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2025-12-14 - 14:27

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 20 highest latencies:
System rack2slot7s.osadl.org (updated Sun Dec 14, 2025 07:55:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3687451996648,14cyclictest3908342-21grep05:39:390
3687453996339,5cyclictest3919043-21od05:40:262
3687453995831,19cyclictest1167-21mta-sts-daemon05:29:422
3687452995544,8cyclictest3910022-21multi.sh05:39:461
3687453995343,6cyclictest270800-21multi.sh06:08:592
3687452995346,3cyclictest3678270-21kworker/u8:14-xprtiod06:09:421
3687453995245,3cyclictest0-21swapper/205:49:392
3687453995244,5cyclictest358654-21sh06:12:292
3687452995232,3cyclictest171rcu_preempt06:10:081
3687451995044,4cyclictest329164-21sh06:11:190
3687451994841,5cyclictest3971942-21sh05:42:390
3687451994838,8cyclictest290297-21wc06:09:440
3687452994739,4cyclictest3948433-21sh05:41:391
3687453994637,6cyclictest369-21systemd-journal06:25:012
3687451994636,7cyclictest3995873-21execl05:49:400
3687452994533,9cyclictest378947-21sh06:40:011
3687452994335,5cyclictest3995872-21execl05:49:501
3687452994133,5cyclictest3690435-21systemd-run05:15:011
368745399405,27cyclictest3910105-21tee05:39:462
3687452994030,7cyclictest4006055-21spawn06:02:501
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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