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2026-06-20 - 13:03

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 Sat Jun 20, 2026 00:46:19)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
28505782403382,14sleep10-21swapper/119:09:051
28505782403382,14sleep10-21swapper/119:09:041
28471682369362,5sleep70-21swapper/719:05:0913
28471682369362,5sleep70-21swapper/719:05:0813
28505042367347,12sleep50-21swapper/519:08:2111
28505042367347,12sleep50-21swapper/519:08:2011
28504152363356,5sleep40-21swapper/419:07:1510
28504152363356,5sleep40-21swapper/419:07:1410
28505902360340,13sleep90-21swapper/919:09:1315
28505902360340,13sleep90-21swapper/919:09:1215
28503042352331,14sleep80-21swapper/819:05:4314
28503042352331,14sleep80-21swapper/819:05:4214
28504462351312,13sleep100-21swapper/1019:07:372
28504462351312,13sleep100-21swapper/1019:07:362
28503212348328,13sleep60-21swapper/619:05:5712
28503212348328,13sleep60-21swapper/619:05:5612
28506042347327,13sleep140-21swapper/1419:09:176
28506042347327,13sleep140-21swapper/1419:09:176
28503532347327,13sleep130-21swapper/1319:06:205
28503532347327,13sleep130-21swapper/1319:06:195
28505382345325,13sleep110-21swapper/1119:08:433
28505382345325,13sleep110-21swapper/1119:08:423
28503372344323,14sleep30-21swapper/319:06:109
28503372344323,14sleep30-21swapper/319:06:099
28503322344324,13sleep150-21swapper/1519:06:067
28503322344324,13sleep150-21swapper/1519:06:057
28504922339318,14sleep00-21swapper/019:08:150
28504922339318,14sleep00-21swapper/019:08:150
28503292338317,14sleep120-21swapper/1219:06:034
28503292338317,14sleep120-21swapper/1219:06:024
28505792336316,13sleep20-21swapper/219:09:068
28505792336316,13sleep20-21swapper/219:09:058
285110499450,20cyclictest3001118-21ssh21:45:276
285106799373,30cyclictest3130297-21kworker/u32:2+flush-259:000:16:578
2851067993732,3cyclictest3021600-21kworker/u32:2+events_unbound22:24:088
2851067993732,3cyclictest3021600-21kworker/u32:2+events_unbound22:24:088
2851104993613,9cyclictest0-21swapper/1400:30:126
2851086993635,1cyclictest3039703-21kworker/u32:1+flush-259:022:55:1714
2851108993430,1cyclictest1774-21snmpd20:43:567
2851074993434,0cyclictest0-21swapper/423:36:4410
2851074993333,0cyclictest0-21swapper/423:32:2210
285110499320,29cyclictest0-21swapper/1421:20:146
2851083993231,1cyclictest2921384-21kworker/u32:2+flush-259:021:25:1613
2851067993228,2cyclictest1769-21arpwatch23:50:238
285106799320,30cyclictest2982249-21ssh21:31:128
285106799320,29cyclictest0-21swapper/223:46:548
285106799320,29cyclictest0-21swapper/223:44:058
285106799320,29cyclictest0-21swapper/223:35:348
285106799320,29cyclictest0-21swapper/223:30:418
285106799320,29cyclictest0-21swapper/223:29:158
285106799320,29cyclictest0-21swapper/223:19:208
285106799320,29cyclictest0-21swapper/223:11:258
285106799320,29cyclictest0-21swapper/223:01:218
285106799320,29cyclictest0-21swapper/222:57:488
285106799320,29cyclictest0-21swapper/222:40:228
285106799320,29cyclictest0-21swapper/222:30:448
285106799320,29cyclictest0-21swapper/222:15:188
285106799320,29cyclictest0-21swapper/222:15:178
285106799320,29cyclictest0-21swapper/222:09:488
285106799320,29cyclictest0-21swapper/221:50:488
285106799320,29cyclictest0-21swapper/221:47:238
285106799320,29cyclictest0-21swapper/221:41:308
285106799320,29cyclictest0-21swapper/221:26:418
285106799320,29cyclictest0-21swapper/221:05:388
285106799320,29cyclictest0-21swapper/220:56:568
285106799320,29cyclictest0-21swapper/220:45:228
285106799320,29cyclictest0-21swapper/220:42:418
285106799320,29cyclictest0-21swapper/220:36:228
285106799320,29cyclictest0-21swapper/220:32:018
285106799320,29cyclictest0-21swapper/220:25:048
285106799320,29cyclictest0-21swapper/220:23:218
285106799320,29cyclictest0-21swapper/220:17:298
285106799320,29cyclictest0-21swapper/220:10:118
285106799320,29cyclictest0-21swapper/220:05:038
285106799320,29cyclictest0-21swapper/220:02:088
285106799320,29cyclictest0-21swapper/219:55:598
285106799320,29cyclictest0-21swapper/219:51:008
285106799320,29cyclictest0-21swapper/219:47:278
285106799320,29cyclictest0-21swapper/219:36:118
285106799320,29cyclictest0-21swapper/219:25:238
285106799320,29cyclictest0-21swapper/219:15:408
285106799320,29cyclictest0-21swapper/219:15:398
285106799320,29cyclictest0-21swapper/219:11:008
285106799320,29cyclictest0-21swapper/219:10:598
285106799320,29cyclictest0-21swapper/200:38:458
285106799320,29cyclictest0-21swapper/200:33:188
285106799320,29cyclictest0-21swapper/200:26:038
285106799320,29cyclictest0-21swapper/200:11:258
285106799320,29cyclictest0-21swapper/200:04:558
285110499317,24cyclictest0-21swapper/1420:28:346
285110499317,11cyclictest0-21swapper/1423:57:156
2851098993130,1cyclictest0-21swapper/1220:33:204
285109599310,30cyclictest0-21swapper/1123:34:283
2851093993130,1cyclictest2862852-21kworker/10:1+events22:08:162
2851093993130,1cyclictest1774-21snmpd23:37:482
285109399310,30cyclictest0-21swapper/1020:50:002
285108899310,30cyclictest0-21swapper/919:47:4515
285108899310,30cyclictest0-21swapper/900:01:2815
2851086993130,1cyclictest1774-21snmpd00:09:4914
2851086993129,2cyclictest1774-21snmpd20:06:2014
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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