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2025-12-11 - 07:49
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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 Thu Dec 11, 2025 00:45:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
249242820,5sleep30-21swapper/319:05:233
2847191680,4ptp4l0-21swapper/321:57:343
2847191670,4ptp4l0-21swapper/122:45:271
2847191620,17ptp4l8810-21apt-get22:00:143
289832610,3sleep20-21swapper/219:15:172
2847191610,4ptp4l0-21swapper/119:08:591
2847191610,3ptp4l0-21swapper/319:56:033
2601199617,11cyclictest2398-21if_err_enp1s021:45:142
2847191590,4ptp4l0-21swapper/323:52:033
2847191590,4ptp4l0-21swapper/221:12:252
2601199599,9cyclictest28711-21idleruntime-cro20:25:002
2601199598,10cyclictest28327-21cut22:40:182
2601199595,12cyclictest21189-21cat20:05:282
2847191580,4ptp4l0-21swapper/321:32:233
2847191580,4ptp4l0-21swapper/319:20:413
2847191580,4ptp4l0-21swapper/200:20:192
2847191580,3ptp4l0-21swapper/200:39:492
2847191570,4ptp4l0-21swapper/321:37:123
2847191570,3ptp4l0-21swapper/321:26:043
2847191570,3ptp4l0-21swapper/320:00:263
2601199578,10cyclictest10689-21df_abs19:45:182
241702570,3sleep00-21swapper/022:30:240
2847191560,4ptp4l0-21swapper/323:40:423
2847191560,4ptp4l0-21swapper/322:05:073
2847191560,4ptp4l0-21swapper/300:30:233
2847191560,4ptp4l0-21swapper/222:45:082
2847191560,4ptp4l0-21swapper/222:25:222
2847191560,3ptp4l0-21swapper/220:10:232
2601199569,15cyclictest6013-21date20:45:012
2601199566,15cyclictest1795-21llvmpipe-220:50:592
2847191550,5ptp4l0-21swapper/319:25:133
2847191550,4ptp4l0-21swapper/319:41:133
2847191550,3ptp4l0-21swapper/320:10:453
2847191550,3ptp4l0-21swapper/319:50:113
2847191550,3ptp4l0-21swapper/319:48:143
2847191550,3ptp4l0-21swapper/319:35:033
2601199557,15cyclictest19955-21systemctl23:30:242
2601199553,15cyclictest0-21swapper/221:40:192
26011995512,40cyclictest2134-21kworker/2:121:55:282
2847191540,4ptp4l0-21swapper/323:16:493
2847191540,4ptp4l0-21swapper/321:11:143
2847191540,4ptp4l0-21swapper/319:19:113
2847191540,3ptp4l0-21swapper/321:10:003
2847191540,3ptp4l0-21swapper/320:23:023
2847191540,3ptp4l0-21swapper/222:20:312
2601199546,10cyclictest0-21swapper/200:25:292
2847191530,4ptp4l0-21swapper/322:38:013
2847191530,4ptp4l0-21swapper/300:12:003
2847191530,3ptp4l0-21swapper/322:40:193
2847191530,3ptp4l0-21swapper/300:37:093
2847191530,3ptp4l0-21swapper/300:19:133
2847191530,1ptp4l0-21swapper/221:09:042
2601199539,9cyclictest9491-21sed00:15:292
2847191520,4ptp4l0-21swapper/320:57:323
2847191520,4ptp4l0-21swapper/320:36:253
2847191520,4ptp4l0-21swapper/320:36:253
2847191520,4ptp4l0-21swapper/122:44:321
2847191520,4ptp4l0-21swapper/020:35:260
2847191520,4ptp4l0-21swapper/020:35:260
2847191520,11ptp4l0-21swapper/323:38:123
2601199529,10cyclictest25678-21cat20:15:272
2601199524,10cyclictest3844-21switchtime22:55:302
2601199523,11cyclictest8189-21ntp_states23:05:252
2847191510,3ptp4l0-21swapper/322:56:433
2847191510,3ptp4l0-21swapper/320:25:323
2601199517,15cyclictest3507-21sed19:30:152
2601199516,11cyclictest9826-21cat22:00:232
2601199514,11cyclictest17797-21hddtemp_smartct20:00:192
2601199513,16cyclictest207-21systemd-journal21:50:232
2847191500,4ptp4l0-21swapper/322:13:383
2847191500,3ptp4l0-21swapper/321:49:593
2847191500,14ptp4l0-21swapper/122:55:211
2847191500,10ptp4l24607-21ls19:05:190
2601199506,11cyclictest16998-21sed00:35:012
2601199505,9cyclictest0-21swapper/222:10:012
2847191490,4ptp4l0-21swapper/323:28:073
2847191490,4ptp4l0-21swapper/322:25:533
2847191490,4ptp4l0-21swapper/319:34:413
2847191490,3ptp4l0-21swapper/323:45:403
2601199496,11cyclictest23192-21cut21:20:212
2601199494,15cyclictest25564-21/usr/sbin/munin23:45:172
2601199492,11cyclictest26138-21cat22:35:202
2847191480,4ptp4l0-21swapper/323:09:203
2847191480,4ptp4l0-21swapper/023:03:180
2847191470,8ptp4l0-21swapper/021:40:140
2847191470,4ptp4l0-21swapper/119:45:031
2847191470,10ptp4l0-21swapper/022:21:440
2601199475,10cyclictest6333-21irqrtprio19:35:182
39962460,4sleep10-21swapper/120:40:131
2847191460,5ptp4l0-21swapper/322:31:473
2847191460,4ptp4l0-21swapper/300:21:313
2847191460,4ptp4l0-21swapper/220:25:152
2847191460,3ptp4l0-21swapper/020:30:360
2847191460,11ptp4l7177-21cat20:45:222
2847191460,10ptp4l0-21swapper/321:21:143
2601199465,8cyclictest15024-21apt-get19:55:142
2601199464,9cyclictest0-21swapper/219:20:292
2601199460,17cyclictest0-21swapper/221:15:172
2847191450,6ptp4l0-21swapper/220:30:132
2847191450,4ptp4l0-21swapper/320:15:553
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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