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2025-09-18 - 05:02

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #2, slot #7

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.

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 rack2slot7s.osadl.org (updated Thu Sep 18, 2025 00:40:26)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
4065047996337,23cyclictest0-21swapper/000:00:010
4065048996246,12cyclictest19293-21timerandwakeup23:43:471
4065049995342,7cyclictest422-21dbus-daemon23:03:282
406504799522,24cyclictest4145740-21ssh22:13:350
406504799522,24cyclictest4145740-21ssh22:13:350
4065047995214,17cyclictest3932-21ssh23:23:390
4065047995214,17cyclictest3932-21ssh23:23:390
4065048995140,5cyclictest0-21swapper/100:23:361
4065048995140,5cyclictest0-21swapper/100:23:361
406504799502,41cyclictest4142059-21ssh22:08:380
406504799502,41cyclictest4142059-21ssh22:08:380
4065048994939,6cyclictest56068-21systemd-run00:40:011
4065047994924,22cyclictest46188-21sendmail_mailqu00:23:430
4065047994924,22cyclictest46188-21sendmail_mailqu00:23:430
4065049994840,5cyclictest4154507-21latency_hist22:25:022
4065048994839,5cyclictest0-21swapper/122:33:251
4065048994838,6cyclictest422-21dbus-daemon23:55:011
4065047994825,20cyclictest4102261-21latency21:13:290
406504799482,35cyclictest39729-21ssh00:13:460
4065047994738,4cyclictest0-21swapper/022:23:400
4065049994638,5cyclictest4069571-21systemd-run19:25:012
4065048994633,7cyclictest39602-21ssh00:13:411
406504799469,11cyclictest151ktimers/020:48:350
406504799463,23cyclictest4183062-21ssh23:03:380
406504799462,17cyclictest52249-21ssh00:33:420
4065047994620,3cyclictest0-21swapper/022:28:260
4065049994521,18cyclictest422-21dbus-daemon00:33:382
4065047994537,5cyclictest4111092-21cron21:25:010
4065047994537,5cyclictest4111092-21cron21:25:010
4065047994524,4cyclictest1457-21ssh23:20:020
4065047994519,4cyclictest4176846-21latency_hist22:55:020
4065047994434,5cyclictest0-21swapper/021:55:010
4065047994421,4cyclictest4171142-21aten_r2power_fr22:48:240
4065047994419,4cyclictest4122044-21grep21:40:010
4065047994418,7cyclictest266-21systemd-journal22:15:030
4065049994335,5cyclictest422-21dbus-daemon22:50:022
4065049994335,5cyclictest4111098-21sh21:25:012
4065049994335,5cyclictest4111098-21sh21:25:012
4065049994335,4cyclictest956-21mta-sts-daemon23:48:332
4065049994334,6cyclictest39190-21grep00:13:332
4065048994334,5cyclictest4154456-21ssh22:25:011
4065048994330,4cyclictest171rcu_preempt19:43:341
4065047994322,4cyclictest2329964-21cupsd21:28:340
4065047994322,4cyclictest2329964-21cupsd21:28:340
406504799432,17cyclictest33815-21ssh00:03:380
4065049994228,8cyclictest4102470-21sh21:13:342
406504999422,33cyclictest4090012-21sshd20:33:382
4065047994234,4cyclictest0-21swapper/023:53:380
406504799422,20cyclictest4124522-21ssh21:43:360
4065049994134,3cyclictest0-21swapper/223:33:432
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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