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2025-08-29 - 12:02

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #c, 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 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 rackcslot7s.osadl.org (updated Fri Aug 29, 2025 00:44:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
396992699942,88cyclictest854-21avahi-daemon19:35:023
396943829167,16sleep10-21swapper/119:05:511
3969926999082,5cyclictest0-21swapper/319:39:483
3969926998879,5cyclictest0-21swapper/319:48:213
396992199832,22cyclictest1753-21gnome-shell19:40:232
396992199832,22cyclictest1753-21gnome-shell19:40:232
40793562810,7sleep01753-21gnome-shell00:15:240
39970932810,7sleep13984415-21kworker/1:120:25:141
39970932810,7sleep13984415-21kworker/1:120:25:141
40167082790,9sleep01753-21gnome-shell21:20:190
3969926997871,5cyclictest0-21swapper/319:44:243
3969926997871,5cyclictest0-21swapper/319:44:233
396990999771,15cyclictest2197014-21PK-Backend19:34:200
396992199752,13cyclictest1753-21gnome-shell19:51:152
162399720,5rtkit-daemon2197014-21PK-Backend23:42:263
162399720,59rtkit-daemon0-21swapper/319:07:313
3969913997165,4cyclictest0-21swapper/119:48:091
3969913997111,7cyclictest141rcu_preempt19:43:221
3969913997111,7cyclictest141rcu_preempt19:43:211
3969926997060,6cyclictest3984321-21apt-get19:50:083
396959427040,24sleep20-21swapper/219:07:532
396990999672,21cyclictest1753-21gnome-shell19:50:490
396990999662,58cyclictest1753-21gnome-shell19:40:330
396990999662,58cyclictest1753-21gnome-shell19:40:330
396992199652,21cyclictest1753-21gnome-shell19:35:372
396868526548,9sleep00-21swapper/019:05:160
396990999642,56cyclictest1753-21gnome-shell19:45:300
396992199631,20cyclictest1753-21gnome-shell19:45:262
3969913996210,11cyclictest3985252-21smartctl19:50:221
3969909996229,10cyclictest13-21ksoftirqd/019:36:080
162399610,9rtkit-daemon1622-21rtkit-daemon00:31:341
40748092600,14chrt42-21ksoftirqd/300:03:403
40748092600,14chrt42-21ksoftirqd/300:03:403
396992199592,19cyclictest1753-21gnome-shell19:34:052
396991399582,52cyclictest3979134-21sed19:35:011
396991399582,14cyclictest3979509-21tr19:35:151
396992699570,16cyclictest1753-21gnome-shell21:17:273
40670662560,6sleep14067070-21needreboot23:40:231
162399550,8rtkit-daemon1622-21rtkit-daemon21:33:510
162399550,8rtkit-daemon1622-21rtkit-daemon00:38:521
396992699546,10cyclictest4071521-21sed23:55:013
40311502530,6sleep234-21ksoftirqd/222:00:222
396991399530,50cyclictest1622-21rtkit-daemon22:44:391
162399530,8rtkit-daemon1622-21rtkit-daemon21:33:111
162399530,8rtkit-daemon1622-21rtkit-daemon00:05:210
40572372520,6sleep02197014-21PK-Backend23:15:140
3969909995129,7cyclictest0-21swapper/000:14:500
162399490,33rtkit-daemon2197014-21PK-Backend21:40:252
40287042480,7sleep21753-21gnome-shell21:55:032
396992699489,10cyclictest1753-21gnome-shell22:49:403
396991399480,44cyclictest1622-21rtkit-daemon21:36:401
40337992470,6sleep21753-21gnome-shell22:09:392
3969926994710,10cyclictest1753-21gnome-shell23:56:403
3969909994722,21cyclictest3995124-21unin-run20:20:000
40431912460,6sleep3411rcuc/322:35:163
39765442460,4sleep03976541-21ntpq19:25:240
396992699469,12cyclictest1753-21gnome-shell19:25:143
396992699468,12cyclictest1753-21gnome-shell00:05:173
396992699467,14cyclictest4007556-21wc20:55:023
396992699459,12cyclictest1753-21gnome-shell22:00:023
396992699457,12cyclictest4058751-21cat23:20:033
396992699451,17cyclictest1753-21gnome-shell22:53:303
162399450,31rtkit-daemon2197014-21PK-Backend20:36:412
396992699449,12cyclictest1753-21gnome-shell00:35:353
396992699447,17cyclictest854-21avahi-daemon23:33:053
396992699447,13cyclictest3995646-21cstates20:20:143
396992699445,17cyclictest4053746-21tr23:05:153
3969926994410,12cyclictest3994292-21head20:15:233
3969913994432,8cyclictest26-21ksoftirqd/123:40:001
162399440,30rtkit-daemon2197014-21PK-Backend21:21:032
396992699439,17cyclictest1753-21gnome-shell20:00:313
396992699438,13cyclictest4036728-21python322:15:303
396992699438,13cyclictest4036728-21python322:15:303
396992699438,12cyclictest854-21avahi-daemon21:14:033
396992699436,13cyclictest4080686-21expr00:20:163
396992699434,24cyclictest1753-21gnome-shell19:17:423
3969921994328,11cyclictest4047805-21apt-get22:50:002
3969921994315,23cyclictest438-20systemd-journal23:14:542
3969909994322,16cyclictest3242255-21gdbus21:20:000
396990999431,38cyclictest1753-21gnome-shell21:35:410
162399430,30rtkit-daemon1753-21gnome-shell22:33:253
40644132420,14sleep2331rcuc/223:35:132
40482842420,8sleep00-21swapper/022:50:040
39874052420,10sleep234-21ksoftirqd/219:55:292
396992699428,11cyclictest4059939-21users23:20:323
396992699428,10cyclictest854-21avahi-daemon22:26:053
396992699425,13cyclictest4037890-21cstates22:20:213
396992699425,13cyclictest4022559-21find21:35:343
396992699424,15cyclictest860997-21snmpd19:58:213
396992699424,15cyclictest1753-21gnome-shell20:44:273
396992699423,16cyclictest4007765-21tr20:55:123
396992699422,17cyclictest1753-21gnome-shell22:08:063
3969926994221,18cyclictest4077322-21df00:10:143
3969926994211,19cyclictest42-21ksoftirqd/319:11:433
396992699420,26cyclictest1753-21gnome-shell20:29:093
396992699420,26cyclictest1753-21gnome-shell20:29:093
396992199421,10cyclictest2197014-21PK-Backend21:50:012
3969913994232,5cyclictest26-21ksoftirqd/123:35:011
3969913994219,7cyclictest4081379-21cat00:20:311
3969913994217,22cyclictest3990880-21ntpq20:05:281
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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