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2026-09-20 - 14:42

OSADL QA Farm on Real-time of Mainline Linux

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

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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  Phytec
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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.

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 rackbslot5s.osadl.org (updated Sun Sep 20, 2026 00:44:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
435201995539,12cyclictest391ktimers/323:10:133
435198994839,5cyclictest490303-21unixbench_singl21:45:252
435189994836,9cyclictest438-21cron23:50:000
435201994535,6cyclictest532111-21ls23:50:003
435201994535,6cyclictest459587-21cron20:20:013
435198994433,6cyclictest457470-21grep20:10:252
435198994335,4cyclictest0-21swapper/219:40:002
435198994028,8cyclictest500493-21grep22:15:252
435189993931,5cyclictest459595-21auditctl20:20:010
435189993926,10cyclictest121ktimers/022:10:160
435198993821,12cyclictest0-21swapper/220:00:132
435189993831,4cyclictest482225-21idleruntime-cro21:25:010
435189993827,7cyclictest529964-21grep23:40:240
435198993727,6cyclictest0-21swapper/200:40:012
435189993724,9cyclictest474752-21grep21:00:270
435201993628,4cyclictest0-21swapper/322:00:143
435201993627,4cyclictest0-21swapper/321:07:233
435201993625,6cyclictest0-21swapper/319:15:263
435201993623,8cyclictest487318-21auditctl21:40:003
435198993627,3cyclictest0-21swapper/221:05:172
435198993625,8cyclictest526982-21auditctl23:35:012
435198993617,14cyclictest0-21swapper/223:20:132
435198993613,5cyclictest513802-21meminfo22:55:182
435189993628,5cyclictest0-21swapper/021:45:250
435201993528,4cyclictest0-21swapper/319:10:253
435201993527,4cyclictest0-21swapper/319:20:253
435198993528,4cyclictest532337-21apt-get23:50:122
435198993527,4cyclictest454726-21apt-get20:05:152
435198993527,4cyclictest0-21swapper/219:25:012
435198993526,5cyclictest442122-21head19:25:272
435198993525,7cyclictest531762-21cron23:46:002
435193993528,4cyclictest0-21swapper/119:30:001
435193993527,4cyclictest0-21swapper/120:25:231
435193993526,4cyclictest0-21swapper/119:10:161
435193993525,7cyclictest452298-21grep19:55:271
435189993527,4cyclictest0-21swapper/019:45:290
435189993527,4cyclictest0-21swapper/019:45:290
435201993426,4cyclictest0-21swapper/319:57:193
43519899347,10cyclictest501393-21grep22:20:162
435198993425,4cyclictest0-21swapper/220:35:172
435198993422,7cyclictest0-21swapper/221:40:002
435198993419,12cyclictest459850-21apt-get20:20:162
435193993427,3cyclictest0-21swapper/120:20:011
435193993426,4cyclictest0-21swapper/121:35:001
435193993425,5cyclictest0-21swapper/100:20:011
435201993326,4cyclictest0-21swapper/322:45:253
435201993325,4cyclictest0-21swapper/323:40:243
435201993324,5cyclictest0-21swapper/320:05:243
435201993323,7cyclictest0-21swapper/300:20:013
435201993323,6cyclictest526978-21sh23:35:013
435198993326,3cyclictest0-21swapper/200:20:012
435198993324,5cyclictest547393-21grep00:30:262
435198993323,7cyclictest504963-21/usr/sbin/munin22:30:172
435198993323,7cyclictest487571-21apt-get21:40:142
435198993320,9cyclictest435440-21/usr/sbin/munin19:10:142
435198993313,16cyclictest462813-21grep20:25:232
435193993322,7cyclictest529944-21grep23:40:241
435193993322,6cyclictest0-21swapper/120:10:251
435189993325,4cyclictest466156-21grep20:35:260
435189993317,14cyclictest11-21ksoftirqd/019:25:140
435201993225,4cyclictest0-21swapper/323:20:263
435201993222,7cyclictest0-21swapper/323:20:003
435201993222,7cyclictest0-21swapper/300:30:003
435198993226,3cyclictest466879-21apt-get20:40:122
435198993225,4cyclictest523814-21apt-get23:25:122
435198993220,8cyclictest438658-21grep19:15:262
435198993220,7cyclictest535081-21grep23:55:262
435198993220,7cyclictest535081-21grep23:55:262
435198993219,10cyclictest537020-21sshd00:02:372
435198993219,10cyclictest491102-21/usr/sbin/munin21:50:162
435198993219,10cyclictest484671-21/usr/sbin/munin21:30:222
435198993219,10cyclictest471030-21sensors_temp20:50:232
435198993218,8cyclictest480283-21apt-get21:20:062
435198993218,11cyclictest497798-21/usr/sbin/munin22:10:292
435193993226,4cyclictest473447-21cron21:00:001
435193993224,4cyclictest0-21swapper/123:22:351
435193993224,4cyclictest0-21swapper/121:00:181
435193993224,4cyclictest0-21swapper/120:35:261
435193993223,5cyclictest490315-21grep21:45:251
435189993224,4cyclictest0-21swapper/023:00:260
435189993222,6cyclictest535044-21grep23:55:260
435189993222,6cyclictest535044-21grep23:55:260
435189993221,6cyclictest0-21swapper/022:30:240
435201993122,5cyclictest503957-21head22:25:253
435201993122,4cyclictest0-21swapper/320:25:013
435201993120,7cyclictest0-21swapper/321:05:003
435201993120,7cyclictest0-21swapper/319:35:003
435198993125,3cyclictest515076-21apt-get23:00:122
435198993125,3cyclictest482452-21apt-get21:25:152
435198993121,7cyclictest472326-21/usr/sbin/munin20:55:192
435198993120,8cyclictest508526-21/usr/sbin/munin22:40:172
435198993120,8cyclictest448238-21/usr/sbin/munin19:45:212
435198993120,8cyclictest448238-21/usr/sbin/munin19:45:212
435198993119,9cyclictest538533-21/usr/sbin/munin00:05:262
435198993118,10cyclictest511866-21/usr/sbin/munin22:50:182
435198993113,13cyclictest529982-21grep23:40:242
435193993123,4cyclictest549621-21sendmail00:40:001
435193993123,4cyclictest0-21swapper/119:35:261
435193993122,5cyclictest0-21swapper/120:10:001
435193993121,6cyclictest0-21swapper/122:15:001
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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