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2025-11-23 - 02:53

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 Nov 23, 2025 00:43:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
31426211997,16sleep10-21swapper/119:09:411
31201211997,16sleep30-21swapper/319:06:463
29829211995,16sleep20-21swapper/219:05:132
31337211695,16sleep00-21swapper/019:08:320
291782810,0sleep30-21swapper/323:41:293
125992730,1sleep00-21swapper/000:33:210
123302720,0sleep10-21swapper/121:00:181
31481995433,19cyclictest0-21swapper/120:10:131
30302230,0sleep30-21swapper/323:14:553
31482991916,2cyclictest1883-21kworker/u8:222:09:042
31482991916,2cyclictest15069-21kworker/u8:221:35:042
4752180,1sleep20-21swapper/220:30:262
31482991815,2cyclictest24764-21kworker/u8:223:14:012
31482991815,2cyclictest13599-21kworker/u8:222:53:042
31482991714,2cyclictest7868-21kworker/u8:100:05:032
31481991712,3cyclictest27224-21uname23:05:161
3148399162,12cyclictest24780-21ssh00:11:093
3148299161,3cyclictest4369-21ssh21:31:572
3148299161,3cyclictest31723-21cut23:45:132
31481991612,2cyclictest29427-21apt-get20:25:061
3148199161,13cyclictest27599-21ssh23:40:161
3148199160,14cyclictest13639-21cut00:00:161
31483991510,3cyclictest32467-21memory20:30:173
3148399150,2cyclictest0-21swapper/321:30:113
31482991512,2cyclictest31293-21kworker/u8:023:27:042
31482991512,2cyclictest29841-21kworker/u8:121:26:052
31482991512,2cyclictest21417-21kworker/u8:122:49:042
31481991511,2cyclictest0-21swapper/100:25:261
3148199150,2cyclictest15313-21diskmemload23:50:161
3148199150,2cyclictest0-21swapper/100:31:571
3148199150,13cyclictest17752-21munin-node1
3148199150,13cyclictest0-21swapper/123:13:561
3148199150,13cyclictest0-21swapper/100:10:121
3148099151,2cyclictest8419-21ssh22:45:150
31480991512,2cyclictest0-21swapper/022:41:360
3148099150,13cyclictest0-21swapper/021:45:190
303032150,3sleep030436-21latency20:25:210
9942140,2sleep00-21swapper/023:45:480
3148399141,2cyclictest5129-21runrttasks22:18:063
3148399140,12cyclictest15313-21diskmemload00:07:293
3148399140,12cyclictest15313-21diskmemload00:00:183
3148399140,12cyclictest10600-21python19:35:323
3148399140,12cyclictest0-21swapper/322:05:123
3148399140,12cyclictest0-21swapper/300:29:173
3148299141,2cyclictest1244-21apt-get19:15:122
31482991411,2cyclictest29841-21kworker/u8:121:50:042
31482991411,2cyclictest21417-21kworker/u8:122:44:042
31482991410,2cyclictest5703-21ssh23:16:262
31482991410,2cyclictest0-21swapper/222:00:002
3148299140,3cyclictest16893-21cpuspeed_turbos22:20:142
3148299140,3cyclictest0-21swapper/222:19:502
3148299140,2cyclictest0-21swapper/221:41:502
3148299140,12cyclictest0-21swapper/221:21:222
3148299140,12cyclictest0-21swapper/200:00:302
3148199149,3cyclictest3427-21sh21:30:281
3148199149,3cyclictest0-21swapper/122:20:141
3148199142,6cyclictest0-21swapper/122:50:001
31481991411,2cyclictest0-21swapper/123:29:561
31481991411,2cyclictest0-21swapper/123:24:461
31481991411,2cyclictest0-21swapper/120:45:261
3148199141,10cyclictest15313-21diskmemload23:00:261
3148199140,2cyclictest0-21swapper/123:36:261
3148199140,2cyclictest0-21swapper/123:36:261
3148199140,2cyclictest0-21swapper/123:15:171
3148199140,2cyclictest0-21swapper/122:42:261
3148199140,13cyclictest0-21swapper/122:06:061
3148199140,13cyclictest0-21swapper/119:20:161
3148099141,2cyclictest6747-21apt-get21:35:150
3148099141,2cyclictest4364-21nscd23:55:410
31480991411,2cyclictest15313-21diskmemload00:38:560
31480991411,2cyclictest0-21swapper/023:54:060
3148099140,13cyclictest0-21swapper/023:03:360
3148099140,13cyclictest0-21swapper/022:04:160
3148099140,13cyclictest0-21swapper/019:10:160
3148099140,12cyclictest19193-21sh22:22:040
3148099140,12cyclictest0-21swapper/023:25:570
3148099140,12cyclictest0-21swapper/022:34:160
3148099140,12cyclictest0-21swapper/021:56:360
237892140,0sleep20-21swapper/223:01:032
3148399138,3cyclictest20629-21ssh21:15:153
3148399137,4cyclictest8084-21grep22:45:133
3148399131,11cyclictest0-21swapper/322:10:283
3148399131,10cyclictest5129-21runrttasks23:31:313
31483991310,2cyclictest15313-21diskmemload21:38:283
31483991310,2cyclictest0-21swapper/323:51:483
31483991310,2cyclictest0-21swapper/322:25:193
31483991310,2cyclictest0-21swapper/321:52:273
31483991310,2cyclictest0-21swapper/321:00:183
3148399130,12cyclictest0-21swapper/323:35:383
3148399130,12cyclictest0-21swapper/323:35:383
3148399130,12cyclictest0-21swapper/323:17:393
3148399130,12cyclictest0-21swapper/322:40:173
3148399130,11cyclictest26665-21ssh21:55:253
3148399130,11cyclictest1156-21ssh21:29:253
31482991310,2cyclictest25584-21kworker/u8:022:00:042
31482991310,2cyclictest23753-21kworker/u8:220:25:042
31482991310,2cyclictest15313-21diskmemload21:15:172
31482991310,2cyclictest15313-21diskmemload00:26:472
31482991310,2cyclictest0-21swapper/222:55:032
31482991310,2cyclictest0-21swapper/222:10:592
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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