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2026-03-27 - 11:11
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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 Mar 27, 2026 00:44:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
84621169,74sleep2887-21/usr/sbin/munin19:01:002
15639911539,68cyclictest0-21swapper/021:54:510
15639910521,51cyclictest0-21swapper/021:19:490
15639910521,51cyclictest0-21swapper/021:19:490
15639910421,59cyclictest0-21swapper/000:06:120
15639910333,42cyclictest10436-21ssh23:58:140
15639910245,50cyclictest24315-21ssh23:27:210
15639910245,50cyclictest24315-21ssh23:27:210
1563991022,66cyclictest12602-21seq22:14:340
15639910221,58cyclictest0-21swapper/000:04:160
1563991013,84cyclictest0-21swapper/023:04:360
1563991013,84cyclictest0-21swapper/023:04:360
1563999920,58cyclictest0-21swapper/022:13:480
1563999920,58cyclictest0-21swapper/022:13:480
1563999811,78cyclictest2952-21systemd-journal21:34:400
1563999811,78cyclictest2952-21systemd-journal21:34:400
1563999744,47cyclictest23926-21cstates21:29:420
1563999744,47cyclictest23926-21cstates21:29:420
1563999744,47cyclictest23926-21cstates21:29:420
1563999628,51cyclictest0-21swapper/023:19:540
1563999628,51cyclictest0-21swapper/023:19:540
1563999611,56cyclictest29457-21kworker/u17:3+rpciod22:43:180
1569999549,39cyclictest4133-21systemd-run22:54:261
1563999546,42cyclictest339-21sh23:40:550
1563999543,45cyclictest0-21swapper/022:35:350
1563999537,50cyclictest0-21swapper/019:24:250
1569999451,35cyclictest0-21swapper/123:24:261
1569999451,35cyclictest0-21swapper/123:24:261
156999944,78cyclictest0-21swapper/119:54:401
1563999443,45cyclictest31958-21latency20:35:450
1563999443,45cyclictest31958-21latency20:35:450
156399933,83cyclictest0-21swapper/019:54:400
156399933,78cyclictest18110-21ssh23:16:410
156399933,78cyclictest0-21swapper/023:44:380
1563999336,46cyclictest0-21swapper/022:54:280
156399933,54cyclictest7228-21seq23:52:450
1563999326,58cyclictest0-21swapper/022:29:430
1563999311,60cyclictest0-21swapper/022:46:060
3275929216,39sleep10-21swapper/119:00:391
156999923,8cyclictest0-21swapper/121:09:391
1563999240,44cyclictest352-21runrttasks21:14:420
1563999229,51cyclictest161ktimers/019:04:380
1563999227,55cyclictest0-21swapper/021:24:310
156399922,60cyclictest352-21runrttasks00:28:450
156399913,81cyclictest18628-21apt-get22:24:370
1563999134,50cyclictest0-21swapper/021:07:400
156999903,80cyclictest0-21swapper/120:14:421
156999903,49cyclictest26277-21apt-get00:24:381
1563999036,47cyclictest0-21swapper/020:10:030
1563999036,44cyclictest0-21swapper/020:44:430
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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