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2025-11-17 - 18:47

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, slot #3

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 50 highest latencies:
System rack0slot3s.osadl.org (updated Mon Nov 17, 2025 00:44:42)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
30384062271221,16sleep40-21swapper/419:08:264
30384602266241,16sleep70-21swapper/719:09:087
30361952263214,17sleep20-21swapper/219:05:012
30382992262214,17sleep30-21swapper/319:06:563
30383942259236,15sleep10-21swapper/119:08:141
30384022246218,18sleep00-21swapper/019:08:210
30384502244220,16sleep60-21swapper/619:09:006
30382662244219,17sleep50-21swapper/519:06:345
3038834993634,1cyclictest0-21swapper/119:30:181
303883899350,1cyclictest0-21swapper/220:25:182
3038842993230,2cyclictest0-21swapper/319:30:163
303884299300,28cyclictest3086533-21cstates20:35:143
3038842992923,5cyclictest1372-21arpwatch21:40:433
3038842992922,5cyclictest3100723-21hddtemp_smartct21:00:163
303884299290,25cyclictest0-21swapper/319:55:363
3038855992824,3cyclictest3081756-21awk20:25:186
3038855992821,3cyclictest0-21swapper/622:30:096
3038842992824,3cyclictest1372-21arpwatch22:57:343
3038842992824,2cyclictest3130354-21cstates21:55:163
3038842992824,2cyclictest0-21swapper/322:35:123
3038842992823,3cyclictest1372-21arpwatch20:54:323
3038842992822,4cyclictest3039641-21df_inode19:10:173
3038842992821,5cyclictest3079365-21ntpq20:20:203
303884299280,24cyclictest2955990-21kworker/3:2+mm_percpu_wq19:25:273
303885999270,25cyclictest0-21swapper/719:16:147
303885599270,22cyclictest0-21swapper/619:25:596
3038842992724,2cyclictest1372-21arpwatch19:16:253
3038842992723,3cyclictest3169193-21cat23:05:203
3038842992723,3cyclictest1372-21arpwatch21:05:543
3038842992723,3cyclictest1372-21arpwatch21:05:543
3038842992723,2cyclictest1372-21arpwatch19:24:573
3038842992723,2cyclictest0-21swapper/323:39:483
3038842992723,2cyclictest0-21swapper/323:39:473
303884299270,25cyclictest2955990-21kworker/3:2+mm_percpu_wq23:15:203
3038859992618,6cyclictest3067731-21df_inode20:00:167
303885999260,22cyclictest0-21swapper/722:41:347
303885999260,22cyclictest0-21swapper/720:40:057
3038842992622,4cyclictest0-21swapper/300:30:303
3038842992622,3cyclictest1372-21arpwatch22:05:383
3038842992622,2cyclictest1372-21arpwatch22:51:513
3038842992622,2cyclictest0-21swapper/320:59:543
3038842992620,5cyclictest1372-21arpwatch22:18:253
3038842992619,4cyclictest2955990-21kworker/3:2-mm_percpu_wq00:12:133
3038842992618,4cyclictest2955990-21kworker/3:2+mm_percpu_wq20:45:223
303884299261,24cyclictest527-21systemd-journal19:47:433
303884299260,2cyclictest3105363-21taskset21:10:013
303884299260,24cyclictest527-21systemd-journal23:01:063
303884299260,24cyclictest0-21swapper/323:48:143
303884299260,24cyclictest0-21swapper/320:28:573
303884299260,24cyclictest0-21swapper/320:11:263
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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