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2026-05-13 - 08:31

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #8, slot #4

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, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rack8slot4s.osadl.org (updated Wed May 13, 2026 00:44:41)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
24834562253174,67sleep60-21swapper/619:05:356
24836152244175,22sleep30-21swapper/319:07:503
24834612244180,19sleep20-21swapper/219:05:392
24835072243176,20sleep10-21swapper/119:06:191
24835022230193,24sleep50-21swapper/519:06:145
24837112225192,22sleep70-21swapper/719:09:157
24812452223161,52sleep40-21swapper/419:05:094
24835442219181,25sleep00-21swapper/019:06:500
2483993996010,37cyclictest2521831-21awk20:10:215
248398699270,26cyclictest2620311-21cat23:00:003
248397799270,4cyclictest2543597-21munin-plugin-st20:50:000
2483999992622,3cyclictest2584824-21cron21:59:597
248399799260,25cyclictest2658742-21awk00:05:016
248399799250,24cyclictest0-21swapper/623:09:596
248399399250,25cyclictest0-21swapper/521:30:135
248398699250,24cyclictest2667615-21sendmail00:20:013
248398399253,1cyclictest0-21swapper/220:20:012
248397799250,4cyclictest2599595-21grep22:25:000
248397799250,24cyclictest2583616-21awk21:55:170
248399999240,23cyclictest2510014-21ntpq19:50:197
248399399242,4cyclictest0-21swapper/522:33:085
248399399242,4cyclictest0-21swapper/522:33:085
248399399242,4cyclictest0-21swapper/521:05:165
248399399242,4cyclictest0-21swapper/520:32:195
248399399242,4cyclictest0-21swapper/500:11:595
2483993992421,3cyclictest0-21swapper/519:55:125
2483993992421,2cyclictest2564671-21apt-get21:25:135
2483993992420,3cyclictest2486963-21latency_hist19:15:005
248399399240,24cyclictest2638052-21basename23:30:015
248399399240,23cyclictest2581925-21perf-exec21:55:005
248399399240,21cyclictest2597079-21apt-get22:20:125
248399399240,1cyclictest0-21swapper/522:35:125
248398699240,23cyclictest0-21swapper/322:50:123
248398699240,23cyclictest0-21swapper/322:45:193
2483983992423,1cyclictest2623729-21apt-get23:05:112
248398399240,23cyclictest2511577-21apt-get19:55:112
248397999240,23cyclictest0-21swapper/122:20:121
248397999240,23cyclictest0-21swapper/120:20:011
248397999240,23cyclictest0-21swapper/120:15:001
2483999992323,0cyclictest0-21swapper/722:35:187
2483999992323,0cyclictest0-21swapper/719:45:117
2483999992322,1cyclictest2670958-21apt-get00:25:147
248399999230,22cyclictest2549937-21apt-get21:00:137
248399999230,22cyclictest2517479-21apt-get20:05:127
248399999230,22cyclictest0-21swapper/723:35:127
248399999230,22cyclictest0-21swapper/723:10:147
248399999230,22cyclictest0-21swapper/720:15:137
248399999230,0cyclictest0-21swapper/723:50:197
2483997992322,1cyclictest2600020-21apt-get22:25:126
2483997992322,1cyclictest2600020-21apt-get22:25:126
2483997992320,2cyclictest2596644-21ls22:20:006
248399799230,22cyclictest2614852-21apt-get22:50:126
248399799230,22cyclictest2578966-21ls21:50:006
248399799230,22cyclictest2561727-21apt-get21:20:106
248399799230,22cyclictest0-21swapper/623:00:216
248399799230,22cyclictest0-21swapper/620:45:126
248399799230,22cyclictest0-21swapper/619:25:136
248399799230,0cyclictest0-21swapper/622:40:136
2483993992322,1cyclictest2548267-21ntpq20:55:185
2483993992321,1cyclictest25440302chrt20:50:125
2483993992318,4cyclictest0-21swapper/522:45:135
248399399231,4cyclictest0-21swapper/523:50:005
248399399231,4cyclictest0-21swapper/521:38:125
248399399231,4cyclictest0-21swapper/520:21:205
248399399231,4cyclictest0-21swapper/519:37:245
248399399231,4cyclictest0-21swapper/500:33:565
248399399231,4cyclictest0-21swapper/500:22:585
248399399230,2cyclictest2672256-21ntpq00:25:185
248399399230,23cyclictest2563058-21ntpq21:20:165
248399399230,23cyclictest0-21swapper/523:55:125
248399399230,20cyclictest0-21swapper/523:30:185
248398999230,23cyclictest2489349-21cat19:15:184
248398999230,22cyclictest0-21swapper/419:45:104
248398999230,22cyclictest0-21swapper/419:40:104
248398999230,1cyclictest2666351-21ntpq00:15:194
248398999230,1cyclictest2536554-21ntpq20:35:184
2483986992323,0cyclictest0-21swapper/321:45:123
2483986992323,0cyclictest0-21swapper/320:15:133
248398699230,23cyclictest0-21swapper/322:40:003
248398699230,22cyclictest0-21swapper/322:25:123
248398699230,22cyclictest0-21swapper/322:25:123
248398399230,22cyclictest2605919-21appstreamcli22:35:032
248398399230,22cyclictest0-21swapper/222:40:192
248398399230,22cyclictest0-21swapper/200:05:112
248398399230,0cyclictest0-21swapper/221:05:112
2483979992323,0cyclictest0-21swapper/100:20:131
2483979992322,1cyclictest0-21swapper/122:30:011
2483979992322,1cyclictest0-21swapper/122:30:001
2483979992319,3cyclictest2531839-21awk20:30:001
248397999230,22cyclictest0-21swapper/123:45:121
248397999230,22cyclictest0-21swapper/123:25:011
248397999230,22cyclictest0-21swapper/123:00:131
248397999230,22cyclictest0-21swapper/122:55:121
248397999230,22cyclictest0-21swapper/122:40:141
248397999230,22cyclictest0-21swapper/122:15:121
248397999230,1cyclictest0-21swapper/121:59:591
2483977992322,1cyclictest0-21swapper/020:55:120
2483977992322,1cyclictest0-21swapper/020:35:110
248397799230,23cyclictest0-21swapper/022:40:130
248397799230,23cyclictest0-21swapper/000:24:590
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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