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2026-03-30 - 08:11

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #b, slot #5

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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  Phytec
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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 100 highest latencies:
System rackbslot5s.osadl.org (updated Mon Mar 30, 2026 00:44:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2589907995238,11cyclictest231ktimers/119:10:121
2589899994634,7cyclictest2633497-21grep21:15:010
2589913994535,4cyclictest0-21swapper/200:04:592
2589919994329,11cyclictest391ktimers/320:05:113
2589907994228,10cyclictest231ktimers/120:50:111
2589913994132,6cyclictest2631365-21unixbench_singl21:05:272
2589913994131,6cyclictest0-21swapper/223:35:002
2589913994130,9cyclictest2664281-21kworker/u8:0+events_unbound22:55:102
2589913994130,9cyclictest2664281-21kworker/u8:0+events_unbound22:55:092
2589913994129,7cyclictest0-21swapper/223:40:262
2589907994028,8cyclictest2597019-21grep19:25:261
2589907993929,6cyclictest0-21swapper/123:40:001
258989999397,24cyclictest11-21ksoftirqd/021:10:000
2589899993927,7cyclictest0-21swapper/021:20:010
2589919993827,7cyclictest2676555-21sendmail23:20:003
2589913993829,6cyclictest311ktimers/200:25:122
2589907993829,5cyclictest0-21swapper/100:05:161
2589907993826,8cyclictest2674830-21sh23:15:001
2589899993831,4cyclictest2597066-21head19:25:270
2589899993828,6cyclictest0-21swapper/020:40:000
2589899993819,9cyclictest2597525-1kworker/0:1H+mmc_complete21:45:010
2589907993728,4cyclictest0-21swapper/122:20:011
2589907993728,4cyclictest0-21swapper/122:20:001
2589899993729,4cyclictest2-21kthreadd22:05:010
2589919993627,5cyclictest0-21swapper/320:05:023
2589919993625,5cyclictest0-21swapper/300:40:003
2589913993630,4cyclictest2690393-21munin-plugin-st23:59:592
2589907993626,6cyclictest0-21swapper/120:05:251
2589907993624,7cyclictest2684882-21head23:40:251
2589907993624,7cyclictest0-21swapper/123:25:251
2589899993624,7cyclictest0-21swapper/000:10:250
2589899993624,7cyclictest0-21swapper/000:10:250
2589899993619,14cyclictest121ktimers/023:09:110
2589919993527,4cyclictest0-21swapper/321:40:013
2589919993525,6cyclictest0-21swapper/320:30:273
2589913993527,4cyclictest0-21swapper/223:50:002
2589913993524,7cyclictest2603863-21grep19:45:262
2589913993522,9cyclictest2628358-21sh21:00:012
2589907993527,5cyclictest2653959-21idleruntime-cro22:15:001
2589899993527,5cyclictest0-21swapper/020:05:010
2589899993511,12cyclictest0-21swapper/022:45:000
258989999350,8cyclictest11-21ksoftirqd/019:40:010
2589919993426,4cyclictest0-21swapper/320:10:173
2589919993424,6cyclictest0-21swapper/322:50:013
2589913993426,4cyclictest0-21swapper/220:45:002
2589913993425,5cyclictest2597021-21unixbench_multi19:25:262
2589907993425,4cyclictest0-21swapper/122:30:161
2589907993424,7cyclictest2631312-21grep21:05:271
2589907993423,7cyclictest2628360-21auditctl21:00:001
258989999344,21cyclictest11-21ksoftirqd/000:10:000
2589899993423,4cyclictest131rcu_preempt23:50:200
2589899993422,6cyclictest131rcu_preempt23:13:500
2589899993418,9cyclictest131rcu_preempt21:36:370
2589899993413,14cyclictest131rcu_preempt22:55:010
2589899993413,14cyclictest131rcu_preempt22:55:000
258991999336,9cyclictest0-21swapper/321:20:233
2589919993325,4cyclictest0-21swapper/321:45:273
2589919993325,4cyclictest0-21swapper/300:35:003
2589919993318,3cyclictest131rcu_preempt22:20:173
2589919993318,3cyclictest131rcu_preempt22:20:173
2589913993326,4cyclictest2679968-21munin-plugin-st23:30:002
2589913993323,6cyclictest2638145-21grep21:25:292
2589907993326,4cyclictest2634708-21unixbench_multi21:15:261
2589907993325,4cyclictest0-21swapper/123:09:591
2589907993325,3cyclictest0-21swapper/120:30:171
2589907993324,4cyclictest0-21swapper/122:00:011
2589907993322,7cyclictest2615758-21grep20:20:251
2589907993322,7cyclictest0-21swapper/122:20:251
2589907993322,7cyclictest0-21swapper/122:20:251
258989999332,6cyclictest11-21ksoftirqd/022:50:010
2589899993325,4cyclictest0-21swapper/000:20:240
2589899993324,6cyclictest0-21swapper/020:55:010
2589899993315,3cyclictest131rcu_preempt22:16:240
2589899993315,3cyclictest131rcu_preempt22:16:240
2589899993312,5cyclictest11-21ksoftirqd/021:50:000
2589899993311,4cyclictest131rcu_preempt20:25:200
2589919993224,4cyclictest0-21swapper/322:15:163
2589919993224,4cyclictest0-21swapper/322:15:163
2589919993223,6cyclictest2693380-21grep00:05:273
2589913993223,6cyclictest2610682-21grep20:05:252
2589913993223,5cyclictest2633063-21unixbench_singl21:10:252
2589913993222,6cyclictest2615761-21unixbench_multi20:20:252
2589907993225,4cyclictest2693437-21kworker/u8:0-ext4-rsv-conversion00:20:001
2589907993224,4cyclictest0-21swapper/119:30:201
2589899993225,3cyclictest0-21swapper/022:35:150
2589899993222,7cyclictest2628445-21wc21:00:000
2589899993221,8cyclictest151rcuc/023:55:210
2589899993218,3cyclictest131rcu_preempt21:55:000
2589899993216,5cyclictest131rcu_preempt21:25:210
2589899993215,5cyclictest131rcu_preempt23:25:140
258991999319,6cyclictest40-21ksoftirqd/322:55:203
258991999319,6cyclictest40-21ksoftirqd/322:55:203
258991999318,6cyclictest40-21ksoftirqd/320:55:213
2589919993123,4cyclictest0-21swapper/322:35:243
2589919993121,6cyclictest2598739-21grep19:30:243
2589919993116,12cyclictest2626033-21/usr/sbin/munin20:50:253
2589913993124,4cyclictest2648839-21munin-run22:00:002
2589913993123,5cyclictest2599161-21sh19:35:002
2589913993122,6cyclictest0-21swapper/220:45:152
2589913993120,7cyclictest2676068-21grep23:15:262
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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