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2025-11-14 - 15:42

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 Fri Nov 14, 2025 12:46:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
34564712300274,19sleep00-21swapper/007:08:380
34555782300284,11sleep40-21swapper/407:05:284
34565742297283,9sleep60-21swapper/607:09:566
34565542296277,12sleep70-21swapper/707:09:417
34563072295283,8sleep10-21swapper/107:06:221
34563522289270,12sleep50-21swapper/507:06:585
34563182285266,12sleep20-21swapper/207:06:312
34563192283261,14sleep30-21swapper/307:06:323
3457057993534,1cyclictest3588834-21kworker/u16:1+flush-8:012:10:005
345705699340,31cyclictest0-21swapper/410:03:474
3457053993428,5cyclictest833-21snmpd11:57:351
3457058993330,2cyclictest3522455-21cat09:25:156
3457057993331,1cyclictest3539401-21sed10:00:235
3457056993330,2cyclictest833-21snmpd09:23:094
345705699330,30cyclictest0-21swapper/409:52:194
345705699330,30cyclictest0-21swapper/407:48:244
3457055993330,2cyclictest3541517-21cat10:05:133
3457055993329,3cyclictest833-21snmpd12:21:393
3457054993330,2cyclictest833-21snmpd07:50:242
3457053993330,2cyclictest833-21snmpd10:40:321
3457053993330,2cyclictest833-21snmpd09:16:021
3457053993330,2cyclictest3565927-21cat10:55:191
345705399330,32cyclictest0-21swapper/111:20:041
345705399330,30cyclictest0-21swapper/107:28:041
345705399330,1cyclictest0-21swapper/109:28:241
3457052993330,2cyclictest833-21snmpd08:24:100
345705299330,30cyclictest0-21swapper/009:36:120
3457059993230,2cyclictest833-21snmpd10:43:477
3457059993229,2cyclictest833-21snmpd10:54:517
345705999320,30cyclictest0-21swapper/710:11:227
3457058993230,2cyclictest833-21snmpd09:55:016
3457058993230,1cyclictest833-21snmpd08:28:376
3457058993229,2cyclictest833-21snmpd09:59:496
3457058993229,2cyclictest833-21snmpd09:07:416
3457058993229,2cyclictest833-21snmpd07:15:116
345705899320,31cyclictest0-21swapper/610:57:396
345705899320,29cyclictest0-21swapper/610:10:496
3457057993231,1cyclictest833-21snmpd10:30:085
3457057993231,1cyclictest833-21snmpd10:30:085
3457057993230,2cyclictest3587468-21cat11:40:155
3457057993230,2cyclictest3517718-21cat09:15:155
3457057993230,2cyclictest1710061-21ntpd09:49:565
3457057993230,2cyclictest1710061-21ntpd09:44:565
3457057993230,1cyclictest3560998-21df_inode10:45:135
3457056993230,1cyclictest833-21snmpd11:08:184
3457056993229,2cyclictest833-21snmpd12:34:224
3457056993229,2cyclictest833-21snmpd11:31:224
3457056993229,2cyclictest833-21snmpd11:26:344
3457056993229,2cyclictest3541549-21cat10:05:134
345705699320,31cyclictest0-21swapper/411:59:474
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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