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2026-08-10 - 00:05

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #7, slot #7

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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Click here to display the system's profile data or here to proceed to next system.
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, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 50 highest latencies:
System rack7slot7s.osadl.org (updated Sun Aug 09, 2026 12:43:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
111529873,8sleep00-21swapper/007:08:250
114129368,9sleep20-21swapper/207:08:442
100729166,9sleep30-21swapper/307:07:043
109628265,13sleep10-21swapper/107:08:101
207952550,0sleep00-21swapper/012:19:560
321372510,0sleep20-21swapper/211:28:162
272642290,0sleep00-21swapper/010:45:560
133899290,1cyclictest0-21swapper/210:20:142
1340992724,2cyclictest39-21ksoftirqd/309:50:003
133499261,16cyclictest225-21systemd-journal10:59:591
133199252,22cyclictest32606-21sh09:13:120
134099240,23cyclictest0-21swapper/312:17:313
134099240,0cyclictest0-21swapper/309:20:253
133499240,23cyclictest0-21swapper/109:13:301
133199240,21cyclictest0-21swapper/012:37:110
134099230,21cyclictest0-21swapper/312:26:263
133899230,1cyclictest0-21swapper/209:38:182
133199235,6cyclictest225-21systemd-journal10:59:590
1334992220,1cyclictest0-21swapper/111:01:541
1334992220,1cyclictest0-21swapper/109:27:441
134099216,12cyclictest17274-21ssh11:00:123
133899210,20cyclictest0-21swapper/212:09:012
133899210,20cyclictest0-21swapper/210:47:302
133899200,19cyclictest0-21swapper/210:10:172
1334992018,1cyclictest0-21swapper/110:40:211
1334991918,1cyclictest0-21swapper/109:48:081
133499190,19cyclictest0-21swapper/112:24:591
133499190,18cyclictest0-21swapper/112:29:231
1340991818,0cyclictest0-21swapper/311:15:313
133499181,15cyclictest0-21swapper/111:25:131
133499180,18cyclictest0-21swapper/110:01:431
133499180,16cyclictest0-21swapper/110:38:001
133499180,16cyclictest0-21swapper/109:36:281
1331991814,3cyclictest13-21ksoftirqd/010:15:120
61212170,0sleep30-21swapper/310:53:153
133899170,17cyclictest0-21swapper/209:16:542
1334991716,1cyclictest0-21swapper/111:58:011
1331991716,1cyclictest0-21swapper/011:49:100
133199170,0cyclictest0-21swapper/010:42:530
134099160,1cyclictest0-21swapper/310:15:083
134099160,15cyclictest0-21swapper/311:10:143
1334991615,1cyclictest0-21swapper/110:48:171
133499161,14cyclictest26552-21diskmemload11:15:001
133499160,2cyclictest0-21swapper/112:32:411
133499160,1cyclictest0-21swapper/110:51:101
133499160,1cyclictest0-21swapper/109:19:191
133199165,6cyclictest6372-21perf10:15:000
1331991615,1cyclictest13-21ksoftirqd/009:39:340
1340991510,3cyclictest12496-21munin-run12:15:003
1338991514,1cyclictest0-21swapper/212:33:362
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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