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2026-04-09 - 15:21

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, 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 rack0slot4s.osadl.org (updated Thu Apr 09, 2026 00:46:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
41435422419398,14sleep100-21swapper/1019:09:242
41432942373368,3sleep140-21swapper/1419:06:146
41435202364342,14sleep80-21swapper/819:09:0614
41434532360319,14sleep30-21swapper/319:08:139
41401132360352,5sleep130-21swapper/1319:05:095
41433852359336,13sleep150-21swapper/1519:07:207
41434512358322,29sleep10-21swapper/119:08:111
41435012357318,12sleep70-21swapper/719:08:4813
41434562357337,13sleep60-21swapper/619:08:1512
41432652357319,13sleep50-21swapper/519:05:5011
41434502351331,13sleep00-21swapper/019:08:090
41432892351332,12sleep90-21swapper/919:06:1015
41432522349329,13sleep110-21swapper/1119:05:403
41435782347328,13sleep20-21swapper/219:09:488
41434092345324,13sleep120-21swapper/1219:07:344
41432832344323,14sleep40-21swapper/419:06:0510
41924672550,0sleep100-21swapper/1020:05:122
4144039994140,1cyclictest0-21swapper/422:59:0510
4144039993838,0cyclictest0-21swapper/400:11:3510
4144039993636,0cyclictest0-21swapper/400:17:5110
4144054993534,1cyclictest4155855-21kworker/u32:0+flush-259:021:40:222
4144039993434,0cyclictest0-21swapper/421:27:4110
414406499330,30cyclictest0-21swapper/1323:50:535
4144039993333,0cyclictest0-21swapper/419:31:5010
414406199320,29cyclictest0-21swapper/1219:45:134
4144054993231,1cyclictest95110-21kworker/u32:2+events_unbound21:50:182
4144039993232,0cyclictest0-21swapper/423:19:2510
4144039993232,0cyclictest0-21swapper/422:52:0710
4144039993232,0cyclictest0-21swapper/422:45:0310
4144039993232,0cyclictest0-21swapper/420:31:3210
4144039993232,0cyclictest0-21swapper/419:49:5210
4144039993232,0cyclictest0-21swapper/400:05:4110
414403999320,32cyclictest0-21swapper/420:35:1410
4144027993229,3cyclictest1774-21snmpd21:56:550
4144027993229,3cyclictest1774-21snmpd21:56:540
414407099310,30cyclictest0-21swapper/1522:14:477
414406699310,30cyclictest0-21swapper/1422:37:066
414406699310,30cyclictest0-21swapper/1421:36:576
4144064993128,3cyclictest1774-21snmpd00:31:005
4144061993130,1cyclictest0-21swapper/1220:03:594
414406199310,30cyclictest0-21swapper/1221:48:044
414406199310,30cyclictest0-21swapper/1219:43:054
414406199310,30cyclictest0-21swapper/1219:20:144
414405999310,30cyclictest0-21swapper/1123:45:153
414405999310,30cyclictest0-21swapper/1122:10:353
4144054993130,1cyclictest63618-21kworker/10:0+events23:03:132
4144054993130,1cyclictest63618-21kworker/10:0+events22:55:552
4144054993130,1cyclictest63618-21kworker/10:0+events22:27:572
4144054993130,1cyclictest4176796-21kworker/10:1+events21:18:532
4144054993130,1cyclictest208148-21kworker/10:1+events23:15:332
4144054993130,1cyclictest208148-21kworker/10:1+events00:05:472
4144054993130,1cyclictest208148-21kworker/10:1+events00:00:362
4144054993129,1cyclictest4176796-21kworker/10:1+events19:55:122
414405399310,30cyclictest0-21swapper/923:25:0715
414405399310,30cyclictest0-21swapper/922:23:3715
414405399310,30cyclictest0-21swapper/922:04:0515
414405399310,30cyclictest0-21swapper/922:04:0415
414405399310,30cyclictest0-21swapper/920:56:1115
414405399310,30cyclictest0-21swapper/919:26:5515
4144050993130,1cyclictest1774-21snmpd00:15:2014
414404899310,30cyclictest0-21swapper/722:55:2213
414404899310,30cyclictest0-21swapper/721:48:3613
4144044993130,1cyclictest1774-21snmpd21:36:5812
4144042993130,1cyclictest138644-21mii-tool22:15:1311
4144039993130,1cyclictest1774-21snmpd19:52:0210
4144039993130,1cyclictest115039-21kworker/4:2+events_power_efficient22:07:5310
414403299310,30cyclictest0-21swapper/220:19:488
4144027993129,1cyclictest1774-21snmpd20:23:210
4144070993029,1cyclictest0-21swapper/1522:02:567
4144070993029,1cyclictest0-21swapper/1522:02:567
414407099300,29cyclictest0-21swapper/1520:30:037
414407099300,1cyclictest0-21swapper/1500:21:277
4144066993029,1cyclictest1774-21snmpd23:19:016
4144066993029,1cyclictest1774-21snmpd21:14:236
4144064993029,1cyclictest4163916-21ethtool19:30:145
4144064993029,1cyclictest242602-21nodev-device-ev23:35:165
4144064993029,1cyclictest1774-21snmpd21:40:005
414406499300,1cyclictest0-21swapper/1322:57:575
4144061993029,1cyclictest1774-21snmpd23:05:094
4144061993029,1cyclictest1774-21snmpd22:11:444
4144061993029,1cyclictest0-21swapper/1222:20:384
414406199300,1cyclictest0-21swapper/1222:05:054
4144059993029,1cyclictest1774-21snmpd23:53:473
414405999300,1cyclictest0-21swapper/1122:58:003
414405999300,1cyclictest0-21swapper/1120:04:563
4144054993030,0cyclictest63618-21kworker/10:0+events22:47:252
4144054993030,0cyclictest63618-21kworker/10:0+events22:41:082
4144054993030,0cyclictest63618-21kworker/10:0+events22:36:072
4144054993030,0cyclictest63618-21kworker/10:0+events22:30:362
4144054993030,0cyclictest63618-21kworker/10:0+events21:56:332
4144054993030,0cyclictest63618-21kworker/10:0+events21:56:332
4144054993030,0cyclictest4176796-21kworker/10:1+events19:45:442
4144054993030,0cyclictest297154-21kworker/10:1+events00:31:142
4144054993030,0cyclictest290174-21kworker/10:2+events00:15:252
4144054993030,0cyclictest208148-21kworker/10:1+events23:53:372
4144054993030,0cyclictest208148-21kworker/10:1+events23:47:362
4144054993030,0cyclictest208148-21kworker/10:1+events23:27:232
4144054993030,0cyclictest208148-21kworker/10:1+events00:10:372
4144054993029,1cyclictest72639-21kworker/10:2+events21:30:372
4144054993029,1cyclictest72639-21kworker/10:2+events21:28:492
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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