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2025-11-27 - 06:29

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #1, slot #6

Rack #0/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #1/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #2/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #3/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #4/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #5/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #6/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #7/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #8/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #9/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #a/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #b/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #c/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #d/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #e/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #f/#0 #1 #2 #3 #4 #5 #6 #7 #8 
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  Intel
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Click on a legend element to toggle display of that core, ctrl-click inverts display, shift-click enables all.

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
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rack1slot6s.osadl.org (updated Thu Nov 27, 2025 00:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
8230999021,9cyclictest1243-21snmpd21:34:540
823099883,77cyclictest0-21swapper/021:25:500
823099864,75cyclictest0-21swapper/021:09:490
823099863,11cyclictest0-21swapper/023:44:460
8230998618,12cyclictest0-21swapper/021:30:030
823099844,72cyclictest0-21swapper/023:07:440
823099843,29cyclictest0-21swapper/000:02:570
8230998321,9cyclictest9692-21telnet20:04:430
823099824,72cyclictest0-21swapper/020:59:490
8230998224,9cyclictest8818-21timerwakeupswit20:00:070
8230998223,52cyclictest0-21swapper/020:50:000
8230998215,59cyclictest8210-21idleruntime-cro18:54:350
823099814,69cyclictest0-21swapper/023:49:510
823099814,12cyclictest0-21swapper/021:54:560
823099813,26cyclictest0-21swapper/023:16:440
8230998119,8cyclictest29926-21munin-node19:39:550
823099803,26cyclictest0-21swapper/018:54:580
823099803,12cyclictest0-21swapper/021:04:500
823099803,12cyclictest0-21swapper/020:44:420
8230998026,47cyclictest1369-21runrttasks21:14:490
8230998024,49cyclictest0-21swapper/000:22:370
8230998022,12cyclictest7983-21grep23:29:430
8230998015,12cyclictest0-21swapper/022:09:280
8230998015,12cyclictest0-21swapper/022:09:280
823099799,9cyclictest114550irq/46-eth022:35:010
823099798,12cyclictest0-21swapper/020:24:510
823099795,11cyclictest0-21swapper/020:24:310
823099794,67cyclictest0-21swapper/023:35:330
823099794,67cyclictest0-21swapper/023:35:330
823099794,12cyclictest0-21swapper/022:09:400
8230997922,7cyclictest1369-21runrttasks20:56:290
823099784,67cyclictest0-21swapper/019:25:190
823099783,63cyclictest0-21swapper/022:40:270
823099783,26cyclictest10740-21munin-node22:29:480
8230997724,8cyclictest5908-21latency19:54:580
8230997723,11cyclictest0-21swapper/020:30:010
8230997721,12cyclictest0-21swapper/023:19:560
8230997719,12cyclictest0-21swapper/021:48:510
8230997718,10cyclictest1369-21runrttasks21:20:020
823099766,11cyclictest0-21swapper/023:54:440
823099763,11cyclictest0-21swapper/019:29:520
8230997624,9cyclictest1369-21runrttasks20:34:520
8230997624,45cyclictest15607-21munin-node19:10:000
8230997612,9cyclictest7150irq/45-ahci00:19:220
8230997612,9cyclictest7150irq/45-ahci00:19:220
8230997612,10cyclictest1243-21snmpd00:13:280
823099758,9cyclictest114550irq/46-eth022:19:550
823099753,11cyclictest0-21swapper/019:15:050
823099753,11cyclictest0-21swapper/019:15:050
823099753,11cyclictest0-21swapper/019:04:490
8230997519,8cyclictest22536-21munin-run19:24:340
823099744,12cyclictest0-21swapper/022:14:410
823099743,26cyclictest17897-21munin-node22:44:480
823099743,11cyclictest0-21swapper/019:44:470
8230997422,9cyclictest1369-21runrttasks22:03:090
8230997422,8cyclictest1369-21runrttasks23:27:560
8230997422,7cyclictest23120-21cstates20:39:450
8230997422,7cyclictest23120-21cstates20:39:450
8230997421,8cyclictest1369-21runrttasks19:49:510
8230997413,8cyclictest23929-21munin-node21:50:040
8230997412,9cyclictest11897-21munin-node23:39:570
8230997322,8cyclictest19241-21aten_r1power_po21:39:400
8230997310,9cyclictest114550irq/46-eth022:51:240
8230997310,9cyclictest114550irq/46-eth022:51:240
823099728,9cyclictest114550irq/46-eth000:06:460
823099723,13cyclictest0-21swapper/022:54:360
823099719,9cyclictest114550irq/46-eth022:24:460
823099719,17cyclictest0-21swapper/022:59:440
823099714,30cyclictest0-21swapper/020:14:490
823099714,28cyclictest0-21swapper/023:10:000
823099713,16cyclictest0-21swapper/019:04:350
823099693,30cyclictest0-21swapper/019:35:080
823699666,52cyclictest0-21swapper/321:54:473
243799650,5rtkit-daemon2436-21rtkit-daemon19:48:402
8233996438,11cyclictest0-21swapper/121:04:571
823099643,28cyclictest0-21swapper/020:10:340
823699636,50cyclictest0-21swapper/323:12:443
823699634,51cyclictest0-21swapper/319:04:553
823599624,9cyclictest19665-21unixbench_multi20:30:052
823399625,13cyclictest0-21swapper/120:34:431
8233996235,12cyclictest0-21swapper/119:44:591
823699615,49cyclictest0-21swapper/321:34:303
823599614,49cyclictest31634-21grep19:40:082
823699604,49cyclictest0-21swapper/322:24:523
823599604,49cyclictest0-21swapper/223:33:582
823599603,50cyclictest0-21swapper/223:34:492
823599603,50cyclictest0-21swapper/223:34:492
8233996033,12cyclictest25081-21munin-node22:59:491
248802603,11sleep10-21swapper/119:29:071
823699595,47cyclictest10836-21munin-node19:00:063
823699594,49cyclictest0-21swapper/323:54:543
823699594,48cyclictest0-21swapper/322:54:453
823699594,48cyclictest0-21swapper/320:34:323
323212593,49sleep20-21swapper/220:59:412
823699584,47cyclictest22762-21munin-node19:25:023
823699584,47cyclictest0-21swapper/323:39:243
823699584,47cyclictest0-21swapper/323:39:243
823699584,47cyclictest0-21swapper/319:24:353
823699583,48cyclictest7198-21munin-node21:14:503
823599583,48cyclictest0-21swapper/222:34:442
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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