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2026-07-23 - 17:00

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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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
Compare latency of primary with shadow system
Characteristics of the 50 highest latencies:
System rack3slot5s.osadl.org (updated Thu Jul 23, 2026 12:43:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
247032900sleep0121650irq/29-eth0_g0_09:32:370
121720ksoftirqd/1121750irq/30-eth0_g0_12:20:441
274532660sleep0121750irq/30-eth0_g0_11:54:030
189572590sleep1121750irq/30-eth0_g0_09:07:501
121530ksoftirqd/1121750irq/30-eth0_g0_12:09:191
121510ksoftirqd/1121650irq/29-eth0_g0_12:04:341
121650500irq/29-eth0_g0_31ksoftirqd/007:37:510
121490ksoftirqd/1121750irq/30-eth0_g0_11:21:231
121470ksoftirqd/1121750irq/30-eth0_g0_11:36:301
121470ksoftirqd/1121750irq/30-eth0_g0_11:36:301
45282460sleep1121650irq/29-eth0_g0_12:32:511
121750460irq/30-eth0_g0_22069-21taskset09:21:251
121460ksoftirqd/1121750irq/30-eth0_g0_09:31:151
121460ksoftirqd/1121750irq/30-eth0_g0_09:31:151
121460ksoftirqd/1121650irq/29-eth0_g0_11:53:271
121650450irq/29-eth0_g0_1964-21runrttasks07:04:160
121650450irq/29-eth0_g0_1964-21runrttasks07:04:160
121450ksoftirqd/1121750irq/30-eth0_g0_11:51:031
121750440irq/30-eth0_g0_9048-21runrttasks10:38:541
121440ksoftirqd/1121650irq/29-eth0_g0_10:49:191
121750430irq/30-eth0_g0_1219-21kworker/1:211:25:031
121750430irq/30-eth0_g0_1219-21kworker/1:210:00:191
121430ksoftirqd/1121750irq/30-eth0_g0_10:07:421
121430ksoftirqd/1121650irq/29-eth0_g0_08:57:131
121430ksoftirqd/1121650irq/29-eth0_g0_08:57:131
2147499429cyclictest243772sleep111:42:481
135182420chrt121650irq/29-eth0_g0_10:57:500
121750420irq/30-eth0_g0_1219-21kworker/1:210:31:201
121750420irq/30-eth0_g0_1219-21kworker/1:209:13:221
121750420irq/30-eth0_g0_121ksoftirqd/111:07:331
121420ksoftirqd/1121650irq/29-eth0_g0_10:24:291
2147499411cyclictest3446-21seq12:27:531
121750410irq/30-eth0_g0_1219-21kworker/1:210:47:281
121650410irq/29-eth0_g0_31ksoftirqd/009:20:560
121650410irq/29-eth0_g0_1334-21latency_hist07:57:340
121650410irq/29-eth0_g0_13-21kworker/0:110:47:510
121650410irq/29-eth0_g0_13-21kworker/0:110:15:340
121410ksoftirqd/1121750irq/30-eth0_g0_11:49:280
121410ksoftirqd/1121650irq/29-eth0_g0_10:57:571
121650400irq/29-eth0_g0_9236-21taskset08:27:520
121650400irq/29-eth0_g0_13-21kworker/0:111:45:190
121650400irq/29-eth0_g0_13-21kworker/0:111:41:180
121650400irq/29-eth0_g0_13-21kworker/0:111:35:050
121650400irq/29-eth0_g0_13-21kworker/0:111:35:050
121650400irq/29-eth0_g0_13-21kworker/0:111:27:510
121650400irq/29-eth0_g0_13-21kworker/0:110:30:470
121650400irq/29-eth0_g0_13-21kworker/0:109:48:210
121650400irq/29-eth0_g0_13-21kworker/0:109:29:550
121650400irq/29-eth0_g0_13-21kworker/0:109:29:550
121650400irq/29-eth0_g0_13-21kworker/0:109:16:550
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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