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2026-04-14 - 09:22

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #3, 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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  Eltec
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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
Compare latency of primary with shadow system
Characteristics of the 50 highest latencies:
System rack3slot5s.osadl.org (updated Tue Apr 14, 2026 00:43:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1524221380chrt3129650irq/29-eth0_g0_23:17:401
778221260sleep03129650irq/29-eth0_g0_22:46:260
2427521220sleep13129650irq/29-eth0_g0_21:41:391
900921040sleep13129750irq/30-eth0_g0_22:51:281
265742750sleep13129750irq/30-eth0_g0_00:04:251
95002600sleep03129650irq/29-eth0_g0_22:54:260
88252550sleep03129650irq/29-eth0_g0_22:49:360
42452540sleep13129650irq/29-eth0_g0_22:33:061
138242510sleep13129750irq/30-eth0_g0_23:10:261
121490ksoftirqd/13129750irq/30-eth0_g0_19:29:341
121480ksoftirqd/13129750irq/30-eth0_g0_22:59:511
121480ksoftirqd/13129750irq/30-eth0_g0_00:20:051
121450ksoftirqd/13129650irq/29-eth0_g0_22:57:271
3129750440irq/30-eth0_g0_31295-21kworker/1:100:27:351
3129650440irq/29-eth0_g0_121ksoftirqd/121:17:560
121440ksoftirqd/13129750irq/30-eth0_g0_00:38:320
121440ksoftirqd/13129750irq/30-eth0_g0_00:38:320
121440ksoftirqd/13129650irq/29-eth0_g0_23:41:391
121440ksoftirqd/13129650irq/29-eth0_g0_23:41:391
121440ksoftirqd/13129650irq/29-eth0_g0_20:53:251
3129750430irq/30-eth0_g0_31295-21kworker/1:100:34:341
3129750430irq/30-eth0_g0_31295-21kworker/1:100:34:341
1889699431cyclictest15911-21diskmemload22:21:491
121430ksoftirqd/13129650irq/29-eth0_g0_23:54:321
121430ksoftirqd/13129650irq/29-eth0_g0_22:42:211
121430ksoftirqd/13129650irq/29-eth0_g0_22:04:291
3129750420irq/30-eth0_g0_31295-21kworker/1:121:24:411
3129750420irq/30-eth0_g0_0-21swapper/119:09:341
3129650420irq/29-eth0_g0_10631-21df_abs22:59:260
30562420sleep03129650irq/29-eth0_g0_22:28:320
1889699421cyclictest6844-21tail20:29:371
78662410sleep13129650irq/29-eth0_g0_22:47:251
3129750410irq/30-eth0_g0_31295-21kworker/1:123:19:281
3129750410irq/30-eth0_g0_121ksoftirqd/122:15:491
3129650410irq/29-eth0_g0_13-21kworker/0:121:54:100
231072410sleep03129750irq/30-eth0_g0_21:37:180
181372410sleep13129750irq/30-eth0_g0_21:16:361
140092410sleep03129650irq/29-eth0_g0_23:12:350
3129750400irq/30-eth0_g0_31295-21kworker/1:121:09:551
3129750400irq/30-eth0_g0_121ksoftirqd/122:09:571
3129750400irq/30-eth0_g0_121ksoftirqd/121:46:231
3129650400irq/29-eth0_g0_6063-21ntp_states22:39:310
3129650400irq/29-eth0_g0_31ksoftirqd/000:13:320
3129650400irq/29-eth0_g0_18445-21sed19:04:340
3129650400irq/29-eth0_g0_18445-21sed19:04:340
3129650400irq/29-eth0_g0_13-21kworker/0:123:46:070
3129650400irq/29-eth0_g0_13-21kworker/0:123:41:500
3129650400irq/29-eth0_g0_13-21kworker/0:123:41:500
3129650400irq/29-eth0_g0_13-21kworker/0:123:08:350
3129650400irq/29-eth0_g0_13-21kworker/0:122:09:260
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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