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2025-07-06 - 00:22

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, slot #0

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 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.

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 50 highest latencies:
System r0s0s.osadl.org (updated Sat Jul 05, 2025 12:46:27)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
19399972305286,11sleep10-21swapper/107:05:241
19410062298284,9sleep70-21swapper/707:06:267
19411712294258,28sleep00-21swapper/007:08:430
19410032292257,27sleep40-21swapper/407:06:234
19410902291273,11sleep30-21swapper/307:07:353
19411192286267,12sleep50-21swapper/507:08:015
19410932285266,12sleep60-21swapper/607:07:386
19411452284265,12sleep20-21swapper/207:08:222
194174599120118,2cyclictest107-21kswapd007:25:026
1941743994844,3cyclictest671864-21systemd-journal09:25:044
1941745993836,2cyclictest1941352-21kworker/u16:3+events_unbound07:24:596
1941746993629,6cyclictest2016925-21cat09:45:167
1941746993530,4cyclictest833-21snmpd08:52:107
1941746993330,2cyclictest833-21snmpd11:01:257
1941746993330,2cyclictest1978410-21cat08:25:177
194174699330,30cyclictest0-21swapper/710:22:127
1941744993330,2cyclictest833-21snmpd11:13:415
1941744993330,2cyclictest833-21snmpd10:08:515
1941744993330,2cyclictest833-21snmpd07:31:285
1941744993329,3cyclictest833-21snmpd11:52:535
1941744993329,3cyclictest833-21snmpd11:08:325
1941743993330,2cyclictest833-21snmpd11:37:554
194174399330,30cyclictest0-21swapper/411:06:084
1941742993330,3cyclictest2093038-21cat12:25:153
194174199330,32cyclictest0-21swapper/210:58:492
1941740993330,2cyclictest2021636-21cat09:55:161
1941739993330,2cyclictest2040809-21cat10:35:170
1941746993230,1cyclictest833-21snmpd08:55:257
1941746993229,2cyclictest833-21snmpd12:15:377
1941746993229,2cyclictest833-21snmpd07:42:357
1941746993229,2cyclictest1983352-21cat08:35:177
194174699320,31cyclictest0-21swapper/711:16:417
194174699320,31cyclictest0-21swapper/710:58:427
194174699320,30cyclictest0-21swapper/707:29:317
1941745993230,2cyclictest833-21snmpd08:58:046
1941745993228,3cyclictest833-21snmpd08:13:476
194174599320,31cyclictest0-21swapper/612:34:186
1941744993230,1cyclictest833-21snmpd10:17:565
1941744993230,1cyclictest833-21snmpd07:28:015
1941744993229,2cyclictest833-21snmpd12:09:575
194174499320,31cyclictest0-21swapper/512:25:155
194174499320,31cyclictest0-21swapper/508:15:165
1941743993230,2cyclictest833-21snmpd08:39:334
1941743993230,1cyclictest833-21snmpd10:44:574
1941743993230,1cyclictest833-21snmpd08:33:484
1941743993229,2cyclictest833-21snmpd10:53:194
1941743993229,2cyclictest833-21snmpd10:31:284
1941743993229,2cyclictest833-21snmpd08:56:044
1941743993229,2cyclictest2073914-21cat11:45:184
194174399320,30cyclictest0-21swapper/411:20:224
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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