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2026-06-29 - 10:24

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 Mon Jun 29, 2026 00:43:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
764621240sleep1121650irq/29-eth0_g0_21:20:031
151132930sleep0121750irq/30-eth0_g0_21:51:330
121930ksoftirqd/1121750irq/30-eth0_g0_19:12:391
121730ksoftirqd/1121750irq/30-eth0_g0_20:27:451
121710ksoftirqd/1121750irq/30-eth0_g0_00:32:531
102652680sleep1121750irq/30-eth0_g0_19:18:491
121600ksoftirqd/1258992sleep020:23:440
121580ksoftirqd/1121750irq/30-eth0_g0_23:22:420
115392580sleep0121650irq/29-eth0_g0_21:37:380
73432570sleep0121750irq/30-eth0_g0_23:33:190
121540ksoftirqd/1121750irq/30-eth0_g0_23:43:341
121520ksoftirqd/1121750irq/30-eth0_g0_23:13:540
121490ksoftirqd/1121750irq/30-eth0_g0_19:43:171
121750470irq/30-eth0_g0_12792-21proc_pri19:28:511
121470ksoftirqd/1121750irq/30-eth0_g0_23:03:281
121750460irq/30-eth0_g0_121ksoftirqd/122:08:511
121750460irq/30-eth0_g0_121ksoftirqd/122:08:511
121460ksoftirqd/1121750irq/30-eth0_g0_22:01:041
121460ksoftirqd/1121750irq/30-eth0_g0_21:15:051
121460ksoftirqd/1121750irq/30-eth0_g0_19:43:480
121460ksoftirqd/1121750irq/30-eth0_g0_00:36:321
121460ksoftirqd/1121650irq/29-eth0_g0_22:22:340
121450ksoftirqd/1121750irq/30-eth0_g0_23:19:341
121750440irq/30-eth0_g0_1219-21kworker/1:223:26:551
121750440irq/30-eth0_g0_1219-21kworker/1:223:26:551
121750440irq/30-eth0_g0_121ksoftirqd/122:39:591
121650440irq/29-eth0_g0_13-21kworker/0:122:01:030
121440ksoftirqd/1121750irq/30-eth0_g0_21:41:351
121440ksoftirqd/1121750irq/30-eth0_g0_21:23:461
121440ksoftirqd/1121750irq/30-eth0_g0_21:23:461
141002430sleep0121650irq/29-eth0_g0_21:48:330
121750430irq/30-eth0_g0_1219-21kworker/1:223:28:541
121650430irq/29-eth0_g0_31ksoftirqd/020:28:480
121650430irq/29-eth0_g0_19008-21sendmail_mailqu00:18:510
121750420irq/30-eth0_g0_121ksoftirqd/100:03:501
121650420irq/29-eth0_g0_6656-21grep19:03:510
121650420irq/29-eth0_g0_31ksoftirqd/023:24:150
121650420irq/29-eth0_g0_31ksoftirqd/023:24:150
121420ksoftirqd/1121650irq/29-eth0_g0_23:04:391
23102410sleep0121650irq/29-eth0_g0_23:11:500
121750410irq/30-eth0_g0_121ksoftirqd/121:10:231
121650410irq/29-eth0_g0_13-21kworker/0:123:58:460
121650410irq/29-eth0_g0_13-21kworker/0:122:24:470
121650410irq/29-eth0_g0_121ksoftirqd/122:53:130
121650410irq/29-eth0_g0_121ksoftirqd/119:43:491
121410ksoftirqd/1121650irq/29-eth0_g0_23:17:491
734199406cyclictest1305-21unixbench_multi20:53:541
121650400irq/29-eth0_g0_31ksoftirqd/020:13:460
121650400irq/29-eth0_g0_31ksoftirqd/000:38:020
121650400irq/29-eth0_g0_20734-21sshd20:02:580
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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