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2025-12-28 - 04:09

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 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 Sun Dec 28, 2025 00:43:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
9222211998,14sleep30-21swapper/319:05:303
93682116105,6sleep00-21swapper/019:07:250
9313211292,15sleep20-21swapper/219:06:422
943129881,12sleep10-21swapper/119:08:141
151092890,1sleep2301ktimersoftd/221:35:062
280812350,1sleep128080-21ssh00:19:351
960299320,30cyclictest0-21swapper/219:30:122
286022250,1sleep20-21swapper/222:27:172
187332230,0sleep10-21swapper/100:08:171
960299221,19cyclictest0-21swapper/200:00:122
960499211,18cyclictest0-21swapper/323:40:123
960499210,19cyclictest0-21swapper/322:00:153
9602992111,2cyclictest12-21rcu_preempt22:22:552
960299200,2cyclictest0-21swapper/223:25:142
960299200,13cyclictest0-21swapper/223:00:052
960199200,18cyclictest0-21swapper/123:35:111
960099200,2cyclictest0-21swapper/020:20:120
150642200,1sleep10-21swapper/100:04:241
960299190,2cyclictest0-21swapper/220:10:132
318732190,1sleep30-21swapper/323:45:263
9600991813,3cyclictest17734-21ssh23:30:120
960099180,2cyclictest0-21swapper/023:25:140
9601991714,2cyclictest23366-21kworker/u8:022:27:041
960499161,13cyclictest0-21swapper/321:55:003
960499160,14cyclictest0-21swapper/322:36:453
960299161,3cyclictest6675-21snmpd23:16:592
960199161,6cyclictest0-21swapper/122:50:001
960199161,13cyclictest0-21swapper/123:20:131
9600991611,3cyclictest1936-21turbostat22:35:000
48632160,0sleep30-21swapper/323:51:513
320342160,1sleep20-21swapper/221:16:062
320342160,1sleep20-21swapper/221:16:062
960499151,3cyclictest26983-21ssh22:25:183
9604991512,2cyclictest0-21swapper/300:22:053
960499151,12cyclictest14837-21apt-get21:35:073
9604991511,2cyclictest0-21swapper/321:25:173
960499150,3cyclictest30124-21munin-node3
960499150,3cyclictest30124-21munin-node3
960499150,13cyclictest17516-21ls23:30:023
960499150,13cyclictest11239-21vmstat20:30:293
960499150,13cyclictest0-21swapper/322:13:353
9602991512,2cyclictest0-21swapper/223:11:352
960299151,12cyclictest24134-21ssh23:36:302
960299150,13cyclictest25700-21diskmemload21:30:252
960299150,13cyclictest24775-21sed19:45:192
960299150,13cyclictest0-21swapper/222:04:552
960299150,13cyclictest0-21swapper/219:10:152
960199151,3cyclictest25700-21diskmemload00:37:181
9601991512,2cyclictest25700-21diskmemload22:20:541
9601991512,2cyclictest0-21swapper/119:45:141
960199151,12cyclictest28589-21df_abs21:50:171
9601991510,3cyclictest0-21swapper/120:00:201
960199150,13cyclictest30064-21taskset21:15:041
960199150,13cyclictest30064-21taskset21:15:041
960199150,13cyclictest25700-21diskmemload00:23:341
960199150,13cyclictest10724-21ssh22:44:541
960199150,13cyclictest0-21swapper/122:57:341
960199150,13cyclictest0-21swapper/100:25:121
316962150,1sleep20-21swapper/222:30:252
960499149,3cyclictest22685-21ssh22:58:083
960499142,6cyclictest0-21swapper/320:45:003
9604991410,2cyclictest0-21swapper/320:50:133
960499140,2cyclictest0-21swapper/323:08:353
960499140,2cyclictest0-21swapper/321:24:253
960499140,2cyclictest0-21swapper/320:00:153
960499140,12cyclictest25700-21diskmemload22:53:443
960499140,12cyclictest0-21swapper/323:56:293
960499140,12cyclictest0-21swapper/323:31:533
960499140,12cyclictest0-21swapper/323:21:373
960499140,12cyclictest0-21swapper/323:15:303
960499140,12cyclictest0-21swapper/322:46:423
960499140,12cyclictest0-21swapper/322:40:533
960499140,12cyclictest0-21swapper/322:09:503
960499140,12cyclictest0-21swapper/321:56:573
960499140,12cyclictest0-21swapper/321:40:383
960499140,12cyclictest0-21swapper/321:33:143
960499140,12cyclictest0-21swapper/321:13:543
960499140,12cyclictest0-21swapper/300:06:383
960299149,3cyclictest0-21swapper/223:41:172
9602991411,2cyclictest0-21swapper/223:46:162
9602991411,2cyclictest0-21swapper/223:32:062
9602991411,2cyclictest0-21swapper/223:20:352
9602991411,2cyclictest0-21swapper/222:47:252
9602991411,2cyclictest0-21swapper/222:39:252
9602991410,2cyclictest20129-21ssh22:17:332
960299140,2cyclictest25700-21diskmemload22:57:352
960299140,13cyclictest0-21swapper/200:33:362
960299140,12cyclictest25700-21diskmemload22:51:032
960299140,12cyclictest22446-21ssh21:43:032
960299140,12cyclictest0-21swapper/221:58:122
960299140,12cyclictest0-21swapper/221:13:192
960299140,12cyclictest0-21swapper/200:05:292
9601991411,2cyclictest0-21swapper/122:10:141
960199140,13cyclictest0-21swapper/121:10:341
960199140,12cyclictest25700-21diskmemload21:40:161
960199140,12cyclictest0-21swapper/123:41:491
960199140,12cyclictest0-21swapper/121:59:091
960099149,3cyclictest12347-21switchtime22:45:230
960099142,7cyclictest0-21swapper/022:30:000
960099142,6cyclictest0-21swapper/020:05:000
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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