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2026-05-30 - 15:11

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 Sat May 30, 2026 12:43:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
11831211694,16sleep20-21swapper/207:07:332
10742211691,19sleep00-21swapper/007:05:150
118322115104,6sleep30-21swapper/307:07:353
11828210279,6sleep10-21swapper/107:07:321
48302810,2sleep14831-21sh10:59:261
48302810,2sleep14831-21sh10:59:261
60872760,0sleep10-21swapper/111:34:131
66652690,0sleep00-21swapper/010:27:020
282332660,0sleep20-21swapper/211:56:232
1204799340,2cyclictest0-21swapper/009:00:100
258392250,0sleep2301ktimersoftd/212:28:012
1204899232,16cyclictest0-21swapper/109:20:041
1204899221,19cyclictest0-21swapper/112:30:101
1205099210,19cyclictest0-21swapper/312:30:113
1205099200,18cyclictest0-21swapper/310:45:113
1204999201,2cyclictest0-21swapper/209:42:052
1204899200,2cyclictest0-21swapper/109:05:121
1204899200,18cyclictest28338-21diskmemload10:30:041
1204799200,2cyclictest0-21swapper/011:50:120
127472190,1sleep20-21swapper/210:33:582
1205099191,16cyclictest16230-21sendmail08:40:003
12049991916,2cyclictest7298-21kworker/u8:209:24:042
12049991916,2cyclictest28582-21kworker/u8:009:49:042
12049991916,2cyclictest18345-21kworker/u8:207:46:052
12048991916,2cyclictest3374-21kworker/u8:211:40:041
12048991916,2cyclictest25000-21kworker/u8:210:22:041
12048991916,2cyclictest12507-21kworker/u8:109:35:041
12048991916,2cyclictest11645-21kworker/u8:110:42:041
1204899190,2cyclictest0-21swapper/109:42:051
1204899190,17cyclictest0-21swapper/109:17:041
1204799190,2cyclictest0-21swapper/008:20:110
1205099180,16cyclictest0-21swapper/311:59:493
12049991815,2cyclictest3374-21kworker/u8:211:36:012
12049991815,2cyclictest29066-21kworker/u8:012:37:042
12049991815,2cyclictest28917-21kworker/u8:111:30:042
12049991815,2cyclictest25000-21kworker/u8:210:18:042
12049991815,2cyclictest24628-21kworker/u8:210:55:042
12049991815,2cyclictest24628-21kworker/u8:210:55:042
12049991815,2cyclictest18345-21kworker/u8:207:34:042
12049991815,2cyclictest13616-21kworker/u8:011:26:042
1204999181,2cyclictest0-21swapper/211:10:052
1204999181,2cyclictest0-21swapper/211:10:052
1204999180,2cyclictest0-21swapper/211:05:042
1204999180,2cyclictest0-21swapper/211:05:042
12048991815,2cyclictest8571-21kworker/u8:310:09:041
12048991815,2cyclictest28917-21kworker/u8:111:28:041
12048991815,2cyclictest28283-21kworker/u8:008:16:041
12048991815,2cyclictest22680-21kworker/u8:012:08:041
1204899180,2cyclictest0-21swapper/111:05:041
1204899180,2cyclictest0-21swapper/111:05:041
1204899180,17cyclictest0-21swapper/109:32:051
1204899180,13cyclictest0-21swapper/107:56:011
12049991714,2cyclictest9459-21kworker/u8:312:15:042
12049991714,2cyclictest7928-21kworker/u8:108:24:042
12049991714,2cyclictest3274-21kworker/u8:208:15:052
12049991714,2cyclictest3274-21kworker/u8:208:08:042
12049991714,2cyclictest28283-21kworker/u8:007:58:042
12049991714,2cyclictest22680-21kworker/u8:012:03:042
12049991714,2cyclictest21491-21kworker/u8:007:29:042
12049991714,2cyclictest20541-21kworker/u8:009:03:042
12049991714,2cyclictest19457-21kworker/u8:010:08:042
12049991714,2cyclictest13616-21kworker/u8:011:21:042
12049991714,2cyclictest12507-21kworker/u8:109:51:042
12049991714,2cyclictest12507-21kworker/u8:109:27:042
12049991713,3cyclictest16697-21kworker/u8:012:23:042
1204999171,2cyclictest0-21swapper/210:45:042
12048991714,2cyclictest599-21kworker/u8:310:28:041
12048991714,2cyclictest23860-21kworker/u8:311:20:041
12048991714,2cyclictest1225-21kworker/u8:112:12:041
1204899170,2cyclictest15088-21sh11:10:051
1204899170,2cyclictest15088-21sh11:10:051
1205099161,13cyclictest30886-21grep07:55:133
12050991611,3cyclictest0-21swapper/312:25:203
1205099160,14cyclictest0-21swapper/310:43:193
12049991613,2cyclictest7928-21kworker/u8:108:25:042
12049991613,2cyclictest28582-21kworker/u8:009:58:052
12049991613,2cyclictest2184-21kworker/u8:109:18:012
12049991613,2cyclictest19457-21kworker/u8:010:10:042
12049991613,2cyclictest14034-21kworker/u8:108:55:042
12049991613,2cyclictest14034-21kworker/u8:108:44:052
12049991613,2cyclictest14034-21kworker/u8:108:35:042
12049991613,2cyclictest10504-21kworker/u8:208:31:042
1204899161,3cyclictest0-21swapper/109:45:141
12048991613,2cyclictest9275-21kworker/u8:111:49:051
12048991613,2cyclictest7311-21kworker/u8:211:01:041
12048991613,2cyclictest4260-21kworker/u8:107:25:041
12048991613,2cyclictest318-21kworker/u8:108:05:051
12048991613,2cyclictest28582-21kworker/u8:009:57:041
12048991613,2cyclictest28283-21kworker/u8:008:27:041
12048991613,2cyclictest28283-21kworker/u8:007:54:041
12048991613,2cyclictest22454-21kworker/u8:107:36:051
12048991613,2cyclictest21491-21kworker/u8:007:18:041
12048991613,2cyclictest21491-21kworker/u8:007:12:011
1204899160,2cyclictest23120-21copy10:45:041
1204899160,2cyclictest0-21swapper/112:21:041
12047991613,2cyclictest9459-21kworker/u8:312:24:010
1204799160,2cyclictest0-21swapper/012:17:040
1205099151,12cyclictest21250-21memory08:50:173
12050991510,3cyclictest694-21turbostat09:15:003
1205099150,13cyclictest0-21swapper/311:04:093
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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