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2026-06-19 - 10:06
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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
Compare latency of primary with shadow system
Characteristics of the 50 highest latencies:
System rackbslot7.osadl.org (updated Fri Jun 19, 2026 00:44:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
48599910280,16cyclictest2358-21sh00:19:220
3392210117,60sleep23384-21apt-get18:54:042
1051621010,7sleep10-21swapper/121:49:231
1051621010,7sleep10-21swapper/121:49:231
3909210011,63sleep03933-21awk18:55:120
4873999778,11cyclictest0-21swapper/220:34:212
4873999778,11cyclictest0-21swapper/220:34:212
4873999772,15cyclictest0-21swapper/219:29:232
4873999678,9cyclictest0-21swapper/222:44:102
4867999674,17cyclictest4850-21cyclictest21:15:031
4867999674,17cyclictest4850-21cyclictest21:15:031
4867999641,21cyclictest3553-21latency_hist20:33:501
4867999641,21cyclictest3553-21latency_hist20:33:501
4859999655,7cyclictest181rcu_preempt23:10:420
4873999577,12cyclictest0-21swapper/219:04:182
221002950,7sleep222098-21ssh21:14:532
221002950,7sleep222098-21ssh21:14:532
4859999445,21cyclictest0-21swapper/021:48:500
4859999350,7cyclictest181rcu_preempt21:39:460
4859999250,7cyclictest181rcu_preempt23:35:470
4859999170,12cyclictest0-21swapper/021:04:090
4859999169,12cyclictest0-21swapper/019:04:160
4873999074,9cyclictest0-21swapper/220:39:112
4859998974,10cyclictest170-21jbd2/mmcblk2p2-821:09:200
4859998969,11cyclictest0-21swapper/022:34:540
4859998954,7cyclictest181rcu_preempt23:49:140
4867998870,9cyclictest0-21swapper/123:48:521
4867998843,12cyclictest181rcu_preempt21:03:471
4859998870,10cyclictest0-21swapper/020:19:160
4859998869,9cyclictest0-21swapper/018:59:100
4867998750,7cyclictest181rcu_preempt22:03:081
4859998767,11cyclictest0-21swapper/019:34:210
4873998670,9cyclictest0-21swapper/219:23:512
4873998571,7cyclictest0-21swapper/222:03:472
4873998561,14cyclictest0-21swapper/222:14:132
4859998570,8cyclictest0-21swapper/022:04:160
4859998568,12cyclictest0-21swapper/020:14:120
4859998568,11cyclictest0-21swapper/022:49:250
4859998568,11cyclictest0-21swapper/022:49:250
4859998549,8cyclictest181rcu_preempt22:47:360
4859998549,7cyclictest181rcu_preempt22:29:160
4859998549,7cyclictest181rcu_preempt22:29:160
4873998468,11cyclictest0-21swapper/221:09:162
4873998461,13cyclictest0-21swapper/222:53:502
4873998461,13cyclictest0-21swapper/222:53:502
487399843,35cyclictest12111-21apt-get20:59:002
4859998468,10cyclictest0-21swapper/023:19:120
4859998468,10cyclictest0-21swapper/023:19:120
4859998466,10cyclictest0-21swapper/023:04:230
4859998459,13cyclictest0-21swapper/019:13:500
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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