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2026-08-13 - 23:56

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 Thu Aug 13, 2026 12:43:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2482121010sleep0121650irq/29-eth0_g0_09:40:140
121820ksoftirqd/1121750irq/30-eth0_g0_09:21:210
244572740sleep1121650irq/29-eth0_g0_11:51:441
194262740sleep0121750irq/30-eth0_g0_11:31:030
121670ksoftirqd/1121750irq/30-eth0_g0_08:17:030
282732660sleep0121650irq/29-eth0_g0_09:52:350
309532570sleep1121750irq/30-eth0_g0_10:05:171
14952540sleep1121750irq/30-eth0_g0_12:28:461
267752530sleep1121650irq/29-eth0_g0_12:01:041
121530ksoftirqd/1121750irq/30-eth0_g0_08:22:031
205842520sleep0121750irq/30-eth0_g0_11:35:160
107702500sleep0121650irq/29-eth0_g0_10:55:080
121490ksoftirqd/1121750irq/30-eth0_g0_12:32:461
121490ksoftirqd/1121750irq/30-eth0_g0_11:40:351
121490ksoftirqd/1121750irq/30-eth0_g0_11:40:351
121480ksoftirqd/1121750irq/30-eth0_g0_09:28:201
121650470irq/29-eth0_g0_210782sleep009:24:240
121470ksoftirqd/1121650irq/29-eth0_g0_08:57:351
284972450sleep1121750irq/30-eth0_g0_09:55:141
121650450irq/29-eth0_g0_13-21kworker/0:109:59:050
121650450irq/29-eth0_g0_11636-21unixbench_multi10:57:040
121450ksoftirqd/1121650irq/29-eth0_g0_08:01:051
121750440irq/30-eth0_g0_1219-21kworker/1:210:48:281
121650440irq/29-eth0_g0_20001-21sendmail_mailqu07:07:020
121650440irq/29-eth0_g0_20001-21sendmail_mailqu07:07:020
121650440irq/29-eth0_g0_13-21kworker/0:110:39:070
121650440irq/29-eth0_g0_13-21kworker/0:110:39:070
121440ksoftirqd/1121650irq/29-eth0_g0_08:34:041
121440ksoftirqd/1121650irq/29-eth0_g0_07:08:501
121440ksoftirqd/1121650irq/29-eth0_g0_07:08:501
166532430sleep1121650irq/29-eth0_g0_11:17:191
121650430irq/29-eth0_g0_2556-21df_abs10:21:540
121650430irq/29-eth0_g0_18361-21df_abs07:01:550
121430ksoftirqd/1121650irq/29-eth0_g0_12:17:061
121430ksoftirqd/1121650irq/29-eth0_g0_12:12:061
121430ksoftirqd/1121650irq/29-eth0_g0_12:12:061
121430ksoftirqd/1121650irq/29-eth0_g0_09:31:220
121430ksoftirqd/1121650irq/29-eth0_g0_07:52:061
121750420irq/30-eth0_g0_1219-21kworker/1:212:24:071
121750420irq/30-eth0_g0_1219-21kworker/1:209:16:111
121650420irq/29-eth0_g0_31ksoftirqd/011:21:420
121650420irq/29-eth0_g0_2325-21proc_pri12:32:020
121650420irq/29-eth0_g0_1964-21runrttasks07:51:160
121650420irq/29-eth0_g0_13-21kworker/0:111:59:350
121650420irq/29-eth0_g0_13-21kworker/0:111:12:260
121650420irq/29-eth0_g0_13-21kworker/0:110:46:460
121420ksoftirqd/1121650irq/29-eth0_g0_09:43:251
1937299411cyclictest22603-21timerandwakeup11:42:011
121750410irq/30-eth0_g0_1219-21kworker/1:209:41:411
121750410irq/30-eth0_g0_121ksoftirqd/111:28:321
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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