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2026-06-30 - 01:53

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, slot #3

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 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 100 highest latencies:
System rack5slot3s.osadl.org (updated Mon Jun 29, 2026 12:44:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
45462238162,25sleep00-21swapper/007:05:440
46652235162,21sleep20-21swapper/207:07:202
46912224193,20sleep30-21swapper/307:07:413
29172203165,25sleep10-21swapper/107:05:101
1871221850,5sleep3497799cyclictest11:20:123
1539021800,5sleep3497799cyclictest08:45:133
4971997876,1cyclictest0-21swapper/208:58:502
4971996260,1cyclictest0-21swapper/211:04:402
173322450,1sleep30-21swapper/310:00:263
496299399,14cyclictest20669-21munin-run11:25:010
4971993532,2cyclictest0-21swapper/209:31:382
496299352,26cyclictest24115-21kworker/0:110:27:330
4977993214,8cyclictest25017-21users07:50:253
497799321,18cyclictest0-21swapper/308:56:523
4971993229,2cyclictest0-21swapper/207:33:162
4971993229,2cyclictest0-21swapper/207:33:162
497799312,11cyclictest0-21swapper/312:18:253
496299301,10cyclictest14477-21kworker/0:112:23:490
496299292,15cyclictest8439-21munin-run08:30:010
497799281,24cyclictest0-21swapper/310:46:413
497799281,23cyclictest26019-21diskmemload09:15:203
496699281,6cyclictest25017-21diskstats10:20:161
496699281,11cyclictest0-21swapper/110:38:351
496299281,9cyclictest17702-21kworker/0:310:10:370
497799275,4cyclictest0-21swapper/309:45:263
497799271,16cyclictest21082-21irqstats10:10:173
496699278,10cyclictest0-21swapper/112:30:191
496699277,12cyclictest0-21swapper/110:27:201
4966992713,6cyclictest32269-21systemd-journal09:20:411
496299278,3cyclictest31023-21kworker/0:210:40:250
496299278,10cyclictest24292-21kworker/0:209:15:130
496299274,3cyclictest6052-21kworker/0:208:44:570
496299274,3cyclictest6052-21kworker/0:208:44:570
496299272,11cyclictest25057-21kworker/0:107:55:170
496299272,10cyclictest14477-21kworker/0:112:30:010
496299271,4cyclictest5642-21kworker/0:112:09:010
496299271,10cyclictest18710-21kworker/0:107:40:250
4962992710,4cyclictest16088-21kworker/0:211:15:170
497199263,8cyclictest12355-40dnf12:18:252
496699263,16cyclictest87550irq/128-enp1s0-11:45:151
496299269,15cyclictest26019-21diskmemload12:40:010
496299261,12cyclictest32361-21kworker/0:208:14:130
496299261,10cyclictest3394-21kworker/0:311:59:170
497799252,20cyclictest0-21swapper/308:00:423
497799251,21cyclictest4264-21/usr/sbin/munin08:20:123
497799251,21cyclictest0-21swapper/310:52:053
497799251,11cyclictest8861-21sshd09:42:413
497799251,11cyclictest31714-21ntp_states09:20:223
497799251,11cyclictest24052-21/usr/sbin/munin09:05:123
497799251,11cyclictest2053-21df11:55:133
497799251,11cyclictest13173-21ntp_states11:05:213
497799251,11cyclictest13173-21ntp_states11:05:213
497799250,7cyclictest4482-21kworker/u8:309:50:213
4966992514,7cyclictest0-21swapper/109:16:441
496699251,18cyclictest0-21swapper/110:49:411
496699251,17cyclictest0-21swapper/112:12:181
496699250,7cyclictest0-21swapper/111:53:301
496299251,2cyclictest16000-21kworker/0:107:17:530
496299251,10cyclictest24836-21kworker/0:111:36:160
497799242,11cyclictest2065-21/usr/sbin/munin08:15:173
497799242,11cyclictest14741-21ntp_states09:55:213
497799242,11cyclictest14741-21ntp_states09:55:213
497799242,11cyclictest10861-21/usr/sbin/munin08:35:273
497799242,10cyclictest32226-21/usr/sbin/munin08:10:153
497799241,20cyclictest26019-21diskmemload11:31:433
497799241,16cyclictest0-21swapper/312:04:233
497799241,14cyclictest0-21swapper/308:44:573
497799241,14cyclictest0-21swapper/308:44:573
497799241,13cyclictest9802-21latency_hist11:00:013
497799241,12cyclictest0-21swapper/307:15:333
497799241,11cyclictest27931-21ntp_states10:25:223
497799241,11cyclictest12722-21/usr/sbin/munin12:20:133
497799241,11cyclictest10250-21/usr/sbin/munin07:20:263
497799240,7cyclictest0-21swapper/310:41:133
497799240,6cyclictest0-21swapper/310:21:393
497199241,20cyclictest0-21swapper/207:10:162
496699245,4cyclictest14579-21sshd12:23:401
496699242,17cyclictest87550irq/128-enp1s0-09:47:371
496699241,16cyclictest6528-21kworker/u8:211:20:451
496699241,12cyclictest0-21swapper/109:41:591
496699240,17cyclictest0-21swapper/108:05:171
496299249,3cyclictest19335-21kworker/0:109:07:330
496299248,3cyclictest30355-21kworker/0:109:20:250
497799239,3cyclictest7787-21sshd12:06:093
497799237,3cyclictest0-21swapper/312:12:213
4977992316,4cyclictest23828-21/usr/sbin/munin09:05:003
497799231,19cyclictest0-21swapper/311:42:343
497799231,13cyclictest0-21swapper/310:05:133
497799231,11cyclictest4882-21/usr/sbin/munin09:35:223
497799231,11cyclictest19039-21/usr/sbin/munin07:40:183
497799231,11cyclictest0-21swapper/312:28:103
497799231,11cyclictest0-21swapper/310:35:583
497799231,11cyclictest0-21swapper/309:13:023
497799231,10cyclictest30032-21/usr/sbin/munin08:05:203
497799231,10cyclictest26019-21diskmemload09:25:143
497799230,6cyclictest0-21swapper/311:38:413
496699238,4cyclictest6622-21cpuspeed_turbos08:25:121
496699231,20cyclictest0-21swapper/107:50:111
4966992311,6cyclictest6528-21kworker/u8:212:35:051
496699231,16cyclictest0-21swapper/111:03:311
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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