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2026-04-01 - 02:27

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 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
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rack3slot6s.osadl.org (updated Wed Apr 01, 2026 00:43:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
8972211895,18sleep30-21swapper/319:07:503
9062211494,15sleep10-21swapper/119:09:011
8388210986,18sleep00-21swapper/019:05:350
904329988,6sleep20-21swapper/219:08:452
185292800,0sleep10-21swapper/122:09:551
115992610,1sleep111598-21ssh23:43:231
222832560,0sleep00-21swapper/023:20:170
916799231,3cyclictest31935-21ssh21:50:121
72862220,0sleep30-21swapper/323:39:093
167442220,0sleep20-21swapper/222:07:082
916999200,18cyclictest0-21swapper/300:10:073
916799200,2cyclictest0-21swapper/121:40:091
916999190,17cyclictest0-21swapper/321:20:123
72032190,0sleep10-21swapper/123:05:111
916899181,15cyclictest16670-21ssh22:40:232
916799180,16cyclictest0-21swapper/100:30:111
261032180,0sleep00-21swapper/022:16:410
9169991714,2cyclictest17459-21kworker/u8:020:01:053
9169991714,2cyclictest17459-21kworker/u8:020:01:043
916899173,2cyclictest0-21swapper/222:45:042
9168991714,2cyclictest17459-21kworker/u8:020:36:052
9167991712,3cyclictest0-21swapper/123:10:431
916799170,15cyclictest0-21swapper/122:46:021
9166991714,2cyclictest30384-21kworker/u8:123:36:050
279622170,0sleep20-21swapper/221:11:412
916999160,14cyclictest0-21swapper/321:29:593
916899161,3cyclictest22139-21interrupts00:30:152
9168991613,2cyclictest30384-21kworker/u8:123:43:042
9168991613,2cyclictest23625-21kworker/u8:221:18:052
9168991613,2cyclictest13031-21kworker/u8:200:03:052
916899161,13cyclictest0-21swapper/222:56:042
916799161,3cyclictest13367-21ssh22:04:231
9167991611,3cyclictest0-21swapper/121:46:531
9166991613,2cyclictest22079-21kworker/u8:100:02:050
916699160,2cyclictest0-21swapper/022:55:050
916999159,4cyclictest8531-21ssh23:05:453
916999153,10cyclictest24703-21kworker/3:121:15:533
9169991511,2cyclictest32034-21kworker/u8:022:22:053
916999151,12cyclictest0-21swapper/323:20:073
916999151,12cyclictest0-21swapper/320:21:033
9169991510,3cyclictest0-21swapper/319:20:183
916999150,3cyclictest0-21swapper/322:15:133
9168991512,2cyclictest9577-21kworker/u8:122:38:022
9168991512,2cyclictest9577-21kworker/u8:122:34:042
9168991512,2cyclictest7329-21kworker/u8:200:36:052
9168991512,2cyclictest4371-21kworker/u8:220:26:042
9168991512,2cyclictest28927-21kworker/u8:223:06:052
9168991512,2cyclictest23625-21kworker/u8:221:32:042
9168991512,2cyclictest17459-21kworker/u8:020:11:052
9168991512,2cyclictest17459-21kworker/u8:020:04:052
9168991512,2cyclictest17459-21kworker/u8:020:04:042
9168991512,2cyclictest16807-21kworker/u8:223:19:042
9168991512,2cyclictest15492-21kworker/u8:121:57:042
9168991512,2cyclictest15492-21kworker/u8:121:48:052
9168991512,2cyclictest0-21swapper/223:52:132
916899151,13cyclictest845-21ssh23:31:422
916899150,14cyclictest0-21swapper/219:46:022
916799151,12cyclictest29221-21sh00:01:451
916799150,13cyclictest30746-21latency22:55:181
916799150,13cyclictest0-21swapper/122:28:331
916799150,13cyclictest0-21swapper/122:20:001
916799150,13cyclictest0-21swapper/120:05:131
916699150,13cyclictest14183-21taskset21:30:590
916999149,3cyclictest18847-21ssh23:50:253
916999149,3cyclictest0-21swapper/321:40:073
916999142,6cyclictest0-21swapper/321:54:593
916999141,2cyclictest32653-21ssh22:57:173
9169991411,2cyclictest9099-21kworker/u8:021:30:023
9169991411,2cyclictest6898-21kworker/u8:219:27:053
9169991411,2cyclictest11598-21kworker/u8:123:13:053
9169991410,2cyclictest9372-21munin-node3
916999140,2cyclictest0-21swapper/322:02:543
916999140,12cyclictest19563-21sh21:36:183
916999140,12cyclictest18115-21ssh22:09:163
916999140,12cyclictest0-21swapper/300:26:093
9168991411,2cyclictest7329-21kworker/u8:200:24:042
9168991411,2cyclictest6898-21kworker/u8:219:52:052
9168991411,2cyclictest6898-21kworker/u8:219:34:042
9168991411,2cyclictest4371-21kworker/u8:220:22:052
9168991411,2cyclictest32034-21kworker/u8:022:15:052
9168991411,2cyclictest31668-21kworker/u8:000:11:052
9168991411,2cyclictest27718-21kworker/u8:119:57:042
9168991411,2cyclictest17459-21kworker/u8:020:44:042
9168991411,2cyclictest17459-21kworker/u8:020:34:022
9168991411,2cyclictest17459-21kworker/u8:019:41:042
9168991411,2cyclictest15492-21kworker/u8:121:40:042
9168991411,2cyclictest15492-21kworker/u8:121:38:052
9168991411,2cyclictest0-21swapper/223:35:432
916899140,2cyclictest0-21swapper/222:12:022
916899140,2cyclictest0-21swapper/222:00:022
916899140,2cyclictest0-21swapper/200:25:052
916899140,13cyclictest0-21swapper/223:25:232
916899140,13cyclictest0-21swapper/223:13:132
916899140,13cyclictest0-21swapper/223:00:432
916899140,13cyclictest0-21swapper/223:00:432
916899140,13cyclictest0-21swapper/222:24:022
916799149,3cyclictest2492-21latency_hist21:19:591
916799149,3cyclictest21854-21diskstats21:00:161
916799141,2cyclictest14428-21cut20:40:271
9167991411,2cyclictest0-21swapper/121:34:121
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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