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2026-09-04 - 06:13

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 Sep 04, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2612121310sleep1121650irq/29-eth0_g0_23:25:281
894621140sleep0121750irq/30-eth0_g0_22:15:090
255742880sleep0121750irq/30-eth0_g0_21:10:540
219692590sleep0121750irq/30-eth0_g0_20:56:050
16332580sleep0121750irq/30-eth0_g0_21:45:440
121650550irq/29-eth0_g0_2733099cyclictest23:41:130
280042530sleep0121750irq/30-eth0_g0_23:31:120
198462530sleep1121750irq/30-eth0_g0_22:58:481
121650500irq/29-eth0_g0_2733099cyclictest21:36:150
121650500irq/29-eth0_g0_13-21kworker/0:121:46:130
50312490sleep0121750irq/30-eth0_g0_21:57:180
198422480sleep0121750irq/30-eth0_g0_20:46:070
121470ksoftirqd/1121750irq/30-eth0_g0_23:05:091
121750460irq/30-eth0_g0_26352-21chrt19:01:041
121460ksoftirqd/1121750irq/30-eth0_g0_22:40:021
121750440irq/30-eth0_g0_386-21munin-run21:40:511
121750440irq/30-eth0_g0_121ksoftirqd/121:43:051
121430ksoftirqd/1121650irq/29-eth0_g0_21:51:460
121750420irq/30-eth0_g0_5385-21/usr/sbin/munin00:11:121
121750420irq/30-eth0_g0_1219-21kworker/1:221:15:111
121750420irq/30-eth0_g0_1219-21kworker/1:200:25:081
121650420irq/29-eth0_g0_26720-21wc19:01:120
121650420irq/29-eth0_g0_13-21kworker/0:121:06:390
121420ksoftirqd/1121750irq/30-eth0_g0_20:01:081
236652410sleep0121750irq/30-eth0_g0_23:15:260
121750410irq/30-eth0_g0_1219-21kworker/1:223:53:491
121750410irq/30-eth0_g0_1219-21kworker/1:223:11:391
121750410irq/30-eth0_g0_1219-21kworker/1:221:25:131
121650410irq/29-eth0_g0_7463-21entropy00:21:030
121650410irq/29-eth0_g0_3884-21sed19:41:090
121410ksoftirqd/1121650irq/29-eth0_g0_21:55:491
121750400irq/30-eth0_g0_2093-21snmpd19:57:211
121750400irq/30-eth0_g0_121ksoftirqd/122:32:011
121750400irq/30-eth0_g0_121ksoftirqd/121:56:151
121650400irq/29-eth0_g0_31ksoftirqd/021:16:400
121650400irq/29-eth0_g0_2733099cyclictest23:17:030
121650400irq/29-eth0_g0_121ksoftirqd/123:18:061
121750390irq/30-eth0_g0_2109-21lldpd23:49:121
121750390irq/30-eth0_g0_1219-21kworker/1:222:49:541
121750390irq/30-eth0_g0_1219-21kworker/1:222:22:451
121750390irq/30-eth0_g0_1219-21kworker/1:222:22:451
121650390irq/29-eth0_g0_17132-21unixbench_singl22:46:180
121650390irq/29-eth0_g0_15616-21ntp_states22:41:090
121650390irq/29-eth0_g0_13-21kworker/0:100:33:320
121650390irq/29-eth0_g0_13-21kworker/0:100:11:120
121650390irq/29-eth0_g0_121ksoftirqd/100:01:131
102102390sleep0121750irq/30-eth0_g0_20:06:110
192742380chrt121750irq/30-eth0_g0_22:56:090
121750380irq/30-eth0_g0_1219-21kworker/1:222:28:281
121750380irq/30-eth0_g0_1219-21kworker/1:221:07:111
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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