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2025-11-11 - 02:09

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #3, slot #6

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
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rack3slot6s.osadl.org (updated Tue Nov 11, 2025 00:43:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
14338211694,16sleep30-21swapper/319:07:423
14396211595,14sleep10-21swapper/119:08:281
14160211394,13sleep20-21swapper/219:05:292
14390210986,18sleep00-21swapper/019:08:230
87382750,1sleep1221ktimersoftd/122:59:541
27642750,0sleep00-21swapper/000:32:370
194082670,0sleep30-21swapper/323:43:253
1454599322,17cyclictest30495-21sh23:55:122
299052280,0sleep3381ktimersoftd/322:47:503
33712250,0sleep00-21swapper/022:54:240
52182240,0sleep10-21swapper/122:22:301
1454499230,17cyclictest332250irq/24-eth122:05:041
1454599220,19cyclictest0-21swapper/219:15:152
14544992217,3cyclictest30689-21diskmemload00:10:121
1454399221,19cyclictest0-21swapper/019:40:130
1454399220,2cyclictest0-21swapper/021:35:130
1454399220,2cyclictest0-21swapper/021:35:130
1454699210,19cyclictest0-21swapper/322:25:153
14545992118,2cyclictest641-21kworker/u8:022:47:042
14544992118,2cyclictest30669-21kworker/u8:121:21:061
1454499210,19cyclictest0-21swapper/122:25:151
1454699200,2cyclictest0-21swapper/321:25:143
1454499200,2cyclictest0-21swapper/119:20:121
1454399201,2cyclictest0-21swapper/022:00:120
14545991916,2cyclictest3523-21kworker/u8:221:46:042
14545991916,2cyclictest30982-21kworker/u8:120:32:012
14545991916,2cyclictest19915-21kworker/u8:123:34:042
14545991916,2cyclictest13017-21kworker/u8:022:01:042
14545991916,2cyclictest1106-21kworker/u8:220:10:042
1454599190,2cyclictest0-21swapper/221:35:142
1454599190,2cyclictest0-21swapper/221:35:132
1454599190,14cyclictest0-21swapper/220:06:012
1454499191,2cyclictest0-21swapper/123:38:021
14545991815,2cyclictest8722-21kworker/u8:020:24:042
14545991815,2cyclictest641-21kworker/u8:022:35:042
14545991815,2cyclictest3523-21kworker/u8:221:59:052
14545991815,2cyclictest29093-21kworker/u8:100:31:042
14545991815,2cyclictest27459-21kworker/u8:122:59:042
14545991815,2cyclictest27459-21kworker/u8:122:51:042
14545991815,2cyclictest27020-21kworker/u8:019:51:052
14545991815,2cyclictest25612-21kworker/u8:019:11:042
14545991815,2cyclictest24459-21kworker/u8:123:52:052
14545991815,2cyclictest24374-21kworker/u8:119:37:042
14545991815,2cyclictest22977-21kworker/u8:120:58:042
14545991815,2cyclictest22977-21kworker/u8:120:53:042
14545991815,2cyclictest22282-21kworker/u8:019:26:052
14545991815,2cyclictest19915-21kworker/u8:123:39:042
14545991815,2cyclictest18786-21kworker/u8:220:42:042
14545991815,2cyclictest18785-21kworker/u8:219:22:042
14545991815,2cyclictest15618-21kworker/u8:121:30:042
14545991815,2cyclictest15618-21kworker/u8:121:30:042
1454599180,14cyclictest0-21swapper/223:01:042
1454499180,2cyclictest0-21swapper/121:25:141
14545991714,2cyclictest8722-21kworker/u8:020:48:042
14545991714,2cyclictest7350-21kworker/u8:222:33:042
14545991714,2cyclictest30982-21kworker/u8:120:38:042
14545991714,2cyclictest30982-21kworker/u8:120:19:052
14545991714,2cyclictest30752-21kworker/u8:223:27:042
14545991714,2cyclictest24459-21kworker/u8:100:01:042
14545991714,2cyclictest24374-21kworker/u8:119:32:042
14545991714,2cyclictest18786-21kworker/u8:221:08:012
14545991714,2cyclictest18785-21kworker/u8:219:49:042
14545991714,2cyclictest1379-21kworker/u8:223:12:042
1454599170,2cyclictest0-21swapper/221:42:042
1454599170,2cyclictest0-21swapper/221:14:052
1454599170,16cyclictest0-21swapper/223:43:042
1454599170,13cyclictest0-21swapper/221:21:022
1454599170,12cyclictest0-21swapper/222:42:012
1454599170,12cyclictest0-21swapper/221:15:042
14544991714,2cyclictest3523-21kworker/u8:221:19:041
14545991613,2cyclictest8722-21kworker/u8:020:28:052
1454599160,13cyclictest0-21swapper/221:53:042
1454599160,11cyclictest0-21swapper/200:05:042
14544991613,2cyclictest19915-21kworker/u8:123:21:041
14544991612,2cyclictest30982-21kworker/u8:120:39:041
1454499161,13cyclictest25263-21apt-get23:50:051
1454499161,13cyclictest0-21swapper/122:20:011
1454499160,4cyclictest0-21swapper/100:20:051
1454499160,4cyclictest0-21swapper/100:20:041
1454399161,13cyclictest0-21swapper/019:35:250
1454699151,2cyclictest5129-21runrttasks23:18:203
14546991510,3cyclictest18568-21cat19:19:593
1454699150,13cyclictest0-21swapper/323:50:063
1454699150,13cyclictest0-21swapper/321:05:163
1454699150,13cyclictest0-21swapper/319:30:153
14545991512,2cyclictest26898-21kworker/u8:222:13:042
14545991512,2cyclictest22596-21kworker/u8:000:22:042
14545991512,2cyclictest22596-21kworker/u8:000:22:042
1454599151,12cyclictest4316-21munin-run20:05:002
1454599150,2cyclictest0-21swapper/222:21:042
1454499158,2cyclictest21-21rcuc/121:39:041
1454499158,2cyclictest21-21rcuc/121:39:041
14544991512,2cyclictest30669-21kworker/u8:121:14:011
14544991512,2cyclictest13983-21kworker/u8:200:17:041
14544991510,3cyclictest0-21swapper/123:30:251
14544991510,3cyclictest0-21swapper/121:48:341
1454399151,3cyclictest24550-21ssh00:21:110
1454399151,3cyclictest24550-21ssh00:21:110
1454399151,3cyclictest0-21swapper/023:46:420
14543991510,3cyclictest14790-21munin-node0
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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