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2026-04-25 - 18:57

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, 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, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rack0slot6s.osadl.org (updated Sat Apr 25, 2026 00:45:59)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
11674082262255,4sleep190-21swapper/1919:07:0311
11675692254234,11sleep140-21swapper/1419:09:206
11674652236216,12sleep50-21swapper/519:07:5015
11675222235215,12sleep130-21swapper/1319:08:385
11676042234214,13sleep180-21swapper/1819:09:4310
11674992234214,13sleep150-21swapper/1519:08:207
11674632232213,11sleep30-21swapper/319:07:4713
11673752232212,12sleep80-21swapper/819:06:3218
11673442232214,11sleep10-21swapper/119:06:051
11676132231211,13sleep60-21swapper/619:09:5216
11673382230211,12sleep160-21swapper/1619:06:018
11675172228208,13sleep90-21swapper/919:08:3419
11675262226207,12sleep170-21swapper/1719:08:429
11675642225207,11sleep100-21swapper/1019:09:152
11674152225204,13sleep40-21swapper/419:07:0814
11673102225207,11sleep120-21swapper/1219:05:364
11674002223203,13sleep110-21swapper/1119:06:553
11674672222202,13sleep70-21swapper/719:07:5217
11674622222202,12sleep20-21swapper/219:07:4612
11643772214195,11sleep00-21swapper/019:05:040
116802899715,29cyclictest0-21swapper/1100:16:253
116802299457,34cyclictest0-21swapper/921:01:2719
116804799340,33cyclictest0-21swapper/1721:44:599
116804799340,33cyclictest0-21swapper/1721:44:599
116802299340,0cyclictest0-21swapper/920:29:5919
116805399330,32cyclictest0-21swapper/1919:50:0011
1168041993231,0cyclictest0-21swapper/1520:44:597
1168022993232,0cyclictest0-21swapper/921:19:5919
116799999310,0cyclictest0-21swapper/221:29:5912
1168041993030,0cyclictest0-21swapper/1519:43:597
1168051992929,0cyclictest0-21swapper/1821:14:5910
1168041992929,0cyclictest0-21swapper/1520:10:597
1168031992929,0cyclictest0-21swapper/1200:19:584
1168022992929,0cyclictest0-21swapper/920:33:5819
1167991992929,0cyclictest0-21swapper/020:34:590
1168047992828,0cyclictest0-21swapper/1720:09:599
116804399280,27cyclictest0-21swapper/1621:09:598
1168038992828,0cyclictest0-21swapper/1419:53:596
1168036992828,0cyclictest0-21swapper/1320:23:585
1168013992826,1cyclictest1293129-21systemd21:40:0017
1168013992826,1cyclictest1293129-21systemd21:39:5917
1167994992826,1cyclictest1425539-21updatedb00:19:581
116799199280,28cyclictest0-21swapper/019:42:590
1168031992726,1cyclictest1272467-21systemd21:14:594
1168013992727,0cyclictest0-21swapper/721:44:5917
1168013992727,0cyclictest0-21swapper/721:44:5917
1168013992727,0cyclictest0-21swapper/720:40:5917
1168013992727,0cyclictest0-21swapper/720:37:5917
1168008992727,0cyclictest0-21swapper/620:59:5916
116800199270,16cyclictest0-21swapper/300:19:5913
1167991992727,0cyclictest0-21swapper/021:34:590
1168053992626,0cyclictest0-21swapper/1920:34:5911
1168051992626,0cyclictest0-21swapper/1821:08:5910
1168043992626,0cyclictest0-21swapper/1619:27:598
116803199260,25cyclictest1201880-21chrt19:49:004
1168028992626,0cyclictest0-21swapper/1119:53:593
1168026992626,0cyclictest0-21swapper/1020:40:592
116802299260,0cyclictest0-21swapper/921:08:0019
116801399260,15cyclictest0-21swapper/723:35:5817
1168053992525,0cyclictest0-21swapper/1919:42:5911
1168051992525,0cyclictest0-21swapper/1820:25:0010
1168041992525,0cyclictest0-21swapper/1521:00:587
1168031992524,1cyclictest0-21swapper/1220:29:594
1168026992525,0cyclictest0-21swapper/1021:45:002
1168026992525,0cyclictest0-21swapper/1021:45:002
1168026992525,0cyclictest0-21swapper/1020:37:592
1168022992525,0cyclictest0-21swapper/920:40:5919
1168053992424,0cyclictest0-21swapper/1921:08:5911
116805399240,23cyclictest1251891-21sed20:50:0011
1168047992424,0cyclictest0-21swapper/1721:07:599
1168031992422,1cyclictest0-21swapper/1220:44:594
1168028992424,0cyclictest0-21swapper/1121:07:483
1168026992424,0cyclictest0-21swapper/1021:39:592
1168026992424,0cyclictest0-21swapper/1021:39:592
1168022992424,0cyclictest0-21swapper/920:37:5819
116801999240,23cyclictest1280855-21latency_hist21:24:5918
1168004992424,0cyclictest0-21swapper/400:19:5914
1168053992323,0cyclictest0-21swapper/1921:34:5911
1168041992323,0cyclictest0-21swapper/1519:51:597
116804199230,22cyclictest1158996-21kworker/15:2+i915-unordered19:30:597
1168038992322,1cyclictest0-21swapper/1421:24:596
1168022992323,0cyclictest0-21swapper/921:39:5919
1168022992323,0cyclictest0-21swapper/921:39:5919
1168019992323,0cyclictest0-21swapper/819:55:0018
1168019992319,3cyclictest1231717-21latency_hist20:25:0018
1168019992319,3cyclictest1206381-21sed19:55:0018
1168013992323,0cyclictest0-21swapper/721:10:0017
1168013992312,11cyclictest0-21swapper/722:32:5917
116800699230,1cyclictest1288991-21true21:34:5915
1167994992323,0cyclictest0-21swapper/121:14:591
116805399220,21cyclictest0-21swapper/1920:20:1611
116805399220,21cyclictest0-21swapper/1919:10:1711
116804799220,20cyclictest0-21swapper/1700:10:169
1168043992222,0cyclictest0-21swapper/1620:29:598
116804399220,0cyclictest0-21swapper/1620:55:008
116803899220,21cyclictest1380399-21date23:24:596
116803899220,1cyclictest0-21swapper/1420:24:596
116803699220,21cyclictest1206373-21latency_hist19:54:595
1168031992222,0cyclictest0-21swapper/1219:56:594
116803199220,22cyclictest0-21swapper/1220:04:594
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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