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2026-05-28 - 21:04

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 Thu May 28, 2026 12:43:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1502329750,43sleep10-21swapper/107:05:061
1690429575,15sleep20-21swapper/207:06:442
1687029465,9sleep30-21swapper/307:06:173
1714529280,8sleep00-21swapper/007:09:510
115772480,0sleep20-21swapper/211:24:092
17243993028,1cyclictest0-21swapper/110:26:251
17243992626,0cyclictest0-21swapper/110:20:001
17243992626,0cyclictest0-21swapper/110:20:001
1725099240,0cyclictest0-21swapper/310:52:543
17240992421,2cyclictest94-21kswapd009:37:230
1725099230,0cyclictest0-21swapper/311:30:333
17243992319,3cyclictest0-21swapper/109:55:001
1724399230,1cyclictest0-21swapper/111:30:041
17240992320,2cyclictest10051-21diskmemload10:30:430
17246992219,2cyclictest0-21swapper/207:50:002
1724399226,9cyclictest0-21swapper/111:06:281
1724399220,0cyclictest0-21swapper/110:53:041
1724399216,15cyclictest10051-21diskmemload11:57:351
17243992119,2cyclictest10051-21diskmemload12:33:551
1724399211,7cyclictest0-21swapper/112:35:131
17243992117,4cyclictest0-21swapper/110:06:541
17243992117,3cyclictest0-21swapper/109:10:191
17243992015,5cyclictest0-21swapper/111:35:331
17243992012,7cyclictest0-21swapper/108:30:131
17243992011,8cyclictest10051-21diskmemload12:19:131
1724399200,20cyclictest0-21swapper/112:13:231
1725099193,2cyclictest3165-21apt-get08:55:133
1725099190,17cyclictest0-21swapper/310:22:103
1725099190,16cyclictest0-21swapper/310:16:243
1725099190,16cyclictest0-21swapper/310:16:243
1724399193,15cyclictest0-21swapper/110:01:281
17243991919,0cyclictest0-21swapper/110:58:451
17243991915,4cyclictest0-21swapper/109:35:221
17243991914,5cyclictest0-21swapper/110:11:051
1724399191,1cyclictest0-21swapper/110:36:091
1724399190,17cyclictest26299-21/usr/sbin/munin07:25:241
1724699180,1cyclictest0-21swapper/209:30:222
17243991814,2cyclictest0-21swapper/111:17:391
1724099186,6cyclictest2906-21munin-run08:55:010
17250991715,1cyclictest31390-21ssh10:00:153
1725099170,16cyclictest0-21swapper/309:14:443
1724699171,1cyclictest10051-21diskmemload10:28:252
1724699171,11cyclictest26971-21/usr/sbin/munin10:35:212
1724699170,16cyclictest0-21swapper/210:32:492
1724399178,5cyclictest10060-21grep08:00:171
17243991715,1cyclictest0-21swapper/109:55:391
1724099170,0cyclictest0-21swapper/011:50:380
1725099160,1cyclictest0-21swapper/312:03:463
1724699160,16cyclictest0-21swapper/212:07:292
1724399166,7cyclictest0-21swapper/109:26:051
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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