ptp4l0-21swapper/100:30:181
134491600,3ptp4l0-21swapper/120:20:251
437499599,17cyclictest14995-21irqrtprio23:00:233
437499598,16cyclictest18188-21latency_hist20:50:003
437499589,11cyclictest26222-21wc21:05:183
437499588,9cyclictest436-21if_enp1s022:30:183
437499588,9cyclictest0-21swapper/320:20:003
437499586,15cyclictest0-21swapper/300:20:003
437499586,11cyclictest7226-21df_abs20:25:143
437499585,9cyclictest16541-21ps19:35:193
19762580,4sleep11980-21unixbench_multi23:40:291
134491580,3ptp4l0-21swapper/022:11:150
437499577,17cyclictest1922-21Xorg00:10:313
437499575,10cyclictest10750-21cat20:30:263
437499569,10cyclictest24295-21ntp_kernel_pll_22:10:243
437499569,10cyclictest14197-21cut21:50:163
437499565,10cyclictest2657-21df_abs22:35:133
134491560,4ptp4l0-21swapper/220:51:402
134491560,4ptp4l0-21swapper/219:15:152
134491560,3ptp4l0-21swapper/222:45:552
437499559,11cyclictest18847-21grep20:50:153
437499559,11cyclictest0-21swapper/321:15:183
134491550,5ptp4l0-21swapper/022:52:320
134491550,3ptp4l0-21swapper/222:30:262
134491550,11ptp4l1992-21apt-get19:05:110
437499546,16cyclictest20496-21phc2sys00:20:243
437499546,15cyclictest9061-21/usr/sbin/munin19:20:253
134491540,4ptp4l0-21swapper/222:41:532
134491540,3ptp4l0-21swapper/220:20:382
134491540,3ptp4l0-21swapper/220:07:512
134491540,3ptp4l0-21swapper/220:07:512
134491540,3ptp4l0-21swapper/121:12:261
134491540,3ptp4l0-21swapper/120:00:111
134491540,3ptp4l0-21swapper/021:30:170
437499534,11cyclictest0-21swapper/323:10:263
4373995317,4cyclictest33-21ksoftirqd/223:55:002
134491530,5ptp4l0-21swapper/100:23:521
134491530,4ptp4l0-21swapper/221:36:512
134491530,4ptp4l0-21swapper/220:31:102
134491530,4ptp4l0-21swapper/200:31:122
134491530,4ptp4l0-21swapper/123:54:581
134491530,4ptp4l0-21swapper/120:05:251
134491530,4ptp4l0-21swapper/120:05:251
134491530,4ptp4l0-21swapper/022:17:400
134491530,3ptp4l0-21swapper/221:02:072
134491530,12ptp4l0-21swapper/223:00:232
437499524,15cyclictest30222-21df_abs20:05:133
437499524,15cyclictest30222-21df_abs20:05:133
134491520,4ptp4l0-21swapper/223:09:442
134491520,4ptp4l0-21swapper/122:21:181
134491520,4ptp4l0-21swapper/000:06:440
437499517,7cyclictest23820-21taskset19:50:193
437499515,8cyclictest25553-21latency_hist23:25:003
134491510,4ptp4l0-21swapper/219:14:202
134491510,3ptp4l0-21swapper/220:40:252
134491510,3ptp4l0-21swapper/219:27:032
134491510,3ptp4l0-21swapper/200:21:122
134491510,3ptp4l0-21swapper/020:41:340
134491510,17ptp4l25-21ksoftirqd/120:37:501
437499508,40cyclictest0-21swapper/300:34:083
437499508,17cyclictest5801-21ntp_states22:40:233
134491500,4ptp4l0-21swapper/219:50:072
134491500,4ptp4l0-21swapper/020:02:430
134491500,4ptp4l0-21swapper/019:54:150
134491500,4ptp4l0-21swapper/019:40:150
437499498,14cyclictest11514-21/usr/sbin/munin20:35:163
437499494,11cyclictest8963-21switchtime23:55:263
134491490,4ptp4l0-21swapper/022:41:460
134491490,4ptp4l0-21swapper/019:39:570
134491490,3ptp4l0-21swapper/022:07:370
437499489,7cyclictest6216-21ntp_states23:50:233
437499489,11cyclictest17117-21needreboot21:55:223
437499488,7cyclictest21923-21ls22:05:223
437499488,10cyclictest0-21swapper/323:35:153
437499485,9cyclictest19609-21ps22:00:273
437499485,9cyclictest19609-21ps22:00:273
4373994838,2cyclictest134491ptp4l21:45:252
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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