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2026-06-10 - 08:00

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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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 Wed Jun 10, 2026 00:43:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1211080ksoftirqd/1121750irq/30-eth0_g0_00:01:581
1211050ksoftirqd/1121750irq/30-eth0_g0_20:52:301
1211050ksoftirqd/1121750irq/30-eth0_g0_00:09:251
1878221010chrt121750irq/30-eth0_g0_21:33:440
1211010ksoftirqd/1121750irq/30-eth0_g0_22:46:480
121930ksoftirqd/1121750irq/30-eth0_g0_21:49:501
121870ksoftirqd/1121750irq/30-eth0_g0_21:59:321
121870ksoftirqd/1121650irq/29-eth0_g0_20:59:320
121870ksoftirqd/1121650irq/29-eth0_g0_20:59:320
121790ksoftirqd/1121750irq/30-eth0_g0_22:19:031
71592600sleep0121750irq/30-eth0_g0_22:58:130
71592600sleep0121750irq/30-eth0_g0_22:58:130
121590ksoftirqd/1121750irq/30-eth0_g0_22:54:551
121590ksoftirqd/1121750irq/30-eth0_g0_22:54:551
121510ksoftirqd/1121750irq/30-eth0_g0_23:44:531
121510ksoftirqd/1121750irq/30-eth0_g0_23:35:051
121510ksoftirqd/1121750irq/30-eth0_g0_00:14:300
121500ksoftirqd/1121650irq/29-eth0_g0_23:09:170
121490ksoftirqd/1121750irq/30-eth0_g0_21:41:091
121480ksoftirqd/1121750irq/30-eth0_g0_23:58:321
203792460sleep0121750irq/30-eth0_g0_23:50:070
121650460irq/29-eth0_g0_13-21kworker/0:100:04:390
121650450irq/29-eth0_g0_1964-21runrttasks19:04:310
121450ksoftirqd/1121750irq/30-eth0_g0_00:36:331
121750440irq/30-eth0_g0_1219-21kworker/1:223:05:331
121440ksoftirqd/1121650irq/29-eth0_g0_21:20:051
121750430irq/30-eth0_g0_1219-21kworker/1:223:50:041
121750430irq/30-eth0_g0_1219-21kworker/1:221:25:251
121650430irq/29-eth0_g0_31ksoftirqd/021:52:450
121430ksoftirqd/1121750irq/30-eth0_g0_23:39:281
121430ksoftirqd/1121750irq/30-eth0_g0_21:38:521
121750420irq/30-eth0_g0_1219-21kworker/1:200:21:421
121650420irq/29-eth0_g0_1964-21runrttasks23:55:130
121650420irq/29-eth0_g0_1568799cyclictest23:09:200
121420ksoftirqd/1121650irq/29-eth0_g0_00:33:071
1568899419cyclictest23262-21/usr/sbin/munin19:39:301
121750410irq/30-eth0_g0_1219-21kworker/1:222:12:561
121650410irq/29-eth0_g0_31ksoftirqd/023:34:050
121650410irq/29-eth0_g0_31ksoftirqd/000:35:250
121650410irq/29-eth0_g0_13-21kworker/0:122:17:570
1568899407cyclictest0-21swapper/121:09:321
121750400irq/30-eth0_g0_1219-21kworker/1:223:14:371
121750400irq/30-eth0_g0_1219-21kworker/1:223:12:511
121750400irq/30-eth0_g0_1219-21kworker/1:222:53:541
121750400irq/30-eth0_g0_1219-21kworker/1:222:39:421
121650400irq/29-eth0_g0_31ksoftirqd/020:24:330
121650400irq/29-eth0_g0_2601-21df_inode22:39:300
121650400irq/29-eth0_g0_1964-21runrttasks00:10:570
121650400irq/29-eth0_g0_16908-21chrt23:37:300
121650400irq/29-eth0_g0_13-21kworker/0:121:58:460
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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