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2026-01-12 - 11:52
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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 Mon Jan 12, 2026 00:45:34)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1674521560,6sleep2409899cyclictest00:10:282
167262680,4sleep10-21swapper/119:35:201
188172640,3sleep00-21swapper/022:00:160
101092640,3sleep10-21swapper/121:40:191
409799635,3cyclictest134491ptp4l21:15:291
134491590,4ptp4l0-21swapper/100:02:581
134491590,20ptp4l0-21swapper/200:38:482
134491580,4ptp4l0-21swapper/019:56:330
134491580,4ptp4l0-21swapper/000:15:200
134491570,4ptp4l0-21swapper/020:45:170
134491570,3ptp4l0-21swapper/219:10:162
409699567,9cyclictest18501-21df_inode20:50:150
134491550,4ptp4l0-21swapper/123:07:061
134491550,3ptp4l0-21swapper/019:31:270
134491550,2ptp4l0-21swapper/100:21:351
134491540,4ptp4l0-21swapper/319:16:523
134491540,4ptp4l0-21swapper/221:39:202
134491540,14ptp4l0-21swapper/200:20:272
134491540,12ptp4l0-21swapper/221:05:342
409699538,4cyclictest32429-21wc22:30:140
134491530,8ptp4l0-21swapper/223:01:182
134491530,4ptp4l0-21swapper/322:13:153
134491530,4ptp4l0-21swapper/120:36:341
134491530,4ptp4l0-21swapper/120:36:341
134491520,4ptp4l0-21swapper/221:58:532
134491520,4ptp4l0-21swapper/220:39:412
134491520,4ptp4l0-21swapper/220:39:412
134491510,4ptp4l0-21swapper/220:53:452
134491510,11ptp4l0-21swapper/320:55:133
409699506,7cyclictest0-21swapper/020:45:010
134491500,2ptp4l0-21swapper/123:17:551
4099994940,4cyclictest13330-21idleruntime-cro19:29:593
134491490,5ptp4l0-21swapper/219:07:072
134491490,3ptp4l0-21swapper/000:36:150
409799482,45cyclictest0-21swapper/121:58:271
409699486,9cyclictest3057-21ls20:15:210
4096994812,6cyclictest32033-21ntp_states23:35:240
134491480,4ptp4l409799cyclictest21:13:511
134491480,4ptp4l0-21swapper/222:14:332
134491480,4ptp4l0-21swapper/200:02:062
134491480,4ptp4l0-21swapper/020:32:290
134491480,1ptp4l311rcuc/200:06:072
4099994741,4cyclictest15633-21sh19:35:003
4097994715,30cyclictest0-21swapper/122:17:081
409699476,8cyclictest2318-21gnome-shell21:36:590
409699476,7cyclictest7119-21apt-get22:45:120
134491470,8ptp4l21470-21apt-get23:15:122
134491470,4ptp4l0-21swapper/121:00:201
134491470,4ptp4l0-21swapper/100:36:401
134491470,4ptp4l0-21swapper/000:14:520
409799461,6cyclictest6192-21apt-get19:15:021
409699466,7cyclictest11759-21apt-get22:55:090
409699465,11cyclictest4106-21sed23:45:200
134491460,9ptp4l0-21swapper/221:04:282
134491460,4ptp4l0-21swapper/320:14:333
134491460,4ptp4l0-21swapper/019:52:130
134491460,3ptp4l0-21swapper/223:12:592
134491460,3ptp4l0-21swapper/222:49:392
134491460,2ptp4l0-21swapper/220:03:342
409699457,7cyclictest27776-21df_inode21:10:120
134491450,9ptp4l0-21swapper/222:55:462
134491450,9ptp4l0-21swapper/220:55:382
134491450,5ptp4l3196-21apt-get23:45:131
134491450,4ptp4l30912-21apt-get23:35:121
134491450,4ptp4l0-21swapper/122:08:241
134491450,4ptp4l0-21swapper/121:45:161
134491450,4ptp4l0-21swapper/023:28:310
134491450,3ptp4l0-21swapper/221:18:282
134491450,3ptp4l0-21swapper/219:49:122
134491450,13ptp4l0-21swapper/023:50:150
409699448,12cyclictest480-21irqrtprio21:20:180
134491440,9ptp4l0-21swapper/319:05:123
134491440,9ptp4l0-21swapper/223:40:472
134491440,9ptp4l0-21swapper/222:32:522
134491440,5ptp4l0-21swapper/219:35:272
134491440,4ptp4l22850-21apt-get19:50:121
134491440,4ptp4l18189-21apt-get19:40:101
134491440,4ptp4l0-21swapper/119:08:301
134491440,4ptp4l0-21swapper/019:19:440
134491440,3ptp4l0-21swapper/322:19:523
134491440,3ptp4l0-21swapper/221:28:542
134491440,3ptp4l0-21swapper/022:26:450
134491440,3ptp4l0-21swapper/021:27:410
134491440,3ptp4l0-21swapper/019:43:030
134491440,3ptp4l0-21swapper/000:29:540
134491440,3ptp4l0-21swapper/000:04:530
134491440,10ptp4l0-21swapper/122:48:581
409699437,7cyclictest23441-21iostat_ios21:00:160
409699437,7cyclictest16673-21iostat21:55:170
409699436,7cyclictest0-21swapper/022:05:140
409699435,8cyclictest19974-21df00:20:130
409699432,7cyclictest134491ptp4l19:45:210
134491430,9ptp4l0-21swapper/221:32:542
134491430,9ptp4l0-21swapper/221:21:532
134491430,9ptp4l0-21swapper/220:49:452
134491430,9ptp4l0-21swapper/220:17:572
134491430,9ptp4l0-21swapper/220:07:402
134491430,9ptp4l0-21swapper/219:50:382
134491430,4ptp4l2318-21gnome-shell20:21:591
134491430,4ptp4l11759-21apt-get22:55:111
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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