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2026-06-11 - 18:01

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 Thu Jun 11, 2026 12:43:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2211621440,5sleep2176099cyclictest12:10:132
1659521370,2sleep1175999cyclictest10:53:041
1512211997,17sleep00-21swapper/007:07:120
1662211794,18sleep10-21swapper/107:09:091
1470211296,11sleep30-21swapper/307:06:393
529621050,0sleep30-21swapper/309:30:123
159129979,15sleep20-21swapper/207:08:142
287422840,1sleep20-21swapper/208:15:122
171412790,0sleep10-21swapper/112:05:031
260552780,2sleep0175899cyclictest10:28:140
110662720,0sleep00-21swapper/008:50:150
325012290,1sleep30-21swapper/309:25:123
173042220,0sleep10-21swapper/111:30:001
1760992118,2cyclictest31303-21kworker/u8:010:06:042
1760992118,2cyclictest29883-21kworker/u8:110:34:012
1760992118,2cyclictest23684-21kworker/u8:209:56:032
176099210,4cyclictest0-21swapper/210:44:012
176199201,17cyclictest0-21swapper/311:15:103
176199200,2cyclictest0-21swapper/310:00:123
1760992017,2cyclictest9976-21kworker/u8:208:04:042
1760992017,2cyclictest5886-21kworker/u8:009:32:032
1760992017,2cyclictest5886-21kworker/u8:009:26:042
1760992017,2cyclictest5886-21kworker/u8:009:10:012
1760992017,2cyclictest32706-21kworker/u8:012:17:042
1760992017,2cyclictest32706-21kworker/u8:011:47:052
1760992017,2cyclictest1905-21kworker/u8:209:41:042
1760992017,2cyclictest18968-21kworker/u8:010:36:062
176099201,2cyclictest0-21swapper/209:39:052
175899200,2cyclictest0-21swapper/007:35:110
176199190,2cyclictest0-21swapper/309:55:103
1760991916,2cyclictest5886-21kworker/u8:009:18:052
1760991916,2cyclictest4496-21kworker/u8:210:26:042
1760991916,2cyclictest4496-21kworker/u8:210:19:052
1760991916,2cyclictest31397-21kworker/u8:207:15:042
1760991916,2cyclictest31303-21kworker/u8:010:01:052
1760991916,2cyclictest31077-21kworker/u8:211:26:062
1760991916,2cyclictest29883-21kworker/u8:110:46:012
1760991916,2cyclictest28010-21kworker/u8:211:50:012
1760991916,2cyclictest16202-21kworker/u8:109:22:042
1760991916,2cyclictest16202-21kworker/u8:109:07:032
1760991916,2cyclictest15965-21kworker/u8:107:56:042
1760991916,2cyclictest1081-21kworker/u8:108:32:042
1760991915,3cyclictest5886-21kworker/u8:009:04:012
1758991916,2cyclictest4496-21kworker/u8:210:23:050
1758991916,2cyclictest4496-21kworker/u8:210:23:050
1758991916,2cyclictest3463-21kworker/u8:210:58:030
1758991916,2cyclictest29883-21kworker/u8:110:45:050
175899190,2cyclictest0-21swapper/010:38:010
176099182,2cyclictest0-21swapper/211:24:042
1760991815,2cyclictest9976-21kworker/u8:207:36:012
1760991815,2cyclictest9976-21kworker/u8:207:32:042
1760991815,2cyclictest7881-21kworker/u8:107:27:042
1760991815,2cyclictest3384-21kworker/u8:011:40:042
1760991815,2cyclictest32706-21kworker/u8:012:09:052
1760991815,2cyclictest30150-21kworker/u8:208:48:042
1760991815,2cyclictest29883-21kworker/u8:110:52:042
1760991815,2cyclictest24301-21kworker/u8:108:05:042
1760991815,2cyclictest23840-21kworker/u8:212:35:052
1760991815,2cyclictest23684-21kworker/u8:209:54:052
1760991815,2cyclictest22632-21kworker/u8:111:13:042
1760991815,2cyclictest22632-21kworker/u8:111:04:042
1760991815,2cyclictest22263-21kworker/u8:008:11:042
1760991815,2cyclictest16657-21kworker/u8:010:55:052
1760991815,2cyclictest11194-21kworker/u8:211:59:042
1760991815,2cyclictest1081-21kworker/u8:108:35:042
1760991714,2cyclictest9976-21kworker/u8:207:43:042
1760991714,2cyclictest5886-21kworker/u8:008:58:042
1760991714,2cyclictest31077-21kworker/u8:211:18:042
1760991714,2cyclictest30900-21kworker/u8:112:25:052
1760991714,2cyclictest17210-21kworker/u8:009:48:052
1760991714,2cyclictest16972-21kworker/u8:111:35:052
1760991714,2cyclictest1081-21kworker/u8:108:29:042
176099170,2cyclictest0-21swapper/212:32:012
1758991714,2cyclictest29883-21kworker/u8:110:44:020
176199161,12cyclictest0-21swapper/312:35:143
1760991613,2cyclictest9976-21kworker/u8:207:52:042
1760991613,2cyclictest30900-21kworker/u8:112:24:042
1760991613,2cyclictest22263-21kworker/u8:008:22:012
1760991611,3cyclictest0-21swapper/207:46:022
176099160,2cyclictest0-21swapper/211:34:032
176099160,2cyclictest0-21swapper/210:20:042
176099160,2cyclictest0-21swapper/210:20:032
176099160,2cyclictest0-21swapper/210:10:042
175999161,3cyclictest3909-21copy10:40:011
1758991613,2cyclictest8279-21kworker/u8:109:39:050
1758991613,2cyclictest5886-21kworker/u8:009:29:050
71752150,1sleep30-21swapper/310:42:403
176199152,8cyclictest18089-21ssh09:45:003
1761991511,2cyclictest0-21swapper/309:05:053
176199151,12cyclictest0-21swapper/308:55:163
176199150,13cyclictest0-21swapper/311:36:043
1760991512,2cyclictest30150-21kworker/u8:208:40:032
1760991512,2cyclictest16657-21kworker/u8:011:07:032
1760991512,2cyclictest10130-21kworker/u8:108:51:042
175999151,2cyclictest3413-21apt-get11:50:101
175999151,12cyclictest7832-21apt-get11:55:061
175999151,12cyclictest16274-21munin-run07:44:591
1759991510,3cyclictest0-21swapper/111:33:161
175999150,3cyclictest9583-21ssh12:31:021
175999150,2cyclictest0-21swapper/111:48:031
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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