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2026-06-06 - 00:45

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 Fri Jun 05, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
627921020sleep1121650irq/29-eth0_g0_12:06:121
923321010sleep0121650irq/29-eth0_g0_10:05:410
283022870sleep1121650irq/29-eth0_g0_09:12:191
121860ksoftirqd/1121750irq/30-eth0_g0_09:53:571
121860ksoftirqd/1121650irq/29-eth0_g0_11:54:470
121820ksoftirqd/1121750irq/30-eth0_g0_11:33:381
253382710sleep0121650irq/29-eth0_g0_11:12:460
121710ksoftirqd/1121750irq/30-eth0_g0_12:13:361
154192700sleep0121750irq/30-eth0_g0_10:31:230
212692680chrt121750irq/30-eth0_g0_10:54:501
238962550sleep1121650irq/29-eth0_g0_11:05:141
238962550sleep1121650irq/29-eth0_g0_11:05:141
22822540sleep1121750irq/30-eth0_g0_07:24:511
121750510irq/30-eth0_g0_1219-21kworker/1:211:34:441
121510ksoftirqd/1121750irq/30-eth0_g0_11:15:131
121490ksoftirqd/1121650irq/29-eth0_g0_09:27:190
121750470irq/30-eth0_g0_22279-21ntpdc10:59:450
121470ksoftirqd/1121750irq/30-eth0_g0_12:31:271
121470ksoftirqd/1121650irq/29-eth0_g0_11:02:541
121750460irq/30-eth0_g0_13529-21runrttasks12:35:041
121460ksoftirqd/1121650irq/29-eth0_g0_11:41:351
326282450sleep0121750irq/30-eth0_g0_11:41:560
121650450irq/29-eth0_g0_1964-21runrttasks07:05:301
121750440irq/30-eth0_g0_1219-21kworker/1:210:53:431
121750440irq/30-eth0_g0_1219-21kworker/1:209:43:301
121750440irq/30-eth0_g0_121ksoftirqd/109:35:071
121650440irq/29-eth0_g0_11572-21df_inode08:04:410
129592430sleep1121650irq/29-eth0_g0_10:21:151
121750430irq/30-eth0_g0_1219-21kworker/1:211:20:071
121650430irq/29-eth0_g0_49392sleep011:59:550
121650430irq/29-eth0_g0_121ksoftirqd/111:16:380
121430ksoftirqd/1121750irq/30-eth0_g0_11:48:471
121430ksoftirqd/1121750irq/30-eth0_g0_09:30:131
121430ksoftirqd/1121650irq/29-eth0_g0_10:29:431
121430ksoftirqd/1121650irq/29-eth0_g0_10:12:590
121430ksoftirqd/1121650irq/29-eth0_g0_10:12:590
119952430sleep0121650irq/29-eth0_g0_10:19:180
30270994227cyclictest1964-21runrttasks12:14:471
3027099422cyclictest19445-21awk08:34:511
3027099422cyclictest19445-21awk08:34:511
125802420sleep0121750irq/30-eth0_g0_12:33:170
121750420irq/30-eth0_g0_1219-21kworker/1:209:54:461
121750420irq/30-eth0_g0_1219-21kworker/1:209:45:361
121650420irq/29-eth0_g0_31ksoftirqd/011:48:250
121650420irq/29-eth0_g0_31ksoftirqd/011:27:090
121650420irq/29-eth0_g0_31ksoftirqd/009:47:570
121650420irq/29-eth0_g0_121ksoftirqd/112:15:570
121750410irq/30-eth0_g0_1219-21kworker/1:209:19:091
121650410irq/29-eth0_g0_31ksoftirqd/009:14:420
121650410irq/29-eth0_g0_19744-21memory10:49:430
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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